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Sr Engineer - Tax Technology Software
Sr Engineer - Tax Technology SoftwareT-Mobile • Frisco, Texas
Sr Engineer - Tax Technology Software

Sr Engineer - Tax Technology Software

T-Mobile • Frisco, Texas
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  • [job_card.full_time]
  • [job_card.part_time]
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At T-Mobile, we invest in YOU! Our Total Rewards Package ensures that employees get the same big love we give our customers. All team members receive a competitive base salary and compensation package - this is Total Rewards. Employees enjoy multiple wealth-building opportunities through our annual stock grant, employee stock purchase plan, 401(k), and access to free, year-round money coaches. That’s how we’re UNSTOPPABLE for our employees!

Job Overview

Are you ready to join the Un-carrier movement?

The Sr Software Engineer works with a team of other software engineers, network and systems engineers to compose, implement, and deploy software which meet customer requirements, scales easily, removes the limitations of traditional solutions, and supports deployment in highly available environments. This role presents an ideal opportunity to function as a technical lead regarding our tax technology software, with ownership of architecture decisions and long-term strategy. This role is the first in-house engineering position on the IT Tax Technology team, responsible for establishing a build-focused engineering practice, driving in-house technical expertise and shaping the future of our tax technology architecture. This is a hands-on leadership role requiring technical perfection, platform expertise, and multi-functional collaboration.

We are a team that encourages innovation and advocates an agile and open approach, truly working and playing in the Un-carrier way!

Job Responsibilities :

Technical Engineering Services

  • Drive engineering projects by developing software solutions, conducting tests and inspections, and preparing reports related to Vertex tax engine.
  • Understands system protocols, how systems operate and data flows.
  • Expected to independently develop a full software stack. Understands the building blocks, interactions, dependencies, and tools required to complete software and automation work.
  • Independent study of current technology is expected.
  • Interact with system engineers to define system requirements and / or vital requirements for automation.

Design, build, and support backend services using .NET (Core / 6 / 7) and frontend UI components in Angular.

  • Develop and maintain SQL Server (AWS RDS) databases supporting tax applications.
  • Build orchestration layers for tax workflows to handle integration across billing systems, ERP, exemption services and tax engines.
  • Implement and handle cloud-native and hybrid deployments across on-premise environments, AWS, Azure, and Oracle Cloud using Kubernetes / Conductor, Docker, and GitLab CI / CD pipelines with a strong focus on scalability and resilience.
  • Innovation

  • Contribute to designs that apply new frameworks to improve systems and processes.
  • Evaluate current-state tax technology ecosystem and help define target-state tax architecture in partnership with architects and product managers.
  • Explore opportunities to apply automation and advanced analytics including AI / ML techniques where appropriate to optimize tax workflow orchestration,
  • Technical Leadership

  • Collaborate with technical teams and apply system expertise to deliver technical solutions.
  • Continuously learn and teach others existing and new technologies.
  • Act as a founding engineer for Tax Technology, setting coding standards and engineering practices for future hires.
  • Technology Strategy

  • Contribute to new and existing technology options that support business goals.
  • Understands current technology that supports business goals.
  • Ensure tax platform design aligns with enterprise multi-cloud strategy, DevOps practices, security standards, and long-term scalability.
  • Education and Work Experience :

  • Bachelor's Degree plus 5 years of related work experience OR Advanced degree with 3 years of related experience (Required)
  • Acceptable areas of study include Computer Science, Software Engineering, Information Management or equivalent experience in field (Required)
  • 4-7 years Technical engineering experience. (Required)
  • Preferred Qualifications :

