Senior Staff Engineer, tem

• This role combines deep hands-on engineering with strategic technical ownership and organisational influence
• Exceptional technical leadership experience: Experience operating at Staff+ or Senior Staff level, with clear evidence of organisation-wide impact at a high-growth startup
• Architectural depth: Proven ability to design and evolve complex, stateful distributed systems spanning APIs, event-driven architectures, data systems, and front-end 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
• Multi-team influence: Experience leading cross-team initiatives that directly impact revenue across engineering, product, data, machine learning, commercial and ops stakeholders
• Modern tech expertise: Deep experience with:
• Python
• AWS serverless architecture (Lambda, API Gateway, DynamoDB)
• Event-driven systems and asynchronous workflows
• Data + domain modelling strength: Strong ability in data modelling for complex, interdependent business rules, including correctness, consistency, and designing for failure modes
• 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
• Navigating ambiguity: Comfort operating in evolving environments, defining direction where it doesn’t yet exist

Desirable

• We are looking for a Senior Staff Engineer to help shape and scale Rosso: tem’s core IP transaction infrastructure that saves our customers millions
• Rosso brings together forecasting, margin and portfolio optimisation to price tender inputs through to contract, while keeping the portfolio balanced as we grow
• Rosso sits on the critical path for revenue and customer experience
• You will join a team with strong product vision and technical leadership, and you will play a key strategic role in tendering and the deal flow that drives it, bringing senior execution strength
• This means owning complex deliveries end-to-end, raising system quality and reliability, and preventing domain drift as the platform and organisation scale
• Drive Technical Leadership through Execution: Alongside Principal Engineers, you will lead and ship high-impact improvements across Rosso workflows, improving correctness, operability and scalability as volume and complexity grow
• Drive Multi-Team Initiatives: Lead complex, cross-functional efforts across teams and systems - aligning stakeholders and delivering high-leverage outcomes
• Build & Ship: Continue being deeply hands-on in designing, coding, and reviewing critical components across stateful backend services, APIs, and infrastructure
• Strengthen Foundations: Improve reliability and operability, observability, testing strategy, and deployment practices - driving monitoring of service objectives, incident reduction, and operational excellence
• Integrate machine learning models into production: Partner with ML/Data teams to productionise a range of models (including forecasting, optimisation and pricing) safely and effectively within core Rosso workflows
• Design for correctness in complex workflows: Build and evolve pricing and deal-flow workflows where consistency and failure handling are first-class concerns
• Prevent domain drift: Create and maintain clear domain boundaries, shared language, and reduce compounding complexity over time
• Multiply Impact: Mentor Staff and Senior Engineers, raise engineering standards, and act as a trusted technical advisor to leadership
• Plan for Scale: Architect systems to handle high-volume quoting/pricing activity and large customer counts, anticipating bottlenecks before they emerge

• Our processes normally take around 2-3 weeks from first call to offer - please let us know about any adjustments to timelines that may be required
• First call with our Talent Team (30 Mins). This is to understand your experience, motivations, and discuss the role in more detail
• Behaviour Interview with our Engineering Managers (60 Mins). This is your chance to really understand the role, the expectations, and ensure alignment on ways of working
• Technical Interviews with the Team (2 x 90 Mins). You’ll meet with potential peers in this session and will discuss technical topics and experiences
• Culture-Add Interview with Stakeholders (45 Mins). The final session will be with two cross-functional stakeholders, and will explore how your values align with ours, and is designed to be a genuine two-way conversation, your chance to understand what it’s really like to work at tem