Middle Backend Developer (PHP)

Project

Chat is a multi-channel communication platform for support teams and operators: an omnichannel inbox (web widget, messengers, other sources), conversation routing and assignment, operator tooling, AI assistants for replies and automation, voice flows, statistics and reports, and integrations with external systems. A modular monolith built on clean architecture and DDD, with async flows via queues, realtime over websocket channels, and APIs for web clients and integrations.

Statistics - a separate analytics microservice for event collection and building statistics/reports, on Symfony under the FrankenPHP runtime with ClickHouse as the primary store.

Voice - separate Go microservices for voice flows.

Stack

• Backend: PHP 8.2+, Laravel and Symfony
• Databases: MongoDB, ClickHouse, Redis
• Async & realtime: Redis-based queues, websockets
• Auth: JWT, OAuth2
• Integrations: messengers, Google API, external webhooks, AI providers
• Infrastructure: Docker, Docker Compose, Nginx, S3 storage

Responsibilities

• Design and develop new functionality.
• Refactor and optimize existing code, technical-debt tasks.
• APIs for the UI and external services, integrations with external systems.
• Work with DB migrations, query optimization, design schemas for new domains.
• Take part in code review and technical discussions.

Expectations

• 2+ years of commercial PHP experience
• Confident OOP, common patterns, SOLID at an "apply it consciously" level, basic understanding of architectural principles and patterns
• Production experience with Laravel / Symfony / Yii
• Preferably experience with one of the NoSQL stores, or strong SQL with readiness to learn document-oriented specifics: indexes, schemas, aggregations
• Async flows: queues, background workers, idempotency
• HTTP, REST, basic understanding of realtime communication, integrations with external systems via API / webhooks
• Ability to decompose a feature into tasks and take it to production
• English - at least B1 (Intermediate): able to hold a basic conversation, ask questions, and explain your work

Nice to have

• Practical understanding and experience with DDD
• Experience with Go / TypeScript
• AI/LLM APIs: prompting, structured outputs, error handling and retries. LangGraph (TS) stack or experience with other agentic frameworks.
• Knowledge of and openness to AI dev tools, and the ability to use them

What we offer

• 8-hour working day
• Flexible schedule - within the team's overlap window you decide when to start and finish
• 20 paid vacation days per year
• 5 paid sick days per year
• National holidays off

Conditions

• Format: fully remote
• Employment: full-time
• Time zone: CET (Central European Time) or Europe/Kyiv
• Hiring process: CV → technical interview → short test task (optional) → final interview
• Probation: 2 months