Senior Backend Developer

Adecco Portugal; Warszawa; Híbrido; PLN 179.000 - 249.000; Jornada completa

Ventajas ofrecidas por este puesto de trabajo

B2B Contract

Temporary Employment Contract

Hybrid in Warsaw (3x/week)

Descripción de la vacante

A Senior Backend Developer role in Warsaw, Poland, is open with Adecco Portugal. You will design, build, and maintain backend services and RESTful APIs powering client portal applications, using Java or .NET and collaborating with frontend teams for smooth integration.

The position offers hybrid work in Warsaw (3 days in office) and competitive compensation including B2B or temporary contracts, with a clear path to scalable backend architectures in the banking domain.

Formación

• 8+ years backend development experience.
• Proficient in Java or .NET (Spring Boot / .NET Core).
• Experience building and consuming REST APIs.
• Experience with containerized apps and orchestration (Docker/Kubernetes/OpenShift).
• Relational SQL database experience and data modeling.

Responsabilidades

• 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 production issues and participate in on-call rotations as needed.
• Participate in Agile ceremonies, sprint planning, and technical design discussions.

Conocimientos

Java

.NET

REST APIs

SQL

CI/CD

Unit testing

Agile

Herramientas

Docker

Kubernetes

OpenShift

Spring Boot

.NET Core

Descripción del empleo

We are seeking a Senior 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 can we offer?

• Start as soon as possible
• B2B Contract or Temporary Employment Contract
• Work mode: Hybrid in Warsaw (3 times per week from office)
• Salary: Up to 190 PLN net+VAT/h (B2B) / Up to 22 350 PLN gross/month (Temp)
• Projectin the banking sector

Requirements:

• At least 8+ years of backend software development experience, with strong expertise in Java or .NET
• 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

Responsibilities:

• 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