Senior Full-Stack Engineer (PHP/Laravel)

Location: Remote within Europe; preferred locations include the Czech Republic, Ukraine, Poland, and the UK. The role requires working remotely as an independent contractor.

Contract rate: Up to $60 USD/hour

Company

Build APIs and developer tools that help businesses integrate with creator and social platforms through consistent responses, webhooks, and SDKs.

What you will do

• Build and maintain production applications with PHP, Laravel, React, and Inertia.js.
• Investigate production incidents using logs, metrics, request flows, and queue behavior.
• Design reliable queues, workers, webhook-delivery systems, retries, and rate-limit handling.
• Develop and maintain integrations with external and undocumented APIs, including authentication and request-signing flows.
• Improve database queries, worker capacity, scheduling, backend performance, and customer data accuracy.
• Build dashboards, internal tools, automated tests, API documentation, SDKs, and developer tools aligned with production behavior.

Requirements

• Strong professional experience with PHP and Laravel in production applications.
• Practical React experience and the ability to deliver full-stack product features.
• Production experience with queues, workers, asynchronous jobs, or event-driven systems.
• Understanding of concurrency, retries, idempotency, duplicate execution, backpressure, and rate limiting.
• Strong API integration, production-debugging, incident analysis, and backend performance experience.
• Professional English communication and residence in Europe with availability to work remotely as an independent contractor.

Nice to have

• Experience reverse engineering undocumented APIs or web clients.
• Experience with proxy infrastructure, bot detection, request signing, cookies, or TLS fingerprints.
• Knowledge of OpenAPI, published SDKs, MCP tools, PostHog, or Inertia.js.
• Experience with creator platforms, social media APIs, security testing, or API abuse prevention.
• Strong personal projects, public code, open-source contributions, or independently launched products.

Culture & Benefits

• Small, highly autonomous, asynchronous engineering team.
• Weekly progress reviews with clear communication about decisions, blockers, and incidents.
• Production reliability and accurate customer data are prioritized.
• Working-hour overlap, incident coverage, response expectations, and on-call arrangements are discussed before an offer.
• AI development tools may be used during the practical debugging exercise.

Hiring process

• Complete a practical debugging exercise, typically requiring approximately six to seven hours including setup.
• Attend a 30-minute technical walkthrough covering the solution and technical decisions.
• Receive the final decision; the full process typically takes less than two weeks.