Senior Full-stack Dev/Project Lead

Senior Full-stack Dev/Project Lead (Python React) | Greenfield E-commerce Platform Miejsce pracy: Warszawa Technologies we use Expected Python React.js Next.js PostgreSQL FastAPI Rest API Optional AWS Redis About the project We are currently seeking a highly experienced Senior/Lead Full-stack Developer (Python React) who enjoys real ownership and can work independently in a greenfield environment. You'll join a compact, dedicated team building a brand-new ticket sales platform for a large Polish event agency. This is a full-time and fully remote engagement starting in January, planned for 4–6 months, with a strong chance of continuing long-term depending on the client's roadmap. Why this project is worth your attention: •100% greenfield - you'll help shape architecture and key decisions from day one •Real autonomy & decision-making - we want your ideas, not just execution •End-to-end product scope with visible business impact •Support from experienced Polcode's team: PDM, DevOps, QA, FE developer, plus CTO & Solutions Architect when needed. •Strong potential for long-term continuation - further product growth, scaling, new feature development and ongoing maintenance. Your responsibilities Build a multi-tenant ticketing e-commerce platform Co-own and shape the technical architecture, standards, and development approach Deliver core modules: stage creator (seats), events creation and management, user and organizer dashboard, payments flow and integration, tickets generation and distribution, admin tools Design and implement REST APIs and integrate frontend with backend services Lead technical direction for the small delivery team (mentoring, code reviews, best practices) Implement and oversee payment gateway, e-commerce and other external service integrations Ensure performance, scalability, and security suitable for large event traffic Collaborate closely with the Product Delivery Manager, other team members and client stakeholders Participate in estimations, planning, and defining milestones toward the first release Prepare and maintain technical documentation Our requirements Solid commercial experience as a Full-stack Developer Advanced knowledge of Python in web development (FastAPI preferred) Very good experience with React and Next.js Proven track record in building products from zero to release (greenfield) Good understanding of backend architecture, REST APIs, and integrations Hands-on experience with PostgreSQL Ability to work independently, take ownership, and proactively propose solutions Great communication skills and readiness to collaborate with the Polcode and client teams Comfort working in regular European business hours (approx. 8-16 / 9-17 CET) English at a level allowing smooth work with documentation and task descriptions Optional Experience with AWS / cloud environments and a DevOps-friendly mindset Familiarity with Redis, caching, queues, and session management Background in e-commerce or payment-heavy systems Experience with modular monolith / microservices-ready design Knowledge of security best practices (OAuth2/JWT, TLS/SSL, GDPR/RODO compliance) This is how we organize our work Team size 5 This is how we work at the client's site you focus on a single project at a time you develop the code "from scratch" agile scrum Team members frontend developer fullstack developer technical leader architect devOps automated test programmer product owner UI designer UX designer This is how we work on a project Clean Code code review Development opportunities we offer mentoring substantive support from technological leaders technical knowledge exchange within the company What we offer Multisport card, private medical care, life insurance, and meaningful gifts to celebrate important days All the necessary equipment for comfortable work Professional onboarding process We respect your private life - no overtime, no weekend jobs, work-life balance only, promise Work at times that suit your daily rhythm, from the place of your choice Your work is appreciated - we believe in the power of feedback, also the one you give us Benefits sharing the costs of sports activities private medical care sharing the costs of professional training & courses life insurance remote work opportunities flexible working time integration events Recruitment stages People Interview – short call/video call Skill Check – online test to verify core technical skills Technical & Business Final Interview TLDR: •100% remote work •0% nonsense We strongly believe that putting people first makes our work better. We encourage you to grow your career, contribute to open source, and follow your passion. We wanna do great things with you Sounds like a match? Let's talk If you'd like to know more or have any questions, reach out to Ela - she's always open for a quick chat. Polcode Sp. z o.o. Hi, Polcode here We're a global, people-first software house matching ambitious developers with challenging projects. Our team of over 100 professionals helps build and improve digital businesses, software platforms, eCommerce stores, websites, apps, and everything in between. And they're good at it. Your personal data controller is Polcode Sp. z o.o. with its registered seat in Warsaw (02-019), Poland, ul. Grójecka 1/3.Your personal data processed for the needs of recruitments are processed on the basis of your consent pursuant to article 6 clause 1 letter a) GDPR; Your personal data to the extent it is necessary to take the actions necessary to conclude an employment contract will be processed on the basis of article 6 clause 1 letter b) and c) GDPR. Polcode will process the data provided in your application: name, surname, date of birth, citizenship, correspondence address, contact data, education, and employment history.Polcode is entitled to process your personal data on the Article 221 of The Polish Labour Code and the Act on Foreigners from 12 December 2013.In some cases, we are obliged by law to share your data with external parties. To comply with our regulatory obligations, we may disclose data to the relevant government, supervisory or judicial authorities.Your personal data will be stored as long as needed for the recruitment process and after that, for the duration required by the law and the companys legitimate interest. After this time, your personal data (CV) will be automatically deleted from our database, unless your personal data is necessary for the purpose of pursuing and enforcing claims or defending against possible claims - in which case your data will not be stored longer than until the dispute is resolved or the expiry of the limitation period, unless we have any other basis for their storage. If you consent to participation in other recruitments, your personal data will be stored for a period not longer than 2 years or until you withdraw your consent.You are entitled to access, rectify, erase your data, limit it processing and to object the processing of your personal data.You can withdraw your consent at any time. Withdrawal of consent does not affect the lawfulness of the processing which was carried out based on your consent before its withdrawal.You have the right to lodge a complaint to the President of the Polish Office of Data Protection Prezesa Urzędu Ochrony Danych Osobowych. Providing your personal data is voluntary, however, refusal to provide data will result in your candidacy being omitted in the recruitment procedure.Your data will not be used for automated decision making.