Staff Backend Engineer | JVM

About Addi We are a leading financial platform, building the future of payments, shopping, and banking—a world where consumers and merchants can transact effortlessly and grow together. Today, we serve over 3.6 million customers and partner with more than 55,000 merchants, making Addi Colombia’s fastest-growing marketplace. With a state-of-the-art, technology-first approach, we provide banking solutions (deposits, payments, unsecured credit) and commerce services (e-commerce, marketing), bridging the financial gap for millions and redefining how people experience financial freedom. As the country’s leading Buy Now, Pay Later provider, we have secured regulatory approval to operate as a bank, unlocking even greater opportunities for our customers. In the past year, we have also achieved profitability, reinforcing the strength of our business model and our ability to scale sustainably. Our mission has earned the trust of world-class investors, including Andreessen Horowitz, Architect Capital, GIC, Goldman Sachs, Greycroft, Monashees, Notable Capital, Quona Capital, Union Square Ventures, Victory Park Capital, and more, who back our vision for the future. With their support, we are not just growing—we are transforming Latin America’s financial ecosystem and shaping the next generation to shop, pay, and bank in Colombia. But what truly sets us apart is how we build. We are a conscious company, driven by deep experience in scaling technology, services and products, and we live by our values every day.   About the Role This is where you come in. Below, you’ll find what this role is all about—the impact you’ll drive, the challenges you’ll tackle, and what it takes to thrive at Addi. If you’re ready to be part of something big, keep reading.   What’s the mission you’ll drive As a Staff Backend Engineer, you will drive Addi’s backend technical direction, platform architecture, and engineering standards across squads. Your goal is to help every team build fast, securely, and AI-natively on systems that are ready to scale. Over the next 12 months, you will make sure the credit, payments, and marketplace services that our customers and allies across Latin America rely on stay reliable and secure as we grow, without having to rebuild the foundations along the way. This is an individual contributor role with company-wide technical leadership: you won’t manage people, but you will influence how many teams build.   What you will do Deliver at least one material business result in your domain, such as better payment success rates, faster and safer onboarding, a marketplace flow that converts more, or a faster delivery pipeline for every squad. Work with Product, Risk, and Growth to re-engineer the backend of our highest-volume revenue flows (credit decisioning and onboarding, ally checkout and payments, repayments and collections), so we cut latency, failed transactions, and manual workarounds and more people get approved and can pay without friction. Own the health of the platform you land in, end to end: reliability, scalability, performance, security, cost, and how easy it is to operate. Design and push adoption of shared foundations like service templates, shared libraries, messaging and event standards, and CI/CD and release practices, together with Platform/SRE and the squads that use them. Set and support SLOs and error budgets by service tier, lead root-cause analysis on the hardest production incidents, and help make sure the same problem doesn’t bite us twice. Turn our backend security and quality standards (authN/authZ, PII, OWASP/PCI, secrets and dependency scanning, contract and integration tests on key flows) into CI gates that every squad follows. Roll out our agentic coding setup ( AGENTS.md conventions, skills, spec templates, and CI gates for tools like Claude Code and Factory Droid) so every backend squad builds AI-natively and agent-written code ships safely. Shape the technical direction b