Full Stack Engineer (Senior) - Fintech / B2B

EMEA (APAC Expansion) | HQ: EU
Competitive: Base + Equity + Bonus

Our client is a fintech building the infrastructure that moves data reliably at scale. If you want to be part of a Regional business that operates lean fast, and product-led — engineers here own outcomes, not tickets.

We're hiring a Senior Backend Developer to own core services end to end, not just ship features within someone else's system.

What you'll own
Design, build, and own backend services — you're accountable for their reliability, performance, and maintainability, not just the code you commit
Make architectural decisions in your domain and drive technical direction for your squad without needing to be told what to build
Ship to production continuously — we review PRs same-day and value velocity over process
Raise the bar around you: mentor mid-level engineers, run design reviews, and push back on bad technical calls with evidence and alternatives
Own your services in production, including on-call for your area

What we're looking for
5+ years of backend engineering, with a track record of owning a service or system end to end (not only features within one built by others)
Strong Python (or a comparable backend language you can point to in production)
Solid AWS and distributed-systems fundamentals — you've designed for scale and can talk through the trade-offs you made
You've made architectural decisions the team actually adopted, and you can explain why
Clear communicator — you can articulate technical decisions to non-technical stakeholders
Preferred industry background:

fintech, B2B infrastructure, payments, prediction markets or another high-reliability, data-intensive domain. If you've worked where speed and precision genuinely matter, that's what we're after.

Nice to have
Experience in a consumer or B2B product company at meaningful scale
AI-native workflow — you use AI tools in your day-to-day and have shipped or experimented with AI-powered features
Exposure to event-driven architectures, high-throughput data pipelines, or financial-grade systems

Why this role
Real ownership from day one — this is a genuine senior IC seat, not a feature factory
A high-trust, low-bureaucracy engineering culture where the best technical argument wins
Work that has to be correct, which makes it interesting