Senior Full-Stack Developer (React, Node.js, SaaS) On-Site in Derby
Location: Derby, UK (On-site)
Employment Type: Full-time
About the Role
We are looking for a Senior Full-Stack Developer (or Upper Mid-Level Full-Stack Engineer) to join our in-office team to mentor junior developers and help build, scale and contribute to the best practices of our cutting-edge SaaS platform.
This role is perfect for an experienced Full-Stack Web Developer with expertise in React, Next.js, Node.js, MongoDB, Redis, Docker, NGINX, and SCSS. You’ll work on scalable web applications, shape technical architecture, and craft high-quality, hand-written styles using SCSS.
If you’re passionate about modern web technologies, performance optimisation, and building polished user experiences, we’d love to hear from you!
Tech Stack & Tools
* Frontend: React, Next.js, SCSS (handwritten styles, no bloated UI libraries), TypeScript
* Backend: Node.js, REST APIs
* Databases: MongoDB, Redis (SQL experience is a plus)
* Deployment & DevOps: Docker, NGINX, CI/CD
* Other: Git, Agile, Cloud services (AWS/Azure/GCP)
Key Responsibilities
* Develop and maintain high-performance SaaS applications.
* Work across the full stack (frontend, backend, database, and deployments).
* Take ownership of key features and architectural decisions.
* Optimise applications for speed, security, and scalability.
* Write clean, maintainable SCSS for highly polished UI/UX.
* Deploy and manage containerised applications using Docker & NGINX.
* Perform code reviews, testing, and troubleshooting.
* Mentor junior developers and contribute to best practices.
* Stay updated with new technologies and industry trends.
Requirements
* Strong React.js & Next.js development experience.
* Expert knowledge of Node.js for backend development.
* Hands-on experience with MongoDB and Redis (SQL knowledge is a plus).
* Experience with Docker & NGINX for deployments.
* Strong understanding of authentication, security, and performance optimisation.
* Experience with Git, Agile, and CI/CD workflows.
* Proven experience writing hand-crafted SCSS for maintainable and scalable styles.
* Excellent problem-solving skills and the ability to work in a collaborative team.
Nice-To-Have Skills
⭐ Experience with real-time technologies (WebSockets, MQTT, WebRTC).
⭐ Familiarity with cloud services (AWS, Azure, GCP).
⭐ DevOps and automation experience.
What We Offer
Salary of £45,000-£55,000 (based on knowledge and experience)
All-employee profit share scheme – your success is our success!
25 days holiday + 8 bank holidays (with flexible bank holidays).
Exclusive employee perks and discounts.
Flexible start and finish times to suit your schedule.
Employee wellbeing scheme – because your health matters.
Awesome social events – we work hard and have fun doing it!