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Expereo

Senior Full-Stack Engineer

Expereo

. Build and run Expereo’s digital surfaces for customers and commercial and service operations teams, including React front ends, service layers, and integrations.

Posted 10/2/2026full-timeKatowice • PolandSenior💰 €70,000 - €85,000 per yearWebsite

Core Competencies

Role fit
Core Competencies

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Demonstrates expertise in building and maintaining React and TypeScript front ends, along with proficiency in REST and GraphQL APIs. Capable of integrating with Salesforce and managing cloud operations on AWS while ensuring high-quality software engineering practices.

Highest-signal resume keywords
React Front End DevelopmentTypeScript Services in ProductionREST and GraphQL API ImplementationAWS Cloud Configuration and DeploymentSalesforce Integration Experience

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Applicant Tracking System Keywords

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Hard Skills
ReactTypeScriptNode.jsREST APIsGraphQLOpenAPIC#/.NETAWSOAuth2Event-Driven Architecture
Soft Skills
CollaborationProblem-SolvingCommunication
Tools & Technologies
GitCI/CDAmplifyLambdaAPI GatewayCognitoS3
Industry Keywords
SD-WANSASENetwork PlatformDomain Background

Tech Stack

Tools & technologies
AWSCloudGraphQLJavaScriptKafkaNode.jsReactTypeScript.NET

About the role

Key responsibilities & impact
  • Build and run Expereo’s digital surfaces for customers and commercial and service operations teams, including React front ends, service layers, and integrations.
  • Deliver features for the expereoOneNext platform from user discovery through production release.
  • Own React and TypeScript front ends, including component structure, state management, data fetching, caching, and performance.
  • Translate commercial and operations requirements into production-quality user experiences.
  • Maintain shared components, consistent patterns, and a coherent design language.
  • Implement REST or GraphQL service layers using contract-first OpenAPI specifications.
  • Build and maintain Salesforce and core-system integrations.
  • Implement authentication and authorization, and maintain versioned, backward-compatible interfaces.
  • Read and work at C#/.NET integration points.
  • Configure, deploy, observe, and operate owned surfaces on AWS with DevOps engineers.
  • Use feature flags, write tests, and drive automated CI quality gates.
  • Diagnose and resolve production issues affecting order and activation flows.
  • Maintain API specifications, architecture decision records, and integration guides.
  • Collaborate with product owners, quote management, service operations, architects, and engineering teams.
  • Participate in design reviews, sprint reviews, technical decisions, code reviews, and onboarding.

Requirements

What you’ll need
  • Five plus years of professional software engineering, with production React and TypeScript front ends as your core stack.
  • Node.js and TypeScript services in production.
  • REST and/or GraphQL APIs implemented and consumed in production, with contract-first OpenAPI as a working method.
  • Experience configuring, deploying, observing, and operating work on a managed cloud, with CI/CD.
  • Software engineering discipline including testing, code review, Git, feature flags, and reproducible builds.
  • Ability to work in a mixed-language environment and read, understand, and be willing to write C#/.NET at integration points.
  • Integration experience with Salesforce, including data models and APIs.
  • Practical AWS experience, including Amplify, Lambda, API Gateway, Cognito, S3, or equivalent.
  • Practical OAuth2 and OIDC experience, including scope models and token lifecycle.
  • C#/.NET backend exposure.
  • Event-driven or asynchronous integration experience with queues, SQS, EventBridge, Kafka, or similar.
  • Front-end architecture experience beyond a single application, such as micro front ends or module federation.
  • Experience with DDD, CQS, event-driven architectural patterns, C4 diagrams, ADRs, integration guides, or internal tools for sales, quoting, or order management teams is welcome but not required.
  • Connectivity, SD-WAN, SASE, or network platform domain background is useful but not required.

Benefits

Comp & perks
  • Part of a team that is engaged and owning the things they do, highly trustable with direct commercial stakes.
  • Direct access to production systems, real data, and decision-makers — no layers of process between your work and its impact.
  • Exposure to cutting-edge technologies and large-scale global networks.
  • A role designed with trajectory in mind — the knowledge you build here is directly applicable to a senior technical execution path.
  • Competitive compensation and local benefits
  • Hybrid Working
  • Equal Opportunities employer supporting and celebrating every employee regardless of background, religion, nationality, sexual orientation, age, or physical condition.