# Vitalii Romaniuk **Full-stack software engineer** Valencia, Spain [LinkedIn](https://www.linkedin.com/in/vitalii-romaniuk-534b70103/) · [GitHub](https://github.com/Hitoki) · [ORCID](https://orcid.org/0009-0007-4729-7795) · [Email](mailto:kidomakai@gmail.com) ## Professional summary Full-stack software engineer with more than a decade of experience building and modernizing production web platforms. A background in automated electromechanical systems complements deep experience with Python backends and React-based JavaScript and TypeScript frontends, from established monoliths to service-oriented systems. Experienced in leading teams of up to 14 engineers, taking products from MVP to production, improving architecture and performance, and working directly with product stakeholders. ## Skills - **Languages:** Python · JavaScript · TypeScript · SQL - **Backend:** Django · Flask · FastAPI · GraphQL - **Frontend:** React · React Native · Vue · Angular · HTML · CSS - **Data & messaging:** PostgreSQL · MySQL · MongoDB · Redis · RabbitMQ - **Cloud & platform:** AWS · GCP · Hetzner · Linux · Git - **Game & native:** Godot · Unity · Swift · iOS ## Experience ### Full-stack software engineer **[Abby](https://www.abby.com/)** · Current A virtual receptionist service combining U.S.-based human receptionists and AI-powered call handling for businesses. Full-stack engineering across multiple production services, focused primarily on client-facing platform capabilities. - Build and maintain features across backend services and web applications. - Work across service boundaries to deliver and improve customer-facing product workflows. **Technologies:** Python · TypeScript · React ### Senior full-stack software engineer **[WasteHero](https://wastehero.io/)** · September 2025 – May 2026 · Aarhus / Herning, Denmark An AI-native operating system that unifies routes, fleet, tickets, billing, and self-service for municipalities and waste operators. Full-stack engineering across backend, web, and mobile applications, including the platform’s AI-driven second generation. - Contributed to multiple product initiatives, including WasteHero AI v2. - Presented product demonstrations and worked directly with stakeholders. - Delivered features across backend, web, and mobile applications. **Links:** [WasteHero AI v2](https://wastehero.io/) **Technologies:** Python · Django · React · React Native · TypeScript · GraphQL · Hetzner · Google Maps · OpenStreetMap ### Full-stack software engineer · UKEESS contractor **[SevenRooms / DoorDash](https://sevenrooms.com/)** · Remote A hospitality technology platform for reservations, CRM, guest experience, and marketing; part of DoorDash since 2025. Contracted through UKEESS Software House to work exclusively on the SevenRooms product. - Maintained and extended a production guest-experience platform. - Built and supported point-of-sale integrations. - Delivered product features and platform improvements across the stack. **Links:** [DoorDash](https://www.doordash.com/) · [UKEESS](https://ukeess.com/) **Technologies:** Python · Django · JavaScript · React · GCP · POS integrations ### Full-stack software engineer **[Emotive](https://emotive.io/)** · October 2021 – October 2022 · Remote An e-commerce SMS marketing platform for two-way messaging, campaign automation, segmentation, integrations, and revenue attribution. Full-stack engineering across the services and interfaces supporting merchant messaging and campaign workflows. - Worked across Flask microservices, a Django monolith, and React and Angular frontends. - Diagnosed product and architecture issues, translated them into actionable Jira work, and implemented solutions. - Improved database performance and system architecture while delivering new product capabilities. - Shared knowledge across the team and mentored engineers at different seniority levels. **Technologies:** Python · Flask · Django · JavaScript · React · Angular ### Full-stack engineering lead / software architect **[DDI Development](https://ddi-dev.com/)** · April 2018 – October 2021 · Kharkiv, Ukraine Software consultancy where I delivered multiple client products and led several project teams while combining architecture, engineering management, and hands-on full-stack development. - Delivered full-stack systems across multiple client projects and domains. - Designed scalable backend systems for high-concurrency workloads. - Improved application performance and guided architectural decisions. - Led and mentored multiple project teams, including a team of 11 engineers. ### Full-stack engineering lead / software architect **[WasteHero](https://wastehero.io/)** · April 2017 – June 2021 · Denmark An end-to-end operating platform for municipal and commercial waste management. Combined hands-on full-stack development with architecture, technical leadership, delivery, and stakeholder communication. - Helped take the product from MVP to production. - Led a growing engineering team ranging from two to 14 people. - Owned architecture and performance work, sprint delivery, product demonstrations, and stakeholder communication. **Technologies:** AWS · Python · Django · React · React Native · TypeScript · GraphQL · Google Maps · OpenStreetMap ### Full-stack software engineer **[AnvilEight](https://anvileight.com/)** · November 2014 – April 2018 · Kharkiv, Ukraine Full-stack engineering across multiple client products; notable projects included IEEE, Salesforce, and LiveChat. - Delivered production work across multiple projects, including IEEE, Salesforce, and LiveChat. - Built payment, email, and electronic-signature integrations and implemented core business logic. - Refactored legacy systems, improved performance, and added unit and integration test coverage. - Mentored other developers. **Links:** [IEEE](https://www.ieee.org/) · [Salesforce](https://www.salesforce.com/) · [LiveChat](https://www.livechat.com/) **Technologies:** Python · Django · JavaScript · PostgreSQL ## Education **Master’s degree in Automated Electromechanical Systems** National Technical University "Kharkiv Polytechnic Institute"