Senior Full Stack Engineer (Team Lead)

Madfish; United Kingdom; Hybrid; GBP 60,000 - 80,000; Full time

Job summary

A dynamic tech company in the United Kingdom is seeking a Senior Full Stack Engineer to lead a small engineering team focused on developing customer-facing web platforms and APIs. This role emphasizes hands-on engineering, team leadership, and architectural decision-making while working with technologies like React, Node.js, and AWS. The ideal candidate has over 5 years of experience in software development and proven leadership abilities. If you are ready to make an impact, apply now!

Qualifications

• 5+ years of professional software development experience.
• 3+ years of JavaScript/TypeScript experience.
• 1+ year in a Lead Developer or Team Lead role.

Responsibilities

• Lead a team of engineers and provide mentorship.
• Own development and maintenance of web applications and APIs.
• Drive improvements to CI/CD and infrastructure resiliency.

Skills

TypeScript

React

Node.js

AWS Lambda

Docker

Postgres RDS

CI/CD pipelines

Tools

AWS CloudFormation

Cypress

Vitest

Job description

We are looking for a Senior Full Stack Engineer to lead a small, high-impact engineering team responsible for our customer-facing web platform, public API, and the internal platform powering our AI model training workflows.

This role combines hands-on engineering, technical ownership, and team leadership, with a strong emphasis on system design, architectural decision-making, and cross-functional collaboration.

Key Responsibilities

Team Leadership

• Lead a team of two Full Stack Engineers and one QA Engineer.
• Provide ongoing mentorship, code reviews, and technical guidance.
• Facilitate Scrum ceremonies and ensure smooth sprint execution.
• Maintain high engineering standards, code quality, and delivery velocity.

Technical Ownership

• Own development and maintenance of the customer-facing web application (React + Node.js), external APIs, and the internal AI-training platform.
• Architect, design, and implement backend services using AWS Lambda (serverless) as well as containerized workloads on EC2.
• Oversee performance, scalability, and reliability of Postgres RDS.
• Drive improvements to CI/CD, build pipelines, testing strategy, and infrastructure resiliency.

Ecosystem & Tooling

• Work within a monorepo structure.
• Manage IaC using AWS CloudFormation.
• Maintain monitoring, logging, and alerting pipelines via Coralogix.
• Ensure robust automation with Cypress and Vitest.
• Maintain Docker-based development environments and EC2 deployments.

Cross-Team Collaboration

• Partner with Product Managers to transform requirements into actionable technical plans.
• Coordinate with other engineering teams under the CTO to ensure architectural alignment and shared standards.

Key Projects You Will Own

• Customer-facing web platform (React + Node.js + AWS).
• Internal AI model training platform, including all supporting backend services and tooling.
• Modernization, optimization, and scalability initiatives across the entire stack.

Qualifications

• Strong experience with TypeScript across frontend and backend.
• Hands-on expertise with React, Node.js, AWS Lambda, EC2, Docker, and Postgres RDS.
• Proven experience mentoring or leading engineers.
• Solid understanding of CI/CD pipelines (GitHub Actions), automated testing, logging, and monitoring.
• Ability to collaborate directly with Product and translate requirements into architecture and execution plans.
• 5+ years of professional software development experience.
• 3+ years of JavaScript/TypeScript experience.
• 1+ year in a Lead Developer or Team Lead role.

Nice to Have

• Familiarity with serverless design patterns.
• Experience with performance tuning for Node.js and Postgres.

Ready to take the lead and build impactful products?
Apply now — we’d love to meet you!