Senior Full-Stack Engineer – Java/Azure

Adecco; Wrocław; On-site; PLN 240,000 - 420,000; Full time

Benefits offered by this job

Contract: B2B

Duration till 31 Aug 2027

Job summary

Adecco is recruiting a Senior Full-Stack Engineer for a financial services organisation modernising a business-critical investment accounting platform. The role focuses on Java backend and platform engineering, building scalable services for real-time and batch data processing with enterprise data platforms, and mentoring engineers.

You will design and operate multi-tenant services, move legacy functions to cloud-ready API-first systems, and collaborate with product, operations, architecture and

Qualifications

• 7+ years building large-scale distributed software systems.
• Strong hands-on Java and backend API development.
• Production-grade service design, testing, deployment and support.
• SQL and/or NoSQL database experience.
• Cloud or hybrid-platform experience.
• CI/CD, DevOps practices and automated testing.
• Strong technical communication and mentoring skills.
• Computer Science degree or equivalent practical experience.

Responsibilities

• Design, build, test and operate scalable Java and API-driven services.
• Develop multi-tenant capabilities for real-time and batch data ingestion.
• Modernise legacy functions into cloud-ready, API-first services.
• Work with SQL and/or NoSQL databases and enterprise data platforms.
• Improve reliability, observability, auditability and operational controls.
• Lead design discussions and support architecture decisions.
• Conduct code reviews and mentor other engineers.
• Take ownership from implementation through deployment and production support.
• Collaborate with product, operations, architecture and distributed engineering teams.

Skills

Java backend

Distributed systems

API development

Mentoring

Cloud/hybrid platforms

Education

Computer Science degree

Tools

SQL/NoSQL

Cloud services

CI/CD

Java ecosystem tooling

Job description

Adecco is recruiting a Senior Full-Stack Engineer for a financial services organisation modernising a business-critical investment accounting platform.

The position focuses primarily on Java backend and platform engineering. You will build scalable services supporting high-volume accounting workflows, real-time and batch data processing, and integration with enterprise data platforms. You will also contribute to architecture decisions, mentor engineers and take ownership of services in production.

Responsibilities

• Design, build, test and operate scalable Java and API-driven services.


• Develop multi-tenant capabilities for real-time and batch data ingestion.


• Modernise legacy functions into cloud-ready, API-first services.


• Work with SQL and/or NoSQL databases and enterprise data platforms.


• Improve reliability, observability, auditability and operational controls.


• Lead design discussions and support architecture decisions.


• Conduct code reviews and mentor other engineers.


• Take ownership from implementation through deployment and production support.


• Collaborate with product, operations, architecture and distributed engineering teams.

Required experience

• 7+ years building large-scale distributed software systems.


• Strong hands-on Java and backend API development.


• Experience with production-grade service design, testing, deployment and support.


• SQL and/or NoSQL database experience.


• Cloud or hybrid-platform experience.


• CI/CD, DevOps practices and automated testing.


• Strong technical communication and mentoring skills.


• Computer Science degree or equivalent practical experience.

Preferred experience

• Microsoft Azure and on-premises platforms.


• Financial services, investment accounting or transaction-processing systems.


• Oracle, Snowflake, Python, TypeScript, Angular, Kafka or Spark.


• Legacy platform modernisation.

Contract: B2B

Duration: until 31 August 2027

The selection process takes place via Microsoft Teams and includes a 45-minute coding exercise and a 45-minute interview.