GAIN - Software Engineer
About The Position
GAIN is a creative-led, insight-driven company that blends data, tech and creativity. We believe the best ideas emerge where intelligence and creativity unite, where insight sparks imagination, and where innovation turns possibility into progress. We are explorers of new frontiers, shaping bold strategies that move people, brands, and businesses forward. Individually and together, our specialist teams provide the vision, data, and confidence brands and organisations need to make braver, more impactful decisions. Today as GAIN, we work as a united force, using data to fuel creativity, and technology to unlock new possibilities. As imagineers we don’t just embrace innovation – we engineer it, transforming information into action, and ideas into breakthroughs. This is where rebel thinking, smart technology, and data-driven creativity shape the future. Through our five specialist teams, Creative Studio, Conversion, Customer Science, Experience and Performance. Individually, and together, we work to fuel growth and deliver measurable impact. What we’re building The way software works is changing. AI agents are moving from demos to real workflows, tools that don't just answer questions but help people do their jobs better. We're building that for marketing. Think about how tools like Cursor or Claude Code changed what's possible for engineers. We're creating the same kind of intelligence layer for marketing teams, a suite of products that help them move faster, see clearer, and make better decisions. We're a small team shipping fast. This is the stage where the right engineers can shape what this becomes.
Requirements
- Excited about building with AI, not just using it, but making it work reliably in real products
- Strong fundamentals: systems, APIs, databases, how data flows
- Comfortable in TypeScript/JavaScript or Python
- You've shipped modern web products (UI + API + data)
- You'd rather deliver something imperfect and improve it than plan forever
- AI-native development: You use coding agents to move faster without outsourcing judgment. You can integrate LLM capabilities responsibly, think about failure modes, and own what you ship.
Responsibilities
- Shipping end‑to‑end product features (UI + API + data + integrations)
- Building LLM-powered workflows that are reliable, measurable, and user-friendly
Benefits
- Private Medical Insurance
- BUPA Life Assurance
- Income protection
- Employee Assistance Programme
- Cycle to Work salary sacrifice scheme
- Tech & Wearables salary sacrifice scheme
- Octopus EV Scheme
- Discounts and deals on a range of items from hotels, holidays and hormone testing to cinema, gyms and will writing
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What This Job Offers
Job Type
Full-time
Career Level
Mid Level
Education Level
No Education Listed
