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For Companies At a Glance
- Tasks: Build innovative, data-driven products and ship features quickly with a focus on user experience.
- Company: Join a fast-moving startup that values collaboration and rapid learning.
- Benefits: Competitive salary, flexible work environment, and opportunities for professional growth.
- Why this job: Make a real impact by owning product areas and seeing your work in production within days.
- Qualifications: Strong Python skills and a product mindset are essential; experience with APIs is a plus.
- Other info: Dynamic team culture with excellent career advancement opportunities.
The predicted salary is between 36000 - 60000 ÂŁ per year.
RootCause.ai is a fast-moving startup building data-driven products that help teams understand what happened and why. We ship quickly, learn constantly, and keep process light. You will work with founders daily, own meaningful product areas end to end, and see your work in production within days, not quarters, with AI-assisted workflows across the stack.
This is a full-stack role for product development. You’ll build polished, data-heavy product experiences and the typed APIs behind them. You’ll care about UX, performance, correctness, and reliability—and you’ll enjoy turning ambiguous problems into shipped software.
What you’ll do:
- Ship user-facing product features in Next.js/React/TypeScript: reusable Tailwind components, complex states, and data-heavy views.
- Design clean, typed contracts between UI and backend using tRPC and FastAPI.
- Build product workflows end-to-end: from UX to API to persistence (MongoDB) to async processing (Temporal/RabbitMQ) where needed.
- Own quality pragmatically: performance profiling, testing where it matters, and observability/diagnostics to keep production healthy.
- Collaborate closely with founders and users: scope, prototype, iterate, and ship improvements based on real feedback.
- Contribute to deployment/ops on Kubernetes and GitLab CI/CD (you don’t need to be a platform engineer, but you won’t fear production).
What success looks like (first ~90 days):
- You’ve shipped multiple meaningful product improvements with clean UX and stable APIs.
- You’ve taken ownership of at least one product area (features + metrics + reliability).
- You’ve improved one “pain point” (latency, workflow reliability, DX, or UI performance) and made it measurable.
Must-have:
- Strong Python experience (FastAPI or similar), comfortable building/maintaining APIs.
- Product mindset: you clarify goals, reduce scope intelligently, and ship value quickly.
- Comfort working end-to-end: UI state, data modeling, API design, basic infra/ops concepts.
- Solid fundamentals: debugging, performance reasoning, and clear async communication.
Strongly Preferred:
- Temporal and/or event-driven systems (queues, retries, idempotency, background jobs).
- Kubernetes and cloud experience (AWS/GCP/Azure).
- Observability (OpenTelemetry or similar): traces/metrics/logs; production debugging chops.
- Rust and/or C++ experience.
Good to Have:
- Public code, technical posts, or talks.
- Personal projects.
- Examples where you reduced scope to ship faster without hurting quality.
- Stories of debugging tough production issues and how you prevented repeats.
Senior Full-Stack Engineer in London employer: RootCause.ai
Contact Detail:
RootCause.ai Recruiting Team
StudySmarter Expert Advice 🤫
We think this is how you could land Senior Full-Stack Engineer in London
✨Tip Number 1
Network like a pro! Reach out to your connections in the tech world, especially those who work at startups. A friendly chat can lead to insider info about job openings or even a referral, which can give you a leg up in the application process.
✨Tip Number 2
Show off your skills! Create a portfolio showcasing your projects, especially those involving Next.js, React, and Python. Make sure to include any personal projects or contributions to open-source that highlight your ability to ship quality software quickly.
✨Tip Number 3
Prepare for interviews by practising common technical questions and coding challenges. Focus on demonstrating your problem-solving skills and your understanding of full-stack development. Remember, it’s not just about coding; show your product mindset and how you can add value to the team.
✨Tip Number 4
Apply through our website! We love seeing candidates who are genuinely interested in joining us. Tailor your application to reflect your passion for building data-driven products and your eagerness to collaborate closely with founders and users.
We think you need these skills to ace Senior Full-Stack Engineer in London
Some tips for your application 🫡
Tailor Your CV: Make sure your CV reflects the skills and experiences that align with the Senior Full-Stack Engineer role. Highlight your Python experience, product mindset, and any relevant projects that showcase your ability to ship value quickly.
Craft a Compelling Cover Letter: Use your cover letter to tell us why you're excited about working at RootCause.ai. Share specific examples of how you've tackled ambiguous problems and shipped meaningful product improvements in the past.
Showcase Your Projects: If you have public code, technical posts, or personal projects, don’t hesitate to include them! This gives us a glimpse into your coding style and problem-solving abilities, which is super important for this role.
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 the role without any hiccups!
How to prepare for a job interview at RootCause.ai
✨Know Your Tech Stack Inside Out
Make sure you’re well-versed in the technologies mentioned in the job description, especially Python, FastAPI, and Next.js. Brush up on your knowledge of building APIs and handling data-heavy applications, as this will be crucial for demonstrating your fit for the role.
✨Showcase Your Problem-Solving Skills
Prepare to discuss specific examples where you've turned ambiguous problems into successful software solutions. Highlight your experience with performance profiling and debugging, as well as any improvements you've made to user experience or workflow reliability.
✨Demonstrate a Product Mindset
Be ready to talk about how you clarify goals and reduce scope intelligently to ship value quickly. Share stories that illustrate your ability to take ownership of product areas and make measurable improvements based on real feedback.
✨Engage with Founders and Users
Since collaboration is key in this role, think about how you can demonstrate your ability to work closely with others. Prepare questions that show your interest in understanding user needs and how you can contribute to the team’s success right from the start.
