Freelance Software Engineer - Backend TypeScript

Swan is looking for a Freelance Software Engineer to join our Banking Experience team.

The Engineering team is by far the largest at Swan (70+ people). This team includes Software developers, who build payments and end-customer applications, as well as Infrastructure, DevOps, QA, and Security.

We build with intent, focusing on solving real problems that matter. In a regulated environment, compliance, security, and resilience are at our core. We value ownership, open collaboration, and a shared vocabulary to keep complexity manageable. Simplicity is key, clean, maintainable code wins over clever tricks. We ship fast, learn continuously, and always strive for excellence.

Your mission

• You will be technically responsible for one or more projects.
• You will have the opportunity to solve problems in one of the most demanding IT domains with a reactive architecture.
• You will design with the product team the bank by API.
• You will improve the performance of a system with a rapidly growing load.
• You will ensure the respect of the architecture rules and of the automated tests

Our technical environment

• NodeJS ;TypeScript ;GraphQL ;PostgreSQL ;Kafka ;Docker ;K8S ;AWS

You're a great match if:

• Experience: at least 5 years as a Software Developer with a strong grasp of back-end systems and proficiency in TypeScript.
• Backend Engineering: good mastery of common back-end optimization topics (performance improvements, observability, SQL database queries, and query optimizations).
• DevOps & Architecture: hands-on experience with automated testing, CI/CD, and exposure to distributed systems or micro-service architectures.
• Continuous Learning: you regularly follow technological improvements to keep abreast of the latest developments (newsletters, conferences, meetups).
• Mindset: fluent in English, passionate about functional programming or open source, and you leave your ego at the door.
• Bonus points / If you are ready to bring Senior ownership:
  • Product & Project Leadership: you have a proven track record of driving impactful projects from A to Z alongside Product teams, and you have the communication skills to confidently argue and advocate for your technical choices.
  • Architecture & Scale: you are used to dealing with high-complexity systems, naturally designing code with long-term scalability, clean architecture, and maintainability in mind.

Swan is committed to providing a caring work environment for all employees, regardless of age, sex, disability, sexual orientation, race, religion, or belief.

When it comes to recruitment, we're interested in your work experience, skills, and overall personality. Because diversity makes the workplace stronger and is necessary for Swan's success, we are intensifying efforts to incorporate concrete actions to help us improve in this area.