Senior Full-Stack Developer (.NET+React)

Eleks; Poland; On-site; PLN 180,000 - 300,000; Full time

Job summary

ELEKS is a custom software development company delivering value to clients since 1991. We are rebuilding and modernizing digital tools, creating a scalable platform used across international markets as part of a broader modernization effort.

You will join a team focused on reusable components and simplified, intuitive modules within a unified ecosystem. We seek a senior software engineer with 7+ years of .NET Core and C# experience, strong API design, cloud exposure, and English proficiency.

Qualifications

• At least 7+ years of software development experience using .NET Core and C#.
• Experience designing, developing, and integrating REST APIs and working with third-party services.
• Solid knowledge of SQL and experience with data processing and database-driven apps.
• Hands-on experience with Microsoft Azure and cloud-based services.
• Familiarity with Git, CI/CD pipelines, and Azure DevOps.
• Experience with Playwright or similar tools for automated end-to-end testing.
• Ability to write clean, maintainable, and well-tested code.
• Good understanding of software development best practices and modern engineering principles.
• Excellent written and verbal communication skills, including the ability to present architectural decisions to stakeholders.
• Upper-Intermediate or higher level of English.

Responsibilities

• Design, develop, and maintain reliable software in line with technical requirements.
• Analyze requirements, and independently estimate and set up tasks’ acceptance criteria.
• Evaluate and coordinate tasks’ deadlines with the Technical Leader or Project Manager.
• Apply the best software development practices and coding standards to produce high-quality and performant solutions.
• Stay up-to-date with modern technology and optionally obtain professional certifications.
• Participate as a trainer or a trainee in various learning programs outside the main project.

Skills

NET Core

C#

REST APIs

Azure

SQL

Git

CI/CD

Playwright

Testing

English

Tools

Playwright

Azure DevOps

Git

CI/CD pipelines

Job description

Our customer is a global British-American company in the professional services and consulting domain, providing solutions that help clients manage risk and grow their business portfolios. We’re rebuilding and modernizing the digital tools they offer to their customers. ELEKS has been engaged to develop a new software platform that will accelerate product development by introducing reusable components, modernize existing tools into simpler, more intuitive modules, and unify tools and data into a single, efficient ecosystem. You’ll help build a modern, scalable platform used across international markets.

REQUIREMENTS

• At least 7+ years of software development experience using .NET Core and C#
• Experience designing, developing, and integrating REST APIs and working with third-party services
• Solid knowledge of SQL and experience working with business data processing and database-driven applications
• Hands-on experience with Microsoft Azure and cloud-based services
• Familiarity with Git, CI/CD pipelines, and Azure DevOps
• Experience with Playwright or similar tools for automated end-to-end testing
• Ability to write clean, maintainable, and well-tested code
• Good understanding of software development best practices and modern engineering principles
• Excellent written and verbal communication skills, including the ability to present architectural decisions to both technical and non-technical stakeholders
• Upper-Intermediate or higher level of English

RESPONSIBILITIES

• Design, develop, and maintain reliable software in line with technical requirements
• Analyze requirements, and independently estimate and set up tasks’ acceptance criteria
• Evaluate and coordinate tasks’ deadlines with the Technical Leader or Project Manager
• Apply the best software development practices and coding standards to produce high-quality and performant solutions
• Stay up-to-date with modern technology and optionally obtain professional certifications
• Participate as a trainer or a trainee in various learning programs outside the main project

WHAT YOU WILL GET WITH ELEKS

• Close cooperation with a customer
• Challenging tasks
• Ability to influence project technologies
• Team of professionals
• Dynamic environment with low level of bureaucracy

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.