Senior Full-Stack Engineer

The Full Stack Engineer builds and runs the digital surfaces the Commercial STO puts in front of Expereo’s Customers as well as Commercial and Service Preparation teams, front to back: the React front ends, the service layer those front ends consume, and the integrations that connect them to Salesforce and the wider systems landscape.

You will join the Commercial STO, the technology team that owns the systems behind how Expereo quotes, orders, and activates services. A central part of that work is expereoOneNext, the platform that moves request intake, site creation, quoting, order placement, and service activation out of inboxes and spreadsheets and into one place. It is live with its first users and growing, and you will carry features on it from the first conversation with the people who use it to the release that reaches them.

This is a hands-on engineering role with a front-end center of gravity and full-stack reach. You are strongest in React and TypeScript, fluent in the Node.js layer between the browser and the backend, and able to deliver a feature end-to-end, including the service and integration parts. You will read and work in C#/.NET at the integration points with the systems around the platform. You own what you ship, in production, and you are the engineer others on the team rely on to get it right.

Key Responsibilities

Front-end delivery

• Own the React and TypeScript front ends of the surfaces you work on, from component structure and state management to data fetching, caching, and performance.
• Turn requirements from commercial and operations users into production-quality experiences that make their daily work faster and less error-prone.
• Keep the front-end codebase coherent as it grows: shared components, consistent patterns, and a design language that holds across screens.
• Bring the consumer’s view into API design: what the interface needs to look like for the front end to be simple, fast, and correct.

End-to-end feature delivery

• Implement the service layer each feature needs, REST or GraphQL, working contract-first from OpenAPI specifications.
• Build and maintain the integrations with Salesforce and other core systems that commercial data flows through, so that what a user enters on the platform arrives correctly where it is needed downstream.
• Implement authentication and authorization for the features you build, so access is secure by default rather than by exception.
• Keep the interfaces you introduce versioned and backward-compatible; downstream consumers are never broken silently.
• Read and work at the C#/.NET integration points with the wider systems landscape when a feature crosses them.

Delivery and operations

• Own the delivery path for what you ship: configure, deploy, observe, and operate your own surfaces on a managed cloud (AWS), working with the team’s DevOps engineers on the shared pipeline rather than waiting on it.