Senior AI Engineer

Senior AI Engineer

Full-Time 70000 - 90000 £ / year (est.) No working from home possible
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At a Glance

  • Tasks: Build and enhance AI agents, pushing the limits of what's possible with LLMs.
  • Company: Capsa is a fast-growing AI platform transforming private equity insights.
  • Benefits: Work in a hybrid model, enjoy rapid career growth and shape the company's future.
  • Other info: Collaborate directly with founders in a challenging yet rewarding startup environment.
  • Why this job: Join a dynamic team and make a real impact in an ultra-growth venture.
  • Qualifications: 4+ years in software engineering with AI/ML experience; strong Python skills required.

The predicted salary is between 70000 - 90000 £ per year.

Capsa is an AI platform that accelerates due diligence and deepens insights for Private Equity funds. We are hiring Staff / Senior AI Engineers who are comfortable building and improving our AI agents and pushing the boundaries of what's possible with LLMs.

Location: London, UK (Hybrid, In-Person 4 days a week)

Experience Required: 4+ years

Visa: We do not sponsor visas. Must have the right to work in the UK.

About Capsa AI

At Capsa, we’re on a mission to transform how private capital firms source, analyse, and win deals. Our AI operating system accelerates due diligence, unlocks deeper insights, and helps funds focus on what matters — creating value. We’re lean, ambitious, and obsessed with building a category-defining company. In just 12 months, we’ve grown ARR by 15x, achieved product–market fit with leading multi‑billion‑dollar PE firms, and expanded across the US, UK, and Europe. Backed by top VCs and senior PE execs from Warburg Pincus, KKR, and Goldman Sachs, we’re just getting started.

The Role

A senior AI engineer at Capsa is expected to own projects and features from conception to production, focusing on our core AI capabilities and agent infrastructure.

Key responsibilities

  • Improving our agent's capabilities – design and implement new features that endow our agent with human‑level investment expertise.
  • Designing and optimizing prompts, agent architectures, and reasoning chains to maximize output quality and reliability.
  • Evaluating and integrating new models, techniques, and research to keep our AI capabilities at the cutting edge.
  • Improving connectivity – integrate and incorporate additional data sources into our agent loop, increasing the depth and breadth of the analyses that can be performed.
  • Maintaining high code quality – uphold rigorous standards across our codebase, ensuring tech debt doesn't impede our velocity.

Recent projects

  • Agentic assistant with a finance‑focused toolkit and advanced document authoring features
  • Scalable document ingestion and indexing pipeline
  • In‑house, streaming‑first agent framework

As an early stage startup, working at Capsa will be hard work, it will be messy and at times it will be stressful. However, you will:

  • Work directly with our founding team.
  • Participate in the upside of an ultra‑growth venture.
  • Shape the company's vision and have a direct impact on its success.
  • Have the opportunity for fast career growth.

Apply if

You’ll likely be a great fit if most of the following describe you:

  • You have 4+ years of experience as a software engineer with significant exposure to AI/ML systems in a venture backed startup or top tech firm.
  • You have taken entire products or features from ideation to production and you've measured their impact.
  • You have experience with the following technologies (or similar): Python, LLMs (OpenAI, Anthropic, open‑source models), agent frameworks, RAG pipelines, vector databases, FastAPI, Postgres, ElasticSearch.
  • You enjoy diving deep into the domain, understanding the problem, and focusing on delivering value to the customer.
  • You thrive in a fast‑paced environment.

Locations

London, UK International House, 101 King’s Cross Road, WC1X 9LP

New York, US 228 Park Ave S, New York, 10003

Senior AI Engineer employer: Capsa AI Ltd

Capsa is an exceptional employer for Senior AI Engineers, offering a dynamic and innovative work environment in the heart of London. With a strong focus on employee growth, you will have the opportunity to work closely with the founding team, directly influencing the company's vision and success while participating in the rapid expansion of our cutting-edge AI platform. Our hybrid work model promotes a balanced lifestyle, and the fast-paced startup culture ensures that your contributions are valued and impactful.

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Contact Details:

Capsa AI Ltd Recruitment Team

StudySmarter Expert Advice🤫

We think this is how you could land Senior AI Engineer

Tip Number 1

Network like a pro! Reach out to folks in your industry on LinkedIn or at events. A friendly chat can lead to opportunities that aren’t even advertised yet.

Tip Number 2

Show off your skills! Create a portfolio or GitHub repo showcasing your AI projects. This gives potential employers a taste of what you can do and sets you apart from the crowd.

Tip Number 3

Prepare for interviews by practising common questions and coding challenges. We recommend doing mock interviews with friends or using platforms that simulate real interview scenarios.

Tip Number 4

Don’t forget to apply through our website! It’s the best way to ensure your application gets seen by the right people at Capsa. Plus, we love seeing candidates who are proactive!

We think you need these skills to ace Senior AI Engineer

AI/ML Systems
Python
LLMs (OpenAI, Anthropic, open-source models)
Agent Frameworks
RAG Pipelines
Vector Databases
FastAPI

Some tips for your application 🫡

Show Your Passion for AI:When you're writing your application, let your enthusiasm for AI and machine learning shine through. We want to see how you've pushed boundaries in your previous roles and how you can bring that energy to Capsa.

Tailor Your Experience:Make sure to highlight your relevant experience with AI/ML systems and the technologies mentioned in the job description. We love seeing specific examples of projects you've worked on that align with what we're doing at Capsa.

Be Clear and Concise:Keep your application straightforward and to the point. We appreciate clarity, so avoid jargon and focus on communicating your skills and experiences effectively. Remember, less is often more!

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. Plus, it shows you’re keen on joining our team!

How to prepare for a job interview at Capsa AI Ltd

Know Your AI Stuff

Make sure you brush up on your knowledge of AI/ML systems, especially the technologies mentioned in the job description like Python, LLMs, and agent frameworks. Be ready to discuss your past projects and how you've taken features from ideation to production.

Showcase Your Problem-Solving Skills

Prepare to talk about specific challenges you've faced in previous roles and how you tackled them. Capsa is looking for someone who can dive deep into problems and deliver real value, so have examples ready that demonstrate your analytical thinking and creativity.

Understand Capsa's Mission

Familiarise yourself with Capsa's mission to transform private capital firms. Think about how your skills can contribute to their goals and be prepared to share your thoughts on how you can help improve their AI capabilities and agent infrastructure.

Be Ready for a Fast-Paced Environment

Since Capsa is an early-stage startup, they want someone who thrives under pressure. Prepare to discuss how you've managed tight deadlines or high-stress situations in the past, and show your enthusiasm for working in a dynamic setting.