Backend Software Engineer (Python, API)

About The Companythree+one® is a leading public sector fintech firm dedicated to providing innovative liquidity and treasury solutions to a diverse range of public entities, including municipalities, counties, school districts, authorities, higher education institutions, and nonprofit organizations. Our mission is to simplify cash management, banking, and investment decisions by leveraging advanced technology and strategic partnerships. We serve as a trusted liquidity data partner, helping clients maximize the value of their cash assets through data-driven insights and solutions. Our core offerings include platforms such as cashVest®, a liquidity monitoring and forecasting tool; rfpPrep®, a digital procurement platform; and muniBank, a banking fee benchmarking system. With ongoing development of additional tools, we are committed to empowering public entities to uncover new income sources, achieve greater savings, and confidently invest more cash. Our work consistently results in increased earnings and more efficient cash utilization, with clients experiencing on average 30% higher earnings and 73% more cash confidently invested.About The RoleWe are seeking a motivated and skilled Backend Software Engineer to join our dynamic team and contribute to the growth of one of the nation's fastest-growing public sector fintech companies. In this role, you will be responsible for designing, developing, and maintaining scalable backend systems and APIs that support our financial data platforms. You will work closely with cross-functional teams, including product managers, designers, and frontend developers, to deliver robust and reliable solutions that enable public entities to make smarter financial decisions. This position offers the opportunity to work remotely, with occasional travel expected up to 5%. The ideal candidate is a self-driven professional with a passion for data-intensive application development, eager to grow into more advanced system design and architecture responsibilities over time. Reporting directly to the Chief Product and Technology Officer, you will play a key role in shaping the technical foundation of our products and services.QualificationsBachelor’s degree in Computer Science, Software Engineering, or related field.Minimum of five years of progressive software engineering experience.Proficiency in Python programming language.Experience in building and maintaining APIs.Familiarity with React, modern JavaScript/TypeScript, and UI development.Experience working with relational databases and version control systems (Git).Knowledge of CI/CD workflows and automation tools.Exposure to cloud platforms such as AWS, GCP, or similar.Understanding of containerization basics and infrastructure-as-code concepts.Experience in FinTech, banking, or financial systems is preferred.Knowledge of data processing workflows, including ETL processes.Experience with analytics or reporting systems.Exceptional attention to detail, time management skills, and the ability to handle multiple priorities independently.Growth mindset, receptive to feedback, and a strong desire to learn and adapt.ResponsibilitiesDesign, develop, and maintain scalable APIs and backend services to support our platforms.Manage financial and transactional data pipelines, ensuring accuracy, performance, and reliability.Enhance system observability, reliability, and overall performance metrics.Contribute to front-end features using React and assist in connecting backend systems to intuitive UI components.Own features from conception through deployment, collaborating with senior engineers and cross-functional teams.Translate product requirements into effective technical solutions and implementations.Write clean, maintainable, and well-tested code adhering to best practices.Participate in code reviews, technical discussions, and knowledge sharing activities.Work closely with product, design, and engineering teams to deliver cohesive user experiences.Ensure backend logic is correct, consistent, and auditable, especially when handling structured financial and time-series data.Contribute to improving development workflows, standards, and documentation.BenefitsCompetitive salary and comprehensive benefits package including health, dental, and vision insurance.Basic life insurance and short-term disability benefits.401(k) retirement plan with company contributions.Flexible paid time off, sick leave, and paid holidays to support work-life balance.Cell phone reimbursement and other employee-centric perks.Opportunities for professional growth and development within a fast-paced, innovative environment.Equal Opportunity & Fair Chance Hiringthree+one® is an Equal Opportunity Employer. We are committed to fostering an inclusive workplace and consider all qualified applicants without regard to race, color, religion, sex, national origin, disability, veteran status, or any other characteristic protected by applicable law. We also evaluate qualified applicants with arrest or conviction records in accordance with the California Fair Chance Act and other relevant regulations.