Oleh

Location: Ukraine (remote) Oleh Moishevych
Gmail: [відкрити контакти](див. вище в блоці «контактна інформація») Backend engineer | 5+ years of experience
Telegram: olehmoishevych I’m a Backend Engineer with 5+ years of experience in building,
GitHub: olegmoishevych optimizing, and maintaining scalable systems. I specialize in
designing backend architectures from scratch, supporting and
LinkedIn: olehmoishevych
refactoring legacy systems, and automating infrastructure with
YouTube: oleh_moishevych modern DevOps practices.
Languages In my free time, I share insights and practical tips on my
YouTube channel, reflecting my passion for learning, teaching,
English (Upper-Intermediate) | Ukrainian - native and staying ahead of industry trends.
Technical skills Experience
Self Inspection (Full time)
JavaScript, TypeScript, PHP. Backend engineer - (February 2024 - Present)
Work in a team of 10 people.
Node.js, Nest.js, Express.js, Koa.js, React Responsibilities:
Native, React, Next.js, Vue.js. Communication with the customers, designing and implementing complex
application architectures, optimizing performance for scalable and reliable

Laravel, Yui2. systems, mentoring team members to foster professional growth.
Implementing microservices and ensuring seamless integration with diverse
technologies, enhancing the platform's capabilities through cutting-edge tools and
AWS (IAM, EC2, ECR, ECS, S3, Elastic
methodologies, implemented CI/CD pipelines to streamline deployment processes
Beanstalk, Secrets Manager, RDS, Lambda,
and reduce delivery time.
CloudWatch).
Achievements:
Improved backend performance by 20% through system and database optimization,
Redis, MongoDB, PostgreSQL, MS SQL.
boosted server speed by 30% by refactoring legacy monolithic code into
microservices.
Mongoose, Prisma, Sequelize, TypeORM,
Technologies: Node.js, React Native, TypeScript, Nest.js, PostgreSQL, TypeORM,
Knex. Prisma, Grafana, GitHub, Twilio, AWS (S3, IAM, EC2), Stripe, Microservices, gRPC,
Rest API, RabbitMQ, Docker, RBAC, Redis, JWT, npm, yarn, Swagger, Jira, DDD, fs,
CQRS, SOLID, Domain-Driven Design. Stream, Worker threads, Nodemailer, Kubernetes.
QS Games (Full time)
Microservices, RabbitMQ.
Backend engineer - (March. 2022 - February. 2024)
Work in a team of 12 people.
Elasticsearch, Grafana, Kibana. Responsibilities:
Developing and optimizing game mechanics, optimizing database structures to
REST, WebSockets (Socket.IO), gRPC, improve efficiency, providing support and maintenance for existing products,
GraphQL (Apollo). writing and running tests to ensure product quality, maintaining and updating
comprehensive documentation.
RBAC, JWT, OAuth2, Basic Authentication. Achievements:
Achieved a 60% improvement in application performance through game mechanics
PM2, npm, Yarn, Composer. optimization, increased database efficiency by 50% through structural optimization,
enhanced system stability by implementing thorough test coverage.
Docker, Jenkins, Kubernetes, Lens. Technologies:
Node.js, Terraform, Nest.js, PHP, YUI2, PayPal, Swagger, JSDocs, Jest, jQuery,
Heroku, Vercel, Render, Netlify. Socket.IO, JavaScript, TypeScript, Express, MySQL, Transactions, npm, composer,
Knex, Jenkins, GitLab, Jira, REST API, pm2.
Exceljs, Puppeteer. Rastcom Canada (Part time)
Backend engineer - (March. 2022 - November. 2023)
GitHub, GitLab (CI/CD), Gh. Work in a team of 2 people.
Responsibilities:
MetaMask API, Web3.0, reCAPTCHA. Backend Development from Scratch to Production Deployment, deployed the
application on AWS servers, leveraging AWS Elastic Beanstalk for efficient
API integrations (Telegram/Slack Bots, orchestration and management of resources.

Mailgun, Stripe, PayPal, Braintree etc.) Achievements:
Successfully designed and implemented the architecture of a scalable and robust
backend application, tailored to business requirements, created an efficient
Swagger, JSDoc, GraphQL Playground.
database architecture, ensuring data consistency, optimized queries, and enhanced
overall performance, successfully developed, launched, and deployed a production-
Jira, YouTrack, Trello (Scrum, Kanban).
ready backend system, including infrastructure setup and configuration on AWS
Elastic Beanstalk.
Jest (for tests).
Technologies:
Node.js, JavaScript, TypeScript, React Native, Nest, Mongoose, MongoDB, Mongo
macOS, Linux, Bash Scripts.
Atlas, AWS (S3, Elastic Beanstalk, Secrets Manager), npm, yarn, React, Axios,
Nodemailer, Braintree, SSE, Swagger, Rest, WebSocket, Socket.IO, JWT, OAuth2,
MetaMask, Redis, GitHub, CI/CD, Docker.
 iTechArt (Full time)
FullStack engineer - (January. 2020 - March. 2022)
Work in a team of 6 people.
Responsibilities:
Communication with the customers, developing applications from scratch and maintaining existing systems, designing and
implementing robust APIs, optimizing database performance, achieving up to a 30% increase in backend system efficiency,
migrating monolithic architectures to microservices to enhance scalability and reliability, optimizing frontend performance,
resulting in an 80% faster page load time.
Achievements:
Improved backend performance by 30% through database and system optimization, successfully transitioned legacy monolithic
applications to microservices, enabling better system scalability and maintainability, enhanced client-side performance, reducing
page load times by 20% through optimization techniques, fs, Stream, Redis.
Technologies: React Native, Node.js, JavaScript, TypeScript, Express, Nest.ts, TypeORM, MsSQL, MongoDB, PostgreSQL,
Mongoose, Mongo Antlas, Prisma, AWS, Stripe, Microservices, npm, yarn, React, Axios, Nodemailer, Koa, Swagger, Rest API,
GraphQL, Apollo, RabbitMQ, pm2.
Education
Institute of Engineering, National University of Zaporizhzhia (2019-2020)
Master's degree in Computer Science
Institute of Engineering, National University of Zaporizhzhia (2017-2019)
Bachelor's degree in Computer Science
College of Economics and Law of Zaporizhzhia (2013-2017)
Master's degree, software engineering
Licenses & certifications
AWS Cloud Technical Essentials
Kubernetes
Linux
Agile Project Management
JavaScript
SQL
React