Senior Software Engineer (C# / JavaScript)

Senior Software Engineer Location: UK Remote / Hybrid Salary: up to £80,000 Financial Times' fastest-growing software company in Europe, this is an AI and automation platform — used by thousands of people, every single working day. Founded in 2020, they've grown to 90 people and were voted one of The Sunday Times' Best Places to Work. The engineering team is small enough that your decisions matter, large enough that you're not doing it alone. This is a senior, hands-on engineering role — not a stepping stone to management, though it can be if that's where you want to go. You'll own complex technical work end-to-end, shape architecture and engineering standards, and raise the quality of the team around you. Python backend services, Svelte and jQuery frontend, AWS infrastructure, Chrome and email extensions, CRM integrations, and OpenAI-powered automation workflows. Impact here is measured by the quality of the whole team's output, not just your own. Making architectural and implementation decisions across the engineering stream * Writing maintainable, predictable, scalable code (and expecting the same from others) * Conducting code reviews that improve both the code and the engineer who wrote it * Mentoring junior engineers on implementation, design patterns, and engineering practice * Improving deployment reliability, monitoring, and observability * Communicating trade-offs and risks clearly — to engineers and non-engineers alike * Strong professional experience with Python backend development * Frontend experience with Svelte and/or jQuery * AWS cloud infrastructure * OpenAI APIs or LLM-powered application development * CRM integrations * Over time, senior engineers at this company become trusted owners of complex systems, lead technical initiatives involving multiple engineers, and raise standards across their stream through mentoring and technical leadership. 25 days annual leave plus public holidays MacBook and any additional tech or software you need Flexible working arrangements Private Health, Dental, and Vision Insurance through Aviva Extended mental health cover and Employee Assistance Programme Compassionate leave policy Private pension contributions (Royal London) Monthly company social events