Sergiy Savostin

Sergiy Savostin

Principal-level Full Stack Engineer

London, UK.

About

Principal Full Stack Engineer with 20+ years of experience building scalable, cloud-native platforms and leading high-performing teams. Deep expertise in AWS architecture, TypeScript/Node.js/React, and microservices. I drive greenfield product delivery, mentor engineers, and align technology decisions with business outcomes in fast-paced environments.

Work

Total Performance Data

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Software and Web Apps Director

London, London, United Kingdom

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Highlights

Spearheading architectural transition to AWS, introducing scalable microservices and event- driven patterns.

Led modernization of legacy systems by implementing JSON and WebSocket APIs for real-time data processing.

Designed and delivered new services including real-time tracking software and analytical tools for racing telemetry.

Delivered end-to-end automation of post-race infographics pipeline across backend, rendering, and on-site display.

WellDone Creative Software

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Full-stack Developer

London, United Kingdom

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Highlights

Developing and managing corporate websites and web applications (PHP, MySQL, HTML, JavaScript, CSS, D3.js).

Developing a Windows VPS hosting service, including a billing system and a management console (Proxmox, KVM, Powershell, PHP).

Designing and managing a 1Tb+ statistical data service (MySQL, Clickhouse, PHP, D3.js, Node.js, API).

Developing native libraries for the company's software products (C/C++, SQLite, OpenSSL).

Developing desktop betting software (Qt/C++, OpenSSL)

Integration of the company's products and apps with third-party services, platforms, and APIs: Stipe, PayPal, SMS gateway, mass mail; ticket system; CRM, MODx, SMF, Cloudflare, several APIs (JSON, XML/SOAP, REST).

Team Creation

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Senior Full-stack Developer

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Highlights

Decomposed monolithic Laravel application into microservices with Docker and CI/CD pipelines across dev, QA, and production.

Authored comprehensive API documentation and test suites to improve developer onboarding and reduce regressions.

Kits Telecom ISP

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Head of Internet Services

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Summary

Supervised a team of systems engineers and network administrators in the rolling out of a new cable Internet service provider. The company was later acquired by a national ISP.

Market ISP

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Head of Web Development

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Summary

Managed a team of web developers and designers working on commercial websites.

Marka ISP

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Senior Full Stack Developer

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Summary

Started as a junior Full Stack developer and was promoted to the senior position. Building business presentation websites, online stores, e-commerce websites, chats.

Education

Zaporizlzhian National Technical University

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Bachelor degree Electronics design engineer

Languages

English

Russian

Ukrainian

Skills

Programming Languages

TypeScript, JavaScript, Node.js, C/C++, Go, SQL, Bash.

Frameworks and web components

React, Bun, jQuery, D3.js, Axios, Charts.js, Highcharts.js, Wordpress.

Databases

MySQL / MariaDB, SQLite, Clickhouse.

Operating Systems

Linux, Windows, MacOS.

Architectures

Microservices, Event-driven, Client-Server, Serverless.

Cloud, virtualisation and monitoring

AWS, Proxmox, Virtualbox, Docker, Prometheus, Grafana.

APIs

REST, SOAP, OpenAPI, JSON, Websockets.

Tools

Jenkins, Jira, Git, Bitbucket.

Product, architecture and database ownership

Graphics Editors

Adobe Photoshop, Adobe Illustrator, Sketch.

Projects

Share Graphs for BetFair (internal back-office for Flutter Entertainment)

BetFair historical data analysis tool

BetFair historical data plugin backend and libs

MarketLocator - Betting desktop (MacOS, Windows) software

Developing projects architecture, number of *nix servers installations and full administration (Nginx, MySQL, Bash, PHP, Perl, Powershell, Javascript)

BetFair Gameday Pie

BetFair graphs aggregator

Windows VPS hosting