Founding Elixir Engineer - Building Innovative Fintech

Job title: Founding Elixir Engineer – Building Innovative Fintech

Important: if you are a talented experienced Team Lead, please, apply, we are open to grow together

Salary range: Competitive salary + meaningful equity (funded late seed, preparing for launch in Q1 2026)

Qualifications or experience required: 5+ years of working full-time as a software engineer (exceptions can be made for the right candidate)

Remote job: Yes

Remote restrictions: Europe (GMT +/– 2h)

Remote work or relocation as an employee to France/UK

The Opportunity

Join the founding engineering team building an innovative solution Empay for embedded finance market (B2B2C) across the UK & EU with further expansion to other regions. The market is just opening up – perfect timing to build something new & massive. If you've ever wanted to see your code become the core of a real fintech infrastructure – this is it.

This is a true 0→1 opportunity: no endless meetings — just a clear mission, a strong founding team, and full ownership.

The Founders

Built by proven entrepreneurs: Experienced team in fintech & banking (PWC, Solaris, SumUp, Visa, Sap) with successful exits. Together, we bring deep expertise in building and scaling billion-dollar fintech & banking companies.

The Role

We need a brilliant backend engineer to scale & build our core banking engine and payment infrastructure.

You'll Own:

• Creating payment integrations with UK & EU leading payment providers & Visa/Mastercard
• Designing and developing high-performance APIs for efficient request and data handling
• Building the data pipeline that turns financial data into instant compliance checks
• Maintain and scale Card issuing and loyalty platform
• Develop Payments functionality including routing, payment initiation and account management on Card issuing and loyalty platform
• Strong technical ownership for your tasks across all stages: understanding subject domain and requirements, solution design and architecture, integrations with internal and external services, software reliability and performance, testing, rollout and maintenance
• End-to-end software life cycle contribution including CI/CD, monitoring and alerts, production support of the solution
• Maintain strong collaboration with front-end development teams, Product and UX teams, and neighboring backends peers

Technical Challenges:

• Build for 100,000+ monthly transactions from day one
• Create a system that scales across multiple countries and currencies
• Design infrastructure that handles sensitive financial data securely

What We're Looking For

Must-Haves:

• Minimum 5–6 years building fintech/lending/banking backends (more experience is awesome!)
• Strong Elixir experience with production systems at scale
• Experience with UK/European open banking platforms / APIs (Salt Edge, Nordigen/GoCardless, Tink)
• Built high-throughput transaction processing systems
• Experience with PostgreSQL and data pipeline architecture
• Understanding of financial systems and risk decisioning

Huge Plus:

• Worked at companies like Revolut, Wise, Monzo, Curve, or any BNPL/lending fintech
• Built consumer products that scaled to 100k+ users
• Experience with UK & EU payment systems
• Former founding engineer who's seen 0→1 journey

What You Get

• Own the core product – your code will process millions in payments monthly
• Founding engineer equity – real ownership in a rocket ship, not 0.01% options
• Direct line to founders – your ideas ship to production in days, not months
• Build your own empire – hire and lead the entire backend team as we scale
• Work with the best team of fintech & big marketing experts
• Massive social impact & new fintech category
• Shape the technical culture – define how we build, not follow someone else's playbook

Tech Stack

Backend: Elixir (modular monolith), PostgreSQL, Docker, Kubernetes

Infra & Monitoring: Grafana, Loki, Tempo, Prometheus

Cloud: DigitalOcean (potential transitioning to AWS)

Frontend: React / TypeScript / Next.js

Mobile: Flutter

Now backend is built on Elixir, but as a Founding Engineer you'll have the autonomy to evolve the stack – if a certain microservice calls for Go or Python, that's on the table.

Additional tech stack: React/TS/Next (Frontend); Flutter (Mobile).

Interview Process

Fast and transparent (total time: 1 week max):

• 30-min chat with founders (background + values & culture fit)
• Technical interview + short live coding
• Paid technical task (real problem we're solving)
• Final decision within 48 hours