Senior Java Full-Stack Tech Lead - Build High-Performance Apps

Emergn; Greater London; Remote; GBP 76,000 - 102,000; Full time

Benefits offered by this job

Health and life insurance

23 vacation days yearly

Birthday gift

Educational programs

Job summary

Emergn is seeking a Lead Java Full Stack Developer to build scalable, high-performance Java applications and provide technical leadership across teams. You will design, develop and maintain complex systems while ensuring alignment with best practices and business needs.

The role requires 8+ years of Java experience, strong Spring/Spring Boot, RESTful APIs, and frontend skills (Angular/React). A flexible work model is offered with a Portugal-based position and opportunities for learning and

Qualifications

• 8+ years of experience in Java development focusing on high-performance applications.
• Strong expertise in Spring, Spring Boot and Hibernate.
• Experience with RESTful API development and front-end technologies (Angular/React).
• Knowledge of cloud platforms (AWS/Azure) and containerization (Docker/Kubernetes).
• Proficiency in observability tools (New Relic).
• Experience with Git and CI/CD pipelines.
• Proven leadership, project management and agile experience.

Responsibilities

• Provide technical leadership in designing, coding, testing and deploying Java-based applications.
• Collaborate with cross-functional teams to define project scope, architecture and delivery timelines.
• Conduct code reviews and promote coding standards and best practices.
• Troubleshoot, debug and optimize applications for performance and scalability.
• Mentor other developers and facilitate knowledge sharing.

Skills

Java development

Spring / Spring Boot

Hibernate

RESTful APIs

Angular

React

Cloud platforms

Docker

Kubernetes

Git / CI-CD

Technical leadership

Agile methodologies

Claude Code / agentic mindset

Tools

Docker

Kubernetes

AWS

Azure

New Relic

Angular

React

Git

Job description

Emergn is seeking a Lead Java Full Stack Developer to build scalable, high-performance Java applications and provide technical leadership across teams. You will design, develop and maintain complex systems while ensuring alignment with best practices and business needs.

The role requires 8+ years of Java experience, strong Spring/Spring Boot, RESTful APIs, and frontend skills (Angular/React). A flexible work model is offered with a Portugal-based position and opportunities for learning and