Senior Software Engineer – Python, AWS, SQL
Location: London - Hybrid (2 days per week on-site)
Salary: Up to £100,000
Type: Permanent, Full-Time
We’re partnering with an exciting, fast-growing technology business that’s tackling complex, real-world challenges with cutting-edge engineering.
They’re now looking for a Senior Engineer (IC3) to play a key role in designing and delivering high-impact, cross-service features within a modern, distributed platform.
What you’ll be doing:
- Leading the design and delivery of complex, scalable systems across multiple services
- Making pragmatic architectural decisions in a fast-moving environment
- Driving engineering excellence across testing, security, and observability
- Owning services in production – improving reliability, performance, and resilience
- Mentoring engineers and elevating team capability
- Collaborating cross-functionally with Product, Data, and Design
What they’re looking for:
- Strong experience designing scalable, maintainable systems with clear ownership boundaries
- Proven ability to lead delivery across ambiguous, complex problem spaces
- Deep understanding of reliability, observability, and production systems
- A security-first mindset with experience mitigating risks and vulnerabilities
- Excellent communication skills with the ability to influence and mentor
- Python Experience is preferred - though experience with similar languages are a plus e.g. Clojure, Rust, Kotlin, Scala, Golang.
- AWS Experience (Hands-on work with GCP/Azure is okay too)
- BSc in Computer Science
Why this role stands out:
- High ownership and autonomy in shaping technical direction
- Opportunity to work on meaningful, technically challenging problems
- A strong engineering culture focused on quality, delivery, and continuous improvement
- Clear impact on product performance, scalability, and team growth