Senior Full Stack Engineer

JR United Kingdom; Watford; Remote; GBP 60,000 - 85,000; Full time

Job summary

A high-growth tech startup is seeking a Senior Full-Stack Developer to shape their innovative platform. In this role, you'll lead full-stack development using technologies like NestJS and React, influencing the technical direction and contributing to system architecture while working in a fast-paced environment.

Qualifications

• 5–6+ years of experience in full-stack roles.
• Solid experience with API integration.
• Comfortable in dynamic startup environments.

Responsibilities

• Lead full-stack development using NestJS, MongoDB, React, and TypeScript.
• Integrate third-party APIs and contribute to system architecture.
• Deliver responsive web interfaces and implement testing strategies.

Skills

Full-stack development

API integration

Problem-solving

Team collaboration

Tools

NestJS

MongoDB

React

TypeScript

Docker

AWS

Vercel

GCP

Next.js

TailwindCSS

Job description

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Senior Full Stack Engineer, watford, hertfordshire

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Client:

TechNET IT Recruitment Ltd

Location:

watford, hertfordshire, United Kingdom

Job Category:

Other

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EU work permit required:

Yes

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Job Views:

4

Posted:

31.05.2025

Expiry Date:

15.07.2025

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Job Description:

Senior Full-Stack Developer – High-Growth Tech Startup

Location: Remote

Salary: Up to £85,000

This ambitious, early-stage tech startup is transforming how digital platforms leverage data and automation. Backed by a growing client base and a clear product vision, they are building a solution that integrates complex data sources to power real-time insights and streamlined workflows.

They are now seeking a Senior Full-Stack Developer to join their lean, high-performing team. This is a pivotal opportunity for someone who thrives in fast-paced environments, enjoys autonomy, and brings deep technical experience across both frontend and backend development.

You’ll take ownership of end-to-end feature development from shaping APIs to delivering high-performance user interfaces helping define the technical direction of a rapidly evolving product.

Responsibilities

• Lead full-stack development using NestJS, MongoDB, React, and TypeScript.
• Integrate and manage third-party APIs, including Meta’s API and a separate API for aggregating social media data.
• Contribute to system architecture and backend service design, including authentication and data flow across services.
• Deliver responsive, accessible, and performant web interfaces with Next.js and TailwindCSS.
• Collaborate with design, product, and engineering peers to bring new features to life.
• Implement robust testing strategies using Jest and other modern QA tools.
• Participate in code reviews and help define best practices for the engineering team.
• Communicate complex technical ideas clearly to both technical and non-technical stakeholders.
• Champion continuous improvement and a culture of experimentation and learning.

Requirements

• 5–6+ years of experience in full-stack development roles.
• Solid experience with API integration (GraphQL, REST, OAuth).
• Familiarity with infrastructure tools like Docker or cloud platforms (e.g., AWS, Vercel, or GCP).
• Comfortable working in dynamic startup environments with shifting priorities.
• Demonstrated ability to take ownership of features from concept to release.
• Excellent problem-solving and communication skills.
• A collaborative, adaptable mindset and willingness to support teammates and business goals even if that means getting hands-on with unfamiliar tools or occasionally working outside of regular hours.