Senior Back-end Developer
Offer summary

(Summary generated by AI based on the full job description)

The project concerns IT services and building scalable backend solutions. Work involves development and optimization using Java 21, Spring Boot 4.x, REST API, cloud (AWS) and infrastructure automation (CloudFormation/CDK). Complementary stack includes Kafka, Docker, Jenkins, Maven and Git. Responsibilities include designing and developing backend components, ensuring security and testability, code optimization, supporting deployments and documentation, and sharing best practices within Agile. Rate: 85–120 PLN net/h (B2B).

newyou can start ASAP

Senior Back-end Developer

Company: Cyclad

from: 21 October 2026
to: 20 November 2026
85 - 120 złnet (+ VAT)/ hr.B2B contract (full-time)
Offer parameters
level:senior
working mode:hybrid
location:Warszawa, Masovian
Warszawa, Masovian

Requirements

Expected technologies

Java
Spring Boot
AWS
Cloudflare
SQL
Oracle
Kafka
Docker
Jenkins
Maven
Git

Optional technologies

Redis
OpenShift
Angular
Jira
Confluence
IntelliJ
Visual Studio Code

Our requirements

  • Strong hands-on experience in backend development, with at least 5 years of relevant experience
  • Expert knowledge of Java 21 and Spring Boot 4.x
  • Expert knowledge of HTTP and REST APIs
  • Experience with AWS or other cloud platforms
  • Knowledge of Infrastructure as Code, particularly CloudFormation or CDK
  • Experience with SQL and Oracle
  • Knowledge of Kafka or other streaming technologies
  • Experience with Docker, Jenkins, Maven, and Git
  • Knowledge of OWASP security standards
  • Strong understanding of Agile methodologies, including Scrum and Kanban, as well as DevOps practices
  • Fluent professional English
  • Strong analytical and problem-solving skills
  • Ability to work independently while collaborating effectively within an Agile team
  • Willingness to work in a hybrid model, with 3 days per week in the Warsaw office

Optional

  • Experience with Redis
  • Knowledge of OpenSearch
  • Experience with Angular 20+
  • Familiarity with Jira and Confluence
  • Experience with IntelliJ IDEA or Visual Studio Code

Your responsibilities

  • Design and develop high-quality backend components and scalable solutions
  • Build secure, maintainable, and testable applications
  • Collaborate with business and technical stakeholders to understand and refine requirements
  • Assess technical feasibility and propose appropriate solutions
  • Optimize existing code to improve performance and maintainability
  • Support testing, deployment, and technical documentation
  • Share technical best practices and support less experienced developers
  • Contribute to continuous improvement within an Agile development environment

About the project

At Cyclad, we work with top international IT companies to help them deliver cutting-edge technologies and innovative digital solutions. We are currently looking for an experienced Senior Back-end Developer to join a team responsible for designing, developing, and maintaining scalable, secure, and high-quality backend solutions.
The project focuses on backend development, code optimization, and building maintainable and reliable applications. In this role, you will work with Java 21, Spring Boot 4.x, REST APIs, cloud technologies, and infrastructure automation, contributing to technical improvements while collaborating with business and technical stakeholders.
Project information:
Type of project: IT services
Office location: Warsaw, Poland
Work model: Hybrid (3 days in the office and 2 days remotely)
Budget: 85–120 PLN net/hour – B2B
Experience: 6+ years
Project length: Long-term
Start date: ASAP (depending on the candidate's availability)
Only candidates with citizenship in the European Union and résidence in Poland

This is how we organize our work

This is how we work

you focus on a single project at a timeyou have influence on the technological solutions appliedyou focus on product developmentagilescrumkanban

Team members

backend developertechnical leaderarchitectdevOps

This is how we work on a project

  • code review
  • Continuous Deployment
  • Continuous Integration
  • DevOps
  • documentation
  • integration tests
  • test automation
  • testing environments
  • unit tests
  • manual tests
Company

What we offer

  • Full-time cooperation agreement based on B2B
  • Private medical care with dental care (covering 70% of costs)
  • Multisport card (also for an accompanying person)
  • Life insurance
  • Opportunity to work in an international IT environment

Development opportunities we offer

  • intracompany training
  • mentoring
  • substantive support from technological leaders
  • technical knowledge exchange within the company

Benefits

  • sharing the costs of sports activities
  • private medical care
  • life insurance
  • remote work opportunities
  • flexible working time
  • integration events
  • dental care
  • no dress code

Recruitment stages

  • 1.
    Introductory HR call
  • 2.
    Technical interview
  • 3.
    Final decision

Cyclad

In Cyclad we work with top international IT companies in order to boost their potential in delivering outstanding, cutting edge technologies that shape the world of the future.

This is how we work

Senior Back-end Developer
85–120 zł / hr. (B2B)
I apply to:
Cyclad
Warszawa, Masovian
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