PHP Developer

Cleeng; Polska; Remote; PLN 180,000 - 260,000; Full time

Benefits offered by this job

Flexible working hours

Remote-first environment

Sick leave

Job summary

Cleeng is seeking an experienced backend engineer to design, build, and maintain core platform features using PHP 8.4, Laminas Mezzio, and Doctrine. You will work AI-first, leveraging coding agents to implement, test, refactor, and navigate a large legacy codebase while upholding security and quality.

This role supports a remote-first, international team with a focus on scalable, reliable APIs. You will own features end-to-end, monitor dashboards, respond to incidents, and contribute to platform

Qualifications

• AI-first engineering experience with real coding agent workflows.
• Proficient PHP 8.x with strong OOP and SOLID design judgment.
• Experience with a mainstream PHP framework and Doctrine ORM.
• MySQL query optimization and REST API design with PHPUnit + TDD.
• Ability to operate independently in a remote-first, agile team.

Responsibilities

• Design, build, and maintain backend features in the Core Platform (PHP 8.4, Laminas Mezzio, Doctrine, MySQL) and expose them through REST APIs — with AI-first as the default approach.
• Work AI-first daily — use coding agents for implementation, tests, refactoring, and navigating legacy codebases.
• Improve agent context (docs, tests, tooling) to speed up shipping across squads.
• Own correctness, design quality, and security of merges; conduct strong code reviews.
• Launch features with dashboards and alerts, monitor health, and aid in incident triage with AI aids.
• Contribute to platform modernization through incremental refactoring and removing legacy components.
• Collaborate in a remote-first, international team through code reviews and design discussions.

Skills

AI-first coding

PHP 8.x

OOP & SOLID

REST API

TDD with PHPUnit

Legacy refactoring

Remote collaboration

Tools

Doctrine ORM

Job description

Founded in 2011, Cleeng is the Subscriber Retention Management® Company. Cleeng unifies the entire subscriber experience across web and mobile apps from a single platform, empowering D2C companies to simplify subscription management and maximize customer lifetime value.

Our award-winning Subscriber Retention Management (SRM®) suite delivers comprehensive solutions through an integrated approach - from flexible web payments and in-app subscriptions to sophisticated recurring billing and AI-powered customer support.

Trusted by industry leaders, including the NHL, Big Ten Network, The Weather Channel, TOD/BeIN, and NHK, Cleeng's complete suite helps businesses reduce churn and drive sustainable revenue growth across every channel.

Requirements

• AI-first engineering practice: daily, fluent use of AI coding assistants (Claude Code, Copilot, Cursor) to accelerate delivery — prompting effectively, reviewing generated code critically, and knowing when to accept, correct or reject it
• Proficient usage of modern PHP (8.x) with strong OOP and SOLID design judgement
• Ability to independently delivery in a mainstream PHP framework, with Doctrine or another ORM
• MySQL query optimisation
• Experience with REST API design and consumption, with automated testing in PHPUnit and a TDD mindset
• Confidence navigating and incrementally refactoring large legacy codebases, increasingly with AI assistance
• Ownership of features from ticket to production, with a quality and reliability mindset
• Clear written communication and autonomy in a remote-first, agile team

Responsibilities

• Design, build, and maintain backend features in our Core Platform (PHP 8.4, Laminas Mezzio, Doctrine, MySQL) and expose them through well-designed REST APIs — working AI-first, with coding agents as your default tool rather than an occasional shortcut.
• Work AI-first, every day — use AI coding agents for implementation, test generation, refactoring, and navigating unfamiliar parts of the legacy codebase. Learn what they're good and bad at, build the prompting and context habits that make them reliable, and share what works with the team.
• Raise the ceiling on what agents can do here — improve the context they work from (docs, conventions, tests, tooling, MCP servers, agent instructions) so the whole squad ships faster, not just you.
• Stay the engineer in the loop — you own correctness, design quality, and security of everything you merge, whoever or whatever wrote the first draft. Strong code review judgment matters more, not less, when volume goes up.
• Own what you ship — "you build it, you run it": launch features with dashboards and alerts, monitor them, and participate in the operational health of your squad's domain — using AI to speed up incident triage, log analysis, and root-cause work.
• Contribute to the modernisation of the platform: incremental refactoring, removal of legacy components, and the "leave it better than you found it" principle — using agents to make large-scale, low-risk changes that were previously too expensive to attempt.
• Investigate and resolve bugs and escalations in your domain, collaborating with QA on shift-left, AI-assisted test automation.
• Collaborate closely in a remote-first, international team: code reviews, design discussions, and PHP Guild alignment — including sharing AI workflows, prompts, and lessons learned across squads

Benefits

• Flexible working hours and form of employment;
• Possibility to work 100% remotely or in hybird model; depending on the geo location
• 100 % paid sick leave within the agreed limits;
• Events, celebrations