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VLADIMIR LADYKA

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@AnlorNode
01/02/1988
Kyiv
E-mail
github
linkedin.com

TARGET

Experience: Senior NodeJS Developer Employment: full time

PROFESSIONAL COMPETENCE

Technical skills
General: OOD, Algorithms, Design Patterns, SOLID, TDD, BDD
Programming
languages: Node.js (Express, Koa.js , Sequelize, Knex),
JavaScript (React.js, Socket.IO, Vue.js)
TypeScript, SQL
Web-design: HTML 5, CSS 3, Bootstrap3
Development Tools: OOD, Algorithms, Design Patterns, SOLID, TDD, BDD
Technologies: Node.js, JavaScript, TypeScript, AWS, Git, REST, API,
MongoDB, PostgreSQL, Docker, Express.js, MySQL,
Nest.js, SQL, OOP, Linux, CSS, HTML, JSON, Express,
Cloudflare, GraphQL, Redux, ES6+, NestJS,
AWS, TypeORM, Redis, HTML5, React, Jest, CI/CD,
Webpack, CSS3, Nginx, Swagger, ES6, Microservices,
NoSQL, Postman, Design, Patterns, SASS, WebSockets,
Next.js, Docker/Kubernetes/Swarm, ArgoCD, Grafana,
EKS, RabbitMQ
Database Systems: MySQL, MongoDB, Redis, PostgreSQL, Elasticsearch,
ClickHouse
QA: Unit testing
Operating Systems: Mac OS, Linux, Ubuntu, FreeBSD
Other software: WebStorm, Visual Studio Code, EmEditor
PROFESSIONAL COMPETENCE

Team Lead / Backend NODE.JS DEVELOPER 04.2023 - present
Company Slot Pay, Kyiv, a team of 800 peopl https://slotscity.ua

Projects:
− Spearheaded payment integration with banks and payment providers across Ukraine and
Europe.
− Developed a system for tracking and analyzing interaction statistics.
− Implemented a mechanism for monitoring incoming deposits in real-time.
− Built an emulation and validation system for existing product mechanics.
− Led communication and customization efforts for new integration projects.
− Engineered solutions to significantly increase product throughput capacity.
− Established a robust mechanism for logging and tracking errors to ensure system stability.
− Collaborated effectively with the team and addressed business requests promptly
The main technologies with which he worked:
• backend: Node.js, AWS, Cloudflare, Redis, Docker, Kubernetes , RabbitMQ, CI/CD
• database: PostgreSQL ,Redis, Elasticsearch
• testing: Full test coverage

Tech Lead / Backend NODE.JS DEVELOPER 10.2019 - 04.2023
Company AdLords, Kyiv, a team of 40-50 peopl https://olymptrade.com

Projects:
− Smooth integration with various financial data providers and trading platforms, considering
parameters like country (Ukraine, USA, and potentially others), language, asset category
(stocks, bonds, ETFs, etc), and specific financial products
− Team tracking, management, performance reviews, and appraisals of the development team
working on brokerage platform features
− Providing alternate technical solutions and improving existing internal or open-source tools
used for trading, market analysis, or client management, with a focus on cost efficiency and
performance
− Develop secure and efficient web APIs to integrate with native mobile applications for
trading, account management, and data visualization This includes handling real-time market
data and transaction processing
− Planned, designed, implemented, and maintained the core components of the brokerage
platform, including trading interfaces (web and mobile), backend systems, and databases for
storing financial data and user information
− Creating a mechanism for monitoring real-time market data feeds and transaction processing
to ensure data accuracy and system reliability
− Creating a mechanism for simulating trading scenarios and validating the correctness of
trading algorithms and order execution logic
− Communication and integration of new financial instruments, exchanges, and services into
the platform, requiring collaboration with external partners and internal teams
The main technologies with which he worked:
• backend: Node.js (express, Socket.IO, TypeScript), Redis, Docker, Docker- swarm,
RabbitMQ, CI/CD, mt5
• database: MySQL ,Redis, Elasticsearch
• frontend: React.js (v 16+), SPA (Pre-render), TypeScript
• testing: unit testing
 Backend NODE.JS DEVELOPER 06.2019 - 10.2019
Company 1WIN, Kyiv/St. Petersburg, a team of 120-140 people https://1win-mirror.ru/

Projects:
− development of an online service to get the results of matches, tournaments and possible
outcomes for the game
− multi-service system development to increase stability
− development of a communication system using (WebRTC, Socket.IO)
− setting up remote servers
− optimizing existing code implementations to increase performance
− queuing for load balancing with RabbitMQ
− implementation of data caching systems using Redis

