Senior Full Stack Developer (PHP and React.js)

Job Summary

We are seeking a highly experienced Full-Stack Developer with 9+ years of production systems experience. The ideal candidate will have expertise in embedding AI across the full SDLC, implementing Spec-Driven Development, and possessing strong skills in PHP (custom MVC, CMS, Laravel) and React/TypeScript. Experience with multi-tenant SaaS, microservices architecture, and data migration (MS SQL / MySQL) is essential. Strong communication and ownership skills are also key.

Key Responsibilities

• Embed AI across the SDLC: use MCP servers, custom Tools, and create reusable Skills to connect agents to internal systems (databases, APIs, CMS, legacy services), and orchestrate a multi-agent pipeline — requirements through deploy — with structured handoffs.
• Wire in and govern agents: integrate AI Hooks into pre-commit, push, and PR events, with read-only production access and sandboxed agent operations.
• Work spec-first (SDD): write Feature Specs before code, with agent-assisted reviews and human approvals at each of the four gates and decision rationale kept as artifacts.
• Build the back end: work in a custom PHP MVC framework, CMS, and Laravel; design versioned, tenant-scoped REST APIs.
• Develop SaaS-first: tenant isolation, per-tenant configuration, subscription and entitlement logic, and scalable, cached, stateless services.
• Evolve the architecture and data layer: extract microservices from the monolith by domain ownership without disrupting production, and migrate schemas (MS SQL / MySQL) into multi-tenant data models that hold up at scale.
• Modernise the front end and own quality: migrate legacy AngularJS to typed React (Ant Design); ship through peer-reviewed PRs, CI (GitHub Actions, Snyk), and agent-generated, human-verified tests, with security fundamentals as standard.

Requirements

• 9+ years full-stack development on production systems.
• AI across the full SDLC - uses MCP servers and has authored Tools, Skills, and AI Hooks and run a multi-agent pipeline; treats AI as embedded infrastructure, not autocomplete alone.
• Spec-Driven Development - works spec-first within a gated review process.
• Strong PHP (custom MVC, CMS, Laravel) and React / TypeScript.
• Multi-tenant SaaS and microservices - service extraction from a monolith, plus schema migration and multi-tenant data models (MS SQL / MySQL).
• Communication and ownership - strong communicator and team player with project and client-handling skills, who takes ownership of their work.