Senior Platform Engineer - APIs & IAM (Barcelona)

Affinity Inc

Barcelona

Hybrid

EUR 90,000 - 130,000

Full time

14 days+

A complete application in a minute

Tailored resume and cover letter, ready to send.

Get past ATS filters

Benefits offered by this job

Health Benefits

Learning & Development

Wellness Support

Job summary

Affinity Inc is seeking a Senior Software Engineer for our One Platform team in Barcelona. You will help shape the technical roadmap, implement internal and external API layers, and work on our integration platform and access management systems.

Based in Barcelona, you will join a hub-hybrid environment with in-office days and collaborate across product, engineering, and design to deliver high-impact solutions while ensuring data privacy and scalable performance.

Qualifications

7+ years of software engineering experience with senior-level responsibilities.
Experience building web APIs and backend services using modern OOP practices.
Strong understanding of relational databases and diagnosing performance bottlenecks.
Comfortable troubleshooting across network, application, caching, queuing and storage layers.
Experience solving high-scale integration challenges or BI platforms.
Clear communication of technical decisions and ownership mindset.
Ability to work with cross-functional teams and stakeholders.
Proficient in English.

Responsibilities

Own product areas essential to customer success and business.
Collaborate with engineering, product, and design teams to learn and contribute.
Drive best practices for APIs, integrations and IAM systems.
Mentor other engineers to raise the team's capabilities.
Promote operational excellence with reliability, performance, and scalability.