Sergey I.
Description
Sergey is a Senior Full-Stack Developer with over 13 years of experience delivering high-impact solutions across construction, healthcare, streaming, and retail. He has led development and architecture for complex systems, improved operational efficiency through system optimizations, integrated enterprise platforms, and mentored teams to elevate code quality. A proactive problem-solver, who excels at translating business requirements into reliable, scalable solutions in both startup and corporate environments.
Work history
Developed a greenfield crisis case management platform designed to support real-time psychologist assignment and improve regional crisis response operations. Built backend services and APIs for case handling, assignment logic, and regional coordination, while also implementing React-based frontend features to support real-time workflows, operational visibility, and user interaction. Helped replace manual, fragmented processes with end-to-end digital workflows spanning frontend, backend, and system integrations. Contributed to platform architecture and participated in feature design discussions to ensure alignment with operational needs and scalability requirements.
KPlan - A document management system for construction companies. Sergey's main responsibilities are to Support the solution, fixing bugs and add features like reports, user management and query optimization. Upgrading to .NET Core and Entity Framework. Primavard - Network of clinics and pregnancy monitoring centers in Sweden. He supports and improves the static sites generated from Contentful CMS using Gatsby. Cloetta - Planning and order management systems for confectionery planograms. What he does there is support and improve the systems, fixing bugs and investigating issues. He also implemented an integration with SAP and M3 systems within Cloetta's project WebOrder.
Stockholm Stream is a startup started in 2018. Stockholm Stream offers a full self-service solution of content management using their own developed platform Delta. This includes support for: rights, metadata, images, subtitles and video files to support the streaming industry around the world. Sergey worked as a lead developer and architecture consultant. He implemented backend, APIs and main modules, participated in frontend development, migrated frontend app to TypeScript. Sergey has 1 year of mentor experience with code review.
Hollistay is an ambitious startup aiming to be the biggest camping's booking system in Nordic countries. At the moment the database includes more than 2000 campings in Sweden, Norway, Denmark, Netherlands and Finland, everyday new campings are joining Hollistay system.
Scheduler is an internal corporative website for planning merchandisers visits to stores in various regions. The team created the system for forming schedules for 200+ merchandisers and 2000+ stores. The Scheduler includes a convenient UI for managers and XLS reports functionality for better analysis.
Sol-IQ is a mobile puzzle game. Sergey created the back-end with the API for phones and administrator console with the possibility to manage the content.
Implementation of a new design for Percepium i Lund AB for a learning management system. Implemented design for mobile and desktop devices.
Ascom web portal was created for monitoring product license usage. Sergey created a prototype for license usage report.
BARIUM LIVE is a Cloud Business Process Management System.
ASUTP is a system for controlling well drilling. A friendly web interface provides online data transferred from a wellbore to widgets, charts, and table views.
Drilling scheduler is a WinForms 3-tier application which is used for planning time and cost of drilling with the possibility to compare planned and actual values.
Stockholm Stream is a startup started in 2018. Stockholm Stream offers a full self service solution of content management using their own developed platform Delta. This includes support for: rights, metadata, images, subtitles and video files to support the streaming industry around the world. Sergey worked as a lead developer and architecture consultant. Implemented backend, APIs and main modules, participated in frontend development, migrated frontend app to TypeScript. Has 1 year of mentor experience with code review.
Work history
Developed a greenfield crisis case management platform designed to support real-time psychologist assignment and improve regional crisis response operations. Built backend services and APIs for case handling, assignment logic, and regional coordination, while also implementing React-based frontend features to support real-time workflows, operational visibility, and user interaction. Helped replace manual, fragmented processes with end-to-end digital workflows spanning frontend, backend, and system integrations. Contributed to platform architecture and participated in feature design discussions to ensure alignment with operational needs and scalability requirements.
KPlan - A document management system for construction companies. Sergey's main responsibilities are to Support the solution, fixing bugs and add features like reports, user management and query optimization. Upgrading to .NET Core and Entity Framework. Primavard - Network of clinics and pregnancy monitoring centers in Sweden. He supports and improves the static sites generated from Contentful CMS using Gatsby. Cloetta - Planning and order management systems for confectionery planograms. What he does there is support and improve the systems, fixing bugs and investigating issues. He also implemented an integration with SAP and M3 systems within Cloetta's project WebOrder.
Stockholm Stream is a startup started in 2018. Stockholm Stream offers a full self-service solution of content management using their own developed platform Delta. This includes support for: rights, metadata, images, subtitles and video files to support the streaming industry around the world. Sergey worked as a lead developer and architecture consultant. He implemented backend, APIs and main modules, participated in frontend development, migrated frontend app to TypeScript. Sergey has 1 year of mentor experience with code review.
Hollistay is an ambitious startup aiming to be the biggest camping's booking system in Nordic countries. At the moment the database includes more than 2000 campings in Sweden, Norway, Denmark, Netherlands and Finland, everyday new campings are joining Hollistay system.
Scheduler is an internal corporative website for planning merchandisers visits to stores in various regions. The team created the system for forming schedules for 200+ merchandisers and 2000+ stores. The Scheduler includes a convenient UI for managers and XLS reports functionality for better analysis.
Sol-IQ is a mobile puzzle game. Sergey created the back-end with the API for phones and administrator console with the possibility to manage the content.
Implementation of a new design for Percepium i Lund AB for a learning management system. Implemented design for mobile and desktop devices.
Ascom web portal was created for monitoring product license usage. Sergey created a prototype for license usage report.
BARIUM LIVE is a Cloud Business Process Management System.
ASUTP is a system for controlling well drilling. A friendly web interface provides online data transferred from a wellbore to widgets, charts, and table views.
Drilling scheduler is a WinForms 3-tier application which is used for planning time and cost of drilling with the possibility to compare planned and actual values.
Stockholm Stream is a startup started in 2018. Stockholm Stream offers a full self service solution of content management using their own developed platform Delta. This includes support for: rights, metadata, images, subtitles and video files to support the streaming industry around the world. Sergey worked as a lead developer and architecture consultant. Implemented backend, APIs and main modules, participated in frontend development, migrated frontend app to TypeScript. Has 1 year of mentor experience with code review.
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