Java Developer

Spin.AI is a global SaaS cybersecurity company that protects mission-critical data across Google Workspace, Microsoft 365, Salesforce, Slack & more. Our product — SpinOne — is a platform that combines SSPM, ransomware protection, DLP, backup & recovery for enterprise customers worldwide. We are looking for a Backend Developer with strong Java and Spring Boot experience to join our engineering team. You will work on backend services for a complex cybersecurity SaaS product, including integrations, data processing, asynchronous workflows, access control, permissions, audit logs, backup and recovery flows. This role is based in our Lisbon office in a hybrid format. If you are not currently in Portugal, we are open to remote work during the trial period, with relocation to Lisbon afterward. 🛠 Tech Stack Java 19 Spring Boot MyBatis PostgreSQL RabbitMQ REST APIs Git / Bitbucket Jira / Confluence CI/CD pipelines 🧰 Responsibilities Develop and maintain backend services using Java and Spring Boot. Work with PostgreSQL: write SQL queries, analyze execution plans, optimize performance, and work with indexes. Use MyBatis for database interaction. Build and maintain integrations with internal and external APIs. Work with RabbitMQ and asynchronous backend workflows. Participate in technical discussions, code reviews, and feature planning. Collaborate with frontend, QA, DevOps, and Product teams. Debug issues, analyze logs, and improve backend performance and reliability. Write clean, maintainable, and well-structured code. 📌 Must-have Requirements 4+ years of commercial backend development experience. Strong experience with Java and Spring Boot. Experience with Java 19. Experience with MyBatis. Strong knowledge of PostgreSQL. Confident SQL skills. Experience analyzing and optimizing query execution plans. Understanding of indexes and database performance basics. Experience with RabbitMQ or similar message brokers. Experience with REST API development and integration. Ability to work with complex product logic and enterprise-level workflows. Good communication skills and ownership mindset. English: Intermediate+. Nice-to-have Experience with Elasticsearch. Experience with AWS S3, Google Cloud Storage, or Azure Blob Storage. Experience with Salesforce API. Experience with Microsoft Graph API. Experience with Google API. Experience with Slack API. Experience with cybersecurity, SaaS, or enterprise products. Experience with Claude AI or other AI tools for development productivity. 🌍 Why Spin.AI Work in a fast-moving, high-impact cybersecurity company recognized by Gartner, Forrester, and G2 . Work on a real product with real users and visible business impact Work on an interesting and large-scale product Solve complex, non-trivial security and engineering challenges Opportunity to influence technical and product decisions Trust from management and autonomy in day-to-day work Strong, professional team with deep expertise 🎁 What we offer Annual performance-based salary review Annual performance-based bonus Referral bonuses Educational budget Sport & hobby compensation Medical insurance compensation Company presents (birthdays, anniversaries, weddings, etc.) Corporate travel parties twice a year