Senior PHP Software Engineer

About us:We are an e-commerce platform and a network of travel agencies offering a wide range of travel products. Since 2015, we have been part of Wirtualna Polska Holding – Poland’s largest group of media and e-commerce companies. Together with Travelplanet.pl and the Invia brands across CEE, we are building a unified travel group driven by a shared #TravelMindset. In our daily work, we #Explore better ways to grow, #Engage through real ownership and teamwork, and #Enjoy building experiences that people genuinely look forward to. Send us your CV and… see you at Invia CEE x Travelplanet.pl x Wakacje.pl! ✈️ Team/Project/ProductThis role sits within a team responsible for designing and evolving the architecture of core backend services that power the product's e-commerce and platform capabilities. The team owns the technical direction of key service areas, ensuring solutions are scalable, maintainable, and aligned with the broader system architecture. Working closely with the Team Lead and area Architect, this position contributes directly to shaping how services are built and integrated, ensuring technical decisions support both immediate feature delivery and the long-term health of the platform. The role plays a key part in bridging hands-on development with architectural planning, helping the team avoid both technical debt and unnecessary complexity.Key Responsibilities:Support the Team Lead in designing the architecture of services and broader technical solutions, collaborating closely on planning and roadmap decisionsConsult with the area Architect to ensure proposed solutions align with overall system architecture and standardsLead regular mentoring sessions with developers, supporting their technical growth and code qualityEvaluate architectural options critically, selecting solutions that fit actual business and technical needs while avoiding over-engineeringDesign and maintain REST APIs and event-driven/queue-based integrations across servicesEnsure code quality and reliability through unit and integration testing (PHPUnit) and active participation in code reviewsRequirements:7+ years of experience with PHP 7.x/8.xProficiency in a major PHP framework — multi-framework environment (Symfony, Laravel, Slim); minimum 3–4 years of production experience with at least one, with working knowledge of the others and the ability to move between frameworks comfortablyHands-on experience with REST API design and developmentExperience writing automated tests with PHPUnit (unit and integration testing)Familiarity with the Linux command line (basic level required)Strong understanding of relational databases and SQL (PostgreSQL) — schema design, query optimization, indexing, transactionsNoSQL / caching technologies (Redis, Elasticsearch) — working levelGit / GitHub (pull requests, code review), DockerOOP, SOLID principles, design patternsSound architectural judgment — ability to select solutions appropriate to actual needs and avoid over-engineering (key aspect of this role)Event-driven architecture / message queuesEnglish proficiency at a B2+ level (communicative)Soft Skills (Required)Strong communication — able to clearly explain and justify technical decisions to the Team Lead and the wider teamAnalytical thinking, problem-solving, and the ability to weigh trade-offsCollaboration and mentoring — planning with the Team Lead and leading regular development sessionsNice to Have / Willingness to LearnHands-on experience with Docker and ElasticsearchExperience with message brokers like RabbitMQKnowledge of visualization tools like Kibana or GrafanaContributing to CI/CD pipelinesAn additional programming language (Go, Python, JS/TS)SEO in e-commerce contextWhat do we offer:Workplace safety and comfort:Employment based on an employment contract or B2B,Full support during the onboarding period under the supervision of an engaging leader/buddy.Business agency and agility:Real influence on business decisions, the ability to take initiatives and implement your ideas.Development within the organization:Individual Development Plan,Participation in training courses and conferences to enhance professional competencies.All-inclusive for Employees:A benefits package that you can use according to your preferences – Lux Med medical care, Health and Life Insurance (PZU and Warta), Multisport card, shopping and lunch vouchers, and many other cafeteria offers available on the Worksmile platform,Study Tour – trips abroad to explore our product offerings (destination tours and hotel audits),A training and webinar package supporting professional and personal development,Discounts on our products for employees and their families,Possible to work from one of our office in Gdańsk (Alchemia office complex), Wrocław (Legnicka Business Garden), Warsaw (Włochy Business Garden) or remote. Casual dress code.Ready to join the team with a #travelmindset? We’re waiting for you!