Principal Full Stack Engineer

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

• 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.
• 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.
• 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.

Additional Information

• This is a full-time position with competitive salary, share options, and benefits.
• Ideal Start date: March 2026 (we are aware that a notice period may need to be fulfilled and can adjust accordingly).
• Capi is an equal opportunity employer and welcomes candidates from diverse backgrounds. We’re all about building a diverse, inclusive team at Capi.