Lead Software Engineer (Python)

• The Lead Engineer will build and extend platform capabilities using Python, including APIs, integrations and backend services.

• Implement testing and evaluation frameworks covering prompt quality, agent behaviour, and output reliability.

• Apply modern AI technologies where appropriate, such as RAG/GraphRAG, knowledge graphs, vector databases and data pipelines.

• Architect scalable, cost-effective solutions that balance innovation with constraints such as compliance, performance and security.

• Lead technical discussions and support less experienced engineers.

• Solve complex problems across a wide variety of client environments.

• Contribute to a culture of learning, coaching and technical excellence.

MCS Group, are seeking a Lead Software Engineer with deep commercial experience in Python for an exciting new role in a scaling technology company. A perfect opportunity for a senior Python engineer who wants to build real, high-impact AI systems and have true autonomy in an exciting organisation., * You'll have strong experience as a software engineer, ideally building production-grade applications and products in Python

• You'll have an interest in AI and an awareness of LLM APIs, including function calling, prompt engineering and evaluation.
• Proven backend/API development experience with FastAPI or similar.
• Comfortable working within agile engineering teams.

• Up to £85,000 with a leading benefits package which includes amazing annual leave entitlement (one of the best in the private sector) and share options.

To speak in absolute confidence about this opportunity, please send an up-to-date CV via the link provided or contact Chris Busby, Associate Director - IT Recruitment, at MCS Group

Muse Group

Muse Group empowers music makers. We create the world’s most popular content, apps and platforms for playing, recording and composing music.

Through our expansive music catalogs, educational expertise, innovative learning tools and free open-source software, we make it easier for millions — from beginners to experienced musicians — to be creative every day. 

The Muse community is now over 400 million strong. And we’re just getting started. 

Our future vision is of a world with over a billion music makers — and we have a drive to expand our influence into other creative spaces too.

What do we make?

We make essential resources for all kinds of creatives, from performers to podcasters. Learn more about the leading Muse Group products here.

Who are we?

Muse Group began life as Ultimate Guitar, the largest online global community of musicians. Eugeny Naidenov founded Ultimate Guitar in 1998, with a dream to make it easy for guitarists to play songs by Guns ‘N’ Roses and his other favorite rockers. From there, the site grew from a plucky, tab-sharing trailblazer into a global leader of online music publishing. 

In 2017, Ultimate Guitar acquired MuseScore, expanding its reach into sheet music. Muse Group has only continued to grow from there — and now includes Audacity, StaffPad and many more. 

In 2023, Muse Group acquired Hal Leonard, the legendary global sheet music publishers, adding an unparalleled music catalog and educational expertise to the team.

Today, we are an international, visionary team of creatives, music lovers and audio obsessives, developing products we could not live without.