Find a job 
Featured Companies 
Featured Universities 
For Companies At a Glance
- Tasks: Design and build impactful backend software in a microservices environment.
- Company: Fast-growing Gov/SecTech startup with real-world impact.
- Benefits: Competitive salary, autonomy, and the chance to shape engineering culture.
- Why this job: Make a difference in public safety and financial systems while working with cutting-edge tech.
- Qualifications: 5+ years of backend engineering experience and strong Python skills.
- Other info: Join a dynamic team with excellent growth opportunities and influence over architecture.
The predicted salary is between 48000 - 72000 £ per year.
Overview
Hybrid (Central London - 2–3 days a week)
Profitable, Series A Gov/SecTech Scale up
High-trust work with real-world impact across public safety and financial systems.
We’re partnered with a well-funded, Series A stage Gov/SecTech startup operating in the blockchain analytics space. You'd build software to support use cases such as financial crime prevention, terrorism risk analysis and crypto market safety. Much of their work sits under NDA, but the impact is tangible and meaningful. They’re around 25–30 people today and growing quickly.
We’re hiring a Senior/Senior+ Software Engineer to work closely with the Head of Engineering in an autonomous, hands-on role. This is an elevated senior position for someone who enjoys being close to the code, taking ownership of complex, high scale, backend systems, and solving ambiguous technical problems.
You’ll be designing and building core backend software and infrastructure in a microservices environment, with real influence over architecture, standards and how the platform evolves as the team scales. The tech stack today includes Python (FastAPI), Temporal for workflow orchestration, Kubernetes and Docker on AWS, with SQL-based databases and system-to-system integrations across services.
This is a high-impact senior role in a business that already has real customers, real revenue and real-world consequences to its work. You’ll be trusted with autonomy, given big technical responsibility, and have the opportunity to shape both the platform and the engineering culture as the team grows.
Responsibilities
- Design and build core backend software and infrastructure in a microservices environment.
- Work closely with the Head of Engineering in an autonomous, hands-on role.
- Take ownership of complex, high-scale backend systems and solve ambiguous technical problems.
- Influence architecture, standards and how the platform evolves as the team grows.
- Contribute to shaping engineering culture and practices as the team expands.
Qualifications
- 5+ years commercial backend engineering experience.
- Strong Python background (other languages such as GO are fine if you’re happy to move into Python).
- Experience building and running systems at scale (100k+ users or equivalent data volumes).
- Exposure to cloud-hosted microservices architectures.
- Experience contributing to architectural decisions in previous roles.
Bonus Points For
- Docker and Kubernetes experience in production environments.
- Terraform or infrastructure-as-code exposure.
- BigQuery / BigTable or large-scale data systems.
- Blockchain domain experience or interest (not required).
Senior+ Python Developer in London employer: Burns Sheehan
Contact Detail:
Burns Sheehan Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Senior+ Python Developer in London
✨Tip Number 1
Network like a pro! Reach out to your connections in the tech world, especially those in Gov/SecTech or blockchain. A personal introduction can make all the difference when you're aiming for that Senior Python Developer role.
✨Tip Number 2
Show off your skills! Prepare a portfolio of projects that highlight your experience with Python, microservices, and AWS. When you get the chance to chat with potential employers, having tangible examples ready will set you apart.
✨Tip Number 3
Be ready for technical challenges! Brush up on your problem-solving skills and be prepared to tackle some coding exercises or system design questions during interviews. This is your chance to shine and show how you can handle complex backend systems.
✨Tip Number 4
Apply through our website! We’re always on the lookout for talented individuals like you. By applying directly, you’ll have a better chance of getting noticed and landing that dream job with us.
We think you need these skills to ace Senior+ Python Developer in London
Some tips for your application 🫡
Tailor Your CV: Make sure your CV is tailored to the Senior Python Developer role. Highlight your experience with Python, microservices, and any relevant cloud technologies like AWS. We want to see how your skills align with our needs!
Showcase Your Projects: Include specific projects where you've designed and built backend systems. If you've worked on high-scale applications or contributed to architectural decisions, let us know! Real-world impact matters to us.
Craft a Compelling Cover Letter: Your cover letter should reflect your passion for the role and the Gov/SecTech space. Share why you're excited about working with us and how you can contribute to our mission of making a real-world impact.
Apply Through Our Website: We encourage you to apply directly through our website. It’s the best way for us to receive your application and ensures you’re considered for this exciting opportunity. Don’t miss out!
How to prepare for a job interview at Burns Sheehan
✨Know Your Tech Stack
Make sure you’re well-versed in the technologies mentioned in the job description, especially Python and microservices. Brush up on FastAPI, Docker, and Kubernetes, as these are crucial for the role. Being able to discuss your experience with these tools will show that you're ready to hit the ground running.
✨Showcase Your Problem-Solving Skills
Prepare to discuss specific examples where you've tackled complex backend issues or contributed to architectural decisions. Use the STAR method (Situation, Task, Action, Result) to structure your answers. This will demonstrate your ability to handle ambiguity and take ownership of technical challenges.
✨Understand the Company’s Impact
Research the company’s mission and the real-world impact of their work in public safety and financial systems. Be ready to articulate how your skills can contribute to their goals, especially in areas like financial crime prevention and blockchain analytics. This shows genuine interest and alignment with their values.
✨Cultural Fit Matters
Since this is a growing team, they’ll be looking for someone who can help shape the engineering culture. Think about how you’ve contributed to team dynamics in the past and be prepared to share your thoughts on fostering a positive engineering environment. This will highlight your readiness to take on a senior role.
