Mid-Level Java Backend Developer

Expleo Group; Lisboa; Hybrid; EUR 40,000 - 55,000; Full time

Job summary

Expleo collaborates globally to drive innovation through engineering, technology and consulting services. The team seeks a backend developer with 3–4+ years of experience specializing in Java, microservices, REST APIs, and GraphQL, with strong knowledge of authentication flows and event-driven/messaging systems.

Proficiency in AWS SQS and fluent English are preferred to collaborate effectively across pan-European centers and client projects.

Qualifications

• 3–4+ years experience as Backend/Java developer or similar role.
• Strong proficiency in Java, microservices, REST APIs, and GraphQL.
• Solid knowledge of authentication and authorization flows.
• Experience with event-driven development and messaging systems.
• Experience with AWS Cloud (SQS).
• Good communication skills in English and detail-oriented.

Skills

Java

Backend development

REST APIs

GraphQL

Authentication flows

Event-driven development

Messaging systems

AWS SQS

English communication

Tools

AWS SQS

Job description

Expleo is a trusted partner for your innovation journey. As a global engineering, technology and consulting service provider, we are ideally positioned to help you achieve your ambitions and future-proof your business. With a smart blend of bold thinking and reliable execution, we’re able to fast-track innovation through each step of your value chain.

We are strategically positioned to build value, with global footprint across 30 countries.

We are as global and local as you need us to be, with strong best-in-class pan-European technological centres and unique best-shoring capabilities.

We leverage a network of high value-adding affiliates in consulting and industrial excellence, and leading partners across multiple sectors to provide you with the most comprehensive services and solutions in an ever-changing environment.

Essential Skills

• Professional experience (3–4+ years) as a Backend Developer, Java Developer, or in similar roles;


• Strong proficiency in Java, microservices, REST APIs, and GraphQL;


• Solid knowledge of authentication and authorization flows;


• Professional experience with event-driven development as well as messaging systems;


• Professional experience with AWS Cloud (SQS);


• Good communication skills in English, with the ability to collaborate, solve problems, and pay attention to detail.