• Further development of our highly successful 3D/BIM CAD system STRAKON • Development of new features within a complex software environment • Maintenance of the existing codebase

• Diseñar, implementar y escalar diversas soluciones, enfocándote en escribir código pulido y fácil de entender. • Utilizarás Ruby como lenguaje de desarrollo o lenguajes OO en el server side. • Seguirás las mejores prácticas, participarás en code reviews y contribuirás a la arquitectura compartiendo e implementando tus mejores ideas. • Trabajarás estrechamente con especialistas (QA, Product Owners) para asegurar la calidad del software. • Aplicarás las mejores prácticas de desarrollo seguro (como OWASP Top 10), asegurarás el manejo seguro de datos sensibles y colaborarás con los equipos de Security y DevOps para implementar controles automatizados en el CI/CD.

Role Description - Design, develop and maintain backend services and APIs using Java - Build scalable, secure and high-performance backend architectures - Integrate internal and external systems via RESTful APIs and messaging services - Collaborate closely with Frontend, Product Management, DevOps and Architecture teams - Write clean, testable and maintainable code following best practices - Participate in code reviews, technical discussions and architectural planning - Work in an agile environment (Scrum/Kanban) Qualifications - Several years of hands-on experience as Backend Developer / Java Developer - Strong expertise in Java (Java 11+), incl. Spring or Spring Boot - Solid knowledge in: - REST APIs / microservices - Relational and/or NoSQL databases (e.g., PostgreSQL, MySQL, MongoDB) - Build & dependency management tools (Maven, Gradle) - Version control (Git) - Experience with: - CI/CD pipelines (e.g., GitLab CI, Jenkins) - Cloud environments (AWS, Azure, or similar) — a plus - Container technologies (Docker, Kubernetes) — nice to have - Strong problem-solving skills, structured way of working, ownership mindset - Good English skills for international collaboration Requirements - Location: Hungary, (remote and occasional travel to Budapest or Budaörs) - Workload: Full-time - Language: English (Hungarian a plus) - Start: ASAP - Duration: B2B, 6 months (option of extension) - The candidate has to reside in Hungary

Role Description As a Software Development Engineer III at Palmetto, you will play a key role in designing, building, and scaling critical data ingestion pipelines and 3rd party integrations that connect hundreds of thousands of solar energy and HVAC systems to our platform. Your work will directly impact product teams, analytics, customer support, operations, and business intelligence systems that depend on reliable, mission-critical data. - Design and implement scalable server-side solutions, with an emphasis on APIs, backend services, event-driven architecture, and database integration. - Write high-quality, testable, and maintainable code across the full stack. - Develop and maintain comprehensive unit, integration, and end-to-end tests. - Diagnose and troubleshoot production issues and propose robust solutions. - Participate in Agile ceremonies (planning, grooming, retrospectives) and contribute to meaningful story estimations. - Engage in architectural discussions, technical design reviews, and contribute to Palmetto's engineering standards. - Identify and advocate for opportunities to improve system performance, reliability, and developer productivity. - Partner cross-functionally with product managers, designers, and QA to deliver well-rounded user-centric solutions. Qualifications - 5+ years of professional software engineering experience. - Strong proficiency in JavaScript (ES6+) and understanding of the JavaScript object model. - Proficiency with NestJS and experience designing/consuming RESTful APIs. - Experience building and maintaining backend applications in an event-driven architecture. - Experience with message queues and message brokers. - Hands-on experience working with NoSQL/document-based databases (e.g., MongoDB). - Expertise in solving complex problems related to data consistency and ingestion at enterprise scale. - Strong unit and integration testing discipline; TDD experience is a plus. - Familiarity with CI/CD pipelines, code versioning (Git), and modern development workflows. - Excellent written and verbal communication skills. - Strong problem-solving skills, a continuous learner mentality, and a commitment to team success. Requirements - Experience with NestJS or other Node.js frameworks beyond Express. - Familiarity with server-side rendering concepts and isomorphic React applications. - Knowledge of authentication and authorization patterns (e.g., OAuth, JWT). - Experience with front-end build tools (Webpack, Vite, Babel, etc.). - Exposure to containerization (Docker) and cloud platforms (AWS, GCP, Azure). - Practical knowledge of Agile methodologies, pair programming, and code review practices. - Enthusiasm for building clean, scalable, and maintainable code. Benefits - Comprehensive benefits package including unlimited PTO, medical, dental, and vision coverage. - Paid parental leave. - Retirement plans. - Opportunities for career growth and talent development. Company Description Palmetto is a leading clean tech company on a mission to accelerate the transition to a clean energy future. Our award-winning technology platform empowers homeowners, businesses, and entrepreneurs to adopt renewable energy through simple, scalable, and innovative solutions. Palmetto prioritizes people, planet, and profit—backed by a culture that values collaboration, impact, and balance. Join us in building a brighter, cleaner world.