Lead Java Full Stack Developer

Emergn; Polska; Remote; PLN 240,000 - 420,000; Full time

Benefits offered by this job

Remote work within Poland

Global, collaborative team

Professional development opportunities

Job summary

Emergn is seeking a Lead Java Full Stack Developer to join a dynamic, remote-friendly team based in Poland. You will lead the design and delivery of scalable Java applications, ensuring alignment with business needs and best practices.

You will mentor peers, drive architecture decisions and collaborate with cross‑functional teams to deliver high‑performing solutions. A deep background in Java, Spring, REST, and front-end tech is essential for success.

Qualifications

• 8+ years of Java development with high‑performance applications.
• Experience in Spring, Spring Boot, Hibernate and RESTful APIs.
• Front‑end skills with Angular or React; cloud and containerization knowledge.

Responsibilities

• Provide technical leadership in designing, coding, testing and deploying Java-based applications.
• Collaborate with cross‑functional teams to define scope, architecture and 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

RESTful APIs

Angular/React

Tech leadership

Agile methodologies

Tools

Docker

Kubernetes

AWS

Azure

Git

New Relic

Job description

Lead Java Full Stack Developer

Department: Java

Employment Type: Contract

Location: Poland

Description

Emergn is a technology and management consultancy with a mission to set our clients free. No dependency. No short-term fix. Just teaching them the real cure to their problems, so they can stay ahead of their competitors now and forever.

A different kind of consultancy like this needs a different kind of team. One you might be just the right fit for.

This is a place for people who want to:

– Make a real difference. Here, you solve problems for real. No endless engagements or running up the clock. You get to see how change really works for some of the world’s greatest businesses.

– Never stop growing. We turn our expertise back on ourselves. Here, you’re always learning, stretching your thinking at the cutting edge of how organizations grow, which means staying at the cutting edge of your own growth too.

– Belong everywhere. We’re a global community of experts who work without borders. Friendly, supportive, and genuinely collaborative. Because when you’re trying to change an industry, you need people who have each other’s backs.

As a Lead Java Full Stack Developer at Emergn you will build scalable, high-performance Java applications. You design, develop and maintain complex, scalable, high-performance Java applications. You will provide technical leadership and make sure deliverables align with best practices and business requirements.

Join our team and let’s change the game together!

We want you to:

• 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.

This job might be for you if you have:

• 8+ years of experience in Java development focused on high-performance applications, with strong expertise in Spring, Spring Boot and Hibernate.
• Experience with RESTful API development and front-end technologies such as Angular and React, with solid Angular experience.
• Knowledge of cloud platforms (AWS, Azure) and containerization (Docker, Kubernetes), including AWS Cloud Practitioner Essentials, AWS Technical Essentials and AWS Solutions Architect Essentials.
• Knowledge of observability and New Relic, including New Relic Observability Foundations and Observability Practitioner.
• Proficiency in version control (Git) and CI/CD pipelines.
• Proven experience in technical leadership, project management and agile methodologies, with clear communication of technical solutions.
• Claude Code experience and an agentic mindset.

You might also have:

• Experience in microservices architecture.
• Familiarity with DevOps practices.
• Advanced knowledge of database management (SQL, NoSQL).

Location requirement:

• This opportunity requires you to be based in Poland.

What we offer:

• Work within a dynamic international team of experts.
• Excellent opportunity for personal and professional development.
• Ability to work remotely within Poland.
• Ability to work with modern technologies.