Staff Full Stack Engineer

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.
• 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.
• (Desirable) Speak and write in French & English.
• (Desirable) Experience in Fintech, payments, wallets or building ledgers.
• (Desirable) Expertise in security and data protection best practices needed in a FCA regulated business.

What the job involves

• 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.
• Lead by technical example — your influence comes from the quality of your work, your judgment and your ability to bring others along with you, not from authority.
• Own technical direction within your team and workstream, collaborating closely with principal engineers and the Head of Engineering to align with broader architectural strategy.
• Mentor senior engineers through pairing, code reviews and design discussions — raising the technical floor of the people around you.
• Champion engineering best practices across the team, introducing standards and patterns that improve consistency, reliability and developer experience.
• Act as a subject matter expert in your core technical domain, and be the person others turn to when the problem is hard.
• Lead the end-to-end delivery of complex, multi-stakeholder projects — from scoping and design through to deployment, feedback and iteration.
• Translate ambiguous problem spaces into clear technical plans, breaking down large initiatives into well-defined milestones that the team can execute against.
• Manage delivery dependencies across teams and communicate progress clearly to both technical and non-technical stakeholders.
• Drive a culture of outcome-oriented delivery within your workstream — focused on impact shipped, not activity completed.
• Proactively identify and remove blockers before they slow the team down.
• Take ownership of the reliability and observability of systems within your domain — ensuring they are monitored, well-understood and resilient to failure.
• Handle production incidents with confidence, leading postmortems that result in genuine process improvements rather than just documentation.
• Set the standard for what good operational practice looks like within your team — monitoring, alerting, runbooks and on-call hygiene.
• Contribute to company-wide reliability initiatives led by principal engineers and the Head of Engineering.
• Make and defend strong architectural decisions within your workstream, balancing pragmatism with long-term technical health.
• Write production-quality code consistently — this is a fully IC role and hands-on technical contribution is expected at all times.
• Drive scalability, modularity and performance improvements in the areas of the codebase you own.
• Champion code quality through rigorous testing, thoughtful documentation and constructive code reviews that develop the engineers around you.
• Proactively identify technical debt and lead initiatives to address it before it compounds.
• Communicate internally and externally about new features, be it collecting feedback pre-implementation or explaining them on launch.

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.