Frontend JavaScript Engineer

TL;DR

Frontend JavaScript Engineer (React/Node): Building modern web and mobile applications that integrate with hardware systems used on live construction sites with an accent on front-end development, data synchronisation, and performance optimisation. Focus on developing software for Raspberry Pi and connected devices, collaborating with R&D team in agile environment, and contributing to product improvements.

Location: Hitchin, Hertfordshire | Hybrid (2–3 Days Onsite)

Salary: £60,000–£70,000

Company

High-growth construction technology company building innovative software and hardware solutions used across major infrastructure and road construction projects with international expansion.

What you will do

• Build front-end applications using React.js and modern JavaScript
• Develop software for web, mobile, and hardware-integrated systems including Raspberry Pi
• Work with Node.js, Electron.js, REST APIs, OAuth, and data synchronisation
• Collaborate closely with R&D team in agile environment
• Contribute to performance optimisation, testing, and product improvements

Requirements

• 5+ years of commercial JavaScript development experience
• Strong front-end development background across web and mobile
• Experience working within agile software teams
• Comfortable working in smaller, fast-moving environments
• Strong communication skills and ability to work autonomously

Nice to have

• GIS or mapping platforms
• Mobile app development
• IoT or hardware/software integrated products
• Start-up or scale-up environments

Culture & Benefits

• Fast-growing technology business with international expansion plans
• Opportunity to work on products with real-world impact
• Broad technical exposure across software, hardware, and automation
• Flexible hybrid working environment (2–3 days onsite in Hitchin)
• 25 days holiday + bank holidays, share option scheme after 12 months
• Flexible working hours, equipment and training provided, strong progression opportunities

Hiring process

• Two-stage informal process
• Introductory Teams call
• Onsite technical and culture discussion with leadership team (no formal testing)