Backend JVM Software Engineer | L3

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, grow together and where we create abundance and generate pride in them. Today, we serve over 2 million customers and partner with more than 20,000 merchants, making Addi Colombia’s fastest-growing marketplace.

We provide banking solutions (deposits, payments, unsecured credit) and commerce services (e-commerce, marketing) using state-of-the-art technology, 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

The backend software engineer will be responsible for designing, developing, and maintaining scalable and reliable solutions that support our both our business and technical objectives. Specifically, they will work within the Lending team, which is responsible for ensuring users can successfully make purchases through any of our journeys, using our instant payments product, or any of our lending ones. Over the next 12 months, this engineer will collaborate with product, business, and other engineering teams teams to integrate new features, improve system performance, and enhance the reliability of the services that enable seamless user transactions.

What you will do

• Take 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/automation tests that guarantee the reliability of the features that you build.

• Review pull requests on a daily basis transferring your knowledge with 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 on a daily basis 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 for

• Proven software development experience

  • 5 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 Boot

  • Proficiency in building and database management like SQL (must) , PostgreSQL and Redis.

  • Strong experience with automated testing

  • Strong ability to design, implement, and maintain scalable and secure APIs.

  • Proven experience with distributed system like SQS or RabbitMQ

  • Knowledge in Kafka for handling event-driven systems

  • Knowledge in containerization (Docker) and orchestration (Kubernetes).

  • Nice to have: Proficiency in CI/CD pipelines, and deployment strategies.

  • Nice to have: Proficiency in reactive programming

• 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 companies

• Outstanding 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 solutions

• AI and Technical Innovation

  • Continuously learns and applies emerging AI technologies to accelerate development, enhance technical investigation, and creatively solve problems.

  • Shares insights about AI tools and practices with the team, encouraging thoughtful experimentation and incremental adoption to improve workflows, and helps foster a culture of innovation.

Why 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 owner

• Unparalleled 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 like

We 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)

  Meet with our recruiter for a 30-minute video chat. We will get to know you better, understand what you’re looking for, and answer any questions you might have about ADDI.

• Step 2: Initial Interview (45 min)

  Meet with one backend software engineer for a 45-minute video chat interview. Here, we will ask you questions about your technical background and basic computer science concepts. You will be able to ask any questions about the culture and how we work at ADDI.

• Step 3: Take Home Challenge (1 week)

  Complete a simple take-home challenge within a 1-week window. With this technical challenge, we want to see your technical expertise solving a real-world problem. We expect that you invest 5 hours or less in developing a working solution.

• Step 4: Deep Dive Interview (60 min)

  Meet with a backend software engineer and the engineering manager for a 45-minute chat to talk about your take-home exercise submission and any questions you might have.

• Step 5: Co-Founder Interview (30 min)

  Meet onsite with one of our founders for a 30-minute chat to talk about the vision of the company, what we are building and how you will contribute to our product.

We value efficiency and respect for your time, so we aim to complete the process as quickly as possible. Our goal is to make this experience insightful and exciting for you, just as much as it is for us. Regardless of the outcome, we are committed to always providing feedback, ensuring that you walk away with valuable insights from your experience with us.