Back End Developer

Location: On-site (Merseyside) Employment Type: Full-time, Permanent

About Osdire

Osdire is a next-generation digital services freelancing marketplace currently under active development. The platform is being built to be scalable, secure, and user-centric, supporting high traffic volumes, complex workflows, and long-term growth.

Eligibility Criteria Applicants must have the legal right to work in the UK A valid UK residency status is required Visa sponsorship is not available

Role Overview

We are seeking an experienced Back-End Developer with strong Laravel and PHP expertise to play a key role in the development and scaling of our marketplace platform. You will be responsible for designing and building robust, secure, and high-performance backend systems that support core marketplace functionality and evolving business requirements.

Key ResponsibilitiesSystem Architecture & Development

Design and implement scalable, maintainable backend architecture Apply SOLID principles, clean code practices, and clear separation of concerns Develop modular components using service-layer and repository patterns

Core Platform Features

User authentication and role-based authorisation (Sanctum/Passport) Service listings (creation, editing, search, filtering) Order lifecycle and transaction management Secure payment integrations (Stripe, PayPal) Internal messaging, reviews, and dispute resolution RESTful API development with versioning support

Database & Performance Design and maintain efficient, well-structured database schemas Optimise SQL queries, indexing, and prevent N+1 issues Implement Redis for caching, sessions, and queue systems Monitor performance and address scalability concerns

Integrations & Collaboration Integrate third-party services such as payment providers and notifications Work closely with frontend developers (e.g. Vue.js) to ensure seamless API integration

Testing & Maintenance Write and maintain feature and unit tests (PHPUnit/Pest) Troubleshoot and resolve issues across development and production environments Support system stability and continuous improvement

Technical RequirementsCore Technologies PHP 8.2+ with strong OOP principles Laravel (v10–12) with 3+ years’ production experience Advanced SQL (MySQL/PostgreSQL), query optimisation, indexing Redis for caching, sessions, and queues

Architecture & Tooling Service-layer and repository patterns RESTful API design and authentication Event-driven architecture (Laravel Events & Listeners) Git, Composer, PHPUnit/Pest Code quality tools (PHP Insights, Pint/CS Fixer)

Performance & Testing Query optimisation and N+1 prevention Queue and memory optimisation TDD mindset and integration testing Understanding of code coverage.

Required

• E-commerce or marketplace platforms (3+ years)
• Multi-user role systems and permissions (Spatie or similar)
• Payment gateway integrations (Stripe, Braintree, PayPal)
• Order/transaction processing workflows
• File upload (S3)

Job Types: Full-time, Permanent

Benefits: Casual dress Company pension Sick pay Ability to commute/relocate: Liverpool L3: reliably commute or plan to relocate before starting work (required) Application question(s): Do you agree to work on site? Do you require sponsorship in the future? Please provide visa expiration date if applicable Work Location: In person