  • Familiarity with Vertex O-Series or Vertex Edge indirect tax engines.
  • Background in the telecommunications industry, especially billing systems and telecom taxation.
  • Familiarity integrating indirect tax engines (e.g., Vertex O-series) into high volume telecom billing environments with complex jurisdictional rules
  • Experience designing and implementing orchestration layers for sophisticated business workflows.
  • Familiarity with rules engines or policy-driven logic frameworks.
  • Experience in applying AI / ML to enhance workflow automation, monitoring, and performance optimization.
  • Prior experience in small, high-impact teams or as an early hire in a new function a strong plus.
  • 7+ years Technical engineering experience (Required)
  • 7+ years of professional software development experience (Required)
  • Experience with SQL Server (AWS RDS), database design, and integration.
  • Hands-on experience with cloud-native and hybrid deployments across AWS, Azure, Oracle Cloud, and on-premise environments.
  • Experience with container orchestration using Kubernetes / Conductor and CI / CD pipelines in GitLab.
  • Knowledge, Skills and Abilities :

  • Strong proficiency with .NET Core / 6 / 7 backend development and Angular front-end frameworks.
  • Exceptional communication skills, with the ability to clearly explain technical concepts to non-technical partners.
  • Strong ownership and accountability, with a track record of driving projects independently to completion.
  • Ability to thrive in ambiguous environments, creating clarity and structure where none exists.
  • Experience mentoring engineers, setting coding practices, or establishing scalable processes preferred.
  • At least 18 years of age
  • Legally authorized to work in the United States
  • Travel :

    Travel Required (Yes / No) : Yes

    DOT Regulated :

    DOT Regulated Position (Yes / No) : No

    Safety Sensitive Position (Yes / No) : No

    Base Pay Range : $113,600 - $205,000Corporate Bonus Target : 15%

    The pay range above is the general base pay range for a successful candidate in the role. The successful candidate’s actual pay will be based on various factors, such as work location, qualifications, and experience, so the actual starting pay will vary within this range.

    At T-Mobile, employees in regular, non-temporary roles are eligible for an annual bonus or periodic sales incentive or bonus, based on their role. Most Corporate employees are eligible for a year-end bonus based on company and / or individual performance and which is set at a percentage of the employee’s eligible earnings in the prior year. Certain positions in Customer Care are eligible for monthly bonuses based on individual and / or team performance. To find the pay range for this role based on hiring location, ;paradox=1

    At T-Mobile, our benefits exemplify the spirit of One Team, Together! A big part of how we care for one another is working to ensure our benefits evolve to meet the needs of our team members. Full and part-time employees have access to the same benefits when eligible. We cover all of the bases, offering medical, dental and vision insurance, a flexible spending account, 401(k), employee stock grants, employee stock purchase plan, paid time off and up to 12 paid holidays - which total about 4 weeks for new full-time employees and about 2.5 weeks for new part-time employees annually - paid parental and family leave, family building benefits, back-up care, enhanced family support, childcare subsidy, tuition assistance, college coaching, short- and long-term disability, voluntary AD&D coverage, voluntary accident coverage, voluntary life insurance, voluntary disability insurance, and voluntary long-term care insurance. We don't stop there - eligible employees can also receive mobile service & home internet discounts, pet insurance, and access to commuter and transit programs! To learn about T-Mobile’s amazing benefits, check out

    Never stop growing!

    As part of the T-Mobile team, you know the Un-carrier doesn’t have a corporate ladder–it’s more like a jungle gym of possibilities! We love helping our employees grow in their careers, because it’s that shared drive to aim high that drives our business and our culture forward. By applying for this career opportunity, you’re living our values while investing in your career growth–and we applaud it. You’re unstoppable!

    T-Mobile USA, Inc. is an Equal Opportunity Employer. All decisions concerning the employment relationship will be made without regard to age, race, ethnicity, color, religion, creed, sex, sexual orientation, gender identity or expression, national origin, religious affiliation, marital status, citizenship status, veteran status, the presence of any physical or mental disability, or any other status or characteristic protected by federal, state, or local law. Discrimination, retaliation or harassment based upon any of these factors is wholly inconsistent with how we do business and will not be tolerated.

    Talent comes in all forms at the Un-carrier. If you are an individual with a disability and need reasonable accommodation at any point in the application or interview process, please let us know by emailing -mobile.com or calling 1-844-873-9500. Please note, this contact channel is not a means to apply for or inquire about a position and we are unable to respond to non-accommodation related requests.

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