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Full-Stack Developer

Sigma Consulting Group -
London

Quick apply

Job details

Full-time
£50,000 a month

Qualifications

React
WordPress
DevOps
Database design
PHP
AWS
Docker
Continuous improvement
JavaScript
PostgreSQL
REST
B2B
APIs
MySQL

Full job description

Full-Stack Developer (Founding Engineer)

Location: London, United Kingdom (Hybrid)
Employment Type: Full-Time
Department: Engineering
Compensation: £50,000 + Equity

About Zenrox

Zenrox Healthcare UK is building an AI-powered marketplace that connects healthcare providers with MHRA-compliant medical equipment suppliers. Our flagship platform, ZenroxIQ, transforms procurement through intelligent supplier matching, automated compliance workflows, and predictive analytics—serving NHS trusts and private healthcare organisations across the UK.

The Opportunity

We are seeking a talented Full-Stack Developer to join as a Founding Engineer, playing a key role in designing, building, and scaling our marketplace platform.

This is a hands-on role offering end-to-end ownership across the technology stack—from crafting seamless user experiences to developing robust backend systems. You will work closely with the CTO to shape architecture, implement core features, and deliver a high-performance platform that drives efficiency in healthcare procurement.

Key Responsibilities

Platform Development

Develop, customise, and enhance a WordPress/WooCommerce-based marketplace platform
Build core features such as quote request systems, supplier matching, and order workflow management
Design and implement scalable backend services supporting marketplace operations

Frontend & User Experience

Develop responsive, high-quality user interfaces using modern JavaScript frameworks (e.g., React)
Optimise user experience across buyer and supplier journeys
Ensure cross-browser compatibility and mobile responsiveness

AI Integration & Innovation

Integrate AI-driven capabilities such as visual search and pricing optimisation into the platform
Collaborate on the implementation of intelligent features that enhance procurement decision-making

API & System Integration

Design, develop, and maintain RESTful APIs
Integrate third-party services including payment gateways, compliance verification systems, and analytics tools
Implement secure payment processing and escrow functionalities

Performance, Security & Compliance

Optimise platform performance, scalability, and reliability
Apply secure coding practices and ensure compliance with GDPR and data protection standards
Maintain high availability and system integrity

Collaboration & Technical Strategy

Work closely with the CTO on architecture, technical design, and system scalability
Contribute to technical decision-making, documentation, and engineering best practices
Participate in agile development processes and continuous improvement initiatives

Requirements

Minimum of 3+ years' experience in full-stack development
Strong proficiency in PHP with hands-on WordPress/WooCommerce development experience
Solid frontend development skills using JavaScript and frameworks such as React
Experience with database design and optimisation (MySQL or PostgreSQL)
Strong understanding of RESTful API design and integration
Knowledge of secure coding practices and data protection (GDPR)
Ability to work independently, take ownership, and make pragmatic technical decisions

Preferred / Advantageous Experience

Experience building marketplace or e-commerce platforms
Hands-on experience with payment gateway integrations (e.g., Stripe, PayPal)
Experience developing B2B or enterprise-grade software solutions
Familiarity with WooCommerce plugins (e.g., YITH or similar tools)
Exposure to healthcare or regulated industries
DevOps experience (e.g., AWS, Docker, CI/CD pipelines)

Why Join Zenrox

Founding engineering role with meaningful ownership and equity participation
Opportunity to build critical infrastructure for healthcare procurement
High level of autonomy to design and implement end-to-end solutions
Direct collaboration with a visionary founding team
Clear pathway to technical leadership roles as the company scales

How to Apply

Interested candidates should submit their:

CV
GitHub profile
Link to a relevant project (or a brief project description)

https://www.zenroxmed.co.uk/jobs/full-stack-developer/

Email Subject Line: Full-Stack Developer Application

Quick apply

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