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: https://www.humanit.pt/careers/#perks
What it's really like: https://www.humanit.pt/careers/#work-at