Oleksandr

Oleksandr Kapitula
Full stack developer
I am a self-taught full stack developer. Hard-working purposeful person. Good knowledge of Javascript and assisting tools. Solid team player.
My area of expertise includes eCommerce, Healthcare, FinTech, and SaaS domains. I prefer working on microservices architecture because I find it the most optimized
for business’ needs and because of its CI/CD configuration.
Besides hard skills, I always work on soft skills improvement so during the work I communicate clearly and what’s more important – effectively.

EXPERIENCE EDUCATION
Aug 2023 - Aug 2025 09/2007 – 06/2009
Back-end developer — Flexreality Specialist: Accounting And Auditing
Projects: Projects: Arbook
State University of Infrastructure And Technology – Kyiv
AR Book is an innovative, immersive educational platform designed to revolutionize science
education through AR and VR technologies. It empowers teachers and students with access to
interactive 3D experiments, virtual labs, and ready-made lessons across STEM disciplines. AR Book
09/2002 – 06/2007
connects learning with experience—simplifying complex concepts, enhancing engagement, and
making education more inclusive. Through its teacher dashboard, analytics tools, and gamified Engineer's Degree: Railway Transport Management
features, AR Book fosters meaningful interactions, efficient lesson planning, and measurable student State University of Infrastructure And Technology – Kyiv
progress. It is accessible, data-driven, and purpose-built to support modern education with
technology.
Technologies: Responsibilities: Extra curricular:
- TypeScript - Troubleshooting 2021
- Express(GraphQL & Rest) - New features execution
- PestgeSQL - Enhancements of the new functionality Graduated from the Binary Studio Academy -
- AWS (SNS, SQS, Lambda, - Lambda integrations https://study.binary-studio.com/public/99d3a339-5128-
OpenSearch) - Queues implementation 4c21-ad95-ab263d6281b3.
- AI (OpenAI, Mistrale) - Mixpanel intagration
- Redis - OpenSearch intagration
- BullMQ
- Socket.IO
- NodeJS - core
- GoogleApis (Drive, Sheet,
Slides)

Mar - Aug 2023
ACHIEVEMENTS
Full stack developer — CGS team
Projects: ShipServ | www.shipserv.com (Focus on BE) 2021
The ShipServ trading network is the most extensive, adopted and in-depth integrated online Binary Studio Academy https://study.binarystudio.
platform built for the Blue Economy.
ShipServ connects professional buyers and suppliers, simply and securely, to drive business com/certificate/99d3a339-5128-4c21-ad95-
opportunities and sustainable growth. ShipServ Trade interconnects buying and selling processes: it ab263d6281b3
is simple, secure and sustainable; it is transparent through smart data processes; it is accessible for
everyone, and it delivers efficiency and good, approved relationships at the same time. ShipServ
Trading ensures fair and open competition rewarding all parties with sustainable development. 2021
GeekBrains Frontend Developer
Technologies: Responsibilities:
- TypeScript - implementing SSO
- Redux - core - Troubleshooting
- Azure infra(azure funcs, - New features execution
service bus, etc…) - Enhancements of the new functionality
- Nest(GraphQL & Rest) - Writing tests
- Apollo Federation & Studio
- Auth0
- Mongo
- NodeJS - core
- ElasticSearch - core TECHNICAL EXPERTISE
- Kafka – JavaScript / TypeScript
– React Native
Aug 2022 - Mar 2023
– React (NextJS, Redux, React Query)
Back-end developer — CGS team
– NodeJS (ExpressJS & NestJS)
Projects: CapitalGain | capitalgain.com – Microservices
CapitalGain is stock trade marketplace which power the world’s leading crypto exchanges, NFT
creators, digital wallets, Alternative Trading Systems, RIA platforms, broker dealers, crowdfunding – GraphQL / Apollo client / Apollo Federation
platforms, and neobanks. – AWS Cognito/Amplify/Lambda/S3
– Firebase
Technologies: Responsibilities:
- TypeScript - Delivering new features – Google Cloud Platform / Google Cloud Functions
- Express - Slow performance Optimisation – Firestore
- NestJS - Performed a direct communication with a – Git / GitLab
- Mongo customer
– Azure (Service Bus, Azure Functions)
- Mongoose - Code-base optimisation
- Docker – ElasticSearch
- Prime Trust API (v2) – Kafka
– MQs(RabbitMQ, Bull)
Feb 2022 - Aug 2022 – WebSockets
React-native developer — CGS team – Databases: PostgreSQL/mySQL/MongoDB
Projects: Socol | www.socol.io – Swagger
This is the Blockchain DeFi system. Basically, the bridge between your web2 social channels and the – TypeORM
shiny new web3. But better. And easier.
– Auth0
Technologies: Responsibilities:
- Web3 - core - Built architecture
- DeFi - core - Troubleshooting
- TypeScript - Worked with API
- React - Implementing chat functionality
- React Native - Wrote tests
- NodeJS
- ExpressJS
- MongoDB LANGUAGES
- Docker
English (B2) | Ukrainian (Native) | Russian (Native)
Sep 2021 - Feb 2022
Frontend developer — Freelancer
Technologies:
React,
Formik,
Redux,
ApexCharts CONTACTS
Aug 2021 - Sep 2022 [відкрити контакти](див. вище в блоці «контактна інформація»)
Full stack JS developer — Binary-studio academy
Projects: Infostack [відкрити контакти](див. вище в блоці «контактна інформація»)
in
Infostack is a web-based application designed to store and organize the information that is a result 0b5116220
of teamwork. The solution also includes such features like notifications, follow pages, live page
editing, integration with GitHub repositories, etc.
Technologies:
- Node.js, Express.js
- Socket.io
- PostgreSQL, TypeORM
- GitHub Actions, Heroku
- Elasticsearch, Google API, GitHub API, Puppeteer
- React
- Redux
- TypeScript
- HTML
- SCSS
- Bootstrap

Dec 2016 - Oct 2019
Chief Engineer — JSC Ukrainian Railway

Mar 2014 - Dec 2016
Railway Safety Auditor— JSC Ukrainian Railway

Nov 2020 - Mar 2014
Shunting Dispatcher — JSC Ukrainian Railway