Staff Full Stack Engineer (Java, React)

Staff Full Stack Engineer

Capi Money

Capi is building the financial infrastructure for emerging markets trade. 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. 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 100 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 Leadership Excellence * 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. Delivery Excellence * 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. Operational Excellence * 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. Technical Excellence * 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. 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: 1. 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 2. 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 3. Deep dive (1 hr) - Meet the hiring manager and explore your relevant experience and our upcoming projects 4. 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. 5. References 6. Offer! ADDITIONAL INFORMATION This is a full-time position with a competitive salary, share options, and benefits. We would be looking to hire for this role by June 2026, but are happy to align with notice periods as required. 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. We've won some cool awards recently too! Check them out: * Startups UK Top 100 (No. 24) * Viva Technology Top 100 * Welcome to the Jungle's Fintech's Finest Top 50

Staff Full Stack Engineer

Capi Money

Capi is building the financial infrastructure for emerging markets trade. 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. 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 100 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 Leadership Excellence * 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. Delivery Excellence * 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. Operational Excellence * 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. Technical Excellence * 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. 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: 1. 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 2. 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 3. Deep dive (1 hr) - Meet the hiring manager and explore your relevant experience and our upcoming projects 4. 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. 5. References 6. Offer! ADDITIONAL INFORMATION This is a full-time position with a competitive salary, share options, and benefits. We would be looking to hire for this role by June 2026, but are happy to align with notice periods as required. 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. We've won some cool awards recently too! Check them out: * Startups UK Top 100 (No. 24) * Viva Technology Top 100 * Welcome to the Jungle's Fintech's Finest Top 50

Staff Full Stack Engineer

tem

📈 Who We Are: We are rebuilding the energy transaction, making it transparent and fair. Our goal is to put power back where it belongs, in the hands of customers and to take on one of the most critical problems of our century, access to low cost electricity. tem exists to fix a broken global energy market that’s long favoured legacy operators, intermediaries, and opaque pricing. Today’s electricity system was not designed for rapid decarbonisation, AI-driven efficiency or fair access for the actual users - businesses and generators. We’ve built the first AI native transaction infrastructure to reinvent how electricity is bought, sold and priced. Our technology is designed to cut out the inefficient fees, automate complex market flows, and bring transparency and fairness to energy transactions at scale. In late 2025, after extraordinary growth, we closed a $75 million Series B - led by Lightspeed Venture Partners with participation from Albion, Atomico, Allianz, Hitachi Ventures, Hitachi Ventures, Schroders Capital and others - positioning us for global expansion, deeper product innovation and category leadership. We’re scaling internationally and building toward a future where AI-driven infrastructure is foundational to electricity markets worldwide. Since launch, our modern utility product, known as RED, has already facilitated thousands of business customers and billions in energy transaction value, proving that modern software and AI can transform an industry built on legacy systems. At tem, we’re not just building another energy company, we’re rearchitecting market infrastructure so that transparency, efficiency and sustainability become the default, not the exception. 🏅 THE ROLE: We’re looking for Staff Engineers to accelerate product delivery and enable scale across our customer acquisition, customer success and developer experience platforms. You’ll contribute through hands-on coding, drive architectural direction, and raise the technical bar across the team. In your first 12 months, you’ll lead the development of systems that redefine how brokers, customers, and internal teams interact with energy services - from real-time pricing workflows to intuitive self-serve tools. You’ll help us launch new products that streamline onboarding, improve service transparency, and lay the groundwork for rapid, sustainable growth. 🚀 RESPONSIBILITIES: * Build with impact: Architect and deliver end-to-end systems, from internal automation to customer-facing portals, ensuring they are scalable, fast, and user-friendly. * Own the platform: Improve and extend core platforms and developer tooling, making it easier for teams to build, test, and ship quality software. * Drive innovation: Rapidly prototype and iterate on new workflows and product ideas that expand our offering and improve the broker and customer journey. * Partner cross-functionally: Collaborate with Product Managers, Designers, and other Engineers to scope, design, and deliver high-impact solutions. * Raise the bar: Lead by example through code reviews, mentorship, and championing engineering best practices across the team. 🎯 REQUIREMENTS: Must-Haves: * Track record in fast-paced environments: Experience as a Senior or Staff Engineer in a high-growth startup or scale-up, with a strong bias toward shipping. * System design at scale: Proven ability to design and build complex systems that power both back-end automation and front-end experiences. * Modern tech expertise: Deep experience with Python, Node.js, and AWS serverless architecture (e.g., Lambda, API Gateway, DynamoDB). * Front-end capabilities: Skilled in developing responsive, performant front-ends using modern JavaScript frameworks such as React. * Product-minded mindset: Experience working closely with product and design teams to solve user problems, not just deliver features. * Can deal with ambiguity: Comfortable navigating changing priorities and incomplete information to make strong technical decisions. Desirable: * Exposure to the energy sector or other regulated industries. * Experience building internal tools or platforms for brokers, sales teams, or support agents. * Familiarity with real-time data processing or agentic/AI-driven systems. ✨ BENEFITS & PERKS: * Competitive salary - our current band for this role is £104,000 or equivalent in local currency. * We review salaries twice a year using real-time market data, with transparent, consistent pay for the same role and level. * Stock Options - everyone on the team has ownership in our mission. * 25 days holiday + public holidays - Swap public holidays for ones that matter most to you. Plus, get an extra day off for your birthday 🎉. * Remote & flexible working - We’re fully remote with clear core hours, and no internal meetings on Friday afternoons. * Home working & wellbeing budgets: * Up to £1,200 / €1,200 annually to upgrade your remote setup (co-working passes, equipment, etc.). * Up to £150 / €150 monthly on anything that supports your wellbeing - from therapy to gym memberships to meditation apps. 🗣️ INTERVIEW PROCESS: Our processes normally take around 2-3 weeks from first call to offer - please let us know about any adjustments to timelines that may be required. 1. First call with our Talent Team (30 Mins). This is to understand your experience, motivations, and discuss the role in more detail. 2. Behaviour Interview with our Engineering Managers (60 Mins). This is your chance to really understand the role, the expectations, and ensure alignment on ways of working. 3. Technical Interview with the Team (75 Mins). You’ll meet with potential peers in this session and will discuss technical topics and experiences. 4. Culture-Add Interview with Stakeholders (45 Mins). The final session will be with two cross-functional stakeholders, and will explore how your values align with ours, and is designed to be a genuine two-way conversation, your chance to understand what it’s really like to work at tem. We welcome applications from people of all backgrounds, experiences, and identities, including those that are traditionally underrepresented in the tech and energy sectors. If you’re excited about this role but not sure you meet every requirement, we’d still love to hear from you. Your unique perspective could be exactly what we’re looking for.