Senior Backend Developer (Java/.NET) – Hybrid Warsaw

Experis; Warszawa; Hybrid; PLN 150,000 - 190,000; Full time

Benefits offered by this job

Medicover healthcare package

Multisport card

Group life insurance

Job summary

Experis is seeking an experienced Backend Developer (Java or .NET) in Warsaw on a hybrid schedule (in-office 3 days a week). The role focuses on building scalable backend services and REST APIs powering client-facing portal applications.

Responsibilities include designing robust data integrations, containerized deployments with Docker/Kubernetes/OpenShift, and implementing CI/CD pipelines with automated testing. 8+ years of backend experience and strong SQL skills are required.

Qualifications

• 8+ years of backend development experience.
• Strong expertise in Java or .NET.
• Hands‑on experience building and consuming REST APIs.
• Experience with Docker, Kubernetes, or OpenShift.
• Solid SQL and database knowledge.
• Experience with CI/CD pipelines and automated testing.

Responsibilities

• Develop and maintain backend services and REST APIs.
• Design and integrate solutions with relational and NoSQL databases.
• Collaborate with frontend teams for seamless integrations.
• Build and deploy applications in containerized environments.
• Implement secure coding practices, automated testing and CI/CD pipelines.
• Optimize performance, scalability and reliability.
• Troubleshoot production issues and support stability.
• Participate in Agile ceremonies and technical design discussions.

Skills

Java

Spring Boot

.NET Core

REST APIs

SQL

Docker

Kubernetes

OpenShift

CI/CD

Automated testing

Agile practices

Tools

Docker

Kubernetes

OpenShift

Job description

Experis is seeking an experienced Backend Developer (Java or .NET) in Warsaw on a hybrid schedule (in-office 3 days a week). The role focuses on building scalable backend services and REST APIs powering client-facing portal applications.

Responsibilities include designing robust data integrations, containerized deployments with Docker/Kubernetes/OpenShift, and implementing CI/CD pipelines with automated testing. 8+ years of backend experience and strong SQL skills are required.