Sr Backend Engineer ( API )

Senior Backend Engineer (API) | Careers | DuskByte Senior Backend Engineer: API Modernisation (Symfony/Laravel)

Legacy Refactoring, API Design (REST/GraphQL), Database Optimization. Remote / Hybrid Full-Time

The Mission

In the world of Enterprise SaaS, the Backend is where the battle for stability is won or lost. At DuskByte, we specialize in taking 10-year-old PHP monoliths and transforming them into high-performance, modular engines. As a Senior Backend Engineer, you will use your decade of experience to decouple spaghetti code, modernise database schemas, and build the APIs that power the next generation of our clients platforms.

What You Will Do (The Role)

Monolith Decoupling

Lead the strategic refactoring of massive Symfony or Laravel applications into clean, service-oriented architectures.

API Modernisation

Design and implement robust, versioned RESTful or GraphQL APIs to replace aging, undocumented internal endpoints.

Database Hardening

Audit and optimize complex SQL (PostgreSQL/MySQL) environments, fixing N+1 queries, poor indexing, and data integrity issues.

The Strangler Strategy

Build the middleware and wrappers necessary to transition legacy business logic to modern services without breaking front-end functionality.

Performance Engineering

Implement advanced caching strategies (Redis/Memcached) and asynchronous processing (RabbitMQ/SQS) to stabilize high-traffic B2B platforms.

You are a master of the PHP ecosystem and its infrastructure

The Frameworks

Deep, expert-level knowledge of Symfony (5.x/6.x) and Laravel (9.x/10.x/11.x).

The Language

Mastery of modern PHP 8.x features (Attributes, JIT, Fiber) and how to upgrade legacy 5.x/7.x codebases safely.

Expert SQL optimization and experience with ORMs (Eloquent/Doctrine) vs. raw, high-performance queries.

Strong grasp of Design Patterns (Solid, Repository, Factory) and Domain-Driven Design (DDD).

Comfort with Docker, Linux environments, and CI/CD pipelines.

Who You Are (Requirements)

10+ Years of Experience

You ve lived through the evolution of the web. You know why certain architectural decisions were made in 2014 and why they need to change in 2026.

The Spaghetti Specialist

You don t get frustrated by messy code; you see it as a puzzle. You have the patience and discipline to refactor safely.

Documentation-First

You believe that an API is only as good as its documentation (Swagger/OpenAPI).

Mentor Mindset

You enjoy sharing your Battle Scars with mid-level engineers to help them avoid the mistakes of the past.

Why This Role is Critical at Duskbyte

You are the Foundation Specialist. While others focus on the cloud or the UI, you ensure the core business logic is indestructible. You are the one who turns a Slow, Buggy Legacy App into a Fast, Reliable Enterprise Engine.

Tell us about your experience relevant to the Senior Backend Engineer: API Modernisation (Symfony/Laravel) role.

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