Job overview

Todas las habilidades, cualificaciones y experiencia relevantes que necesitará un candidato seleccionado se enumeran en la siguiente descripción.

With our growing customer base and our expansion into new markets and use cases, we have more to build than ever at Affinity as we execute on our vision to put relationship intelligence at every professional's fingertips.

Position

Senior Software Engineer in the One Platform team. You'll be one of our first team members in our brand-new Barcelona office and help drive the technical roadmap and implementation of our Internal and External API layers, our 3rd party integration platform, and access management systems.

Location

Barcelona, Spain. The role embraces a hub‑hybrid model: team members in‑office 2 days per week.

In this role, you will

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- Own product areas essential to the success of our customers and business.

- Collaborate with world‑class engineering, product, and design teams.

- Drive technical best practices for our APIs, integrations, and IAM systems that allow our platform to exceed its performance goals and customers' expectations.

- Mentor other engineers to uplevel them individually and the team as a whole.

- Promote operational excellence with focus on high reliability, performance, and scalability.

Qualifications

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- ~7+ years of experience in software engineering, with at least 2+ years as a senior member of a team delivering end‑to‑end systems.

- Experience with web APIs and backend services using modern OOP practices.

- Strong understanding of relational databases and ability to diagnose performance bottlenecks at the database layer.

- Comfortable troubleshooting across network, application, caching, queuing, and storage layers.

- Experience solving high‑scale challenges, integrating systems, or developing business intelligence platforms.

- Clear communication of nuanced ideas, both in writing and in real time.

- Strong ownership instincts and attention to detail.

- Excited to work on a cross‑functional team, partnering with product stakeholders, other teams, and subject matter experts.

- Language requirement: Proficient in English.

Tech stack

Our systems are built in Ruby on Rails, PostgreSQL, Redis, TypeScript, and React. Infrastructure is hosted by AWS and runs on Kubernetes. This role focuses heavily on backend development with some frontend involvement.

Benefits

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- Comprehensive health insurance for you and your family.

- Annual education budget and comprehensive L&D; program. xcskxlj

- Monthly wellness budget for memberships/equipment.

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📌 Senior Software Engineer (Barcelona)
🏢 Affinity (CRM)
📍 Barcelona