Senior Java Developer (Spring Boot/Shopify) - Portugal Full Remote

Senior Java Developer (Spring Boot/Shopify) - Portugal Full Remote ABOUT THE OPPORTUNITY Join a global software engineering company known for its people-first, politics-free culture, built on lean principles and self-organising teams. As a Senior Java Developer, you'll own solutions end to end, from design to deployment and production support. You'll mentor fellow engineers and help shape the technical direction of large-scale digital commerce platforms. AI-assisted development is encouraged, and engineering craft is what's valued most. PROJECT & CONTEXT You'll work on complex, production-level e-commerce systems built around Shopify integrations and event-driven backend services. Your responsibilities will include: Designing and implementing scalable backend services and APIs Owning your code through development, deployment and maintenance Diagnosing and resolving production issues Challenging business requirements to deliver the best outcomes Driving adoption of new technologies and contributing to the technology roadmap Mentoring the team and conducting technical interviews Working hours are 08:00–17:00 CET. Occasional national or international travel may be required (0–15%, depending on project needs). WHAT WE'RE LOOKING FOR (Required) Solid experience as a Senior Java Developer (Java 17+/21) on complex, production-grade backend systems Proven hands-on experience running, maintaining and troubleshooting Shopify integrations in production Strong experience with Spring Boot 3.x, building and maintaining scalable services and APIs Solid experience designing, developing and maintaining GraphQL APIs Strong hands-on experience with AWS Fluent English (written and spoken) Must be based in Portugal AWS DynamoDB and AWS secrets management solutions (e.g., Secrets Manager) Apache Kafka or similar event-streaming technologies in asynchronous, event-driven architectures OpenTelemetry and observability practices (monitoring and distributed tracing) Experience mentoring engineers and taking part in technical hiring Compensation: €2,550 – €3,350/month net, depending on experience and seniority level. Why HumanIT people stay (4.4 Glassdoor, 89% recommend) 15th month salary Health insurance covering your family Birthday off Mobility program for digital nomads Real work-life balance Full benefits: What it's really like: Originally posted on Himalayas