Senior Backend Developer Contract Role: Day Rate: €350-€380 per day, 8-12 month contract

You’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 Do

Design, develop, deploy, and maintain backend services aligned with team and business goals

Write clean, well-documented, production-grade code

Contribute to service architecture, resilience, scalability, and robustness using Domain-Driven Design principles

Participate in technical decision-making and mentor other engineers as you grow in technical leadership

Business Tech Stack Backend: Go, Frontend: React.Js, Mobile: Kotlin, Swift, Infrastructure: Kubernetes on AWS, Database: PostgreSQL, Messaging & Observability: Kafka, ELK stack, and other modern tools

Your Team You’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 You

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

Hiring Process Interviews 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.

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📌 Senior Backend Developer - €350 - €380 A Day (Madrid)
🏢 Forsyth Barnes
📍 Madrid