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Offer summary
(Summary generated by AI based on the full job description)
The project focuses on developing client-facing portal applications in the banking domain. Work in a cloud-native and containerized environment. Core stack: Java / .NET with preference for Spring Boot / .NET Core, REST APIs, and Docker/Kubernetes/OpenShift orchestration. Responsibilities include building and maintaining backend services and APIs, designing data models and integrating with relational/NoSQL databases, collaborating with frontend teams on API contracts, deploying services in containers, enforcing secure coding, unit/integration testing and CI/CD integration, optimizing performance and reliability, troubleshooting production issues with on-call duties, and participating in Agile ceremonies. Required minimum 8 years backend experience plus SQL and CI/CD familiarity.
from: 7 October 2026
to: 6 November 2026
170 - 190 złnet (+ VAT)/ hr.B2B contract (full-time)
19 800 - 22 350 złgross/ mth.temporary staffing agreement
Salary details
basic salary
Offer parameters
level:senior • expert
working mode:hybrid
location:Warszawa, Masovian
Warszawa, Masovian
Requirements
Expected technologies
.NET
Java
.NET Core
Spring Boot
Optional technologies
Kafka
RabbitMQ
Our 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
Optional
- Experience with messaging/event-driven architectures (Kafka, MQ, etc.)
- Financial services, fund administration, or transfer agency domain experience
- Exposure to cloud-native development practices
Your 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
About the project
The project focuses on the development and enhancement of client-facing portal applications within the banking environment. The role involves building scalable backend services and APIs that power customer-facing platforms, working in a cloud-native and containerized environment, and collaborating closely with frontend teams to deliver secure, high-performance, and well-integrated solutions.
This is how we organize our work
This is how we work
at the client's site
Recruitment for
We're recruiting for a global company from banking sector.
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.
Adecco Poland Sp. z o.o.
The world's leading workforce solutions company, offering temporary staffing, permanent placement and outsourcing across all sectors.
Senior Backend Developer
170–190 zł / hr. (B2B), 19.8k–22.4k zł / mth.
I apply to:
Adecco Poland Sp. z o.o.
Warszawa, Masovian
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