Senior Backend Engineer (Python or OOP)

E-Frontiers – We help top tech talent find opportunities in leading product and scale‑up companies across Europe. We make sure candidates have a great experience and get the information they need to make the best career decisions.

We are currently working with a fast‑growing international fintech , seeking a Senior Backend Engineer to join their core systems team. This is a key role where you’ll work on the platform’s multi‑currency accounting and FX systems – the backbone of the product.

What you’ll do:

• Develop and maintain scalable, reliable backend systems that power key financial operations.
• Design new services and improve existing ones, tackling both microservices and legacy code.
• Collaborate with product and engineering teams to deliver initiatives end-to-end.
• Mentor colleagues and contribute to the overall technical growth of the team.
• Take full ownership of the services you buil...