PRINCIPAL APPLICATION DEVELOPER

PRINCIPAL APPLICATION DEVELOPER

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PRINCIPAL APPLICATION DEVELOPER

Salary

$118,233.84 - $159,337.20 Annually

Location

Los Angeles County, CA

Job Type

Full time

Job Number

PH2526B

Department

PUBLIC HEALTH

Opening Date

07 / 23 / 2025

Closing Date

Continuous

Description

Benefits

Questions

Position / Program Information

EXAMINATION NUMBER : PH2526B

TYPE OF RECRUITMENT :

We encourage applications from anyone!

FIRST DAY OF FILING :

We will be accepting online applications starting Thursday, July 24, 2025 at 10 : 30 a.m. (PT) - Continuous.

We will keep accepting applications until the position is filled. The application window may close unexpectedly once we have enough qualified candidates.

CHECK OUT OUR OUTSTANDING BENEFITS!

We offer one of the strongest public-sector benefits packages in the country, including diverse healthcare choices, and strong retirement plans. For more information about the outstanding benefits offered by Los Angeles County, please visit us here :

ABOUT THIS POSITION :

We are looking for someone who performs highly specialized and complex information systems analysis and programming tasks and acts as technical expert for development or maintenance of one or more major systems. This position may also function as a lead for application development projects and may supervise lower-level application development personnel.

For information about the specific classification standards for this position, please visit the following link : Principal Application Developer. ()

Essential Job Functions

What will I do as a Principal Application Developer?

Provides technical expertise to project managers, department management, and / or user management regarding one or more major system development or maintenance efforts.

Advises management on technical alternatives, such as languages, tools, platforms, utilities, and servers.

Leads and participates in the work of a team of Application Developers engaged in the development or maintenance of the most highly technical programs.

Provides technical consulting on long-range information systems planning.

Programs the most specialized and complex applications.

Solves the more complex application software and system performance problems.

Analyzes performance data and conducts capacity planning.

Establishes quality assurance procedures.

Monitors vendors to ensure performance according to project goals and contract terms, and reports performance problems to management.

Assists in creating Statements of Work (SOWs) in support of applications development efforts, as needed.

Serves as a project manager, as needed.

Represents the department in collaborative efforts with other County departments, outside agencies, and / or vendors, as needed.

Supervises lower-level application development personnel, as needed.

Requirements

REQUIREMENTS TO QUALIFY :

OPTION I : A Bachelor's degree from an accredited

• college or university in Computer Science, Information Systems, or a closely related field, and four (4) years of progressively responsible
• , full-time, paid experience in a centralized information technology organization
• , coding, testing and debugging application programs.

OPTION II : Two (2) years of experience, within the last three years, at the level of the Los Angeles County class of Senior Application Developer

OPTION III : Five (5) years of progressively responsible

LICENSE :

A valid California Class C Driver License or the ability to utilize an alternative method of transportation when needed to carry out job-related essential functions.

PHYSICAL CLASS :

Physical Class II – Light : This class includes administrative and clerical positions requiring light physical effort that may include occasional light lifting to a 10-pound limit and some bending, stooping, or squatting. Considerable ambulation may be involved.

SPECIAL REQUIREMENT INFORMATION :

For more information on our standards for educational documents, please visit : and .

Accredited institutions are those listed in the publications of regional, national, or international accrediting agencies, which are accepted by the Department of Human Resources (DHR). Publications such as American Universities and Colleges and International Handbook of Universities are acceptable references. Also acceptable, if appropriate, are degrees that have been evaluated and deemed to be equivalent to degrees from United States accredited institutions by an academic credential evaluation agency recognized by The National Association of Credential Evaluation Services (NACES) () or theAssociation of International Credential Evaluators, Inc. (AICE) () . (see Employment Information under Accreditation Information).

Official Transcript is a transcript that bears the college seal and states "official and / or copy" issued by the school's registrar office.A printout of the transcript from the school's website is NOT considered official and may result in your application being incomplete and rejected.

