Backend Developer

Description
We are partnering with one of the largest banking and financial services organisations in seeking a highly skilled Backend Engineer to join one of our cross-functional product teams responsible for building and scaling next-generation Banking-as-a-Service (BaaS) capabilities. The successful candidate will help design, develop, and maintain secure, cloud-native backend systems that power customer-facing financial products and services.
This is a 12-month contract with a strong likelihood of extension, offering a predominantly remote working model with just 2 days onsite per month in Warsaw, Poland.
Key Responsibilities
Software Engineering
Design, develop, test, and maintain high-quality backend services and APIs.
Produce clean, maintainable, reusable, and well-documented code.
Build highly available, resilient, and scalable microservices.
Develop event-driven solutions using modern messaging technologies.
Participate in architecture discussions and contribute to technical decision-making.
Cloud & Infrastructure
Develop and deploy applications within AWS cloud environments.
Support containerised workloads using Kubernetes and Docker.
Contribute to infrastructure automation and DevOps best practices.
Ensure observability, monitoring, and operational excellence across services.
Collaboration & Delivery
Work closely with Product Managers, Engineers, QA Engineers, Designers, and Business Stakeholders.
Participate in Agile ceremonies including stand-ups, sprint planning, retrospectives, and technical refinement sessions.
Translate business requirements into scalable technical solutions.
Contribute to continuous improvement initiatives across engineering teams.
Technical Leadership
Act as a subject matter expert within the engineering team.
Mentor junior developers and support knowledge sharing.
Promote engineering standards, code review best practices, and software craftsmanship.
Drive innovation and continuous improvement within the backend engineering chapter.
Required Skills & Experience
Strong commercial Experience with Java development.
Deep knowledge of Spring Boot and/or Micronaut frameworks.
Experience designing and developing RESTful APIs and microservices.
Strong understanding of software design patterns and distributed systems.
Experience with AWS services and cloud-native architectures.
Hands-on Experience with Kubernetes and Docker.
Knowledge of messaging technologies such as Kafka and event-driven systems.
Experience working in Agile delivery environments.
Strong troubleshooting and problem-solving capabilities.
Desirable
Financial services, fintech, or regulated industry Experience.
Experience building highly secure applications.
CI/CD pipeline development and automation expertise.
Experience with observability tooling, monitoring, and logging platforms.
Understanding of data-driven product development and analytics
Skills
Java
Spring Boot
AWS
Kubernetes/Docker
Kafka
Job Title: Backend Developer
Location: Warsaw, Poland
Job Type: Contract
Trading as TEKsystems. Allegis Group Limited. Level 1, The Chase, Carmanhall Road, Sandyford, Dublin 18, Ireland. No. 909257. TEKsystems is a company within the Allegis Group network of companies (collectively referred to as "Allegis Group"). Aerotek, Aston Carter, EASi, Talentis Solutions, TEKsystems, Stamford Consultants and The Stamford Group are Allegis Group brands. If you apply, your personal data will be processed as described in the Allegis Group Online Privacy Notice available at https://www.allegisgroup.com/en-gb/privacy-notices.
To access our Online Privacy Notice, which explains what information we may collect, use, share, and store about you, and describes your rights and choices about this, please go to https://www.allegisgroup.com/en-gb/privacy-notices.
We are part of a global network of companies and as a result, the personal data you provide will be shared within Allegis Group and transferred and processed outside the UK, Switzerland and European Economic Area subject to the protections described in the Allegis Group Online Privacy Notice. We store personal data in the UK, EEA, Switzerland and the USA. If you would like to exercise your privacy rights, please visit the "Contacting Us" section of our Online Privacy Notice at https://www.allegisgroup.com/en-gb/privacy-notices for details on how to contact us. To protect your privacy and security, we may take steps to verify your identity, such as a password and user ID if there is an account associated with your request, or identifying information such as your address or date of birth, before proceeding with your request. If you are resident in the UK, EEA or Switzerland, we will process any access request you make in accordance with our commitments under the UK Data Protection Act, EU-U.S. Privacy Shield or the Swiss-U.S. Privacy Shield.

Work arrangement
Yes