Backend Developer

Randstad Polska Sp. z o.o.; Warszawa; On-site; PLN 120,000 - 160,000; Full time

Job summary

Randstad Polska Sp. z o.o. seeks a Backend Developer to design, build, and maintain robust backend services and APIs powering client portal applications. You will work with Java or .NET, design data models, and ensure scalable, secure software.

You will collaborate with front-end teams, deploy in Docker/Kubernetes/OpenShift environments, and contribute to CI/CD and testing practices in an Agile setting.

Qualifications

• Strong object-oriented development experience.
• Experience with containerized/cloud-native deployment.
• Experience building and consuming REST APIs.
• Familiarity with CI/CD pipelines and automated testing.

Responsibilities

• Develop and maintain backend services and RESTful APIs.
• Design data models and database integration.
• Collaborate with front-end teams to define API contracts.
• Build and deploy services in Docker/Kubernetes/OpenShift.
• Participate in Agile ceremonies and on-call rotations.

Skills

Java

.NET

REST APIs

Docker

Kubernetes

OpenShift

SQL

CI/CD

Testing

Tools

Spring Boot

.NET Core

Job description

We are seeking a Backend Developer to design, build, and maintain robust, scalable backend services and APIs powering Client facing Portal applications. The ideal candidate has strong object-oriented development skills, experience with containerized/cloud-native deployment, and the ability to collaborate closely with front-end teams to deliver well-integrated, performant solutions.

What will your tasks involve?

• Develop and maintain backend services and RESTful APIs using Java or .NET.
• Design data models and integrate with relational/NoSQL databases as required by portal functionality.
• Collaborate with front-end developers to define API contracts and ensure smooth integration.
• Build and deploy services within containerized environments (Docker/Kubernetes/OpenShift).
• Implement secure coding practices, unit/integration testing, and CI/CD pipeline integration.
• Optimize service performance, scalability, and reliability.
• Troubleshoot and resolve production issues, participating in on-call/support rotations as needed.
• Participate in Agile ceremonies, sprint planning, and technical design discussions.

What we expect from you?

• Strong Java or .NET development experience (Spring Boot / .NET Core preferred).
• Experience building and consuming REST APIs.
• Experience with containerized applications and orchestration (Docker/Kubernetes/OpenShift).
• Working SQL/database experience (relational data modeling, query optimization).
• Familiarity with CI/CD pipelines and automated testing practices.
• Nice-to-Have: experience with messaging/event-driven architectures (Kafka, MQ, etc.), financial services, fund administration, or transfer agency domain experience, exposure to cloud-native development practices.

What you can expect from us?

• Contract Stability
• High level of autonomy and independence
• Senior role: The chance to act as a Backend Developer
• Participation in key projects
• International collaboration: Building and cultivating partnerships across various business regions

досвід

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