Back End Engineer (f/m/d) in London

Back End Engineer (f/m/d) in London

London Full-Time 63000 - 77000 £ / year (est.) Home office (partial)
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At a Glance

  • Tasks: Lead backend services and integrations for innovative AI-powered SaaS applications.
  • Company: Join a pioneering tech company backed by top VCs, focused on societal challenges.
  • Benefits: Competitive salary, share options, private healthcare, and flexible hybrid working.
  • Other info: Dynamic team culture with excellent career growth and regular social events.
  • Why this job: Make a real impact with cutting-edge AI tools while solving complex operational challenges.
  • Qualifications: Strong backend/API experience in Python or TypeScript; SQL skills required.

The predicted salary is between 63000 - 77000 £ per year.

It is a societal one. These companies face unique, complex challenges that typical software was never designed to solve. Our mission is to give critical industries their own AI-powered Software Factory: a way to build and deploy bespoke digital tools that solve pressing operational challenges. We’re backed by leading VCs, including Notion Capital and Hoxton Ventures, and we’re building a world-class team to take on one of the most important challenges of our time. We are committed to building a diverse team that reflects the industries and societies we serve.

You will lead the implementation and delivery of backend services, integrations, and workflow logic that power our SaaS applications. Rather than reinventing the wheel, you will leverage our existing AI-Software Factory platform to build robust, scalable tools for our customers. We are pioneering a new way of working: you will use advanced AI workflows to accelerate routine development, allowing you to focus on high-value problem-solving, validating automated outputs, and solving complex integration challenges.

  • Build and own core backend features and critical API integrations (Python, FastAPI, SQL).
  • Design and implement complex data pipelines and workflows using tools like Dagster and Temporal.
  • Champion the use of AI-assisted tools to plan, scaffold, and refactor code efficiently.
  • Collaborate with Solution Strategists and Platform teams to ship value to customers faster.

We look for strength in backend engineering and a curiosity to learn the rest. Strong backend/API experience (Python or TypeScript); SQL and data modelling skills. Familiarity with (or keen interest in) agentic AI coding tools (e.g., experience integrating with other systems like SFTP, SharePoint, or webhooks; workflow orchestration and data engineering experience (e.g. familiarity with CI/CD, Docker, cloud (Azure/AWS/GCP). Interest in AI and raising team AI skills.

Competitive salary and share option plan ~25 days annual leave, plus public holidays ~ Excellent pension scheme, fixed at 7.5% ~ Private healthcare, including family cover and pre-existing conditions ~ Flexible hybrid working with 2 days per fortnight in our Farringdon office ~ Regular social events and offsites ~ Access to a gym and fitness classes in our office building.

Back End Engineer (f/m/d) in London employer: Cogna

Cogna is an exceptional employer that fosters a dynamic work culture where innovation and collaboration thrive. As we transition from startup to scale-up, employees are offered unique growth opportunities, including hands-on experience in shaping AI-driven products that impact thousands of users. Our commitment to commercial awareness alongside product excellence ensures that every team member plays a vital role in our journey towards success.

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Contact Details:

Cogna Recruitment Team

We think you need these skills to ace Back End Engineer (f/m/d) in London

Backend Engineering
API Development
Python
FastAPI
SQL
Data Modelling
AI-assisted Tools