Senior Backend Engineer (Python) in London

Senior Backend Engineer (Python) in London

London Full-Time 59400 - 72600 £ / year (est.) On-site
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At a Glance

  • Tasks: Build and evolve an AI platform using Python for top financial firms.
  • Company: Join Nevis, a pioneering AI wealth management startup backed by leading investors.
  • Benefits: Enjoy competitive salary, private medical insurance, and 25 days' annual leave.
  • Other info: Collaborate with a world-class team and own greenfield AI components.
  • Why this job: Make a real impact in a fast-paced environment with huge growth potential.
  • Qualifications: 4+ years of Python experience, ideally in AI platforms or ML infrastructure.

The predicted salary is between 59400 - 72600 £ per year.

About Nevis

Nevis is building the world’s first AI wealth management platform. We are building the system financial advisors will run on for the next decade. Our AI completes work, automates workflows end to end, and frees advisors to spend more time with clients. In the future, every wealth management firm will run on Nevis.

Nevis was founded by an exceptional team of ex-Revolut executives and has raised a total of $40 million from world leading investors including Sequoia Capital, ICONIQ and Ribbit.

The Role

We are looking for an exceptional Software Engineer (Python) to help build the AI platform that powers intelligent workflows for the world’s top financial firms. In this role, you will design and implement the Python systems, services, and orchestration layers that accelerate AI development across Nevis. You’ll work across applied AI, data pipelines, model execution frameworks, agentic systems, retrieval infrastructure, and backend components that support our AI products.

You’ll thrive here if you love building production-grade AI platforms, care about performance and reliability, and want to work on systems that move from idea to production in days. You’ll be joining a world-class engineering team with deep experience building AI systems at scale.

What You’ll Do

  • Build and evolve Nevis’ Python-based AI platform, powering core workflows and agentic automation.
  • Develop model orchestration, data processing pipelines, retrieval systems, and execution runtimes for applied AI features.
  • Create scalable APIs, services, and internal tools enabling rapid development, evaluation, and deployment of AI systems.
  • Architect robust systems for model inference, prompt execution, vector retrieval, and multi-step agent reasoning.
  • Maintain high engineering standards through clean code, testing, observability, and CI/CD.
  • Collaborate closely with AI engineers, product managers, and designers to ship features used by thousands of clients.
  • Own greenfield AI platform components from architecture through production rollout.
  • Participate in design reviews, code reviews, and technical debates that shape the future of Nevis’ technical direction.

Who You Are

  • 4+ years of experience in Python engineering, ideally building AI platforms, ML infrastructure, or applied AI products.
  • Deep expertise in Python, asynchronous programming, system design, and backend engineering fundamentals.
  • Hands-on experience building production systems involving:
    • LLM orchestration or agent frameworks (Pydantic, LangChain, custom orchestration).
    • Data pipelines, ETL, embeddings, or vector search.
    • Retrieval-augmented generation (RAG) or model-backed workflows.
    • High-performance APIs and distributed services.
  • Strong understanding of modern cloud environments (AWS preferred).
  • Solid foundation in computer science, distributed systems, or related fields.
  • Fast learner with a bias for action and a strong ownership mindset.
  • Excellent communication and collaboration skills.
  • Comfortable operating in a fast-paced, high-growth environment.

Nice to Have

  • Experience shipping applied AI or ML-powered products in production.
  • Knowledge of vector databases, feature stores, or streaming systems.
  • Background in fintech, financial services, wealth management, or startups.

Why Join Nevis?

  • Work alongside a world-class founding team backed by Sequoia, ICONIQ, and Ribbit.
  • Build core systems at a hyper-growth AI startup redefining wealth management.
  • Fast-paced environment with huge scope for ownership, impact, and career growth.
  • Mission-driven culture with global industry-changing potential.
  • 25 days’ annual leave.
  • Private medical insurance.
  • Competitive salary and benefits, including company equity.

Senior Backend Engineer (Python) in London employer: Nevis Wealth

At Nevis, we pride ourselves on being an exceptional employer, offering a dynamic and fast-paced work environment where innovation thrives. As a Product Owner, you'll collaborate with a talented team of engineers and designers to shape the future of AI in wealth management, while enjoying competitive salaries, equity options, and ample opportunities for professional growth. Join us in our mission to revolutionise the industry and make a meaningful impact on financial advisors and their clients.

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Contact Details:

Nevis Wealth Recruitment Team

StudySmarter Expert Advice🤫

We think this is how you could land Senior Backend Engineer (Python) in London

✨Join Local Tech Meetups

Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at Nevis Wealth or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!

✨Contribute to Open Source Projects

Show off your coding chops by jumping into open-source projects. Not only does this give you practical experience, but it also gets you noticed in the dev community. You'll create a killer portfolio that speaks volumes about your skills to Nevis Wealth.

✨Tap into Online Developer Communities

Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like Nevis Wealth.

✨Explore Job Boards Specifically for Tech Roles

Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like Nevis Wealth that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!

We think you need these skills to ace Senior Backend Engineer (Python) in London

Python Engineering
Asynchronous Programming
System Design
Backend Engineering Fundamentals
LLM Orchestration
Agent Frameworks (Pydantic, LangChain)
Data Pipelines

Some tips for your application 🫡

Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.

Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at Nevis Wealth.

Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Nevis Wealth and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!

Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!

How to prepare for a job interview at Nevis Wealth

✨Brush Up on Your Coding Skills

For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.

✨Know Your Tools and Frameworks

Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If Nevis Wealth uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.

✨Showcase Your Projects

Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.

✨Prepare for Behavioural Questions

While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.