Middle Strong/Senior Full-Stack (.Net+React) Developer

On-siteSalary not specified
Poland · Ukraine

Job Description, Responsibilities & Requirements

Description language:

About the Position

ELEKS Software Engineering and Development Office is looking for a Middle Strong/Senior Full-Stack (.Net+React) Developer in Ukraine or Poland.


About the Project

The project, funded by the US Government, involves the development of a Human Resources System for various ministries in a Middle Eastern country. This initiative aims to improve the efficiency and effectiveness of human resource management across multiple departments.


Responsibilities

  • Design and implement backend services using ASP.NET Core Web API and MVC + Razor, applying SOLID principles, dependency injection, and layered architectures
  • Build reliable workflows with Temporal
  • Use Redis for caching, session storage, pub/sub, and distributed locks
  • Lead frontend architecture: React + TypeScript, Module Federation (host/remotes), RsPack bundling/optimization
  • Ensure CI/CD, containerization, Kubernetes deployment patterns, and observability (logging/tracing/metrics)
  • Drive testing practices (unit, integration, E2E), code reviews, and mentor team members
  • Troubleshoot production incidents: performance tuning (SQL and frontend), memory leaks, and scaling issues

Requirements

  • 5+ years of professional experience in software development using C# /.NET /.NET Core
  • Strong experience with ASP.NET Core Web API and ASP.NET Core MVC
  • Production experience with MS SQL Server
  • Experience with Dapper
  • Hands-on Keycloak (or equivalent) and solid knowledge of OAuth2/OIDC/JWT, cookie security, CORS, CSRF mitigation
  • Redis for caching and distributed coordination
  • Strong React + TypeScript experience (hooks, Suspense, patterns for large apps)
  • Unit & integration testing for.NET and frontend; E2E testing (Cypress/Playwright)
  • Logging, distributed tracing (OpenTelemetry), metrics and alerting
  • Upper-intermediate or higher level of English

Nice to Have

  • Temporal experience (or equivalent): designing idempotent activities, child workflows, error handling and retries
  • Deep experience with SQL Server high-availability and performance tooling
  • Monorepo tooling and package management (pnpm, Yarn Workspaces, Nx)
  • Accessibility, i18n, enterprise security/compliance familiarity
  • Prior experience designing governance for micro-frontends and runtime orchestration
  • Experience with Telerik Reporting

What You Will Get with ELEKS

  • Close cooperation with a customer
  • Challenging tasks
  • Competence development
  • Team of professionals
  • Dynamic environment with low level of bureaucracy

About ELEKS

ELEKS is a custom software development company. We deliver value to our clients, thanks to our expertise and experience gained from working as a software innovation partner since 1991.

Our 2000+ professionals located in the Delivery Centers across Eastern Europe and sales offices in Europe and North America, provide our clients with a full range of software engineering services. These include product development, QA, R&D, design, technology consulting, and dedicated teams.


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[email protected]

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Job Details

Company name:
Eleks
Location:
Poland · Ukraine
Employment Type:
Full-time
Work Mode:
On-site
Posted on TheJob:
May 1, 2026
Last checked:
Jul 4, 2026
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