Quantum Software EngineerInfleqtion • Chicago, IL, US
Quantum Software Engineer
Infleqtion • Chicago, IL, US
[job_card.30_days_ago]
[job_preview.job_type]
- [job_card.full_time]
[job_card.job_description]Bachelor’s degree in computer science, engineering, physics or a directly related field High proficiency in programming, with fluency in Python preferable. Proficiency in alternative languages (e.g. C / C++ or Julia) with the ability to rapidly upskill in Python Experience with open-source quantum software frameworks such as Cirq or Qiskit; Ideal candidates will have experience not only using these libraries but also modifying them Demonstrated ability to work and communicate with all levels of an organization; Professional-level communication skills, including verbal, written, and presentation skills Demonstrated ability to work comfortably in a highly collaborative, cross-functional, team-oriented, and matrixed environment Desire and demonstrated ability to thrive and produce results in a fluid, dynamic, and fast-paced environment Demonstrated ability to learn new and complex topics quickly Resourceful problem-solver who collaboratively identifies effective paths forward with demonstrated expertise in executing productization efforts Passion for solving complex problems and challenges in a highly technical and scientific environment Ability to be in the office any three days per week Ability to travel domestically and (potentially) internationally up to 10% PhD in quantum computation, physics, computer science, or a directly related field Familiarity with concepts in quantum computing such as error correction / fault tolerance, native gate decomposition, qubit mapping and routing, and variational quantum algorithms Experience with advanced open-source quantum software frameworks such as Stim Familiarity with best practices of professional software engineering such as coverage, integration tests, type checking, unit tests, and version control Experience with backend development with tools such as FastAPI for web frameworks and PostgreSQL / SQLAlchemy for databases Experience with cloud development, especially on GCP and AWS Familiarity with CI / CD, automated actions, issue tracking, version control, and other features on GitHub Familiarity with security core best-practices such as access control, encryption at rest, key rotation, and logging Exposure to or interest in front-end / GUI development, e.g., HTML / CSS, React, PyQt. Salary range : 120,000 to 150,000 USD / year 100% company-paid medical, dental, vision, short / long-term disability Employer-funded Health Savings Account Unlimited PTO 401(k) match Company-paid Life and AD&D Insurance Flexible Savings Account Paid FMLA, Maternity / Paternity Leave Employee Assistance Program Student Loan Repayment Equity Program
Job Description
Job Description
Position Summary
This Quantum Software Engineer role will join the Compiler Team within Infleqtion’s Quantum Software organization. This role will be responsible for designing, building, and maintaining quantum compilation software alongside considerable involvement in co-design efforts that span the full quantum stack, including applications, algorithms, hardware and control. This role combines hands-on coding, code review, and system design with R&D. Ideal candidates have a strong software development background and familiarity with quantum computation.
This role is open to both entry-level and senior-level candidates.
Job Responsibilities
The duties and responsibilities outlined below include essential functions of the role. Depending on business needs, this role may perform a combination of some or all of the following duties. Duties, responsibilities, and activities may change, or new ones may be assigned.
- Conduct R&D toward cutting-edge advances in quantum technology with a focus on quantum compilation, similar to work described in https : / / arxiv.org / abs / 2309.05157 and https : / / arxiv.org / abs / 2509.13247
- Deploy software optimizations to our cloud platform Superstaq using industry-grade software engineering procedures including documentation, linting, testing, and type-checking
- Interface with customers of Superstaq to understand their needs and support them in a timely fashion
- Contribute to development of government and commercial proposals and execution on global programs
- Collaborate with experimental physicists and software engineers to bridge the gap between theoretical concepts and practical implementation
- Engage with the broader scientific community by publishing research findings in scientific journals and presenting at conferences
- Stay up to date with the latest developments in quantum computer architecture, quantum compilation and related fields
- Provide guidance and support to other team members, fostering a collaborative research environment
Requirements
Preferred Qualifications
Our team will begin reviewing applications on January 20, 2026 and will continue until the position is filled.
Benefits
Benefits
[job_alerts.create_a_job]
Quantum Software Engineer • Chicago, IL, US
[internal_linking.similar_jobs]
We’re looking for a technically sharp, self-driven Quant Developer to join our client’s fast‑paced trading team.This role involves hands‑on research, model development, and system integration—ideal...[show_more]
This range is provided by Coinflow.Your actual pay will be based on your skills and experience — talk with your recruiter to learn more.
Coinflow is a next-generation payments company headquartered ...[show_more])
Clearwater Analytics is the leading SaaS platform for investment accounting, risk, and performance.We serve some of the world’s largest insurance companies, hedge funds, asset managers, and institu...[show_more]
At Relativity, we build technology that helps people uncover the truth in complex data.Our software (SaaS) empowers legal professionals, governments, and organizations around the world to navigate ...[show_more]
Coinflow is a next-generation payments company headquartered in Chicago, pioneering the way money moves globally.We enable merchants and marketplaces to accept payment methods across 170+ countries...[show_more] A forward-thinking fintech company in Chicago is seeking a Senior Software Engineer to design and implement core payment infrastructure for global transactions.
