Staff Full Stack Engineer – Sell Side Engine

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. Own architecture-level decisions on integration-heavy systems connecting Origination & New Products to Rosso, Data, and Billing .

Posted 10/2/2026full-timeRemote • United KingdomLead💰 £104,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates deep technical expertise in backend and systems design, with a proven track record of delivering complex, integration-heavy systems. Capable of transforming ambiguous problems into actionable plans while mentoring engineers and contributing to team practices.

Highest-signal resume keywords

Backend Systems DesignPython ProgrammingAWS Serverless (Lambda, API Gateway, DynamoDB, EventBridge)Event-Driven ArchitecturesProduct Delivery Experience

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

Backend Systems DesignPython ProgrammingEvent-Driven ArchitecturesWorkflow OrchestrationReal-Time Pricing Engines

Soft Skills

Problem SolvingMentoring EngineersCollaboration

Tools & Technologies

AWS ServerlessReactTypeScript

Industry Keywords

EnergyFintechRegulated Commercial Domain

Tech Stack

Tools & technologies

AWSDynamoDBPythonReactTypeScript

About the role

Key responsibilities & impact

Own architecture-level decisions on integration-heavy systems connecting Origination & New Products to Rosso, Data, and Billing
Help ship the first new product category live and generating qualified pipeline within 6 months
Help automate tendering processes to increase quote capacity
Productise a manual, error-prone pricing process
Design deal-gating risk tooling for new commercial risk categories
Turn commercially driven, undefined problems into shippable plans
Deliver integrations across teams without direct authority over those teams
Design, build, and ship difficult parts of the new-product sequence
Build primarily backend systems while contributing to the React/TypeScript frontend when needed
Write clean, well-tested code
Contribute to code reviews and improve team practices and documentation

Requirements

What you’ll need

Deep technical depth in backend and systems design
Track record of owning architecture-level decisions on complex, integration-heavy systems
Experience with Python, AWS serverless (Lambda, API Gateway, DynamoDB, EventBridge), and event-driven architectures
React/TypeScript exposure is a plus
Ability to turn an ambiguous problem into a shippable plan
Experience delivering work where a critical dependency sits with a team you have no authority over
Proven product delivery experience as a Full Stack or Backend Engineer in a startup or fast-paced product environment
Ownership of complex projects from start to finish
Experience mentoring engineers or setting technical direction is desirable
Experience in energy, fintech, or another regulated, high-stakes commercial domain is desirable
Exposure to workflow orchestration, event-driven systems, or real-time pricing engines is desirable
Experience originating new product lines from scratch is desirable
Fluency in spoken, written, and read English

Benefits

Comp & perks

Stock options
25 days holiday plus public holidays
Ability to swap public holidays for other days
Extra day off for your birthday
Fully remote and flexible working
Clear core hours
No internal meetings on Friday afternoons
Up to £1,200 / €1,200 annually for remote setup, co-working passes, and equipment
Up to £150 / €150 monthly wellbeing budget for therapy, gym memberships, meditation apps, and similar expenses