We do not accept password-protected documents. Ensure documents are unlocked before attaching to your application or sending to the exam analyst.

WITHHOLD INFORMATION :

No withhold will be allowed. Required experience must be fully met at the time of filing and clearly indicated on the application.

NO OUT OF CLASS EXPERIENCE WILL BE ACCEPTED.

DESIRABLE QUALIFICATION :

Additional Information

EXAMINATION CONTENT :

Our Assessment Process :

Once we determine that you meet the requirements, we will invite you to participate in the following two (2) parts weighed 100% :

Part I : A multiple choice and / or simulation test assessing Professional Potential, Achievement, Coping with Uncertainty, Responsibility, Working to High Quality Standards, Willingness to Learn, Working Relationships, Analyzing Information, Learning Quickly, Generating New Ideas, Using Time Efficiently, Adapting to Change, and Deductive Reasoning.

Part II : A multiple choice and / or simulation test assessing

Agile Testing : Agile software development methodology; Agile software development approaches; Release and iteration planning; Continuous integration, Story template and retrospective meeting; Agile testing methods : behavior driven development, test driven development, acceptance test driven development; Assessing quality risks and estimating test effort; Sprint planning and effort estimation in Agile project management; Agile exploratory testing; Agile testing tools for task management and tracking, communication and information sharing; Tools for software-build, configuration management, test design, implementation and execution; Independent testing options, communicating test status, progress and product quality; Managing regression risk and evolving manual and automated test cases; and Test levels in Agile, test pyramid, types and quadrants.

SQL Server : SQL basic queries; Altering and truncating queries; Filtering and search conditions; Advanced data filtering; Grouping and aggregation in SQL; and Querying multiple tables.

MULTIPLE CHOICE AND / OR SIMULATION ASSESSMENTS ARE NOT REVIEWABLE BY CANDIDATES PER CIVIL SERVICE RULE 7.19

Applicants must meet the requirements and achieve 70% or higher on the combined score of Parts I and II in order to be placed on the eligible register.

All notifications including invitation letters will be sent electronically to the email address provided on the application. It is important that you provide a valid email address. Please addHRexams@ph.lacounty.gov,info@governmentjobs.com,talentcentral@shl.com,Noreply@governmentjobs.com, noreply@proctoru.com,donotreply@amcatmail.comand the domains ph.lacounty.gov and hr.lacounty.govto your email address and list of approved senders to prevent email notifications from being filtered as spam / junk / clutter mail.

It is your responsibility to take the above steps to view correspondence. Los Angeles County will not consider claims of not viewing or receiving notification to be a valid reason for late test administration or re-scheduling of a test component.

Plan to submit your online application well in advance as you may be required to verify your email address. This only needs to be done once per email address, and if you already have a job seeker account onwww.governmentjobs.com / careers / lacounty, you can verify at any time by logging in and following the prompts. This is to improve the security of your online application and to ensure you do not enter an incorrect email address.

Notice of Non-acceptance and Final Result letters will be sent via E-mail. Test scores cannot be given over the phone.

TRANSFER OF TEST COMPONENTS :

Applicants who have taken identical components recently for other exams may have their responses automatically transferred to this examination.

This examination contains test components that may be used in the future for new examinations and your test responses may be transferred.

TEST PREPARATION :

Study guides and other test preparation resources are available to help candidates prepare for employment tests. While the guides will help in preparing for the test, we advise you to review all related materials that you deem necessary.

An interactive, Online Test Preparation System for taking practice tests may be accessed on the Department of Human Resources website Please click on "Find a Job" and then "Job Search Toolkit." Test preparation information is located under the "Employment Test Assistance" section.

Additional practice tests are available at .

ELIGIBILITY INFORMATION :

The names of candidates will be added to the Eligible Register in the order of their score group for a period of twelve (12) months following the date of eligibility. Applications will be processed as they are received.

