Senior Front End Engineer

You are a Senior Full Stack Engineer who will join Tech Brasil, a small but strategic team responsible for key technology initiatives in Brazil. Your initial focus will be Kuna (our automotive financing product with auto equity and car loans), but you will soon expand to other critical projects.

Work Distribution: 70% frontend (React/Angular), 30% backend (Java/Spring Boot). You'll own the full integration: design APIs, consume them, handle data flows, and take responsibility across both layers. Kuna is Kavak's fintech vertical, where we build financial products for origination, credit, payments, collections, scoring, back office, and core integrations.

Frontend (Must-have)

• 6+ years of professional experience in React or Angular
• Strong UX/UI sensibility: you understand the interface is not cosmetic. It's functionality and experience
• Frontend-backend integration: consuming REST APIs, state management, data flows, service architecture

Backend (Must-have)

• Java + Spring Boot at an intermediate-to-advanced level
• Ability to design and review REST APIs (correct HTTP methods, request/response structures, pagination)
• Data modeling: understanding schemas, relationships, and how frontend queries map to backend
• Backend logic: validation rules, business logic placement (frontend vs backend), error handling

Full Stack (Must-have)

• Git and team workflow practices
• Clear understanding of responsibility boundaries: what validates in frontend (UX) vs backend (security, business rules)
• Ability to think architecturally: trace a feature from UI interaction → API call → database query → response

Tools & Mindset

• Active use of AI tools in your daily workflow (Claude Code, Copilot, or others)
• Native Portuguese and fluent Spanish or English

Plus (Nice-to-have)

• Experience in fintech, lending, payments, credit scoring, or collections
• Experience designing systems at scale (100k+ records, pagination, caching)
• WebSocket, polling, or real-time data patterns
• Familiarity with Spring Boot annotations and dependency injection

• Ownership: You take full responsibility for your work. You seek solutions without waiting for permission.

• Speed and Resilience: Kavak moves fast. We need people who thrive at a quick pace and don’t freeze. You can deliver even if everything isn’t perfect when the market needs it now.

• Autonomy: We work in a small team. You must self-direct, self-evaluate, identify what’s missing, and take action.

• Intellectual Curiosity: You ask questions, research, and don’t accept obvious solutions. You care about understanding why things are done a certain way.

• Clear Communication: You explain technical decisions to non-technical people. You receive feedback without defensiveness. You document what matters.

• Ability to work in ambiguity.

• Adaptability.

• Medical and dental coverage for you and your legal dependents
• WellHub (Gympass) access for physical activities and mental health support
• Meal and/or grocery allowance via Flash card, so you choose where and how to use it
• Mobility support or transportation voucher, with flexibility to fit your daily routine
• Free on‑site parking for those who prefer to commute by car
• Chartered transportation for greater comfort and safety
• Life insurance for additional security for you and your family
• Bereavement support (Amparo) to assist you and your family with administrative, financial and emotional challenges after the loss of a loved one
• Birthday day off so you can celebrate with an extra day of rest
• Extended paternity or maternity leave
• Discount on car purchases from Kavak’s inventory, plus four low‑cost maintenance checks according to our current policy