Full Stack Engineer

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Staff Full Stack Engineer - Sell Side Engine based in Switzerland.

This is a highly hands-on Staff Engineer role focused on solving complex technical problems within a rapidly scaling energy technology environment. You will join a small, high-impact product squad responsible for rebuilding the systems that support renewable energy origination, contracting, onboarding, and growth. The role combines deep backend and systems engineering with the flexibility to contribute to frontend development when needed.

• Own architecture-level decisions for complex, integration-heavy systems, clearly defining system boundaries, contracts, dependencies, and failure modes.
• Design and build the technical foundations connecting new-product initiatives with pricing, settlement, data, billing, and other core platforms.
• Take commercially driven and sometimes ambiguous problems, define practical technical approaches, and turn them into shippable plans.
• Help develop and launch new product categories, contributing to the technical work required to bring new offerings from concept through production.
• Automate and productise tendering, pricing, contracting, onboarding, and other manual workflows.
• Design deal-gating and risk-management tooling.
• Work effectively across organizational boundaries, delivering integrations and technical outcomes.
• Build high-quality software across backend services and, when appropriate, contribute to React and TypeScript frontend development.
• Write clean, maintainable, and well-tested code, participate actively in code reviews.
• Help measure and improve the reliability, scalability, and business impact of the systems you build.

• Deep technical expertise in backend engineering and systems design.
• Strong professional experience with Python and AWS serverless technologies, including Lambda, API Gateway, DynamoDB, and EventBridge.
• Solid understanding of event-driven architectures and distributed systems.
• Full Stack or Backend Engineering experience in a startup, scale-up, or fast-paced product environment.
• Ability to work effectively without a complete specification.
• Demonstrated experience delivering projects where critical dependencies are owned by other teams.
• Strong product mindset.
• Comfortable working hands-on across the stack, with React and TypeScript experience considered a plus.
• Strong engineering judgment, attention to quality, and ability to reason about scalability, reliability, system boundaries, and failure modes.
• Excellent communication and collaboration skills.
• Experience mentoring engineers or setting technical direction is desirable.
• Experience in energy, fintech, or another regulated or high-stakes commercial environment is advantageous.
• Exposure to workflow orchestration, real-time pricing engines, or event-driven systems is a plus.
• Experience creating new product lines or technical capabilities from scratch is highly desirable.

• Competitive base salary of £104,000, or the equivalent in local currency.
• Compensation benchmarked against role and level, with pay adjustments based on demonstrated evidence.
• Stock options.
• 25 days of annual holiday plus public holidays, with the flexibility to exchange public holidays for alternative days.
• Additional day off for your birthday.
• Fully remote and flexible working environment with clear core hours.
• No internal meetings on Friday afternoons.
• Up to £1,200 / €1,200 annually for home-working and remote setup expenses.
• Up to £150 / €150 per month for wellbeing expenses.
• Inclusive environment welcoming people from diverse backgrounds, experiences, and identities.