About Us
We are an early-stage fintech startup (not rebuilding but) re-wiring the global payments infrastructure. Today, sending money across borders is slow, expensive, and fragmented. We're here to fix that—making instant cross-border payments a reality. We’re an early-stage fintech startup, backed by industry insiders, with deep experience in the financial ecosystem. We’re building from zero—no tech debt, no legacy systems. Just a clean slate, strong vision, and higher standards. Now we’re looking for a founding backend engineer to join us at the ground level and help bring this platform to life.
The Role
* You’ll work directly with the founders to design, build, and launch our core platform
* This is a hands-on, high-impact role: you'll write code daily, influence key architectural decisions, and ship fast using modern tools and AI.
* Build a modern backend from scratch in C#/.NET 8 with a clean, event-driven architecture
* Help architect a scalable system using CQRS, Event Sourcing, DDD, microservices
* Own key components in AWS: Lambda, SQS, SNS, DynamoDB, PostgreSQL, API Gateway
* Work in a test-first, high-trust environment with real autonomy
What we're after
* You work incredibly hard, have high agency and take pride in what you do
* You (love using) use AI to design, code, debug, and ship (way) faster (if you think AI is a nuisance, this is not for you)
* You are comfortable building backend APIs, front-end web apps, DevOps and systems integrations. Whatever comes your way.
* C# is a must. React nice to have. The rest you can learn
Desirable
* You like the idea of becoming a start-up Founder one day
* Comfort with cloud-native infrastructure (preferably AWS)
* Background in payments & fintech
* Strong grasp of enterprise architecture patterns (DDD, CQRS, microservices)
What we're after:
* Opportunity to join at the early stage and build the world's first instant and open payments network
* You’ll work directly with the founder to design, build, and launch our core platform
* You will be working at the bleeding edge of AI development within an enterprise environment
* Hands-on, high-impact role: you'll write code daily, influence key architectural decisions, and ship fast using modern tools and AI
Why Join Us?
* Build from 0 to 1: You’ll shape the architecture, team, and product from day one
* Real ownership: You won’t be a cog—you’ll be a core part of the company’s foundation
* Mission-driven: Help reinvent a critical piece of global financial infrastructure
* Equity upside: Generous options in what we believe can be a generational fintech company
* Work with intensity and purpose, in-person with a small team of true builders in London
Why you shouldn't join
* Expectations are incredibly high
* You’re looking for a comfy job with a 40 hour a week commitment with predictable hours and minimal pressure
* You don't see the value in using AI to enhance engineering teams
Logistics
* Location: In-person in London 5 days a week with some flexibility
* Compensation: Competitive salary + high-equity package
To apply please send 1) your CV, 2) a quick note on why you want to join and 3) how you are using AI today to hello [at] 3degrees [dot] co
No visa sponsorship of any kind at this point.