Principal Full Stack Engineer - Paris
At Capi, we help businesses in emerging markets pay their international suppliers - simply, quickly, and fairly.
Backed by $18M+ from top-tier investors like Creandum, Y Combinator, General Catalyst, and angels from Revolut, Checkout, Stripe, and Remitly, we’re building the financial infrastructure that emerging markets deserve.
By making global trade smoother and more accessible, we help local businesses grow faster, hire more people, and power prosperity across their communities.
Our mission is to grow GDP in emerging markets by making the global financial system fairer and more accessible. We’re tackling global trade, making it easier for importers to pay their international suppliers. Our platform enables businesses to expand rapidly, create jobs, and be engines of prosperity for their countries.
Our team is made up of approx 80 people across 10 countries; we are a group of a highly-ambitious, get-it-done people, who like to work hard on something that has a tangible impact in the world. And we’re looking for more people to join our team!
Take a look through Capi’s mission & values.
Role Overview
You’ll join a small, high-performing team of engineers and product leaders shaping how we scale our platform and our impact.
From your first day, you will have the opportunity to work closely with the founding team based across London & Paris to shape the product vision and all parts of our technical architecture. As we scale our products and deepen our presence across emerging markets, this is a role that builds technology to solve customer problems.
To do that, you must have empathy and curiosity to get to the root cause of the issue and the creativity to build a solution that balances impact, effort, and delight.
Key Responsibilities
Delivery
Contribute to the product process from end-to-end, from ideation to building the UI, backend logic, deployment, feedback and measurement
Communicate internally and externally about new features, be it collecting feedback pre-implementation or explaining them on launch
Define and manage delivery milestones, ensuring alignment between engineering and product priorities
Technical
Build intuitive and performant web interfaces for business owners in Africa
Implement IT security and data protection best practices in a regulated environment
Proactively drive architectural decisions e.g., improving scalability, observability, and modularity of the codebase
Champion code quality through robust testing, documentation, and reviews
Operational
Observe opportunities for improvements internally to help automate our non-tech processes and add to our tech best practices to improve our output and efficiency. Including handling production incidents with confidence
Leadership
Mentor junior engineers and contribute to their professional growth through pairing, reviews, and feedback
Represent engineering in cross-functional discussions (including Finance, Operations, Senior Leadership) to help translate business goals into technical plans
Set and uphold team standards for communication, collaboration, and technical excellence
Culture
Communicate internally and externally about new features, be it collecting feedback pre-implementation or explaining them on launch
Requirements
Our tech stack: Typescript, React, NextJS, NodeJS, Express, PostgreSQL
A product mindset is core to how we build - everyone at Capi is encouraged to think about the customer, the business, and the long-term impact of what we ship.
A strong understanding of web development, frontend and backend best practices. While mainly working with JavaScript technologies
Experience in a VC-backed or high-growth engineering team and building products used by customers.
You are comfortable working in an early-stage startup environment with high pace, rapid growth, involvement in the entire product development process, and a high degree of ambiguity
Excellent written and verbal communication skills for expressing ideas, designs, and potential solutions with both technical and non-technical team members and customers
You care about our mission and solving the problems faced by African businesses
Based in London or Paris
Bonus points if you:
Speak and write in French & English
Experience in Fintech, payments, wallets or building ledgers
Expertise in security and data protection best practices needed in a FCA regulated business
Some projects the team has been working on:
Automated payouts and AI invoice approval
Onboarding + payment automation with Swift network and banking partners across the world
WhatsApp bot that creates quotes for customers based on their responses
Self-serve onboarding flow that collects company information and KYC documents from customers
Asynchronous workers that OCR invoices
Internal tooling to manage and process millions of dollars of transactions
What to expect when interviewing with Capi?
Our interview process includes:
Screen interview with our Tech Recruiter Gracie (30 mins) - Learn about the Capi story and mission. Whilst ensuring we are aligned as an exciting opportunity for what you're looking for
Technical challenge with one of our Principal Engineers (1 hr) - Demonstrate your abilities in a whiteboard-style interview with one of our senior team members. We like to keep this as natural as possible, as if you were joining us tomorrow. This interview is to assess your skills, interests, and potential to see the impact you could make. While also ensuring Capi can support your growth
Deep dive (1 hr) - Meet the hiring manager and explore your relevant experience and our upcoming projects
Founder chat (30 mins) - Meet the founders to learn about Capi's growth plans, mission, and revenue targets. This is also your opportunity to ask any final questions to make sure our journey is right for you.
References
Offer!
Additional Information
This is a full-time position with competitive salary, share options, and benefits
Role is hybrid - 3 days per week in our office; currently in the 9th on Ave Trudaine
Ideal Start date: Q2 2026 (we are aware that a notice period may need to be fulfilled and can adjust accordingly)
Take a look at what it is like to work at Capi Money across all of our international offices.
Capi is an equal opportunity employer and welcomes candidates from diverse backgrounds. We’re all about building a diverse, inclusive team at Capi. Whoever you are, we’d love to hear from you. If there’s anything you need to make the interview process easier—whether it’s accessibility support, a different format, or just a heads-up about what to expect—just let us know, we’re happy to help.