In this high-impact role, you will bu...[show_more] 
A leading financial technology firm in Chicago is seeking talented developers to build low-latency trading systems and infrastructure.
The role involves developing quantitative libraries and optimiz...[show_more] Build low-latency trading systems and infrastructure.Develop quantitative libraries and research platforms.Optimize execution algorithms and risk systems.
Financial markets and trading systems knowl...[show_more] 
A financial sector company is looking for a Quantitative Developer to enhance their trading and risk management capabilities.
The ideal candidate should possess over 2 years of experience, demonstra...[show_more]
A fintech solutions provider is seeking a Senior Software Engineer to shape the future of global payments.You will design and implement high-throughput payment processing systems, build APIs, and d...[show_more]
A leading payment technology company in Chicago is seeking a Senior Software Engineer to design and implement infrastructure for processing billions in transactions.
This role involves building reli...[show_more]
This Quantum Software Engineer role will join the Compiler Team within Infleqtion’s Quantum Software organization.This role will be responsible for designing, building, and maintaining quantum comp...[show_more] A financial technology firm is seeking a Quantitative Finance Recruiter in Chicago or remote, focused on connecting top-tier developers with leading prop trading firms.
The role includes building lo...[show_more] We are seeking self-motivated, energetic individuals with exceptional problem-solving and technical skills to help drive our.
We break down barriers between disciplines, stepping in wherever we can ...[show_more] 
PsiQuantum'smission is to build the first useful quantum computers-machines capable of delivering the breakthroughs the field has long promised.
Since our founding in 2016, our singular focus has be...[show_more] At Relativity, we build technology that helps people uncover the truth in complex data.Our software (SaaS) empowers legal professionals, governments, and organizations around the world to navigate ...[show_more] Coinflow is a next-generation payments company headquartered in Chicago, pioneering the way money moves globally.We enable merchants and marketplaces to accept payment methods across 170+ countries...[show_more] 
A company in the financial sector is seeking a Quantitative Developer in Chicago to design, implement, and optimize quantitative models for trading and risk management.
This role requires strong pro...[show_more]
Quantitative Developer
OP Recruiting • Chicago, IL, United States
[job_card.full_time]
[last_updated.last_updated_30] • [promoted]
Senior Software Engineer
Coinflow • Chicago, IL, United States
[job_card.full_time]
[last_updated.last_updated_variable_days] • [promoted]
Quantitative Developer - Commodities
Clearwater Analytics (CWAN) • Chicago, IL, United States
[job_card.full_time]
[last_updated.last_updated_variable_days] • [promoted]
Senior Software Engineer
Relativity • Chicago, IL, United States
[job_card.full_time]
[last_updated.last_updated_30] • [promoted]
Senior Software Engineer
SOLANA FOUNDATION • Chicago, IL, United States
[job_card.full_time]
[last_updated.last_updated_variable_days] • [promoted]
Senior Software Engineer, Global Payments Platform
SOLANA FOUNDATION • Chicago, IL, United States
[job_card.full_time]
[last_updated.last_updated_variable_days] • [promoted]
Low-Latency Quant Developer
Fionics • Chicago, IL, United States
[job_card.full_time]
[last_updated.last_updated_variable_days] • [promoted]
Quantitative Developer
Fionics • Chicago, IL, United States
[job_card.full_time]
[last_updated.last_updated_30] • [promoted]
Quantitative Developer : Low-Latency Trading & Systems
Motion Recruitment Partners LLC • Chicago, IL, United States
[job_card.full_time]
[last_updated.last_updated_variable_days] • [promoted]
Senior Software Engineer, Global Payments Platform
Pagos Consultants • Chicago, IL, United States
[job_card.full_time]
[last_updated.last_updated_variable_days] • [promoted]
Senior Software Engineer — Global Payments Infrastructure
Coinflow Labs Limited • Chicago, IL, United States
[job_card.full_time]
[last_updated.last_updated_variable_days] • [promoted]
Quantum Software Engineer
Infleqtion • Chicago, IL, US
[job_card.full_time]
[filters_job_card.quick_apply]
[last_updated.last_updated_30]
Low-Latency Quant Developer (Remote / Chicago)
Fionics • Chicago, IL, United States
[filters.remote]
[job_card.full_time]
[last_updated.last_updated_30] • [promoted]
Sr Software Engineer
Infleqtion • Chicago, IL, US
[job_card.full_time]
[filters_job_card.quick_apply]
[last_updated.last_updated_variable_days]
Senior Software QA Engineer
PsiQuantum • Chicago, IL, United States
[job_card.full_time]
[last_updated.last_updated_30] • [promoted]
Advanced Software Engineer
Relativity • Chicago, IL, United States
[job_card.full_time]
[last_updated.last_updated_30] • [promoted]
Senior Software Engineer
Coinflow Labs Limited • Chicago, IL, United States
[job_card.full_time]
[last_updated.last_updated_variable_days] • [promoted]
Low-Latency Quant Developer for Trading - Stock Options
Motion Recruitment • Chicago, IL, United States
[job_card.full_time]
[last_updated.last_updated_variable_days] • [promoted]