The main technologies with which he worked:
• backend: Node.js (koa, mySql2, Socket.IO), Redis, jwt, Docker, Docker-compose, RabbitMQ
• database: MySQL, Redis
• testing: Mocha

FULL-STACK NODE.JS DEVELOPER 05.2018 - 06.2019
Company AvtoBazar, Kyiv, a team of 30-35 people https://ab.ua

Projects:
− Support online service for dealers
− development of a system of isomorphic interaction with the server
− development of an existing project management

The main technologies with which he worked:
• backend: Node.js (express), Redis, nodemailer, jwt
• frontend: React.js (v 16+), SSR
• database: PostgreSQL
• testing: Mocha

FULL-STACK NODE.JS DEVELOPER 12.2017 – 05.2018
Company HERBALIFE , Kyiv, a team of 20-30 people https://herbalife.ua

Projects:
− online service development for medical services
− development of a system of multi-level access to personal data using roles (ACL)
− development of audio and video communication system for the staff and clients of the clinic
(WebRTC, Socket.IO)

The main technologies with which he worked:
• backend: Node.js (express, mongoose, Socket.IO), Redis, nodemailer, jwt, pm2
• frontend: React.js (v 16+), SPA
• database: MongoDB (writing analytical queries), Redis (queues, inter-thread connection

BACK NODE.JS DEVELOPER 09.2017 – 12.2017
Company PROF-IT GROUP, Kyiv, a team of 20-30 people https://prof-it.bz
Projects:
− development of a platform for opening decentralized autonomous organizations (DAO) using
blockchain technology
− creating an ethereum connection in web3 using geth on the Node.js platform, creating a
smart contract with simple logic
− launch of cross-platform application based on the Electron platform

The main technologies with which he worked:
• Node.js, jQuery, JavaScript, Vue.js
• HTML5, CSS3, Bootstrap 3
• Webpack, Gulp

FULL STACK WEB DEVELOPER 01.2014 – 06.2017
Real estate agency «VITYAZ» (own project) Kyiv, a team of 9 people http://vityaz.kyiv.ua/
− development services for property managers
− setting up online payment systems for clients to access the main service
− development of an additional service for searching and analyzing data from various
sources of advertising and then structuring them for publication on the main service

The main technologies with which he worked:
• backend: Node.js (Koa.js)
• frontend: Vue.js (v 2)
• database: PostgreSQL

PROGRAMMER (FREELANCE) 08.2013 – 12.2013
− completion of existing projects, optimization of page layout
− introduction of new server functions, such as: sending mail, sms, creating tables, fees,
and optimizing queries to them, followed by conducting a full cycle of negotiations
with the customer, collecting requirements and creating TK
− recording data (MySQL and MongoDB)
− project evaluation and implementation plan
− transfer of services from http protocol to https
− creating a project team, setting tasks and monitoring their implementation in accordance
with the conditions
− handover of a turnkey project to a customer

PROGRAMMING ENGINEER 08.2013 – 11.2015
Company «SHILOV» Donetsk
− software development for information automation from 72 sites
− consciousness of libraries in Microsoft Access format
− creating macros to improve work in Microsoft Excel and EmEditor
− creation of technical documentation

WEB DEVELOPER 04.2012 – 07.2013
Real estate agency «PARK LANE» Donetsk https://parklane.ua
− development, technical support and development of the site functionality
− installing and configuring hosting with the joomla 2.5 engine
− writing javascript scripts to convert data
EDUCATION

DON STATE TECHNICAL UNIVERSITY (DSTU) 2009 – 2012
Specialty: urban and industrial construction engineer

ADDITIONAL EDUCATION
Experience: Over 6 years JavaScript software engineer
I can intelligently choose software and architectural solutions.
I have experience in business development both in a team and on my own.
Understand and be able to articulate development standards

Self learning online: 2013 – 2020

− «The complete guide to React and Node (including MVC, REST API, GraphQL»
− «FullStack-Master. Full Stack Web Development with Laravel and Vue.js»
− «CRM system development on Node.js, Express, React»
− «MySQL Essential»

Courses "Node.js creation of web applications" 02.2016 – 10.2016
Courses «PostgreSQL» 08.2016 – 10.2016
Courses «CSS3» 09.2016 – 12.2016
Courses «JavaScript» 06.2014 – 07.2016