Senior Software Engineer - Java FullStack

Job Requirements

At Quest Global, it’s not just what we do but how and why we do it that makes us different. With over 25 years as an engineering services provider, we believe in the power of doing things differently to make the impossible possible. Our people are driven by the desire to make the world a better place—to make a positive difference that contributes to a brighter future. We bring together technologies and industries, alongside the contributions of diverse individuals who are empowered by an intentional workplace culture, to solve problems better and faster.

Key Responsibilities

• Design and implement RESTful APIs & microservices using Java / Spring Boot on the RakuRaku framework

• Build and optimize relational database schemas (PostgreSQL / MySQL) for MES data models
• Integrate MES with ERP, SCADA, PLCs, and IoT sensors via OPC-UA and MQTT protocols
• Develop React / Angular dashboards for real-time production KPIs, OEE metrics, and work orders
• Implement WIP tracking, production scheduling, quality management, and traceability modules
• Write unit & integration tests (JUnit, Mockito); maintain CI/CD pipelines (Jenkins / GitHub Actions)
• Containerize services with Docker and support Kubernetes deployments
• Mentor junior engineers, conduct code reviews, and uphold engineering standards

We are known for our extraordinary people who make the impossible possible every day. Questians are driven by hunger, humility, and aspiration. We believe that our company culture is the key to our ability to make a true difference in every industry we reach. Our teams regularly invest time and dedicated effort into internal culture work, ensuring that all voices are heard.

We wholeheartedly believe in the diversity of thought that comes with fostering a culture rooted in respect, where everyone belongs, is valued, and feels inspired to share their ideas. We know embracing our unique differences makes us better, and that solving the worlds hardest engineering problems requires diverse ideas, perspectives, and backgrounds. We shine the brightest when we tap into the many dimensions that thrive across over 21,000 difference-makers in our workplace.

Work Experience

• 5+ years of professional development experience; 2+ years in Java fullstack projects
• Java 11+, Spring Boot, Spring MVC, Spring Security, Spring Data
• RakuRaku framework proficiency, or a strong track record of adopting enterprise Java frameworks quickly
• Frontend skills: React or Angular, state management (Redux / NgRx), REST / GraphQL
• SQL expertise — query optimization, indexing, and transaction management
• Message brokers: Kafka, RabbitMQ, or ActiveMQ for event-driven architecture
• Docker, Kubernetes, Git, and Agile / Scrum methodologies

Nice to Have

• MES platform experience (Siemens Opcenter, Tulip, Rockwell Plex, or custom solutions)
• Familiarity with ISA-95 / ISA-88 manufacturing standards
• Time-series databases (InfluxDB, TimescaleDB) and OPC-UA / MQTT hands-on experience
• AWS, Azure, or GCP cloud deployment; Oracle Certified Professional (Java)