At a Glance
- Tasks: Build scalable applications and influence technical direction in a collaborative start-up.
- Company: Fast-growing AI start-up transforming compliance across the NHS.
- Benefits: Salary up to £115k, equity, flexible work, and career growth opportunities.
- Other info: Work in London and Cambridge with a hands-on role and plenty of autonomy.
- Why this job: Join a dynamic team and make a real impact with innovative AI technologies.
- Qualifications: Strong Python skills, experience with RESTful APIs, and a degree in Computer Science.
The predicted salary is between 40000 - 70000 £ per year.
Requirements
- We want strong technical skills, primarily with Python.
- We want experience with RESTful APIs; we use Fast API.
- Experience with Type Script, React, and other web technologies such as HTML5 and CSS3 would be beneficial.
- We want experience with LLMs and agentic AI.
- You should enjoy taking ownership and be able to build software from scratch and iterate quickly.
- You should be curious by nature, happy to learn, and able to pick up new things.
- You should be keen to work in a start-up environment and comfortable with unstructured environments.
- You should be collaborative with great communication skills.
- You should be degree educated, minimum 2.1 at BSc from a top tier university, preferably in Computer Science or a closely related discipline; an MSc or Ph D is likely.
- Advanced Python skills combined with tech start-up experience are preferred.
Responsibilities
- We will build scalable, cloud-native applications across the full software development lifecycle.
- We will take ownership of architecture and backend services.
- We will contribute to frontend development, CI/CD, and deployment on Azure.
- We will collaborate closely with the founding team to influence technical direction and solve complex engineering challenges.
- We will establish the engineering practices that will underpin the companys future growth.
- We will work primarily with Python and Type Script.
- We will leverage AI technologies to build innovative products that solve real-world problems.
- We will take a hands-on role with plenty of autonomy and a direct influence on product decisions, architecture, and engineering culture.
- Technologies
- Agentic AI
- AI
- Azure
- Backend
- CI/CD
- Cloud
- Fast API
- Frontend
- HTML5
- Python
- React
- Type Script
- Web
- API
- LLM
- More
We are a fast-growing AI start-up with strong backing and ambitious growth plans, building technology that is transforming compliance and operational efficiency across the NHS and wider regulated industries.
This is a founding engineer opportunity working alongside experienced founders in a highly collaborative environment.
You will join our team in London two days a week, with one day a week in Cambridge too, with expenses covered, and flexibility to work from home.
We offer a salary of up to 115k, equity, and an impactful role with excellent career growth opportunities.
- last updated 36 week of 2026
- #J-18808-Ljbffr
Lead Python Engineer API LLM employer: Client Server
Join a dynamic and innovative FinTech company that values technical expertise and offers a collaborative work culture. With a competitive salary of up to £100k plus bonuses, you'll have the opportunity to make a significant impact while enjoying hybrid working arrangements in London. The company prioritises employee growth, providing ample opportunities for career progression and staying at the forefront of emerging technologies in the finance sector.
StudySmarter Expert Advice🤫
We think this is how you could land Lead Python Engineer API LLM
✨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 Client Server 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 Client Server.
✨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 Client Server.
✨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 Client Server 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 Lead Python Engineer API LLM
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 Client Server.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at Client Server 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 Client Server
✨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 Client Server 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.
