Senior Full-Stack Engineer

We are evolving an existing legacy Laravel + MySQL system into a modern, scalable, multi-tenant healthcare SaaS platform called Open Arogya.

The legacy system is functional but requires:

• Architectural refinement
• Codebase restructuring
• Workflow redesign
• Performance improvements
• Security hardening
• Multi-tenant transformation
• API-first modernisation

This is not a greenfield build.

This role is for a strong, independent Senior Full-Stack Engineer (minimum 4 years experience) who can:

• Audit and understand an existing codebase
• Refactor and modernise without breaking production stability
• Evolve the system into a scalable SaaS architecture
• Use AI tools such as Claude Code, Cursor, GitHub Copilot (or similar) to accelerate structured development
• Take full technical ownership of transformation

Current System Overview

• Backend: Laravel (Legacy versions partially upgraded)
• Database: MySQL
• Monolithic structure
• Limited modular separation
• Workflow-heavy logic
• Growing integration requirements (Stripe, Twilio, WhatsApp, Agora, etc.)

The goal is to transform this into:

• Clean modular architecture
• Multi-tenant SaaS model
• API-first backend
• Production-grade deployment model
• Scalable and maintainable platform, 1️ Legacy System Audit & Modernisation
• Review and understand the current Laravel codebase
• Identify architectural weaknesses and technical debt
• Refactor legacy patterns into maintainable modular design
• Improve database structure where necessary
• Reduce coupling and improve separation of concerns
• Optimise performance and query efficiency (MySQL)

You must be comfortable working inside imperfect code and improving it.

2️ SaaS Multi-Tenant Transformation

• Design and implement multi-tenant architecture
• Ensure tenant data isolation
• Implement scalable API structures
• Introduce proper role and permission systems
• Improve state and workflow management logic

Experience designing SaaS platforms is strongly preferred., * Using AI for structured refactoring

• Accelerating boilerplate and documentation
• Generating and validating test cases
• Improving developer velocity without compromising quality
• Designing prompt-driven development workflows

We expect intelligent use of AI - not blind dependency.

4️ Full-Stack Development (Hands-On)

Backend:

• Laravel (core focus)
• API design and implementation

Frontend:

• React (or modern frontend framework)
• Integration with backend APIs

Database:

• MySQL schema optimisation
• Query tuning
• Migration planning

5️ Integration & Infrastructure Improvement

Integrations include:

• Stripe Connect
• Twilio (SMS, OTP, Voice)
• Meta WhatsApp Cloud API
• Agora Video API
• Social media APIs

You will:

• Improve integration architecture
• Standardise API structures
• Ensure webhook reliability
• Improve error handling and logging

6️ DevOps & Release Management

• Work with CI/CD pipelines
• Manage release cycles
• Ensure environment separation (dev/staging/prod)
• Improve deployment reliability
• Maintain version control discipline (GitHub)

Cloud fundamentals (AWS/Azure/GCP) required.

Do you have experience in SaaS?, You must have hands-on experience using AI coding tools such as:

• Claude Code
• GitHub Copilot
• Cursor
• Codeium
• Similar AI coding agents, * Minimum 4 years full-stack experience
• Strong Laravel experience (must)
• Strong MySQL database understanding
• Experience refactoring legacy systems
• Experience working with SaaS platforms
• AI-assisted development experience
• Experience with APIs and integrations
• Ability to work independently
• Strong architectural thinking

Strongly Desirable

• Healthcare or regulated environment experience
• Multi-tenant SaaS experience
• Experience working with external vendors
• Experience modernising monolithic systems
• Familiarity with event-driven or service-based architecture, * Comfortable working in imperfect legacy systems
• Structured and disciplined
• Technically opinionated but pragmatic
• Independent and accountable
• Focused on delivering production-ready software
• Capable of balancing speed and safety

Senior Full-Stack Engineer - Legacy System Modernisation (Laravel/MySQL) to Healthcare SaaS Platform (Open Arogya) (Product Ownership | System Modernisation | AI-Driven Development | Independent Technical Leadership) Open Arogya is not just an internal system upgrade. It will be launched as a new standalone SaaS startup company, initially funded by Manchester Private Hospital as seed capital. The objective is to: * Successfully modernise and stabilise the current legacy platform * Launch Open Arogya as a production-ready healthcare SaaS product * Pilot within Manchester Private Hospital * Then scale and commercialise to the wider UK healthcare market This role is therefore more than a senior engineering position. You will play a foundational role in building the technical backbone of a healthcare technology startup from the ground up.