We are seeking a Senior Software Engineer with more than 10 years of experience in designing and building Java applications with a proven track record of modernising legacy applications in regulated environments. In this role, you will drive cloud-based transformations, design microservices platforms, and mentor developers through complex technical transitions. Your expertise in cloud, DevOps, microservices, and API design will be critical in migrating customer data and ensuring high-performance, scalable, and compliant solutions. Experience in iGaming is a strong plus.

What will you be doing?
Technical Leadership & Modernisation

Lead the

modernisation of legacy applications , ensuring they meet regulatory standards while improving performance, scalability, and maintainability.

Design, develop, and deploy

cloud-native microservices

on AWS.

Architect

high-performance, large-scale applications in Java , optimising for efficiency, reliability, and security.

Leverage AI to accelrate the refactoring of services.

Cloud & DevOps Transformation

Drive

cloud migration strategies ,



including lifting, shifting, and refactoring applications for cloud compatibility.

Implement

DevOps best practices , such as CI/CD pipelines, infrastructure as code (IaC), and observability tools (e.g., Prometheus, Grafana, ELK).

Ensure seamless

customer data migration

between platforms, maintaining data integrity, security, and compliance.

Microservices & API Development

Design and implement

scalable microservices architectures in Java , leveraging RESTful APIs, with event-driven systems (e.g., Kafka, RabbitMQ).

Integrate

AI-driven solutions

to enhance application intelligence, automation, and user experiences.

Optimise

API performance

and ensure robust, secure, and well-documented interfaces.

Mentorship & Collaboration

Mentor junior and mid-level developers, fostering a

culture of code quality, innovation, and continuous learning .

Collaborate with

cross-functional t

📌 Senior Software Engineer (Madrid)
🏢 LCKY Group
📍 Madrid