Job Description

Summary

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We are seeking a skilled Back-End Developer to build high-performance microservices that power our energy management and sustainability platforms. You will work with Java 21 and Spring Boot 3.5 to create scalable systems that process real-time energy data, integrate with industrial equipment, and provide RESTful APIs for our front-end applications. The ideal candidate will develop multi-threaded, event-driven services that handle diverse protocols (MQTT, SFTP, SQL) and ensure our platform can scale to support enterprise clients with thousands of connected devices.

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Key Responsibilities:

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Microservices Development

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Develop microservices using Java 21 and Spring Boot 3.5 with focus on performance and scalability Design and implement RESTful APIs following best practices and OpenAPI specifications Write clean, maintainable, and well-tested code following SOLID principles Develop automated tests using JUnit, Mockito, and REST Assured Participate in code reviews and contribute to back-end architecture decisions

Data Processing & Integration

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Build event-driven processing systems using MQTT for real-time energy data ingestion Implement multi-threaded processing to handle high-volume data streams efficiently Develop data integration modules supporting multiple protocols (MQTT, SFTP, SQL, REST) Design and optimize database schemas for relational and time-series data Implement load balancing strategies and ensure high availability of services

Cloud & DevOps Integration

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Integrate with AWS services (ECS, SSM, S3, etc.) for cloud-native deployments Implement monitoring and logging using CloudWatch, Grafana, and custom metrics Collaborate with DevOps team to optimize deployment pipelines and infrastructure Debug and optimize performance bottlenecks in production systems

Agile Collaboration

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Collaborate with front-end developers to define API contracts and data models Work within SAFe Agile methodology using Jira for task management Contribute to technical documentation in Confluence Participate in sprint planning, daily standups, and retrospectives

Qualifications

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Education

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Bachelor's or Master's degree in Computer Science, Engineering, or related field, or equivalent professional experience

Experience

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Minimum of 3 years of professional back-end development experience with Java Strong experience with Spring Boot framework (version 3.x preferred) Solid understanding of RESTful API design and implementation Experience with relational databases (PostgreSQL, MySQL) and SQL Experience with multi-threaded programming and concurrent processing Experience with MQTT protocol and message-oriented middleware (desirable) Experience with time-series databases (InfluxDB, TimescaleDB) (desirable) Experience with event-driven architecture and asynchronous processing (desirable) Knowledge of energy data protocols or industrial IoT systems (desirable)

Technical Skills

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Core:

Java 21, Spring Boot 3.5, RESTful API design (required)

Protocols:

MQTT, SQL, SFTP, REST API, load balancing (required)

Processing:

Multi-threaded programming, event-based architectures (required)

Database:

SQL databases, understanding of time-series data

Cloud:

AWS services (ECS, SSM, CloudWatch), Docker

Tools:

Git/GitHub, Jira, Confluence, IntelliJ IDEA or similar IDE (required)

Testing:

JUnit, Mockito, REST Assured (required)

Monitoring:

CloudWatch, Grafana, InfluxDB, Telegraf Experience with Apache Kafka, Redis, or RabbitMQ (desirable) Knowledge of security best practices and OAuth2 (desirable) Understanding of microservices patterns (circuit breaker, saga, etc.) (desirable)

Soft Skills

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Write clean, efficient, and maintainable code following best practices Strong problem-solving skills and ability to debug complex issues Understanding of microservices architecture and distributed systems concepts Proficient with Git version control and collaborative development workflows Experience with test-driven development and automated testing Ability to work independently while collaborating effectively with the team Eager to learn new technologies and continuously improve skills Good communication skills to discuss technical solutions with team members

Languages

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Fully proficient in English both written and spoken (required) Knowledge of French or German (desirable)

Certifications

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Java certifications (Oracle Certified Professional) (desirable) Spring Professional Certification (desirable) AWS certifications (Cloud Practitioner, Developer Associate) (desirable)

Additional Information

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Relocation Assistance Provided:

No