Backend Engineer

About AddiWe 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 2 million customers and partner with more than 20,000 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 RoleThis 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 You Will DoTake e2e ownership and operate the software that you design, develop, test and release into production.Work closely with designers, engineers, and product owners to build great products and experiences for our clients and allies.Architect resilient and scalable components leveraging our architectural styles and patterns.Develop new features using our JVM stack.Develop unit/component/integration tests that guarantee the reliability of the features that you build.Review pull requests daily, transferring your knowledge to your team.Receive mentorship from everyone on the team - from more experienced members to junior folks who are just starting.Deploy new features to production daily using our CI/CD pipeline.Be on call occasionally. We rotate to distribute our knowledge and experience.Contribute to our Architecture Decision Records, where you will be able to propose new techniques, patterns, and tools for our evolving platform.What We're Looking ForProven software development experience 2 years of experience in backend development, specifically with JVM-based technologies such as Java, Kotlin, or Scala.Proven track record of delivering scalable, high-performance backend systems in a production environment.Experience working in software development teams, contributing to sprints, standups, and retrospectives.Strong Technical Proficiency Hands-on experience with backend languages (e.g., Java 11, Kotlin, Scala) and backend frameworks such as Spring BootProficiency in building and database management, like SQL (must), PostgreSQL, and Redis.Strong experience with automated testingStrong ability to design, implement, and maintain scalable and secure APIs.Knowledge of Kafka for handling event-driven systemsProficiency in CI/CD pipelines and deployment strategies.Nice to have: Proficiency in reactive programmingNice to have: Knowledge in containerization (Docker) and orchestration (Kubernetes).Adaptability and resilience in dynamic startup - product environments : Outstanding ability to thrive in a fast-paced, constantly changing environment, balancing immediate results with long-term strategic planning.Strong business acumen Deep understanding of business goals and how technical solutions align with and drive these objectives.Ability to prioritize work effectively to deliver the highest impact for users and stakeholders.Ideally, experience in fintech or product companiesOutstanding cross-functional collaboration Proven ability to collaborate effectively with product managers and designers to align technical solutions with user needs and business strategy.Demonstrates exceptional initiative Takes responsibility for delivering impactful projects end-to-end, from conception to post-deployment support.Deliver high-quality, creative solutions at lightning speed.Anticipated technical challenges and proposed effective backend solutionsWhy Join Us?Work on a problem that truly matters – We are redefining how people shop, pay, and bank in Colombia, breaking down financial barriers and empowering millions. Your work will directly impact customers' lives by creating more accessible, seamless, and fair financial services.Be part of something big from the ground up – This is your chance to help shape a company, influencing everything from our technology and strategy to our culture and values. You won't just be an employee—you'll be an ownerUnparalleled growth opportunity – The market we're tackling is massive, and we're growing faster than almost any fintech lender at our stage. If you're looking for a high-impact role in a company that's scaling fast, this is it.Join a world-class team – Work alongside top-tier talent from around the world, in an environment where excellence, ownership, and collaboration are at the core of everything we do. We care deeply about what we build and how we build it—and we want you to be a part of it.Competitive compensation & meaningful ownership – We believe in rewarding our talent. You'll receive a generous salary, equity in the company, and benefits that go beyond the basics to support your growth.How the Hiring Process Looks LikeWe believe in a fast, transparent, and engaging hiring experience that allows both you and us to determine if there's a great fit. Here's what our process looks like:Step 1: People Interview (30 min) A conversation with a recruiter to get to know you, your experience, and what you're looking for. We'll also share more about Addi, our culture, and the role.Step 2: Initial Interview (60 min) In this stage, we'll dive deeper into your technical background and problem-solving approach. You'll discuss how you apply good engineering practices, handle feedback, and reason through real challenges as part of a collaborative team.Step 3: Technical Challenge (6 Days) You'll receive a take-home challenge designed to understand how you think and code. We'll be looking for clean, well-documented, and functional work that demonstrates good practices, testing, and clear reasoning behind your decisions.Step 4: On-site Interview (60 min) You'll present your take-home exercise and walk us through your implementation. We'll discuss your design choices, testing, and error handling, while also exploring how you communicate your ideas and respond to feedback in real time.Step