Role: Principal Software Engineer / Architect (Python)

Location: London, Hybrid

Salary: Above market rate, circa £180k-£300k

This must be the most interesting Software Architect role in Europe right now. This is a chance to work with a real-world leader that arent just changing the game, they are creating it. Greenfield opportunities are rare, coupled with the chance to work with some of the brightest minds globally. Your peers have helped scale some of the fastest growing brands globally.

Operating within a Financial / Investment style organisation, but experience here isnt essential. The business is agile and nimble and wont suit large FS backgrounds. Would be well suited to someone thats worked for a big Tech - Meta, Snap, Google or high growth UK Tech such as Deliveroo, Trainline or any business that has scaled rapidly.

This position provides a unique opportunity to contribute to cutting-edge initiatives involving modern data stacks, AI-driven systems, and scalable cloud-based architectures. The ideal candidate will balance strategic oversight with hands-on development to ensure the successful delivery of impactful solutions.

Were looking for someone that can build real things, that scale, from scratch. Very comfortable with Microservices, APIs, Python and scalable Architectures.

Key Responsibilities

• Architectural Leadership:Design and guide the implementation of scalable, maintainable, and secure software architectures, ensuring alignment with organizational objectives.
• Hands-On Development:Actively participate in the development process, writing high-quality, production-grade code where necessary.
• Technology Strategy:Define and evolve the technology stack, incorporating modern tools and frameworks to support AI, ML, and data-driven workflows.
• Cross-Team Collaboration:Work closely with engineering, data science, and business teams to gather requirements, define solutions, and deliver end-to-end systems.
• Cloud and Distributed Systems:Architect and optimize solutions leveraging cloud platforms and distributed computing frameworks.
• Modern Data Infrastructure:Collaborate with the data platform and data science teams to integrate with systems like Snowflake, dbt, and distributed analytics tools such as PySpark.
• Code and System Quality:Define and enforce coding standards, design principles, and system architecture best practices to ensure high-quality outcomes.
• Emerging Technologies:Evaluate and recommend emerging technologies (e.g., LLMs, RAG systems, vector databases) to drive innovation and maintain technical excellence.
• Security and Compliance:Demonstrate a track record of ensuring security and compliance in high-security, highly regulated environments, while driving innovation and maintaining agility.

Skills / Experience:

• NEED - either Founding Principal / Architect within a high growth scale-up.
• Demonstrable experience building Architecture and Systems heavily Microservice / API driven from the ground up.
• Hands on, very strong Python experience.

This role is hybrid London, with a split between office and home working. Well suited to a hands-on Principal Architect or Engineer.

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