Full Stack Software Engineer
Fiddlie Technology Ltd | London | £35,000-40,000 per annum | Full-time, on-site
About Fiddlie
Fiddlie is a contract electronics engineering company providing turnkey product development services to startups and SMEs. We design, prototype, and support manufacturing for innovative hardware products across diverse sectors. Our team of 8 engineers works on challenging projects spanning RF systems, embedded devices, IoT products, and connected hardware.
The Role
We're seeking a pragmatic Full Stack Software Engineer to join our London team. You'll work on web dashboards, mobile apps, embedded interfaces, and backend systems that bring our clients' hardware products to life. This is a hands-on role requiring independence, technical versatility, and the ability to ship working solutions on commercial timelines.
You'll be working closely with electronics engineers, collaborating on firmware-software integration, developing user interfaces for hardware products, and building the full stack infrastructure our clients need to launch successfully.
Requirements
Essential:
- Minimum 2 years of professional software development experience (industry roles, not academic projects)
- Bachelor's degree from a QS Top 100 university
- Strong proficiency in TypeScript/JavaScript
- Proven ability to own projects from requirements through to deployment
- Right to work in the UK (we are not offering visa sponsorship for this position)
- Comfortable working on-site full-time in our London office
Highly Desirable:
- Experience with React for web applications
- SQL database design and optimization
- Flutter/Dart for cross-platform mobile development
- Python for scripting, data processing, or backend services
- C++ for performance-critical applications or embedded/firmware integration
- Understanding of hardware-software integration (APIs for IoT devices, sensor data handling, BLE/WiFi protocols)
- Experience working in startup, consulting, or fast-paced project environments
- Portfolio demonstrating shipped commercial products
Beneficial:
- Familiarity with cloud infrastructure (AWS, Azure, GCP)
- API design and RESTful services
- DevOps practices and CI/CD pipelines
- Technical writing and client-facing communication
- Interest in electronics, hardware, or physical product development
What We Value
We're looking for someone who is:
- Commercially focused – understands project constraints, budgets, and delivering value to clients
- Self-directed – can scope work, make technical decisions, and drive projects forward independently
- Pragmatic – chooses appropriate solutions over perfect ones; ships working code
- Collaborative – works effectively with our hardware team and directly with clients when needed
- Resilient – comfortable with the variety and pace of consulting work across different technical stacks
We appreciate team members who take a practical, results-oriented approach to problem-solving and who thrive in an environment that values merit, accountability, and commercial success.
Benefits
- Competitive salary: £35,000-40,000 per annum (dependent on experience)
- Company pension scheme
- AXA comprehensive health insurance and travel insurance
- Unrestricted access to company facilities for personal projects – including electronics lab, 3D printers, CNC machines, oscilloscopes, network analyzers, and prototyping equipment
- Exposure to diverse technical challenges across hardware and software
- Work directly on products that ship to market
- Small team environment with direct input on technical decisions
How to Apply
Please send your CV, a brief cover letter explaining your interest in the role, and links to relevant portfolio work or GitHub to careers@fiddlie.com.
We review applications on a rolling basis and will contact suitable candidates for an initial technical discussion.