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- Tasks: Join us as a Backend Software Engineer to build a modern payments platform from scratch.
- Company: We're an innovative fintech startup, re-wiring global payments with no legacy systems.
- Benefits: Enjoy competitive salary, high-equity package, and flexible remote work options.
- Why this job: Be a core part of our mission to reinvent financial infrastructure and make a real impact.
- Qualifications: 3+ years in backend systems with C#/.NET; experience in cloud-native infrastructure preferred.
- Other info: Work in-person in London with some flexibility, and embrace AI tools to enhance your coding.
The predicted salary is between 36000 - 60000 £ per year.
We are an early-stage fintech startup re-wiring the global payments infrastructure. We’re backed by industry insiders, with deep experience in the financial ecosystem. We’re building from zero—no tech debt, no legacy systems. Now we’re looking for a founding backend engineer to join us at the ground level and help bring this platform to life.
This is a hands-on, high-impact role: you will write code daily, influence key architectural decisions, and ship fast using modern tools and AI.
- Build a modern backend from scratch in C#/.NET 8 with a clean, event-driven architecture.
- Help architect a scalable system using CQRS, Event Sourcing, DDD, microservices.
- Own key components in AWS: Lambda, SQS, SNS, DynamoDB, PostgreSQL, API Gateway.
You will ship clean code, scalable systems, and solve complex problems elegantly. You will use AI tools to design, code, debug, and ship faster, not just as a nice-to-have but a MUST-have force multiplier.
Requirements:
- 3+ years experience building backend systems and APIs in C#/.NET.
- Experience writing clean, testable code with a TDD mindset.
- Comfort with cloud-native infrastructure (preferably AWS).
- Background in payments, fintech, or secure data platforms.
- Experience building B2B platforms or financial APIs.
You won’t be a cog—you’ll be a core part of the company’s foundation. Help reinvent a critical piece of global financial infrastructure. Generous options in what we believe can be a generational fintech company.
Location: In-person in London 5 days a week with some flexibility (e.g. remote Fridays).
Compensation: Competitive salary + high-equity package.
Backend Software Engineer, Reliability employer: Stealth Startup
Contact Detail:
Stealth Startup Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Backend Software Engineer, Reliability
✨Tip Number 1
Familiarise yourself with the latest trends in fintech and backend development. Understanding the current landscape will not only help you during interviews but also show your genuine interest in the industry.
✨Tip Number 2
Get hands-on experience with C#/.NET 8 and AWS services like Lambda and DynamoDB. Building small projects or contributing to open-source can demonstrate your skills and commitment to potential employers.
✨Tip Number 3
Network with professionals in the fintech space, especially those who have experience in backend engineering. Attend meetups or online webinars to connect with others and learn from their experiences.
✨Tip Number 4
Showcase your problem-solving skills by preparing for technical interviews. Practice coding challenges that focus on clean code and scalable systems, as these are crucial for the role you're aiming for.
We think you need these skills to ace Backend Software Engineer, Reliability
Some tips for your application 🫡
Tailor Your CV: Make sure your CV highlights your experience with C#/.NET and backend systems. Emphasise any projects where you've built scalable systems or worked with cloud-native infrastructure, particularly AWS.
Craft a Compelling Cover Letter: In your cover letter, express your enthusiasm for the fintech industry and the opportunity to work on innovative payment solutions. Mention specific technologies and methodologies you’ve used, such as CQRS or Event Sourcing, to demonstrate your fit for the role.
Showcase Relevant Experience: When detailing your work history, focus on your achievements in building B2B platforms or financial APIs. Use metrics to quantify your impact, such as performance improvements or successful project completions.
Highlight Your Problem-Solving Skills: Since the role involves solving complex problems, include examples of challenges you've faced in previous roles and how you approached them. This will show your analytical thinking and ability to deliver elegant solutions.
How to prepare for a job interview at Stealth Startup
✨Showcase Your Technical Skills
Be prepared to discuss your experience with C#/.NET and how you've built backend systems in the past. Bring examples of your clean, testable code and be ready to explain your approach to TDD.
✨Demonstrate Your Problem-Solving Abilities
Expect to face technical challenges during the interview. Think through complex problems and articulate your thought process clearly. Highlight any experience you have with event-driven architecture and microservices.
✨Familiarise Yourself with Fintech Concepts
Since this role is within a fintech startup, brush up on your knowledge of payments, secure data platforms, and B2B financial APIs. Showing an understanding of the industry will set you apart from other candidates.
✨Emphasise Your Adaptability
This position requires a hands-on approach and the ability to ship fast using modern tools and AI. Be ready to discuss how you've adapted to new technologies in the past and how you see AI enhancing engineering teams.
