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