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Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Software Engineer - **Company:** Mambu - **Location:** Barcelona, Spain (Remote available) - **Contract:** Permanent contract - **Skills:** Application Programming Interfaces (APIs), Software as a Service, Code Review, Relational Databases, DevOps, Software Architecture, Standard Sql, Software Engineering, Management of Software Versions, Technical Debt, Backend, Api Design, Golang - **Published:** September 9, 2026 - **Apply:** https://www.buscojobs.com.es/senior-software-engineer-en-barcelona-ID-370165674 ## About the Role You'll work on critical, high-stakes production issues and help accelerate product velocity.Compensaciones / Beneficios - Develop bank connectivity and payment automation features with emphasis on security, stability, and performance - Own architectural decisions for complex, high-impact projects and guide technical direction - Collaborate with Product Managers and DevOps engineers to maintain fast, iterative delivery - Apply security-by-design principles to APIs and systems - Solve architectural challenges to reduce complexity while delivering value - Mentor and upskill junior/mid-level engineers through code reviews and pairing - Define and execute the technical roadmap to improve velocity and manage technical debt - Serve as technical reference for critical incidents and production issuesResponsabilidades - 5+ years of professional software engineering experience, with strong Golang expertise - Background in fintech, banking, or payments (SEPA, Swift, Ebics...) - Proven track record designing and owning distributed backend systems in production - Strong relational database and SQL skills, including high-concurrency and transactional integrity - Experience building high-volume SaaS platforms with maintainable and well-documented code - Advanced API design skills with focus on security, versioning, and documentation - Proven ability to mentor engineers and raise engineering standards - Curious, product-oriented mindset with high autonomyRequisitos principales - Competitive base salary - Company equity for all - Learning and development opportunities - Hybrid/Remote working (location dependant) - 60 day working abroad - 4 week paid sabbatical after 5 years service ## Description Experteer Overview As a Senior Backend Software Engineer at Mambu, you will build secure, high-performance bank connectivity and payment automation features.You'll own architectural decisions for complex backend systems and collaborate with cross-functional teams to deliver scalable fintech solutions.You'll shape the technical direction, mentor peers, and drive security-by-design across public and internal APIs.This role offers impact at scale within a fast-paced, innovative fintech environment.You'll work on critical, high-stakes production issues and help accelerate product velocity.Compensaciones / Beneficios - Develop bank connectivity and payment automation features with emphasis on security, stability, and performance - Own architectural decisions for complex, high-impact projects and guide technical direction - Collaborate with Product Managers and DevOps engineers to maintain fast, iterative delivery - Apply security-by-design principles to APIs and systems - Solve architectural challenges to reduce complexity while delivering value - Mentor and upskill junior/mid-level engineers through code reviews and pairing - Define and execute the technical roadmap to improve velocity and manage technical debt - Serve as technical reference for critical incidents and production issuesResponsabilidades - 5+ years of professional software engineering experience, with strong Golang expertise - Background in fintech, banking, or payments (SEPA, Swift, Ebics...) - Proven track record designing and owning distributed backend systems in production - Strong relational database and SQL skills, including high-concurrency and transactional integrity - Experience building high-volume SaaS platforms with maintainable and well-documented code - Advanced API design skills with focus on security, versioning, and documentation - Proven ability to mentor engineers and raise engineering standards - Curious, product-oriented mindset with high autonomyRequisitos principales - Competitive base salary - Company equity for all - Learning and development opportunities - Hybrid/Remote working (location dependant) - 60 day working abroad - 4 week paid sabbatical after 5 years service ## Related Videos - [Migrating half a million users to a new payment service provider](https://www.wearedevelopers.com/videos/730-migrating-half-a-million-users-to-a-new-payment-service-provider) - [From DevOps to Scaled DevOps: How We’re Rebuilding Continuous Delivery as a Platform](https://www.wearedevelopers.com/videos/100018-from-devops-to-scaled-devops-how-we-re-rebuilding-continuous-delivery-as-a-platform) - [Go with the Flow: Stop the Leaks Before Your Memory's a Waterfall!](https://www.wearedevelopers.com/videos/100073-go-with-the-flow-stop-the-leaks-before-your-memory-s-a-waterfall) - [Developing the Backend with Stefan Lingler, CTO at Shpock](https://www.wearedevelopers.com/videos/100360-developing-the-backend-with-stefan-lingler-cto-at-shpock) - [#90DaysOfDevOps - The DevOps Learning Journey](https://www.wearedevelopers.com/videos/548-90daysofdevops-the-devops-learning-journey) - [Meet Your New BFF: Backend to Frontend without the Duct Tape](https://www.wearedevelopers.com/videos/682-meet-your-new-bff-backend-to-frontend-without-the-duct-tape) ## Related Articles - [Fully Remote Software Engineer Jobs](https://www.wearedevelopers.com/magazine/447-fully-remote-software-engineer-jobs) - [Spanish Business Culture and Etiquette](https://www.wearedevelopers.com/magazine/353-spanish-business-culture-and-etiquette) - [How Much Does a Software Engineer Make? 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