JAVA Developer with Quarkus

Summary: JAVA Developer with Quarkus is sought for a 3-month remote position to assist an international client in migrating APIs from Mulesoft to JAVA as part of a legacy system transition to microservices. The role requires extensive experience in JAVA development, particularly with Quarkus and Apache Kafka. The candidate will be responsible for low-level design, technical development, and building REST APIs. Immediate start is required, with a workload of five days per week.

Key Responsibilities:

• Low level design
• Development and migration of APIs from Mulesoft to JAVA
• Technical development based on requirements
• Building and consuming REST APIs, MicroProfile REST Client or similar
• Implementing HTTP client patterns, error handling, retry strategies

Key Skills:

• More than 5 years of experience in JAVA Development
• Project experience with Core Java version 17 upwards, preferably experience with JAVA 25
• Strong project experience with Quarkus 3.x
• Strong project experience with Apache Kafka
• Minimum of 2 years of project experience with event-driven / message-driven architectures
• Experience in migrating legacy systems (ESB, monolith) to microservices - preferred
• Experience with SQL / Relational Databases - preferably PostgreSQL
• Experience with building and consuming REST APIs, MicroProfile REST Client
• Experience in the manufacturing industry - preferred
• Fluency in English

Salary (Rate): undetermined

City: undetermined

Country: Poland

Working Arrangements: remote

IR35 Status: undetermined

Seniority Level: undetermined

Industry: IT

Detailed Description From Employer:

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JAVA Developer with Quarkus - 3+ months - Remote - Start ASAP

For our international client, we are looking for an experienced JAVA Developer/Engineer with experience in Quarkus.

Your main task is to support the client in the migration of APIs from Mulesoft to JAVA as part of a migration of legacy systems (ESB, monolith) to microservices.

Tasks:

* Low level design

* Development and migration of APIs from Mulesoft to JAVA

* Technical development based on requirements

* Building and consuming REST APIs, MicroProfile REST Client or similar

* HTTP client patterns, error handling, retry strategies

Requirements:

* More than 5 years of experience in JAVA Development

* Project experience with Core Java version 17 upwards, preferably experience with JAVA 25

* Strong project experience with Quarkus 3.x

* Strong project experience with Apache Kafka

* Minimum of 2 years of project experience with event-driven / message-driven architectures

* Experience in migrating legacy systems (ESB, monolith) to microservices - preferred

* Experience with SQL / Relational Databases - preferably PostgreSQL

* Experience with building and consuming REST APIs, MicroProfile REST Client

* Experience in the manufacturing industry - preferred

* Fluency in English

Project details:

* Start: ASAP

* Duration: 3 months (+ option to extend)

* Workload: 5 days per week

* Location: 100% remote (European based only)

* Languages: Fluency in English

Telephone interview slots with our client can be arranged at short notice with a decision immediately thereafter.

Reference
CR/132601_1771250750

Date
16 Feb 2026

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