Principal Java Developer

Mobile Wave Solutions is a professional services company specializing in software development as a service. We partner with global organizations to build scalable, high-quality platforms and modern digital systems. With a growing team of 120+ engineers, we empower businesses to innovate through strong engineering culture, modern technologies, and delivery excellence.

Role Overview

We are looking for a Senior Java Developer to join our Platform Team and take ownership of modernizing a complex ecosystem. This is a hands-on, architecture-minded role focused on transforming legacy systems into modular, scalable microservices.

You will be deeply involved in rewriting core components, designing new system patterns, and setting engineering standards. Senior-level autonomy, strong system thinking, and a passion for clean architecture are essential.

Key Responsibilities

• Drive architectural decisions and own large components of the platform.

• Lead modernization efforts: monolith decomposition, refactoring, API redesign.

• Build robust, scalable microservices using Spring Boot (Java/Kotlin) is a must.

• Define engineering standards, coding practices, and platform-wide conventions.

• Review, refactor, and improve both human-written and AI-generated code.

• Ensure maintainability, performance, testability, and scalability of all services.

• Advocate for clean API design, BFF layers, and modular architecture.

• Collaborate with cross-functional teams to design end-to-end solutions.

• Mentor mid-level engineers and guide AI agents to produce reliable code.

• Contribute to CI/CD workflows, automation, and cloud deployments (AWS).

Qualifications

• 7+ years of professional Java/Kotlin experience.

• Expertise with Spring Boot and comfort with older Spring MVC systems.

• Strong experience designing and building microservices architectures.

• Knowledge of event-driven systems (Kafka or similar).

• Deep understanding of REST APIs, integration layers, and API gateways.

• Strong database knowledge: PostgreSQL / MySQL / Aurora.

• Proficient in unit, integration, and contract testing.

• Experience with AWS (Fargate, EKS, Lambda).

• Solid CI/CD experience, ideally GitHub workflows.

• Ability to mentor others and collaborate in a modern engineering ecosystem.
  

Cultural Fit

• Autonomous and confident owning complex architecture.

• Thrives in modernisation and large-scale system transformation.

• Comfortable navigating ambiguity and defining standards from scratch.

• Able to identify when AI-generated code needs rewriting or rearchitecting.
  

Our Benefits

• Remote / Hybrid work options

• Private Health Insurance, including dental

• Free Parking

• Fun Office Space – game zone + relaxation area

• Annual Holidays Boost – +5 extra days after year 1 and year 5

• Company-sponsored training & certifications

• Employee referral bonuses

• Social & team events

• Family insurance coverage options

• Fully covered Multisport Card