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Expereo

Senior Frontend Software Engineer

Expereo

Software Engineer developing modern front-end applications, integrating with APIs for Expereo's internet connectivity solutions. Part of a dynamic, outcome-driven squad in Barcelona, Spain.

Posted 7/22/2026full-timeBarcelona • 🇪🇸 SpainSeniorWebsite

Core Competencies

Role fit
Core Competencies

Use this summary to align your resume positioning with the role.

Demonstrates strong proficiency in JavaScript and TypeScript, with extensive experience in building responsive web applications using React and integrating with REST APIs and GraphQL. Emphasizes a code-first, automation-first approach while ensuring adherence to performance, accessibility, and security standards.

Highest-signal resume keywords
JavaScript ProficiencyReact Framework ExperienceAutomated Testing FrameworksCI/CD Pipeline FamiliarityComponent-Based Architecture Understanding

ATS Keywords

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Applicant Tracking System Keywords

Tip: use these terms in your resume and cover letter to boost ATS matches.

Hard Skills
JavaScriptTypeScriptReactReduxREST APIsGraphQLAutomated TestingAccessibility StandardsC#.Net Core
Soft Skills
Builder MentalityStrong Ownership
Tools & Technologies
ViteBabelJestCypressPlaywrightTailwindMendixSalesforceAWS
Industry Keywords
Component LibrariesDesign SystemsObservability ToolingAgentic AIData-Driven UX

Tech Stack

Tools & technologies
AWSBabelCloudCypressGraphQLJavaScriptJestMicroservicesReactReduxTypeScript

About the role

Key responsibilities & impact
  • Build and maintain dynamic, responsive web applications using modern front‑end frameworks (React).
  • Develop reusable UI components, design systems, and cross‑STO shared libraries.
  • Integrate front‑end applications with internal/external APIs and platform services.
  • Ensure front‑end applications meet the highest standards of performance, accessibility, and security.
  • Implement automated testing across unit, integration, and end‑to‑end layers.
  • Build observability into user‑facing applications, enabling proactive monitoring and rapid issue resolution.
  • Promote consistent coding patterns and architectural standards across squads.
  • Contribute to CI/CD pipelines for front‑end delivery, including build optimization and automated quality gates.
  • Drive improvements that reduce manual processes and accelerate release cycles.
  • Support Partner with designers, architects, and back‑end engineers to explore new product capabilities.
  • Support initiatives like agentic AI enablement, data‑driven UX, and programmable network experiences.
  • Contribute to reference implementations and front‑end engineering guardrails.

Requirements

What you’ll need
  • Strong proficiency with JavaScript and TypeScript.
  • Experience with modern frameworks such as React
  • Understanding of component‑based architecture and state‑management patterns (Redux, Zustand, Vuex, etc.).
  • Experience integrating with REST APIs, GraphQL and microservices.
  • Familiarity with front‑end build tools (Vite, Babel,..) and CI/CD pipelines.
  • Familiarity with css frontends (Tailwind, Bulma, ...)
  • Knowledge of automated testing frameworks (Jest, Cypress, Playwright).
  • Understanding of accessibility (WCAG), UI performance tuning, and responsive design.
  • Knowledge of C# /.Net Core
  • Exposure to agentic AI Experience with design systems or component libraries (Storybook, MUI, Chakra).
  • Exposure to agentic AI concepts or data‑driven UI architectures.
  • Familiarity with AI Agents and tools (Cursor, Claude Code, Codex)
  • Familiarity with programmable networks or observability tooling.
  • Experience with low‑code platforms (Mendix, Salesforce).
  • Understanding of security best practices in the front‑end (content security policy, dependency scanning, RBAC patterns).
  • Familiarity with AWS cloud infrastructure and services
  • Builder mentality with strong ownership.
  • Code-first, automation-first approach.
  • A full-stack learning approach to ensure team resilience.

Benefits

Comp & perks
  • A dynamic, international work environment with growth opportunities
  • Exposure to cutting-edge technologies and large-scale global networks
  • Learning and development support to build your career in product management
  • Competitive compensation and local benefits