Senior Fullstack Engineer - Java and React

Lumenalta

Location: Ireland
Job Type: full-time
Salary: Unknown
Posted: May 19, 2025

Job Description

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At Lumenalta, we create impactful software solutions that drive innovation and transform businesses. Since 2000, we’ve partnered with visionary leaders to build cutting-edge tech, solve complex challenges, and deliver results faster through our elite teams and tech-driven approach. Join us in shaping the future of technology.

With over 20 years of fully remote experience, Lumenalta offers:

Fully remote work
Rapid growth opportunities
Self-Improvement
Industry-leading clients
Nurturing engineers’ career paths

What You Will Work On

Collaborate with visionary enterprise clients
Create transformative digital products
Learn how to handle difficult situations
Tackle complex challenges at scale
Push boundaries with emerging technologies

Requirements

Frontend Development:

Expertise in React and JavaScript to craft responsive and intuitive user interfaces.
Experience in integrating APIs for seamless frontend-backend communication.
Skilled in creating responsive UIs tailored for operational personas.
Familiarity with Okta for authentication and role-based access control.

Backend Development:

Proficiency in Java Spring Boot to develop and maintain core backend services.
Experience in creating RESTful APIs for efficient service-to-service communication.
Familiarity with AWS ECS/EKS for deploying scalable applications.

Database/Storage:

Experience with PostgreSQL for relational database management and CRUD operations.
Knowledge of ElasticSearch integration for advanced search functionality.
Competence in data modeling to support application needs.

CI/CD and Automation:

Familiarity with CI/CD tools like Harness to streamline builds, deployments, and infrastructure management.

Additional Requirements:

High-level proficiency in English (written & verbal).
A proactive, team-oriented self-starter who thrives in a collaborative environment.
Ability to engage confidently and effectively on platforms like Zoom.

Why Lumenalta?

Work on meaningful, impactful projects.
Collaborate with a talented, supportive team
Enjoy a flexible, remote-first environment
Join a company that values your growth

If you’re a passionate, career-focused developer ready to make a lasting impact, we want to hear from you!

🎯 Who is this job for?

This role fits a Senior Fullstack Engineer with strong skills in React and Java (Spring Boot), experienced in building scalable, secure, and performant applications. The candidate should be familiar with API integration, AWS ECS/EKS deployment, PostgreSQL, ElasticSearch, and CI/CD pipelines (Harness). Ideal for proactive, collaborative engineers comfortable in remote environments and handling complex enterprise challenges.

💬 Potential Interview Questions

Describe your experience building frontend applications with React and JavaScript.
I have deep expertise in developing responsive, intuitive user interfaces with React, including state management, component design, and API integration to deliver seamless user experiences.
How do you integrate frontend applications with backend services?
I use RESTful APIs and handle data fetching, error handling, and authentication to ensure smooth communication between frontend and backend systems.
What is your experience with authentication and access control, specifically Okta?
I have implemented Okta for secure authentication and role-based access control, managing user sessions and permissions within React applications.
Explain your backend development experience using Java Spring Boot.
I design and maintain scalable backend services with Spring Boot, focusing on creating REST APIs, handling business logic, and ensuring service reliability.
How have you used AWS ECS/EKS for application deployment?
I deploy containerized applications using AWS ECS and EKS, managing orchestration, scaling, and monitoring for high availability.
What experience do you have with PostgreSQL and data modeling?
I design relational schemas and write efficient queries for PostgreSQL to support application data needs, ensuring data integrity and performance.
How have you integrated ElasticSearch in your projects?
I have used ElasticSearch to provide advanced search capabilities, including indexing, querying, and optimizing search performance.
What CI/CD tools have you worked with, and how do they improve development workflows?
I use tools like Harness to automate builds, tests, and deployments, improving release speed and consistency while reducing errors.
How do you approach collaboration in remote, cross-functional teams?
I prioritize clear communication, active participation in meetings, and use tools like Zoom and Slack to maintain alignment and foster teamwork.
How do you stay current with emerging technologies and best practices?
I engage with tech communities, follow industry news, attend webinars, and experiment with new tools to continuously enhance my skills and deliver innovative solutions.

📋 Job Summary

Lumenalta is a fully remote, fast-growing company delivering innovative software solutions to visionary enterprise clients. They seek a Senior Fullstack Engineer skilled in React and Java Spring Boot to build responsive UIs and scalable backend services. The role involves working with PostgreSQL, ElasticSearch, AWS ECS/EKS, and CI/CD tools like Harness, focusing on API integration and secure authentication with Okta. Join a collaborative team that values your growth and offers meaningful projects in a flexible, remote-first environment in Ireland.