Staff Full Stack Engineer (Sell Side Engine)

Requirements

• Deep technical depth in backend and systems design, with a track record of owning architecture-level decisions on complex, integration-heavy systems

• Comfortable in our core stack: Python, AWS serverless (Lambda, API Gateway, DynamoDB, EventBridge), and event-driven architectures. React/TypeScript exposure is a plus but not the bar

• Comfort operating without a full spec: able to take a defined slice of an ambiguous problem and turn it into a shippable plan

• Experience delivering work where a critical dependency sits with a team you have no authority over

• Proven product delivery experience: experience as a Full Stack or Backend Engineer in a startup or fast-paced product environment, with ownership of complex projects from start to finish

• (Desirable) Prior experience mentoring engineers or setting technical direction, even without a formal leadership title. Not required. We’d rather have a brilliant engineer who has never led a squad than a mediocre one who has

• (Desirable) Experience in energy, fintech, or another regulated, high-stakes commercial domain

• (Desirable) Exposure to workflow orchestration, event-driven systems, or real-time pricing engines

• (Desirable) Experience originating new product lines from scratch rather than only scaling existing ones

What the job involves

• We're hiring a Staff Software Engineer to join Origination & New Products, a new three-person squad inside Sell Side Growth

• Sell Side Growth originates, contracts, and retains the renewable generators whose volume powers our platform - without generators, there's no product

• The engine is scaling fast, and much of the manual process underneath today's pipeline - tendering, contracting, onboarding - needs to be rebuilt to handle that growth rather than buckle under it

• This is a deep, hands-on IC role, not a squad-lead one - that's owned by the Staff/Senior Staff engineer leading the initiative

• You're free to go all-in on the hardest technical problems: integration with Rosso (our pricing and settlement engine), Control Room (our core tendering and pipeline platform), and the deal-gating risk tooling that lets us take on genuinely new categories of commercial risk safely

• We're not hiring for leadership polish here

• We're hiring a ridiculously good engineer

• Go deep on hard systems: Own architecture-level decisions on integration-heavy systems, reasoning clearly about boundaries, contracts, and failure modes

• Build for ambiguity: Take a piece of an undefined, commercially-driven problem and turn it into a shippable plan, within the direction your squad lead sets