Senior Full-Stack Engineer: React/TypeScript & End-to-End

Expereo International; Barcelona; Hybrid; EUR 65,000 - 95,000; Full time

Benefits offered by this job

Hybrid Working

Competitive compensation

Local benefits

Job summary

Expereo International is seeking a Full Stack Engineer to join the Commercial STO, driving front-end React/TypeScript and the Node.js service layer, with strong ties to Salesforce integrations. You will own features end-to-end from API design through production deployment, collaborating with product, operations, and architecture teams.

You will work across platforms, reading C#/.NET integration points and ensuring secure, versioned interfaces, with CI/CD and AWS-based operations to support

Qualifications

• Five plus years of professional software engineering experience.
• Production React and TypeScript front ends as core stack.
• Node.js and TypeScript services in production.
• REST and/or GraphQL APIs implemented with contract-first OpenAPI.
• Ownership of the delivery path with CI/CD on a managed cloud.
• Read/write C#/.NET integration points.

Responsibilities

• 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.
• 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.
• Implement the service layer each feature needs, REST or GraphQL, working contract-first from OpenAPI specifications.
• Build and maintain integrations with Salesforce and other core systems so data flows correctly downstream.
• Implement authentication and authorization for the features you build, ensuring secure by default.
• Keep interfaces versioned and backward-compatible; downstream consumers are never broken silently.
• Read and work at the C#/.NET integration points with the wider systems landscape.
• Own the delivery path for what you ship: configure, deploy, observe, and operate on a managed cloud with CI/CD.
• Write tests and drive automated quality gates in CI.
• Diagnose and resolve production issues on the surfaces you own.
• Maintain living technical documentation: API specs, architecture decisions, and integration guides.
• Collaborate across product owners, quote management, service operations, architect, and other engineering teams.

Skills

React

TypeScript

Node.js

OpenAPI

CI/CD

Git

Tools

Salesforce

AWS

OpenAPI

C#/.NET

Job description

Expereo International is seeking a Full Stack Engineer to join the Commercial STO, driving front-end React/TypeScript and the Node.js service layer, with strong ties to Salesforce integrations. You will own features end-to-end from API design through production deployment, collaborating with product, operations, and architecture teams.

You will work across platforms, reading C#/.NET integration points and ensuring secure, versioned interfaces, with CI/CD and AWS-based operations to support