Senior Web Developer

mPrest; London; On-site; GBP 50,000 - 80,000; Full time

Job summary

A leading company in the Defense and Energy sectors is seeking a Senior WEB Developer to be the Frontend Tech Lead. This hands-on role emphasizes frontend architectural design and technology leadership, requiring in-depth expertise in React and modern web technologies. Candidates will engage directly with clients, ensuring high service levels and quality development practices.

Qualifications

• 5+ years of professional frontend development experience with a strong focus on React.
• Proven experience as a Tech Lead or in leading frontend projects.
• Hands-on experience with modern development pipelines.

Responsibilities

• Serve as the Technical Lead for frontend activities within the division.
• Define and implement frontend architecture for complex systems.
• Collaborate with backend developers and customers.

Skills

React

JavaScript (ES6+)

TypeScript

HTML5

CSS3

Frontend Architecture Design

Education

B.Sc. in Computer Science

Relevant frontend or React certifications

Tools

Webpack

Babel

Vite

ESLint

Prettier

Job description

We are seeking a highly experienced and motivated Senior WEB Developer to serve as the Frontend Tech Lead for our Defense and Energy Divisions.
This is a hands-on technical leadership role, leading frontend technology direction, architectural design, and development practices across projects.
The role requires direct interaction with customers, high service orientation, and strong expertise in frontend architecture and best practices.
Responsibilities:

• Serve as the Technical Lead for frontend activities within the division.
• Define, design, and implement frontend architecture for complex systems.
• Lead hands-on development efforts in React and associated modern technologies.
• Collaborate closely with backend developers, UI/UX designers, project managers, and customers.
• Review, guide, and improve code quality, development practices, and technical documentation.
• Act as a technical point of contact for customer-facing engagements, workshops, and technical discussions.
• Stay up-to-date with the latest trends and best practices in frontend and React development.

Must Have

• 5+ years of professional frontend development experience, with a strong focus on React (Hooks, Context API, Redux, etc.).
• Proven experience as a Tech Lead or leading technical initiatives in frontend projects.
• Strong expertise in frontend architecture design, modularization, and scalable application structure.
• Excellent JavaScript (ES6+) and TypeScript skills.
• Deep understanding of HTML5, CSS3 and responsive web design principles.
• Hands-on experience with build tools and modern development pipelines, including at least two of the following: Webpack, Babel, Vite, ESLint, Prettier, etc.
• Experience working in secure, On-Premise environments (closed networks).

Nice to Have

• Exposure to CI/CD pipelines and DevOps processes for frontend (GitLab CI, Jenkins, Docker - advantage).
• Familiarity with frontend development for Command and Control Systems (C2 Systems) or similar mission-critical platforms.
• Experience with state management libraries: Redux Toolkit, Recoil, Zustand.
• Knowledge of testing frameworks: Jest, React Testing Library, Cypress.
• Experience integrating frontend applications with RESTful APIs, WebSocket, and real-time data streams.
• Familiarity with frontend security best practices (e.g., OWASP Top 10 for Web).
• Experience working with design systems and UI component libraries (e.g., Material-UI, Ant Design).
• Familiarity with mapping libraries (Mapbox, Leaflet, ArcGIS JS API) - advantage.
• High customer-facing skills:
• Ability to engage professionally with clients, gather requirements, and present solutions clearly.
• Service-oriented mindset: proactive, flexible, and responsive to customer needs.

Education:
B.Sc. in Computer Science, Software Engineering, or a related field (preferred).
Alternatively, graduates of technological military units.
Relevant frontend or React certifications (advantage).

mPrest