---
title: "Senior Fullstack Engineer… at X-FLOW – Warsaw, Poland"
canonical: "https://www.metaintro.com/job/senior-fullstack-engineer-php-typescript-at-x-flow-d3f77820-89bb-52ce-b95d-8e787cab4927"
language: "en"
author: "Metaintro"
---

[/company/x-flow](/company/x-flow)[X-FLOW](/company/x-flow)
# Senior Fullstack Engineer (PHP/Typescript) at X-FLOW

Department: Happy ColorSeniority in posting: Experienced

LanguageEnglish
Polski

**Setup**
: On-site

**Location**
: Warsaw, Masovian Voivodeship

**Type**
: Full-time

**Level**
: senior

**Posted**
: May 28, 2026

## Description

X-FLOW is hiring a Senior Fullstack Engineer for its flagship mobile game project, Happy Color. The role involves designing and developing RESTful APIs with PHP/Laravel, building frontend applications with TypeScript/React, integrating external services, optimizing performance, designing databases, writing tests, conducting code reviews, and contributing to architecture and observability. The position requires at least four years of experience with PHP and Laravel, TypeScript and React, database and message-queue technologies, security practices, and software-design methodologies, and offers remote or office work options.

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