English:
Upper Intermediate
Ukraine
UTC +02:00
Ukraine/Kyiv
Lead Full-stack Developer: Backend, CTO, & DevOps - deliver top-notch IT solutions, guiding your ideas from conception to a fully operational business
- Lead Full-stack engineer with over 9 years of commercial experience, specialising in backend/front-end development and DevOps, with a proven track record in Solution Architecture. - Have experience with HIPAA, SOC2, and High Trust compliance. - Proficient in JavaScript stack: Node.js, Express, React, Postgres and TypeORM - Created a system that analyzes healthcare data to improve service delivery in the U.S. health sector. - Upgraded an SMS service to handle millions of messages more securely and efficiently. - Led the development of an app for women entrepreneurs in various creative industries. - Created a service for uploading and managing large quantities of images.
Want to hire this engineer?
Check if Kostya is availableExpertise
Years of commercial development experience
9 years of experience
Core technologies
Other technologies
Project Highlights
Moji
The application for creating, distributing, and watching video files about restaurants in TikTok style.
Responsibilities & achievements
‣ Developing a full-fledged solution from scratch; ‣ Organising repositories, deploy flow, develop flow, environments, versioning; ‣ Deploy and configuration infrastructure; ‣ Deploy and maintain backend.
AllClinics
AI driven HealthCare data analytics platform. The platform provides data reports, data analysis for US health care market.
Responsibilities & achievements
‣ I have developed a robust solution to stream the data from Postgres to big query on top of Kafka deployed in kubernetes. ‣ Developing solution; ‣ Designing database; ‣ Designing API; ‣ Writing API endpoints; ‣ Developing features.
OpenCulture
Recruitment platform for hiring candidates for the existing job and team
Responsibilities & achievements
I was in charge of the entire solution for the recruitment platform, which encompassed the development of infrastructure on AWS. This infrastructure consisted of S3 buckets, image and video processing Lambdas, a database, and an auto-scaling solution implemented using ECS and a load balancer. Once I had developed the initial solution, I handed over the development responsibilities to intermediate developers. They were responsible for implementing new functionalities. From that point forward, my role shifted to providing consultation and contributing to minor feature developments.
Picflow
Developed scalable service which handles uploading terabytes of images. Service where you can uploadand store terabytes of your images
Responsibilities & achievements
‣ Developing solution; ‣ Designing database; ‣ Designing API; ‣ Writing API endpoints; ‣ Developing features. Infrastructure: AWS ECS in horizontal scalable mode, AWS Lambda, AWS ApiGateway, AWS S3, AWS Secret manager, Postgres on AWS RDS, Redis, Kafka on AWS MSK, Customer.io, Auth0.
SmarterContact
Development of the SMS platform which sends millions SMS per month.
Responsibilities & achievements
‣ Transferred a lot of microservices deployed on one instance to Kubernetes with secure approach to handle highloading; ‣ Developing solution; ‣ Designing database; ‣ Designing API; ‣ Writing API endpoints; ‣ Developing features.
HealthPlate
Healthcare app that's building a healthier world. Most of specification under NDA.
Responsibilities & achievements
‣ Developed secure and highloading application based on Kubernetes and following various complaints like HIPAA,GDPR, etc; ‣ Developing solution; ‣ Designing database; ‣ Designing API; ‣ Writing API endpoints; ‣ Developing features.
HerHeadquarters
Game-changing collaborating app exclusive to women entrepreneurs and freelancers withinthe Fashion, Beauty, Entertainment, Events, and Public Relations industries
Responsibilities & achievements
‣ Conduct full cycle developing beginning from the backend architecture to various frontend clients. Backend Tech Stack: NodeJS, Typescript, Fastify, MongoDB, Redis, Socket.IO, JWT Authorization, Stripe. Frontend Stack: ReactJS, Redux, Redux Saga, Styled components, Reselect, Redux Form, Normalizr. Deploy: AWS (S3, CloudFront, ECS, EC2, Codepipeline)
Tap content
Development of the application for sharing media content with students in universities
Responsibilities & achievements
‣ Developing solution; ‣ Designing database;‣ Designing API; ‣ Writing API endpoints; ‣ Developing features. Main functionality: ‣ Compress and resizing image; ‣ Uploading image and video to S3; ‣ CDN; ‣ Native mobile push notification and web push notification; ‣ Collect posts for each users and university; ‣ Authentication via Cognito; ‣ Authentication via native SDK like Google, Facebook, Twitter ‣ Real time update posts and broadcasts.
Education
Higher education in Computer Science
Agency
10-50
GMT+3
Kyiv/Ukraine
Core Expertise
Industries
Architecture & Design, Information services & Technologies, Branding, design, web development
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Check if Kostya is available