SELECTIVE CERTIFICATION :

In accordance with TITLE 5 - PERSONNEL, APPENDIX 1 (Civil Service Rule 11.03) of the Los Angeles County Code, the Department of Public Health is canvassing applicants to identify eligible candidates who have experience in allof the following areas :

Agile Software : 4 years of experiencedelivering projects involving Agile software development methodology in the following areas : release and iteration planning; continuous integration; story template authoring and conducting Agile ceremonies; tools for software build, configuration management, test design, implementation and execution; communicating test status, progress, and product quality.

Microsoft Software Engineering : 7 years of experiencedeveloping and implementing projects using Microsoft software engineering including : C#, .NET Core, ASP.NET, MVC.

Data Engineering and Microsoft SQL Server : 4 years of experiencein data engineering using Microsoft SQL Server including : SQL advanced queries; Advanced data filtering; Grouping and aggregation; SQL functions.

Cloud Services : 3 years of experience developing and implementing cloud services and engineering in Microsoft Azure, Amazon Web Services, or Google Cloud Platform.

Candidates should be prepared to respond to a supplemental questionnaire during the application process. In order to be considered for placement on the Selective Certification list for all areas, you are required to complete the associated supplemental questions. Your request to be placed on the selective certification list will be rejected if you do not complete the supplemental questions. The experience you claim in the supplemental questions must be consistent with the information you provide in your application. Candidates who pass the examination and meet the criteria identified in the supplemental questions will be placed on the Selective Certification list for all areas.

VACANCY INFORMATION :

The Eligible Register resulting from this examination will be used to fill vacancies in the Department of Public Health as they occur.

AVAILABLE SHIFT :

Any shift, including evenings, nights, weekends and holidays.

APPLICATION AND FILING INFORMATION :

HOW TO APPLY :

We only accept applications filed online. Applications submitted by U.S. mail, fax, or in person are not accepted. Apply online by clicking on the "Apply" green button at the top right of this posting. This website can also be used to get application status updates.

Please fill out the application completely! Provide relevant job experience including employer's name and address, job title, beginning and ending dates, number of hours worked per week, and description of work performed.

If the application and / or Supplemental Questionnaire is / are incomplete, the application will be REJECTED.

IMPORTANT NOTES :

We may verify information included in the application at any point during the examination and hiring process, including after an appointment has been made. Falsification of information could result in refusal of application or rescission of appointment. Copying verbiage from the Requirements or class specification as your work experience will not be sufficient to demonstrate meeting the requirements. Doing so may result in an incomplete application and may lead to disqualification.

PLEASE REVIEW YOUR APPLICATION CAREFULLY AND COMPLETELY PRIOR TO CLICKING THE "SUBMIT" BUTTON

COMPUTER AND INTERNET ACCESS AT PUBLIC LIBRARIES :

For candidates who may not have regular access to a computer or the internet, applications can be completed on computers at public libraries throughout Los Angeles County. Check the website for updated information

SOCIAL SECURITY NUMBER :

Please include your Social Security Number for record control purposes. Federal law requires that all employed persons have a Social Security Number.

DO NOT SHARE USER ID AND PASSWORD :

All applicants must file their application online using their OWN user ID and password. Using a family member or friend's user ID and password may erase a candidate's original application record.

ANTI-RACISM, DIVERSITY, AND INCLUSION (ARDI) :

The County of Los Angeles recognizes and affirms that all people are created equal and are entitled to all rights afforded by the Constitution of the United States. The Department of Public Health is committed to promoting Anti-racism, Diversity, and Inclusion efforts to address the in equalities and disparities amongst race. We support the ARDI Strategic Plan and its goals by improving equality, diversity, and inclusion in recruitment, selection, and employment practices.

Department Contact Name : Exam Analyst

Department Contact Phone : (213) 684-8726

Department Contact E-mail : HRExams@ph.lacounty.gov

Exam Number : PH2526B

California Relay Services Phone : (800) 735-2922

ADA Coordinator Phone : ( 844) 914-1006

T eletype Phone : (800) 897-0077

Alternate Teletype Phone : (800) 897-0077

COUNTY OF LOS ANGELES

Employment Information

Any language contained in the job posting supersedes any language contained below.

