Senior Frontend Developer (React) - Freelance

Opportunity

Join ILIAS Solutions and take a leading role in making mission-critical products for the defense industry. We are seeking an expert Senior Frontend Developer to join our Data Platform team within the Defense Capability Management unit.

The ideal candidate is a technical leader who can work autonomously with minimal supervision. In this role, you will not just build dashboards; you will architect and build the frontend foundation of a robust Data Platform. You will develop the tools and interfaces that allow our defense clients to configure, manage, and monitor heavy data streams effectively. You must possess strong communication skills to drive architectural decisions and contribute to effective knowledge sharing within the team.

Your mission

Key Responsibilities

• Platform Architecture: Architect and develop a scalable, component-based frontend framework using React that serves as the backbone for our data applications.
• Mission-Critical Engineering: Build reliable, high-availability interface components that ensure the stability of the Data Platform in secure defense environments.
• Tooling & Integration: Create the UI/UX workflows that allow users to manage Apache Spark jobs, object storage (MinIO), and complex data pipelines.
• System Connectivity: Seamlessly integrate frontend architectures with backend services (Java/Spring Boot) to expose platform configuration and management capabilities.
• Code Quality: Enforce strict coding standards, write clean and testable code, and maintain a library of reusable components for the wider team.
• Technical Leadership: Collaborate with backend engineers to define the technical roadmap and mentor team members.
• Troubleshooting: Independently diagnose and resolve complex issues within the platform’s frontend stack.

Your capabilities

Required Technical Skills

Frontend Development

• React Ecosystem: Expert proficiency with React.js (Hooks, Context API) and state management (e.g., Redux).
• Platform Engineering: Experience building SaaS platforms, internal tools, or complex management consoles.
• Core Technologies: Deep understanding of HTML5, CSS3, and modern JavaScript (ES6+) / TypeScript.

Backend Integration & DevOps

• API Consumption: Extensive experience interfacing with complex RESTful APIs.
• Build Systems: Proficiency with Webpack, Vite, and package management (NPM/Yarn).
• Containerization: Familiarity with Docker to support the deployment of frontend assets.

Required Experience & Qualifications

• Bachelor's degree in Computer Science, Software Engineering, or equivalent experience.
• 5+ years of professional software development experience.
• Proven experience building complex, data-intensive platforms or administrative interfaces.
• Agile Maturity: Strong understanding of software development lifecycle and agile methodologies.

Personal Attributes

• Independent Worker: Ability to take ownership of platform components and work autonomously with minimal supervision.
• Team Player: Collaborative mindset with excellent communication skills.
• Problem Solver: Strong analytical and troubleshooting capabilities.
• Quality-Focused: Commitment to writing clean, maintainable, and well-documented code.

Land @ILIAS

Exited and ready to explore how you could fit in? 
Apply directly or reach out to  youness.kaissi@ilias-solutions.com for any questions.
we are thrilled to get to know you!