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# Senior Backend Engineer (Product)

- **Company:** Finom
- **Location:** Girona, Spain
- **Contract:** Permanent contract
- **Skills:** .NET Framework, Artificial Intelligence, Apple IOS, Automation of Tests, C Sharp (Programming Language), Code Review, Distributed Systems, Python (Programming Language), PostgreSQL, Machine Learning, RabbitMQ, Redis, Tensorflow, ReactJS, Appium, Backend, Kotlin, Kubernetes, Playwright, Apache Kafka, Front End Software Development
- **Published:** September 25, 2026
- **Apply:** https://www.buscojobs.com.es/senior-backend-engineer-product-en-girona-ID-373176725

## About the Role

NET/C#, PostgreSQL, Redis, RabbitMQ, Kafka, Kubernetes, GCPYou'll work alongside teams using React (Web), Swift (iOS) / Kotlin (Android), Python/ML frameworks, and modern test automation tools (Playwright, Appium)You communicate clearly across disciplines and genuinely enjoy the dynamics of a cross-functional team where everyone contributes to solving the same customer problems.
Above all, you're curious - about the product, the users, the business, and how your technical decisions impact all threeYou're pragmatic, learn quickly, and have a proven track record of shipping products that matterYou're comfortable discussing trade-offs with product managers, explaining technical constraints to business stakeholders, and collaborating with frontend and mobile engineers to design elegant end-to-end solutionsAs a product-minded backend engineer, you don't just implement tickets.
You understand the "why" behind what you're building, challenge assumptions when needed, and proactively identify opportunities to create better outcomesYou have deep expertise in .
NET and C# with a strong appreciation for maintainable, scalable code, and distributed architecturesBut more importantly, you know when to apply that expertise and when simpler solutions serve the product better.
You've built data-intensive applications before and understand the concepts of working in a regulated environmentYou take ownership not just of your code, but of the outcomes.
You move without being prompted, whether that's jumping into a customer issue, improving team processes, or mentoring colleaguesQuality is non-negotiable for you.
Automated testing, thorough code reviews, and security best practices are fundamental to how you work.
You balance technical excellence with pragmatism, always keeping the end user and business goals in mindHands?on experience architecting and evolving distributed systems in productionAt least 5 years of professional backend development with a product engineering mindsetProven ability to collaborate effectively with product managers, designers, and engineers from other disciplinesClear, concise communication in English across technical and non-technical audiencesExcellent knowledge of .
NET platform and C#A builder's mentality: you care deeply about shipping great products, not just writing great codeStrong business acumen - you understand how your work connects to company objectivesYou're curious about adjacent domains - you might peek at the frontend code, ask questions about the ML models, or dive into analytics to understand how features perform

## Description

Maintaining our start-up spirit, we prioritize thorough research, swift implementation of solutions, and ensuring that every effort we make benefits our users, employees, partners, and, of course, our businessWe're looking for a Senior Backend Engineer who thinks like a product builder, thrives in a collaborative, cross-functional environment, and is passionate about creating robust, scalable financial infrastructureYou'll be part of a domain team where various engineering crafts (Backend, Frontend, Mobile, ML/AI engineers, and QA) work together to own and evolve a shared product area that delivers real value to hundreds of thousands of businesses across EuropeOur tech stack:Backend: .NET/C#, PostgreSQL, Redis, RabbitMQ, Kafka, Kubernetes, GCPYou'll work alongside teams using React (Web), Swift (iOS) / Kotlin (Android), Python/ML frameworks, and modern test automation tools (Playwright, Appium)You communicate clearly across disciplines and genuinely enjoy the dynamics of a cross-functional team where everyone contributes to solving the same customer problems.Above all, you're curious - about the product, the users, the business, and how your technical decisions impact all threeYou're pragmatic, learn quickly, and have a proven track record of shipping products that matterYou're comfortable discussing trade-offs with product managers, explaining technical constraints to business stakeholders, and collaborating with frontend and mobile engineers to design elegant end-to-end solutionsAs a product-minded backend engineer, you don't just implement tickets.You understand the "why" behind what you're building, challenge assumptions when needed, and proactively identify opportunities to create better outcomesYou have deep expertise in .NET and C# with a strong appreciation for maintainable, scalable code, and distributed architecturesBut more importantly, you know when to apply that expertise and when simpler solutions serve the product better.You've built data-intensive applications before and understand the concepts of working in a regulated environmentYou take ownership not just of your code, but of the outcomes.You move without being prompted, whether that's jumping into a customer issue, improving team processes, or mentoring colleaguesQuality is non-negotiable for you.Automated testing, thorough code reviews, and security best practices are fundamental to how you work.You balance technical excellence with pragmatism, always keeping the end user and business goals in mindHands?on experience architecting and evolving distributed systems in productionAt least 5 years of professional backend development with a product engineering mindsetProven ability to collaborate effectively with product managers, designers, and engineers from other disciplinesClear, concise communication in English across technical and non-technical audiencesExcellent knowledge of .NET platform and C#A builder's mentality: you care deeply about shipping great products, not just writing great codeStrong business acumen - you understand how your work connects to company objectivesYou're curious about adjacent domains - you might peek at the frontend code, ask questions about the ML models, or dive into analytics to understand how features perform#J-*****-Ljbffr


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