Staff Full Stack Engineer (Buy Side Growth)

Requirements

• Strong technical leadership: a track record of setting technical direction for a team or project, and getting others to commit to it through the credibility of your work, not through a management title
• Track record in fast-paced environments: experience as a Senior or Staff Engineer in a high-growth startup or scale-up, with a strong bias toward shipping
• System design at scale: proven ability to design and build complex systems that power both back-end automation and front-end experiences
• Modern tech expertise: deep experience with Python (FastAPI) and modern JavaScript/TypeScript frameworks such as React
• Product-minded mindset: experience working closely with product and design teams to solve user problems, not just deliver features
• Can deal with ambiguity: comfortable navigating changing priorities and incomplete information to make strong technical decisions, particularly useful for a squad like Customer Autopilot that's still pre-discovery
• (Desirable) Agentic or agent-building experience: exposure to designing multi-agent workflows or systems, which is central to Buy-Side's long-term direction
• (Desirable) Exposure to the energy sector or other regulated industries
• (Desirable) Experience building internal tools or platforms for brokers, sales teams, or support agents
• (Desirable) Familiarity with real-time data processing systems
• If you're excited about this role but not sure you meet every requirement, we'd still love to hear from you

What the job involves

• We're hiring a Staff Full Stack Engineer to act as embedded technical leader for one of Buy-Side Growth's engineering squads
• Buy-Side is organised into four dedicated squads, each built around a single technical leader: Self-Driving Tendering, Price Everywhere, Broker Self-Serve, and Customer Autopilot, supported by a cross-squad Architect who owns the Buy Engine and tendering service
• Two of those squads - Broker Self-Serve and Customer Autopilot - don't yet have a technical leader in place, which is the clearest gap in the team today. This role exists to close that gap: to be the person a squad looks to for architecture calls, technical direction, and the judgement to pick the right bets, without needing to be a people manager to do it
• The bigger picture: Buy-Side's vision is an engine that increasingly runs itself - agents handling tendering, pricing, and customer experience end to end, so the team can serve many more brokers and customers without headcount scaling in step
• You’ll be building directly toward that, on a team that already ships in dedicated, focused squads rather than one team context-switching across everything
• In your first 12 months, you might:
• Step in as the embedded technical leader for a squad - most likely Broker Self-Serve or Customer Autopilot, both currently short a technical lead
• Take Customer Autopilot from pre-discovery to a shipped first version, setting its technical direction from scratch
• Extend the multi-broker tendering work that Self-Driving Tendering has already shipped, or push further into Price Everywhere, currently the team's biggest strategic bet
• Mentor the engineers around you, raising the technical bar for your squad through code review, architecture proposals, and the credibility of your own delivery
• Help design the agentic workflows that let Buy-Side handle dramatically more tenders and customers per person than it can today
• Responsibilities:
• Build with impact: Architect and deliver end-to-end systems, from internal automation to broker- and customer-facing portals, ensuring they are scalable, fast, and user-friendly
• Lead the technical direction: Propose and own the technical direction for your squad, picking the right architectural bets and building the credibility to get others to act on your recommendations
• Own the platform: Improve and extend core platforms and tooling, making it easier for your squad and others to build, test, and ship quality software
• Drive innovation: Rapidly prototype and iterate on new workflows and product ideas that expand our offering and improve the broker and customer journey
• Raise the bar: Mentor other engineers and teach your domain through code reviews and hands-on collaboration, without needing a formal management line to do it