Backend Software Engineer

Role Description

We're seeking a driven Backend Software Engineer to help grow one of the nation's fastest-growing public sector fintech firms. As a Software Engineer, you'll be instrumental in building and scaling the platform infrastructure that helps public entities across the country make smarter, more confident financial decisions. This role is ideal for a self-motivated, goal-oriented individual who enjoys working with data-intensive applications, and is looking to grow into more advanced system design and architectural responsibilities over time. This position will report to the Chief Product and Technology Officer and will be fully remote. Travel is expected to be up to 5%.

Responsibilities

• Backend Development
  • Design, build, and maintain scalable APIs and backend services.
  • Work with financial and transactional data pipelines, ensuring accuracy and performance.
  • Improve system reliability, observability, and performance.
• Full-Stack Contribution
  • Contribute to front-end features using React when needed.
  • Collaborate with designers and product to deliver cohesive user experiences.
  • Help connect backend systems to intuitive, performant UI components.
• Feature Development & Delivery
  • Own features from design through deployment with guidance from senior engineers.
  • Translate product requirements into technical implementations.
  • Write clean, maintainable, and well-tested code.
• Collaboration & Code Quality
  • Participate in code reviews and technical discussions.
  • Work closely with product, design, and other engineers.
  • Contribute to improving development workflows and standards.
• Data & Systems Thinking
  • Work with structured financial datasets and time-series data.
  • Ensure correctness, consistency, and auditability of backend logic.

Qualifications

• Bachelors degree plus minimum five years work experience.
• Minimum 3–5 years of relevant and progressive software engineering experience.
• Demonstrated proficiency in Python.
• Proven ability to build and maintain APIs.
• Familiar with React, modern JavaScript/TypeScript, and the ability to contribute to UI features.
• Experience with relational databases and version control (Git), CI/CD workflows.
• Exposure to cloud platforms (AWS, GCP, or similar) and containerization basics.

Additional Skills and Abilities

• Experience in FinTech, banking, or financial systems.
• Familiarity with data processing or ETL workflows.
• Exposure to infrastructure-as-code tools.
• Experience working with analytics or reporting systems.
• Exceptional attention to detail, time management, and the ability to manage multiple priorities independently.
• Growth-oriented mindset with the ability to accept and act on feedback constructively.
• Eager to learn, results-driven, and adaptable.

Application Timeline

We anticipate the application window for this opening will close on: June 5th, 2026. Submission does not guarantee selection, and three+one reserves the right to modify or cancel the hiring process at any time. Only shortlisted candidates will be contacted. We’ll retain all applications for future consideration. Selected candidates will be asked to participate in a technical coding exercise as part of the interview process to demonstrate technical proficiency and reasoning.

Benefits

• Competitive salary and benefits (Health, Dental, Vision, Basic Life, SDBL)
• 401K Plan
• Flexible PTO, sick leave, and paid holidays
• Cell phone reimbursement

Equal Opportunity & Fair Chance Hiring

three+one is an Equal Opportunity Employer. We consider all qualified applicants without regard to race, color, religion, sex, national origin, disability, veteran status, or any other characteristic protected by applicable law. Qualified applicants with arrest or conviction records will be considered in accordance with applicable laws, including the California Fair Chance Act.

ADA Accommodation Statement

three+one is committed to providing reasonable accommodations throughout the hiring process. If you require an accommodation, please indicate this in your application or reach out through our general contact form.