Senior Java Engineer — AWS, Microservices & DevOps

UST; Madrid; Hybrid; EUR 65,000 - 90,000; Full time

Benefits offered by this job

Health benefits

Flexible work policy

Remote work option

Training platforms

Career progression

Job summary

UST is seeking a Senior Java Engineer (AWS) to join a global project with a leading financial services client. You will design, build, and maintain high-quality software, taking ownership of the deployment and operation in a DevOps context.

You will work across the SDLC, collaborate with cross-functional teams, and help shape scalable, secure systems. The ideal candidate has deep Java expertise, hands-on AWS experience, and a strong grasp of REST, microservices, and testing strategies.

Qualifications

• Very strong Java programming skills and knowledge of building APIs.
• Deep understanding of all stages in the Software Development Life Cycle.
• Deep understanding of design patterns and principles (e.g. SOLID).
• Experience with different testing types: Unit Testing, API Testing, Acceptance Testing, Load Testing.
• Experience with distributed architectures like SOA or MSA.
• Experience with event-driven architectures: messaging, queues like RabbitMQ/Kafka.
• Experience with REST APIs and AWS services (desirable).
• Experience with Gradle or Maven and Enterprise Jenkins.
• Experience working in an Agile fashion (Scrum/SAFe).

Responsibilities

• Design, build, and maintain efficient, reusable software.
• Own and operate delivered software within the DevOps model.
• Ensure best performance, quality, and responsiveness of applications.
• Work independently and in teams.
• Participate in full SDLC and peer reviews.
• Align with Product Management goals and vision.
• Innovate within the team and technical domain.

Skills

Java

API Design

SDLC

SOA/MSA

Event-driven

REST APIs

Jenkins

Testing

TDD/BDD

Tools

AWS

AWS Lambda

Docker

Gradle/Maven

Serverless

Kafka

RabbitMQ

Job description

UST is seeking a Senior Java Engineer (AWS) to join a global project with a leading financial services client. You will design, build, and maintain high-quality software, taking ownership of the deployment and operation in a DevOps context.

You will work across the SDLC, collaborate with cross-functional teams, and help shape scalable, secure systems. The ideal candidate has deep Java expertise, hands-on AWS experience, and a strong grasp of REST, microservices, and testing strategies.