Hybrid TypeScript Backend Engineer – Banking API

• Holidays : 25 days + RTT ️

About Swan is Europe’s embedded banking specialist. We empower software companies to embed banking features like accounts, cards, and payments directly into their products, under their own brand.Swan processes over €1.5 billion in monthly transactions for more than 150 companies—like Pennylane, Indy, Agicap, Libeo, and Lucca. Founded in 2019, the company has received growth capital from leading investors such as Lakestar, Accel, Creandum, Bpifrance and Eight Roads. Swan is a principal member of Mastercard and a licensed financial institution, regulated by the French banking authority (ACPR).Our missionBanking belongs in business softwareMany software companies already serve small businesses incredibly well: helping them send invoices, run payroll, manage inventory, and more. They’re on a mission to become the central hub for managing every aspect of business life.But when it comes to financial workflows, there’s still a gap. Too many critical tasks like managing cash flow, tracking payments, or reconciling accounts happen outside the software, across spreadsheets, email threads, banking portals.It’s a missed opportunity. Business software shouldn’t just record financial activity — it should run it.To learn more about us : About Swan ; Our story .Job DescriptionSwan is looking for a Confirmed Software Engineer to join is tech team of 70+ people for a specific project over a few months.The Engineering team is by far the largest at Swan. 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

Preferred experience ✨ You’re a great match if:

• Experience: from 3 years as a Software Developer with a strong grasp of back-end systems
• You have mastery of common back-end improvement topics (performance improvements, observability, database queries (SQL) and SQL optimizations)
• Technical Skills: Proficient in TypeScript
• Hands-on experience with automated testing & CI/CD
• Experience in distributed systems or micro-service architecture
• You regularly follow technological improvements to keep abreast of the latest developments in your technological ecosystem (via newsletters, by attending conferences or watching meetups, for example).
• Passionate about functional programming & open source
• Fluent in English
• Our ideal teammate: Empathetic. Skilled. Frank. We love to challenge each other, and we leave our egos at the door.

It’s okay if you don’t tick all the boxes — don’t let imposter syndrome prevent you from applying!