Mid/Senior PHP Developer | Warehouse Management System (WMS)

LOCATION Primary Location: Vilnius, Lithuania THE OPPORTUNITY The Boozt platform team is best characterized by its flat structure, friendly and collaborative atmosphere, and a reputation for solving highly complex problems with simple, elegant technical solutions. Overengineering is something we actively avoid. We work in small, cross-functional teams of up to five (or max six) developers, within a broader platform community of 176 developers across 5 locations. Our Warehouse Management System (WMS) is developed fully in-house, giving us complete control over our engineering priorities, architectural design, and roadmap. Using agile methods and maintaining direct contact with end-users - our colleagues working inside our own fulfillment center - we continuously improve the system and ship features to production multiple times per day. The Vilnius team’s core responsibility is orchestrating the technical backbone of the largest AutoStore installation in the world, managing ~1,200 active robots operating across more than 1,200,000 bins. A key focus area is our cube-consolidation architecture (Transfer Cells): our fulfillment center is organized around three massive AutoStore cubes connected via automated conveyor belts. By automatically routing bins between cubes via Transfer Cells, we streamline order consolidation and eliminate manual intervention. TECH STACK Languages & Frameworks: PHP (Symfony framework) and Go.Data & Messaging: MySQL, MongoDB, Redis, and Elasticsearch. Cross-system communication relies on Google Pub/Sub, RabbitMQ, and standard REST APIs.Infrastructure & Support: 100% Google Cloud Platform (GCP) managed via Terraform—no manual ad-hoc infrastructure changes. While we own our infrastructure, dedicated internal SRE and DevOps teams are always available to collaborate.Observability: Datadog for centralized logging, APM metrics, health monitoring, and tracking real-time performance impact during deployments.AI Tooling: We actively leverage AI developer tools (Claude Code, Gemini, Codex, etc.) to accelerate coding, debugging, and research. We embrace modern workflow tools to eliminate friction and focus our time on solving complex logic problems. What You Will Do Model and optimize core logistics algorithms, tackling mathematical and optimization challenges across processes like putaway, picking, sorting, and returns.Integrate software services with advanced warehouse automation hardware (including robotic cubes, robot arms, conveyor networks, and Transfer Cells).Work directly with Logistics Product Managers and Warehouse Process teams to design, test, and ship real-time system improvements. YOUR PROFILE At least 4 years of professional experience in backend PHP development.Strong hands-on experience with the Symfony framework.Strong analytical mindset with an interest in solving algorithmic, mathematical, or logic optimization problems.Open to and enthusiastic about using AI coding tools to optimize daily engineering workflows.Fluent in English, our corporate language (only applications written in English will be considered). BONUS POINTS Experience with Go, GCP, or OPC UA.Prior background or experience with WMS / WCS development. Boozt perks +5 vacation days, Health insurance, and Office bikes. Scandinavian workplace culture. Focusing on work-life balance. International team. Multicultural colleagues, cross-functional teams, and daily English communication with a good sense of humor. Generous staff discount. Salary: 4500-5500 Eur gross Apply today – we’re excited to learn more about you! Only applications submitted in English will be considered. Important: Applicants must have the legal right to work in Lithuania at the time of employment. Please note that this position does not include visa sponsorship or relocation support. We review applications on an ongoing basis. You can read more about the process under Recruitment. A LITTLE BIT ABOUT US We are one of the leading e-commerce players in the Nordics. We offer our customers fashion, kids, sports, beauty, and home on Boozt.com and Booztlet.com. Headquartered in Copenhagen, with over 1,100 colleagues across Europe, tech hubs in Vilnius and Poznań, and a fully automated warehouse in Ängelholm, we create value for both consumers and brands while fostering diversity, inclusion, and innovation.