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Renewable energy, revolutionised for small business.
Senior Staff Engineer – Agent Platform
Location
United Kingdom
Posted
98 days ago
Salary
£129.5K / year
Seniority
Senior
Job Description
Senior Staff Engineer – Agent Platform
tem
• Ship flagship agentic capabilities: Deliver high-impact agentic workflows end-to-end, from discovery through production roll-out, with clear success metrics and fast iteration loops. • Build and operate production-grade agent systems: Design reliable agentic systems that behave predictably under real-world constraints, including latency, cost, data quality, and failure modes, with strong patterns for state management, idempotency, and safe recovery. • Create shared foundations for agent delivery: Develop the core primitives that enable teams to build agents consistently (runtime patterns, tool interfaces, context management, shared libraries) while avoiding one-off implementations. • Establish a pragmatic Agent Development Life Cycle (ADLC): Implement evaluations, guardrails, tracing, monitoring, and release processes so agents can be measured, debugged, and improved continuously. • Integrate ML and LLM components into production workflows: Work with ML/Data teams to productionise models and LLM capabilities with clear contracts, versioning, observability, and safe degradation patterns. • Maintain clear domain boundaries as adoption scales: Define shared semantics for agent tools and data access, preventing domain drift while enabling teams to move quickly. • Collaborate with Platform on infrastructure and developer tooling: Adopt and extend existing CI/CD, DevEx, and observability systems, contributing back where agentic workloads introduce new requirements.
Job Requirements
- Architectural depth: Proven ability to design and evolve complex, stateful distributed systems spanning APIs, event-driven architectures, data systems, and agentic applications - where domain logic is the primary source of complexity. Proven patterns for high-throughput performance and scaling architecture to support hundreds of thousands of customers, while preventing domain drift.
- Proven experience building AI agents in production, not just demos, with a clear understanding of current best practices (agent architectures, tool calling, RAG where appropriate, prompt and context engineering). Ability to run AI/agentic systems reliably in production with observability, incident readiness, and cost controls.
- Deep experience with:
- AWS serverless architecture (Lambda, API Gateway, Event Bridge, Step Functions)
- Event-driven systems and asynchronous workflows
- Strong coding skills: deep hands-on experience with a variety of coding languages, and comfortable with a tech-agnostic approach. Familiarity with Python is a must-have.
- Agent quality discipline: hands-on experience with evaluations (offline and online), regression testing, safety guardrails, and monitoring for reliability, cost, and drift.
- Strong backend and distributed-systems fundamentals: APIs, asynchronous workflows, state management, idempotency, retries, and failure recovery in high-stakes workflows.
- Product & business alignment: Demonstrated ability to connect technical decisions to business outcomes and customer experience.
- First-principles problem solving: Ability to reason from fundamentals (constraints, incentives, data and system behaviour) to design solutions in complex, high-stakes domains.
Benefits
- Competitive salary - our current band for this role is £129,500 or equivalent in local currency.
- Stock Options - everyone on the team has ownership in our mission.
- 25 days holiday + public holidays - Swap public holidays for ones that matter most to you. Plus, get an extra day off for your birthday 🎉.
- Remote & flexible working - We’re fully remote with clear core hours, and no internal meetings on Friday afternoons.
- Home working & wellbeing budgets:
- Up to £1,200 / €1,200 annually to upgrade your remote setup (co-working passes, equipment, etc.).
- Up to £150 / €150 monthly on anything that supports your wellbeing - from therapy to gym memberships to meditation apps.
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