This document is intended to provide general information about the recruitment process of the County of Los Angeles. Applicants with questions about a specific job posting should contact the exam analyst listed on the posting.

Equal Employment Opportunity / Non-Discrimination Statement :

The County of Los Angeles is an Equal Employment Opportunity Employer and is committed to non-discrimination in the County workforce, regardless of age (40 and over); ancestry; color; ethnicity; religious creed; protected family or medical leave status; disability; marital status; medical condition; genetic information; military and veteran status; national origin; race ; sex; gender; sexual orientation; or any other characteristic protected by State or federal law. For more information, please visit :

Testing Accommodations for Applicants :

The County of Los Angeles complies with all federal and state disability laws and makes reasonable accommodations for qualified applicants and employees with disabilities. If a reasonable accommodation is needed to participate in the job application process, please contact the testing accommodation coordinator listed on the job posting. Hearing impaired applicants with telephone teletype equipment may leave messages by calling the teletype phone number on the job posting. For more information on accommodations, please visit :

Fair Chance :

The County of Los Angeles is a Fair Chance employer. Except as otherwise permissible under applicable laws, you will not be asked to provide information about conviction history unless you receive a conditional offer of employment. The County will make an individualized assessment of whether your conviction history has a direct and adverse relationship with the specific duties of the job, and will also consider potential mitigating factors, which may include, but is not limited to, evidence and extent of rehabilitation, recency of the offense(s), and age at the time of the offense(s). If asked to provide information about conviction history, any convictions or court records which are exempted by a valid court order do not have to be disclosed. Qualified applicants with arrest or conviction records will be considered for employment in accordance with County Fair Chance Policies and the Fair Chance Act (Gov. Code Section 12952).

Employment Eligibility :

Final appointment is contingent upon verification of U.S. citizenship or the right to work in the United States.

Career PathFinder :

Resources to help current and prospective employees plan a career with Los Angeles County are available. To explore career paths to and from nearly all job titles, please visit our interactive Career PathFinder application

Veteran’s Credit :

Pursuant to the County Charter and County policy, in all open competitive examinations (i.e., examinations open to everyone), the County of Los Angeles will add a credit of 10 percent of the total credits specified for such examination to the final passing score of an honorably discharged veteran, as well as the spouse of a deceased or disabled veteran, who served in the Armed Forces of the United States under specific conditions.

For more information on veteran’s credit, please visit :

Revised September 2025

For detailed information, please clickhere ()

01

Many important notifications will be sent electronically to the email address provided on the application. It is important that you provide a valid email address. Please add hrexams@ph.lacounty.gov and info@governmentjobs.com to your email address book and list of approved senders to prevent email notifications from being filtered as spam / junk / clutter mail.

Applicants have the ability to opt out of emails from Los Angeles County. If you unsubscribe, you will not receive any email notification for any examination for which you apply with Los Angeles County. Regardless of whether you choose to unsubscribe, you can always check for notifications by logging into governmentjobs.com and viewing your profile inbox, which saves a copy of all emailed notices. It is the applicant's responsibility to take the above steps to view correspondence.

Los Angeles County will not consider claims of not viewing or receiving notifications to be a valid reason for a late test administration or rescheduling of an exam component.

02

This Supplemental Questionnaire (SQ) is to be completed by all applicants for this examination. The information you provide on your application and on this supplemental questionnaire will be evaluated and used to determine your eligibility to participate in the next phase of the examination process.

Please be as specific as possible when answering by including all the information being requested.

Do not COPY AND PASTE all your duties as stated in the application under the Work Experience section, from your resume, and / or from the Class Specifications. In doing so, your application will be rejected as INCOMPLETE.

Comments such as "SEE RESUME" or "SEE APPLICATION" will not be considered a valid response, therefore, using such statements will also result in your application being rejected as INCOMPLETE.

