Find a jobRecruiters

Senior Backend Developer (Java / .NET)

Exclusive opportunity

Onsite

Senior Backend Developer (Java / .NET)

Diverse Consulting Group

Senior Backend Developer (Java / .NET)

Skills

SQL QueriesDockerJava.NETSpring BootKafkaKubernetes

25 days ago

Share this opportunity

Share this opportunity to other talents of your network:
✓ Offer them a visibility boost with clients.
✓ Help your contacts find their next job.

Important information


Location:

Warsaw, Poland

Work mode:

Onsite

Published on:

24 September 2026

What they need


As a recruitment company, DCG understands that every business is powered by experienced professionals. Our management style and partnership approach enable us to meet your needs and provide continuous support. Due to our ongoing growth and the large number of recruitment projects we undertake for our partners, we are currently looking for:

Senior Backend Developer (Java / .NET)

Responsibilities:

  • Design, develop, and maintain backend services and RESTful APIs using Java or .NET
  • Build scalable, reliable, and high-performance backend solutions for client-facing applications
  • Design data models and integrate services with relational and NoSQL databases
  • Collaborate with front-end developers to define API contracts and ensure seamless system integration
  • Develop and deploy applications in containerized environments using Docker, Kubernetes, or OpenShift
  • Apply secure coding standards and software engineering best practices
  • Create and maintain unit and integration tests
  • Integrate applications with CI/CD pipelines and automated deployment processes
  • Monitor and optimize application performance, scalability, and reliability
  • Troubleshoot technical and production issues and support their resolution
  • Participate in technical design discussions, sprint planning, code reviews, and other Agile activities

Requirements:

  • 8+ years of professional backend software development experience
  • Strong commercial experience with Java or .NET
  • Hands-on experience with Spring Boot or .NET Core / modern .NET
  • Strong experience designing and developing REST APIs
  • Experience with Docker and container orchestration platforms such as Kubernetes or OpenShift
  • Good knowledge of SQL and relational databases, including data modelling and query optimization
  • Experience with automated testing, including unit and integration testing
  • Familiarity with CI/CD pipelines and modern software delivery practices
  • Strong understanding of object-oriented programming and software engineering principles
  • Ability to work effectively in cross-functional Agile development teams
  • Fluency in English (both written and spoken)

Nice to have:

  • Experience with event-driven or messaging architectures, e.g. Kafka or MQ
  • Experience with cloud-native application development
  • Knowledge of NoSQL databases
  • Experience within financial services, fund administration, or transfer agency environments

Offer:

  • Private medical care
  • Co-financing for the sports card
  • Constant support of dedicated consultant
  • Employee referral program

Other offers great for you!

These companies are also looking for great profiles

LittleBig Connection (part of Mantu)

Développeur Backend Kotlin

Freelance

Lyon, France

Onsite

Skills

MongoDBKotlinSpring BootKubernetesSpring WebFluxHelm

11 days ago

Quick apply

Nexoris

Développeur Backend .NET / C# Senior

595

Freelance

Paris, France

Onsite, Hybrid

Skills

- Clean Architecture et Clean Code. - Entity Framework (idéalement). - Kubernetes. - Azure DevOps et pipelines CI/CD. - Observabilité applicative avec Datadog. - Utilisation avancée d’outils et agents IA pour le développement logiciel. - Spec-Driven Development. - Tests automatisés et validation des développements générés par IA.

10 days ago

Quick apply

Sapiens Group

Développeur Backend Senior JavaScript / Node.js

400€-450€/jours

Freelance

Paris, France

Hybrid

Skills

NextNode

4 days ago

Quick apply

The best place to find your next move

© 2026. All Rights Reserved.

Talents

Find a job

Create a profile

Solutions and tools