Senior Java Backend Developer

YO AI Labs; Noord-Holland; Hybrid; EUR 90,000 - 120,000; Full time

Job summary

YO AI Labs in the Netherlands seeks a Senior Java Backend Developer to design, develop, and scale backend services in a hybrid environment. You will own RESTful APIs, microservices, and cloud-native components using AWS, DynamoDB, Spring Boot, and distributed systems practices.

The role requires 7–12 years of hands-on Java experience, strong problem-solving, and a track record delivering high-volume software.

Qualifications

• 7+ years of professional experience in Java backend development.
• Proficiency in Java 8/11/17+ with OOP and design patterns.
• Hands-on Spring Boot and microservices design/implementation.
• Experience designing REST APIs with validation and error handling.
• AWS cloud-native development experience.
• Strong NoSQL/DynamoDB schema design and optimization.
• Version control with Git and best practices.
• Experience with large-scale distributed systems.
• Knowledge of performance optimization and scalability.
• Experience with monitoring/observability tools like Grafana.

Responsibilities

• Design, develop, test, and deploy scalable backend applications using Java and Spring Boot.
• Build and maintain microservices-based architectures and RESTful APIs for high-volume traffic.
• Develop cloud-native apps leveraging AWS services.
• Design and optimize DynamoDB schemas and NoSQL data models.
• Write clean, maintainable code and conduct code reviews.
• Debug, tune performance, and ensure system reliability across distributed environments.
• Implement monitoring with Grafana and related tools.
• Collaborate with product, QA and DevOps to deliver secure, scalable solutions.
• Contribute to architecture discussions and SDLC documentation.

Skills

Java Backend

Spring Boot

REST APIs

DSA

AWS

DynamoDB

Git

Grafana

Docker

Kubernetes

Tools

Git

Docker

Kubernetes

Grafana

Job description

Job Description

Role : Senior Java Backend Developer

Location :Netherlands - North Holland

Domain : Information technology (IT)

Experience : 7 - 12 Years

Job Type : Hybrid (1 Year Contract)

Key Responsibilities:

• Design, develop, test, and deploy scalable backend applications using Java and Spring Boot.
• Build and maintain microservices-based architectures and RESTful APIs that serve high-volume traffic.
• Develop cloud-native applications leveraging AWS services and best practices.
• Design and optimize database solutions using NoSQL technologies, particularly DynamoDB.
• Write clean, maintainable, and high-quality code while adhering to coding standards and architectural best practices.
• Participate in code reviews, identify bugs, and provide constructive feedback to team members.
• Debug complex issues, perform performance tuning, and optimize system efficiency across distributed environments.
• Implement monitoring and observability solutions using Grafana and related tools to ensure system reliability.
• Collaborate with cross-functional teams including product, QA, and DevOps to deliver reliable, secure, and scalable solutions.
• Contribute to architecture discussions and support the development of large-scale, distributed applications.
• Maintain comprehensive technical documentation and ensure adherence to SDLC processes.
• Stay updated with industry trends and emerging technologies in backend development and cloud computing

Required Qualifications:

• 6+ years of professional experience in Java Backend DevelopmentStrong proficiency in Java 8/11/17+ with deep understanding of OOP concepts and design patterns.
• Hands-on expertise in Spring Boot and microservices architecture design and implementation.
• Strong understanding of Data Structures & Algorithms (DSA) and proven problem-solving skills.
• Demonstrated experience designing and developing REST APIs with proper error handling and validation
• Hands-on experience with AWS services and cloud-native application development.
• Strong experience with NoSQL databases, particularly DynamoDB, including schema design and optimization.
• Proficiency with Git and version control best practices.
• Proven experience working on large-scale, high-volume distributed systems.
• Strong understanding of application scalability, resiliency, and performance optimization principles.
• Experience with monitoring and observability tools such as Grafana.
• Excellent debugging, analytical, and coding skills with attention to detail

Technical Environment:

• Languages & Frameworks: Java 8/11/17+, Spring Boot, Spring Cloud.
• Databases: DynamoDB, NoSQL databases.
• Cloud Platform: AWS (EC2, S3, Lambda, RDS, etc.).
• Tools & Technologies: Git, Grafana, Docker, Kubernetes (preferred).
• Architecture: Microservices, RESTful APIs, Distributed Systems.