You certify that the information provided is accurate, and you are aware that the information on the application, attachments, and Supplemental Questionnaire is subject to verification at any time during the examination and hiring process. You also understand that any false statements may result in disqualification or dismissal.

03

Please indicate which of the following requirements you possess.

If you do not meet the requirements, please indicate "Not Applicable."

Option I : A Bachelor's degree from an accredited

Option II : Two (2) years of experience, within the last three years, at the level of the Los Angeles County class of Senior Application Developer

Option III : Five (5) years of progressively responsible

Option I

Option II

Option III

Not Applicable

04

OPTION I - EDUCATION REQUIREMENT :

Do you have a Bachelor's degree from an accredited

For more information on our standards for educational documents, please visit :

Accredited institutions are those listed in the publications of regional, national, or international accrediting agencies, which are accepted by the Department of Human Resources (DHR). Publications such as American Universities and Colleges and International Handbook of Universities are acceptable references. Also acceptable, if appropriate, are degrees that have been evaluated and deemed to be equivalent to degrees from United States accredited institutions by an academic credential evaluation agency recognized by The National Association of Credential Evaluation Services (NACES)or the Association of International Credential Evaluators, Inc. (AICE). (see Employment Information under Accreditation Information).

Official Transcript is a transcript that bears the college seal and states "official and / or copy" issued by the school's registrar office. A printout of the transcript from the school's website is NOT considered official and may result in your application being incomplete and rejected.

We do not accept password-protected documents. Ensure documents are unlocked before attaching to your application or sending to the exam analyst.

Yes, I have attached a copy of my Official Diploma, Official Transcript(s), or Official Letter with my application.

Yes, I will email a copy of my Official Diploma, Official Transcript(s), or Official Letter within fifteen (15) calendar days of my application submission to HRexams@ph.lacounty.gov.

No, I do not possess a Bachelor's degree from an accredited college or university in Computer Science, Information Systems, or a closely-related field.

05

OPTION I - EXPERIENCE REQUIREMENT :

Please describe in detailyour progressively responsible

If you do not have this experience please indicate "Not Applicable".

NOTE : Foreach experienceplease indicate the following information :

a)Employer's Name and Address

b)Position / Title held

c)Employment Period : From (MM / YYYY) To (MM / YYYY)

d)Hours Worked per Week

e)Describe experience / responsibilities in detail.

You will not receive credit for your response if you have missing requested information.

(Comments such as "see resume or application" will not be considered as a response.)

06

OPTION II - EXPERIENCE REQUIREMENT :

Please describe in detailyour experience at the level of the Los Angeles County class of Senior Application Developer

If you do not have this experience please indicate "Not Applicable".

NOTE : Foreach experienceplease indicate the following information :

a)Employer's Name and Address

b)Position / Title held

c)Employment Period : From (MM / YYYY) To (MM / YYYY)

d)Hours Worked per Week

e)Describe experience / responsibilities in detail.

You will not receive credit for your response if you have missing requested information.

(Comments such as "see resume or application" will not be considered as a response.)

07

OPTION III - EXPERIENCE REQUIREMENT :

Please describe in detailyour progressively responsible

If you do not have this experience please indicate "Not Applicable".

NOTE : Foreach experienceplease indicate the following information :

a)Employer's Name and Address

b)Position / Title held

c)Employment Period : From (MM / YYYY) To (MM / YYYY)

d)Hours Worked per Week

e)Describe experience / responsibilities in detail.

You will not receive credit for your response if you have missing requested information.

(Comments such as "see resume or application" will not be considered as a response.)

08

SELECTIVE CERTIFICATIONThe following set of questions will be used to determine your eligibility to be placed on Selective Certification List. Read each question carefully and be as specific as possible, including all information related to the functional area identified for Selective Certification. Comments such as "see resume or application" will not be considered as response.THE EXPERIENCE YOU CLAIM MUST BE CONSISTENT WITH THE EXPERIENCE LISTED IN YOUR APPLICATION.Please note that all information is subject to verification at any time in the examination and hiring process.

