Senior Software Engineer - Fullstack

About the role

As a Senior Software Engineer you will build the products our customers rely on to make multi‑million‑dollar media decisions. You will work across the full stack – from responsive React/Next.js front‑ends to Python‑based micro‑services – and help shape system design and infrastructure as the platform scales.

Key responsibilities

• Design, develop and maintain end‑to‑end full‑stack features, including UI/UX, backend services and APIs.
• Contribute to system architecture and infrastructure decisions to support rapid scaling.
• Participate in the full software development lifecycle: planning, implementation, release, monitoring and maintenance.
• Write clean, well‑tested, maintainable code and champion engineering best practices.
• Collaborate with product managers, designers and AI agents to translate specifications into production‑ready software.

Required profile

• 5+ years of professional experience as a full‑stack or senior software engineer.
• Strong hands‑on experience with modern JavaScript frameworks (React.js or Next.js) and Python micro‑services.
• Proven ability to contribute to system design and infrastructure decisions.
• Experience working in agile, high‑autonomy teams and delivering quality at speed.
• Enthusiasm for learning new technologies and a proactive ownership mindset.

Required skills

• React.js / Next.js
• Python
• Micro‑services architecture
• REST and GraphQL APIs
• AI‑assisted development (spec‑driven AI workflows)

What we offer

• Competitive salary
• Access to Blenheim Chalcot’s global venture‑builder network and mentorship.
• Flexible benefits including private medical, life assurance and pension scheme.
• 25 days paid holiday plus birthday off.
• Quarterly team socials and a collaborative, inclusive culture.