Staff Full Stack Engineer - Buy-Side Growth

The role

A Staff Full Stack Engineer will act as an embedded technical leader for a Buy-Side Growth engineering squad. You will set technical direction, architect end-to-end systems, and mentor engineers to build agentic workflows.

What you will do

• Architect and deliver end-to-end systems from internal automation to customer-facing portals
• Propose and own the technical direction for your squad
• Improve and extend core platforms and tooling
• Rapidly prototype and iterate on new workflows and product ideas
• Mentor other engineers through code reviews and hands-on collaboration

Required qualifications

• Track record of setting technical direction for a team or project
• Experience as a Senior or Staff Engineer in a high-growth startup or scale-up
• Ability to design and build complex systems for back-end automation and front-end experiences
• Experience participating in and leading customer discovery calls
• Ability to navigate changing priorities and incomplete information

Nice to have

• Deep experience with Python (FastAPI) and modern JavaScript/TypeScript frameworks such as React
• Agentic or agent-building experience
• Exposure to the energy sector or other regulated industries
• Experience building internal tools or platforms for brokers, sales teams, or support agents
• Familiarity with real-time data processing systems

Benefits

• Competitive salary
• Stock Options
• 25 days holiday + public holidays
• Swap public holidays for ones that matter most to you
• Extra day off for your birthday
• Remote & flexible working
• No internal meetings on Friday afternoons
• Up to £1,200 / €1,200 annually to upgrade your remote setup
• Up to £150 / €150 monthly on wellbeing

About the company

tem is a technology company rebuilding the energy transaction to be transparent and fair. They are a 160+ person team powered by over £94M in total funding.