09

Do you have at least 4 years of experience delivering projects involving Agile software development methodology in the following areas : release and iteration planning; continuous integration; story template authoring and conducting Agile ceremonies; tools for software build, configuration management, test design, implementation and execution; communicating test status, progress, and product quality?

Yes, I have at least 4 years of experience.

No, I do not have 4 years of experience.

10

If you indicated that you have the experience listed in the previous question, beginning with your most recent job, please provide the following information :

NOTE : Foreach experienceplease indicate the following information :

a)Employer's Name and Address

b)Position / Title held

c)Employment Period : From (MM / YYYY) To (MM / YYYY)

d)Hours Worked per Week

e)Describe experience / responsibilities in detail.

You will not receive credit for your response if you have missing requested information.

Comments such as "see resume or application" will not be considered a response.

11

Do you have at least 7 years of experience in developing and implementing projects using Microsoft software engineering including : C#, .NET Core, ASP.NET, MVC?

Yes, I have at least 7 years of experience.

No, I do not have 7 years of experience.

12

If you indicated that you have the experience listed in the previous question, beginning with your most recent job, please provide the following information :

NOTE : Foreach experienceplease indicate the following information :

a)Employer's Name and Address

b)Position / Title held

c)Employment Period : From (MM / YYYY) To (MM / YYYY)

d)Hours Worked per Week

e)Describe experience / responsibilities in detail.

You will not receive credit for your response if you have missing requested information.

Comments such as "see resume or application" will not be considered a response.

13

Do you have at least 4 years of experience in data engineering using Microsoft SQL Server including : SQL advanced queries; Advanced data filtering; Grouping and aggregation; SQL functions?

Yes, I have at least 4 years of experience.

No, I do not have 4 years of experience.

14

If you indicated that you have the experience listed in the previous question, beginning with your most recent job, please provide the following information :

NOTE : Foreach experienceplease indicate the following information :

a)Employer's Name and Address

b)Position / Title held

c)Employment Period : From (MM / YYYY) To (MM / YYYY)

d)Hours Worked per Week

e)Describe experience / responsibilities in detail.

You will not receive credit for your response if you have missing requested information.

Comments such as "see resume or application" will not be considered a response.

15

Do you have at least 3 years of experience developing and implementing cloud services and engineering in Microsoft Azure, Amazon Web Services, or Google Cloud Platform?

Yes, I have at least 3 years of experience.

No, I do not have 3 years of experience.

16

If you indicated that you have the experience listed in the previous question, beginning with your most recent job, please provide the following information :

NOTE : Foreach experienceplease indicate the following information :

a)Employer's Name and Address

b)Position / Title held

c)Employment Period : From (MM / YYYY) To (MM / YYYY)

d)Hours Worked per Week

e)Describe experience / responsibilities in detail.

You will not receive credit for your response if you have missing requested information.

Comments such as "see resume or application" will not be considered a response.

17

DESIRABLE QUALIFICATION

The following question relates to a desirable qualification and will not be used to establish the final list or specialized secondary lists for this position. However, if you are eligible for hire, Hiring Managers may use your response during the selection process. As such, it is important to answer the following question carefully and accurately to ensure you are fully considered.

Do you have experience using Power Platform (Power BI, Power Automate, Power Apps) and Microsoft Dynamics?

Yes, I have the experience.

No, I do not have the experience.

18

DESIRABLE QUALIFICATION

If you indicated that you have the experience using Power Platform (Power BI, Power Automate, Power Apps) and Microsoft Dynamics, please provide the following details :

NOTE : Foreach experienceplease indicate the following information :

a)Employer's Name and Address

b)Position / Title held

c)Employment Period : From (MM / YYYY) To (MM / YYYY)

d)Hours Worked per Week

e)Describe experience / responsibilities in detail.

You will not receive credit for your response if you have missing requested information.

Comments such as "see resume or application" will not be considered a response.

Required Question

Employer

County of Los Angeles

Address

Los Angeles, California, 90010

Website

Apply

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