Full-stack Technical Lead (Java+React)

N-iX; Barcelona; Hybrid; EUR 75,000 - 105,000; Full time

Benefits offered by this job

Flexible working format

Competitive salary

Career growth and development

Education reimbursement

Team events

Job summary

N-iX, a global software development company, seeks an experienced Technical Lead / Full Stack Engineer (Java + React) to guide a high-performing Barcelona-based team. You will shape architecture, drive engineering excellence, and partner with product owners to deliver scalable, secure applications that power strategic initiatives.

This role blends leadership with deep technical execution: mentoring engineers, championing TDD/BDD, CI/CD, and microservices, and championing XP practices including

Qualifications

• BS degree in Computer Science or equivalent.
• 6+ years of full-stack development experience.
• 6+ years of Java and Spring experience.
• 2+ years in front-end development with React.
• Experience with reactive UI and Java Streams.
• 2+ years in TDD/BDD with JUnit/Jasmine/Mockito/Protractor/Selenium.
• 2+ years of microservices-based architecture (Spring Boot/Cloud).
• DevOps experience with Jenkins; cloud/hybrid deployments; Kubernetes.
• Strong leadership and prioritization skills.
• Excellent English (verbal and written).

Responsibilities

• Guide, mentor, and foster growth of full-stack engineers.
• Lead architectural design and technical direction of applications.
• Establish code quality, testing, CI/CD, and DevOps practices.
• Collaborate with product owners to translate requirements into tech strategy.
• Direct full-stack development and remote pairing activities.
• Own end-to-end development lifecycle from design to deployment.
• Promote XP practices in a highly collaborative environment.

Skills

Full-stack development

Java & Spring

React

TDD/BDD

JUnit/Jasmine/Mockito

Microservices

DevOps (Jenkins)

Kubernetes

Cloud & containers

Leadership

English fluency

Education

BS in Computer Science

Tools

Jenkins

Kubernetes

CloudFoundry

Job description

N-iX is a global software development service company that helps businesses across the globe create next-generation software products. Founded in 2002, we unite 2,400+ tech-savvy professionals across 40+ countries, working on impactful projects for industry leaders and Fortune 500 companies. Our expertise spans cloud, data, AI/ML, embedded software, IoT, and more, driving digital transformation across finance, manufacturing, telecom, healthcare, and other industries. Join N-iX and become part of a team where your ideas make a real impact.

Nowadays, finding a long‑term job with an interesting project can feel like a real challenge.

But hey — if you're an experienced Technical Lead / Full Stack Engineer (Java + React), look no further!

Yes, it's real. You're not dreaming. Miracles do exist!

When it comes to our customer – a strategic partner of ours in the integrated Shipping Services. They have set themselves apart as an independent carrier with a fresh, unique approach. Their strategy as a global niche carrier offers distinctive advantages to customers worldwide. We have created a smart, efficient network that ensures stable, reliable services; and we have made it our mission to focus on the needs of our customers, which stand at the heart of all our decisions. The main idea of our product operates in select trades, where it has a competitive advantage and where it can provide superior service. We maintain a flexible partnership approach with other major carriers, and our new line structure is a much‑needed alternative to customers concerned about the current alliance‑dominated market.

Responsibilities:

• Guide, mentor, and foster the growth of full-stack engineers within the team, championing engineering excellence and XP practices.
• Lead the architectural design and technical direction of innovative full-stack applications, ensuring scalability, security, and alignment with business goals.
• Establish and champion high standards of code quality, testing (TDD/BDD), CI/CD pipelines, and robust DevOps practices.
• Act as a key technical point of contact, collaborating closely with product owners and stakeholders to translate complex requirements into actionable technical strategies.
• Direct full-stack development of innovative applications, remaining actively involved in writing code and remote pairing.
• Own the entire development cycle, including design, architecture, development, testing, and DevOps deployment.
• Foster a highly collaborative Extreme Programming (XP) environment featuring remote pairing and rapid feedback loops.

Requirements:

• BS degree in Computer Science or an equivalent combination of education and experience.
• Experience in technical leadership is a must.
• 6+ years of full-stack development experience.
• 6+ years of experience in the following technologies: Java, Spring.
• Proven experience with Functional Programming and Java Streams.
• 2+ years of experience in front-end development with React.
• Experience with developing a reactive UI (Reactive JS).
• 2+ years of experience in TDD/BDD development in the following frameworks: JUnit, Jasmine, Mockito, Protractor/Selenium.
• 2+ years of experience in microservices-based architecture and tools (Spring Boot/Cloud).
• AI experience
• Experience in DevOps development and Jenkins (must).
• Experience in development in Kotlin – an advantage.
• Experience in designing, developing, and deploying cloud/hybrid-based solutions.
• Experience in developing and deploying in Container-based environments (Kubernetes, Cloud Foundry).
• Deep familiarity with the following design concepts: microservices, service discovery, circuit breakers.
• Strong leadership abilities with the capacity to appropriately prioritize, plan, and delegate complex work in a rapidly changing environment.
• Versatility and capability to switch easily between different tasks and technologies.
• Experience in assessing a broad range of information solutions and products.
• Strong critical thinker with an exceptional problem-solving aptitude.
• Excellent English skills - both verbal and written.

We offer*:

• Flexible working format - remote, office-based or flexible
• A competitive salary and good compensation package
• Personalized career growth
• Professional development tools (mentorship program, tech talks and trainings, centers of excellence, and more)
• Active tech communities with regular knowledge sharing
• Education reimbursement
• Memorable anniversary presents
• Corporate events and team buildings
• Other location-specific benefits
• not applicable for freelancers