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# Senior Software Engineer

- **Company:** Socium - Teams Done Differently
- **Location:** Barcelona, Spain
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Amazon Web Services, Software Debugging, Django Web Framework, Python (Programming Language), PostgreSQL, Performance Tuning, Redis, Datadog, Backend, Containerization, Production Code, Apache Kafka, Docker, Microservices
- **Published:** July 31, 2026
- **Apply:** https://www.buscojobs.com.es/senior-software-engineer-en-barcelona-ID-364225983

## About the Role

What You'll Be Doing Designing and scaling backend systems using Python/Django Owning architecture in a microservices + event?driven environment Working closely with infrastructure and security teams (AWS) Leveraging AI tools to improve development speed and quality Mentoring engineers and contributing to engineering excellence Python, Django, AWS, Docker, Kafka, PostgreSQL, Redis, MondoDB and Datadog What We're Looking For 10+ years of backend engineering experience Strong expertise in Python & Django Proven track record scaling systems in startups or scale?ups Experience with AWS and containerized environments Deep understanding of PostgreSQL and performance optimisation Ability to debug complex production issues Focus on performance, reliability, and cost?efficiency Pragmatic, humble, and impact?driven mindset What's On Offer Health insurance + meal allowance A meaningful mission with real?world impact If you're excited about building scalable systems in a fast-moving fintech and
want to stay close to the code while influencing architecture, we'd love to hear from you.

## Description

Are you a hands?on backend engineer who loves building systems that scale?Do you enjoy owning architecture end-to-end while still writing production code every day?We're partnering with a fast-growing, VC-backed fintech on a mission to improve people's financial well?being.Since launching recently, they've already scaled to hundreds of thousands of users and processed over €1B in transactions - and they're just getting started.The Role This is a senior/staff-level, highly hands?on engineering role focused on designing, building, and scaling backend systems in a modern, event?driven environment.You'll play a key role in shaping architecture, solving complex problems, and raising the technical bar across the team.What You'll Be Doing Designing and scaling backend systems using Python/Django Owning architecture in a microservices + event?driven environment Working closely with infrastructure and security teams (AWS) Leveraging AI tools to improve development speed and quality Mentoring engineers and contributing to engineering excellence Python, Django, AWS, Docker, Kafka, PostgreSQL, Redis, MondoDB and Datadog What We're Looking For 10+ years of backend engineering experience Strong expertise in Python & Django Proven track record scaling systems in startups or scale?ups Experience with AWS and containerized environments Deep understanding of PostgreSQL and performance optimisation Ability to debug complex production issues Focus on performance, reliability, and cost?efficiency Pragmatic, humble, and impact?driven mindset What's On Offer Health insurance + meal allowance A meaningful mission with real?world impact If you're excited about building scalable systems in a fast-moving fintech and want to stay close to the code while influencing architecture, we'd love to hear from you.Apply or message me directly to learn more.#J-*****-Ljbffr


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