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# Senior Backend Developer - €350 - €380 A Day

- **Company:** Forsyth Barnes
- **Location:** Valladolid, Spain
- **Salary:** €91,000.0 - €98,800.0
- **Contract:** Temporary contract
- **Skills:** Clean Code Principles, Amazon Web Services, Code Review, Databases, PostgreSQL, Service-Oriented Architecture, Systems Integration, ReactJS, Swift (Programming Language), Backend, Kotlin, Kubernetes, Apache Kafka, Front End Software Development, Domain Driven Design, Elk Stack
- **Published:** September 27, 2026
- **Apply:** https://www.buscojobs.com.es/senior-backend-developer-%E2%82%AC-350-%E2%82%AC-380-a-day-en-valladolid-ID-372592203

## About the Role

Solid background building user-facing products and working with large-scale, high-traffic systems
Problem solver: Pragmatic, product-minded, and focused on delivering customer value
Impact-driven: Motivated by building products used by tens of thousands of users
Quality-oriented: Strong advocate for testing, clean code, and constructive code reviews
Curious: Eager to learn, improve, and explore new ideasCollaborative: Comfortable working closely with both technical and non-technical partners
Language: Fluent in English

## Description

Senior Backend DeveloperContract Role: Day Rate: €350-€380 per day, 8-12 month contractYou'll join a large, distributed backend engineering community and work within cross-functional teams alongside product managers, frontend, and mobile engineers. You'll play a key role in shaping core financial products, supporting a rapidly growing user base, and delivering high-quality solutions in a fast-paced environment.What You'll DoDesign, develop, deploy, and maintain backend services aligned with team and business goalsWrite clean, well-documented, production-grade codeContribute to service architecture, resilience, scalability, and robustness using Domain-Driven Design principlesParticipate in technical decision-making and mentor other engineers as you grow in technical leadershipBusiness Tech StackBackend: Go, Frontend: React.Js, Mobile: Kotlin, Swift, Infrastructure: Kubernetes on AWS, Database: PostgreSQL, Messaging & Observability: Kafka, ELK stack, and other modern toolsYour TeamYou'll join a large Product Engineering organization, structured into small cross-functional teams across multiple domains, including: Customer onboarding, account management, and compliance; Payments and financial operations; Platform systems, integrations, and monetization; Cash flow management and bookkeeping tools; Collaborative accounting and pre-accounting solutions. Each team typically includes 6-8 backend engineers and owns its product scope end to end.About YouSolid background building user-facing products and working with large-scale, high-traffic systemsProblem solver: Pragmatic, product-minded, and focused on delivering customer valueImpact-driven: Motivated by building products used by tens of thousands of usersQuality-oriented: Strong advocate for testing, clean code, and constructive code reviewsCurious: Eager to learn, improve, and explore new ideasCollaborative: Comfortable working closely with both technical and non-technical partnersLanguage: Fluent in EnglishHiring ProcessInterviews with a Talent Acquisition partner and future team members, A remote or onsite technical exercise to showcase your skills and experience what it's like to work with the team.#J-*****-Ljbffr