At a Glance
- Tasks: Build and maintain backend systems for an AI-driven investment platform.
- Company: Join a dynamic fintech startup with a focus on innovation.
- Benefits: Competitive salary, equity options, and a collaborative in-office environment.
- Other info: Enjoy high ownership and direct feedback in a supportive team culture.
- Why this job: Make a real impact on investor outcomes with cutting-edge technology.
- Qualifications: 5+ years of backend engineering experience and strong Golang skills.
The predicted salary is between 80000 - 160000 £ per year.
You build backend systems that stay up when things get ugly. You care about correctness, performance, and clarity over cleverness. You want your code to power decisions involving real money. If you have only worked on internal tools or low-impact services, this is not the role.
The Role, In Plain English
You will build the backend systems that power Reflexivity’s AI-driven investment platform. This role exists because scale, data complexity, and latency matter deeply in finance. You will work closely with AI and product teams to ship production-grade systems.
What You’ll Be Responsible For:
- Build and maintain Golang services that power core product workflows
- Design APIs and data pipelines used by AI and reasoning systems
- Improve system performance, reliability, and observability
- Review and challenge designs to keep systems simple and scalable
- Debug production issues with speed and discipline
What “Good” Looks Like in This Role:
After 3 months: You ship production code confidently and understand system trade-offs.
After 6 months: You own critical services and improve their performance or reliability.
After 12 months: You influence architecture decisions and mentor other engineers.
Who You Are (Must-Haves):
- 5 plus years backend engineering experience
- Strong Golang experience in production systems
- Startup experience on a core product
- Experience working with data-heavy systems
- Comfortable using AI-assisted coding tools daily
- Fintech or investment domain exposure
Nice-to-Haves:
- Experience supporting ML or LLM systems
- Distributed systems or low-latency data pipelines
How We Work:
- Engineers own systems end to end
- Clear accountability and direct feedback
- In-office team with high trust and high ownership
Why This Role Is Worth Your Time:
- Work on systems that directly affect investor outcomes
- Strong technical ownership
- High bar engineering culture without bureaucracy
Compensation & Practicalities:
£80,000 to £160,000 depending on experience. Equity included. In-office role based in London. No agencies.
Salary Range: £80,000 - £160,000 GBP
Backend Software Engineer, Golang - London employer: Reflexivity
Reflexivity is an exceptional employer for Backend Software Engineers, offering a dynamic work environment in London where innovation meets finance. With a strong emphasis on technical ownership and a high-performance culture, employees are empowered to make impactful decisions that drive investor outcomes. The company fosters growth through mentorship and collaboration with AI and product teams, ensuring that every engineer has the opportunity to influence architecture and enhance their skills in a supportive, trust-based atmosphere.
