ppbJoin COLIBRIX ONE - Innovating the Future of Payments /b /ppAtbCOLIBRIX ONE* /b, we’re building advanced, AI-powered payment technologies that support Payment Service Providers (PSPs), Electronic Money Institutions (EMIs), and neobanks across the EU and the UK. As a fully licensed EMI (FCA reference number ) and a Principal Member of Mastercard, we offer real-world financial solutions that include: /pulliGlobal card processing /liliDigital wallet infrastructure /liliCross-border merchant accounts /liliAlternative payment methods (APMs) /liliCorporate accounts for legal entities /li /ulpWe’re a fast-growing team with a passion for innovation, security, and scalability. Our culture values curiosity, collaboration, and impact - and we’re looking for talented professionals who are ready to shape the future of fintech. /ppAt COLIBRIX ONE, your work directly powers the digital economy. If you're eager to solve meaningful challenges and build with purpose, we’d love to hear from you.br/ /ph3About the Role /h3pWe write detailed technical specs. Your job is to turn them into working product by orchestrating AI coding agents — and to own the quality of everything that ships. Our toolchain is Claude Code with custom skills on top of a structured spec pipeline; if you bring approaches that have worked for you, we are happy to compare and adopt what proves effective. You will work directly with the coordinators of this direction: the agentic development process is already up and running, and you will be its first dedicated engineer. /ph3Responsibilities /h3ulliTake a spec and drive it to production: clarify ambiguities with the spec author instead of guessing, decompose work into small verifiable increments, execute via AI agents /liliDesign verification before generation: acceptance criteria, tests, invariants and API contracts that make agent output checkable /liliReview and accept agent-generated code: catch silent scope creep, tests fitted to bugs, hallucinated APIs,



code that passes but does the wrong thing /liliStep in and code by hand when an agent hits a dead end (mostly Go) /liliBuild and tune the agent toolchain: skills, prompts, guardrails, workflows — and measure what matters: first-pass acceptance rate, rework volume, spec-to-production cycle time /li /ulh3What You Need to Succeed in This Role /h3ulli3–5 years of professional software engineering experience /liliStrong Go backend engineering: services, APIs, concurrency, data consistency — this is where mistakes cost the most (our stack: MongoDB, NATS, gRPC) /liliComfort with event-driven architecture: any message broker (we use NATS), idempotent consumers, outbox, sagas/compensations, retries with DLQ, eventual consistency /liliWorking React/TypeScript: enough to deliver and review SPA features built on top of our APIs /liliPayments/fintech experience is a strong plus: idempotency, transactional integrity, money handling, audit trails; subscriptions and recurring billing — an even stronger plus /liliProven ability to read, debug and refactor code you didn't write — most of this role is review and acceptance, not typing /liliHands-on production experience with AI coding agents — not demos /liliDiscipline to work from specs and keep requirement → code → test traceabilitybr/ /li /ulh3Growth path /h3ptoday you own delivery on a dedicated project; as the agentic approach scales across the company, you help engineers from our classic development track adopt it. /ph3Who this is NOT for /h3pengineers who want to hand-write most of their code, or who accept generated code they haven't tried to break.br/ /ph3What We Offer /h3ulliOpportunity to shape the future of fintech solutions within a growing company /liliCollaborative, horizontal team structure that values your expertise and ideas /liliContinuous learning and development opportunities to enhance your skills and career growth /liliCompetitive salary and benefits package /li /ulp* This position is offered within the COLIBRIXONE. Employment will be under the appropriate legal entity based on the role and location. /p /p #J-18808-Ljbffr

📌 AI-Native Fullstack Engineer (Go + React) (Bellprat)
🏢 Colibrix One
📍 Bellprat