Mid to Senior-Level React Engineer – GIS & Esri JS API
Are you a skilled React Engineer with a passion for geospatial technologies? Do you thrive in dynamic environments where precision and innovation are crucial? Join Helyx and be part of a team delivering cutting-edge solutions for defence and security applications.
Role Overview
We are seeking an experienced React Developer with expertise in GIS and the Esri JavaScript API to build, optimise, and maintain interactive web applications for our defence and security clients. Your role will involve working with complex geospatial datasets, integrating with mapping services, and creating intuitive user experiences that enhance operational efficiency and situational awareness.
Key Responsibilities
- Develop and maintain interactive GIS-based web applications using React.
- Design and implement scalable, high-performance front-end architectures for mapping solutions.
- Work closely with geospatial analysts and backend developers to deliver seamless applications.
- Integrate geospatial data sources and RESTful APIs to visualise and manipulate data in real-time.
- Optimise application performance and ensure compatibility across different browsers and devices.
- Troubleshoot and resolve issues related to geospatial data rendering and interactivity.
- Contribute to the adoption of best practices in modern front-end development.
- Maintain high standards of security, performance, and usability in all projects.
What You Bring to the Table
- Strong proficiency in React.js, including hooks, component lifecycle, and performance optimisation.
- Solid understanding of JavaScript (ES6+), TypeScript, and modern front-end tooling.
- Familiarity with GIS data formats (GeoJSON, WMS, WFS, KML, etc.) and working with geospatial databases.
- Experience with RESTful API development.
- Exposure to mapping libraries such as Arcpy, Leaflet, OpenLayers, or Mapbox is beneficial.
- Strong problem-solving skills and the ability to work in a fast-paced, agile environment.
- UK Security Clearance (or eligibility to obtain Developed Vetting for sensitive projects – UK Nationals only).
Nice to Have
- Experience with the ArcGIS API for JavaScript.
- Experience integrating with ArcGIS services such as ArcGIS Enterprise.
- Knowledge of graph computing frameworks such as NetworkX or SigmaJS.
- Understanding of building and/or exploiting machine learning models.
- Software design or architecture experience.
- Leadership or mentoring experience.
- Familiarity with backend technologies such as Python, FastAPI, and relational databases.
- Cloud deployment experience (AWS, Azure, or GCP).
Location
This role is home-based with occasional travel to the Helyx office in Twyning and to client sites around the UK.
What’s in It for You
- Competitive salary based on experience.
- Generous bonus incentives recognising contributions.
- 9% pension plan, healthcare coverage, and life cover.
- 10 days per year for professional development (5 formal training days + 5 personal development days).
- Salary Sacrifice ULEV car scheme – promoting sustainability.
- Wellbeing allowance to support your physical and mental health.
- A commitment to ongoing learning and career development.
Join Us!
If you’re a React Engineer passionate about GIS, eager to work on impactful projects, and looking for an opportunity to shape the future of defence and security technologies, apply today!
Next Steps
Express your interest on LinkedIn or contact our recruitment team at [email protected] or via Contact Us – Helyx
Helyx is an equal opportunities employer.
NO AGENCIES