Backend Software Engineer

three+one provides liquidity and treasury solutions to public entities, and they are seeking a driven Backend Software Engineer to help grow their platform infrastructure. The role involves building scalable backend services and contributing to front-end features, while ensuring the accuracy and performance of financial data pipelines.

Responsibilities:

• 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
• 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
• Own features from design through deployment with guidance from senior engineers
• Translate product requirements into technical implementations
• Write clean, maintainable, and well-tested code
• Participate in code reviews and technical discussions
• Work closely with product, design, and other engineers
• Contribute to improving development workflows and standards
• Work with structured financial datasets and time-series data
• Ensure correctness, consistency, and auditability of backend logic

Requirements:

• 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
• 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