Dmytro is available for hire
Hire DmytroDmytro Snisarenko
Verified Expert in Engineering
Front-end Developer
Amsterdam, Netherlands
Toptal member since August 17, 2020
Bio
Dmytro is a full-stack/devops engineer with over 18 years of experience. On his way he bootstrapped a working business (mobile apps + browser extensions + web app + thousands of SEO-friendly pages + AWS backend), rewrote and sped up a client-facing web server for the largest airline in the world, contributed to the success of the largest freelance marketplace. Authored several open-source projects used by millions of people every month.
Portfolio
Vocably
Extensions, Amazon Web Services (AWS), PWA, Angular, Terraform, CI/CD Pipelines...
KLM Royal Dutch Airlines
TypeScript, Terraform, MySQL, Redis, MongoDB, Azure, Angular, Kubernetes...
John Deere
Amazon Web Services (AWS), Terraform, Angular, Unit Testing
Experience
- Front-end - 13 years
- Unit Testing - 10 years
- E2E Testing - 7 years
- Node.js - 4 years
- Angular - 3 years
- RxJS - 3 years
- TypeScript - 3 years
- React - 2 years
Preferred Environment
Continuous Delivery (CD), Continuous Integration (CI), WebStorm, MacOS
The most amazing...
...product I've built is a job posting engine for one of the largest freelance marketplaces on the planet.
Work Experience
Founder, Software Engineer
2021 - PRESENT
Vocably
- Developed and published a Chrome Extension that lets users look up unfamiliar words.
- Created a progressive web application (PWA) that lets users learn the words they looked up with the extension.
- Built a back end that provides the necessary functionality for the extension and PWA.
Technologies: Extensions, Amazon Web Services (AWS), PWA, Angular, Terraform, CI/CD Pipelines, DevOps, Unit Testing
Senior Full-Stack/DevOps Engineer
2022 - 2024
KLM Royal Dutch Airlines
- Senior Full-Stack/DevOps engineer for a mission-critical project at one of the world’s largest airlines. The project generates up to $1 billion per month in ticket sales. One hour of downtime costs an average of $200k.
- Rewrote and optimized the architecture of the Node.js web server for the front pages of klm.com and airfrace.fr (which receives traffic from 200k unique users per day).
- Located the bottleneck and improved the performance of the microservices responsible for passenger checkout by 4x.
Technologies: TypeScript, Terraform, MySQL, Redis, MongoDB, Azure, Angular, Kubernetes, CI/CD Pipelines, GitHub Actions, Unit Testing, E2E Testing, GraphQL
Software Engineer
2021 - 2021
John Deere
- Developed a system that receives, stores, and processes operation metrics from different types of vehicles, mainly AWS, Terraform, DynamoDB, and Lambda.
- Built a sales tool that helps users track, analyze, and predict various machinery metrics, mainly Angular, OAuth, AWS, and Terraform.
- Developed a metric conversion algorithm and grammar.
Technologies: Amazon Web Services (AWS), Terraform, Angular, Unit Testing
Full-Stack Engineer
2019 - 2021
DAZN
- Collaborated with principal engineers and stakeholders to facilitate multiple improvements speeding up the development and release process (DX team).
- Developed a user settings chapter of a highly loaded website.
- Built a number of development and business-support tools.
Technologies: Bootstrap, JavaScript, Front-end, OAuth, HTML, CSS, Amazon Web Services (AWS), Next.js, GraphQL, RxJS, MobX, Terraform, Node.js, Redux, React, TypeScript, MySQL, Tailwind CSS, Unit Testing, E2E Testing
Senior Front-end Developer
2017 - 2019
KLM Royal Dutch Airlines
- Developed and launched a fault-tolerant hybrid application used daily by over 300 KLM mechanics in Amsterdam, Schiphol airport.
- Achieved a clean record of critical issues for one year straight in a critical, high-expectation environment.
- Open-sourced a library, solving a common Ionic CORS problem with over a thousand weekly downloads in 2019.
Technologies: Front-end, CSS, HTML, Ionic, Jest, Redux, Angular, TypeScript, Unit Testing, E2E Testing
Senior Front-end Developer
2014 - 2017
Knab Hypotheek (Amsterdam)
- Developed a flexible registration process and 16 tools intended to gather detailed customer legal and financial data.
- Achieved a first-page rank score in Google Search results for the most popular keywords in a highly competitive area by applying performance and UX optimizations.
- Introduced and open-sourced a corporate style guide and component library as a result of collaboration with the design team.
- Introduced a test-driven development process with Karma and test automation with Protractor.
Technologies: Karma, Protractor, ECMAScript (ES6), Unit Testing, E2E Testing
Senior Front-end Developer
2012 - 2014
A Large Freelance Marketplace (under NDA)
- Developed a job posting template engine that has been used by the high-traffic platform for several years.
- Introduced test-driven development (TDD) as a to-go approach for the entire company.
- Created many features that significantly optimized the project as the senior front-end developer for the job posting team.
Technologies: HTML, CSS, JavaScript, Unit Testing
Experience
Vocably
https://vocably.proVocably is a platform, both an extension and an app, that helps users to look up new words while surfing the web and study those words as flashcards on mobile.
As a founder and the only developer of Vocably, my tasks and responsibilities included:
• Developing the back end with AWS, GCP, Lambda, API Gateway, and Cognito.
• Developing the front-end and mobile experience (PWA) with Angular and Amplify
• Developing the Chrome Extension with Vanilla and Web Components.
• DevOps with CircleCI, Terraform, Node.js, Zx, and Bash.
• Testing with Jest, Cypress, and Endtest.io.
• Market analysis, product marketing, cost, and pricing analysis.
As a founder and the only developer of Vocably, my tasks and responsibilities included:
• Developing the back end with AWS, GCP, Lambda, API Gateway, and Cognito.
• Developing the front-end and mobile experience (PWA) with Angular and Amplify
• Developing the Chrome Extension with Vanilla and Web Components.
• DevOps with CircleCI, Terraform, Node.js, Zx, and Bash.
• Testing with Jest, Cypress, and Endtest.io.
• Market analysis, product marketing, cost, and pricing analysis.
Mobile App for KLM Mechanics in Amsterdam Airport
This is a real-time fault-tolerant hybrid mobile application used by 330 KLM mechanics at Schiphol airport to perform between-the-flight aircraft maintenance. The application displays KLM's p-to-date fleet schedule and towing information. It helps team leaders to manage teams and provides the mechanics with an outline of the scope of work. I developed this app with Ionic, Angular, TypeScript, and OAuth.
Settings Chapter of DAZN Website
I developed the settings chapter of a highly loaded sports streaming multi-regional website. Within the settings chapter, a user can manipulate subscriptions, set up payment methods, the language, region, and manage devices. I was the front-end engineer for the project and worked with the business analyst, back-end team, and testers developing with React, Mobx, ES6, Jest, and Selenium.
Education
2002 - 2007
Master's Degree in Computer Science
Sevastopol National Technical University - Sevastopol, Ukraine
Certifications
JANUARY 2019 - JANUARY 2022
AWS Certified Solutions Architect - Associate
Amazon Web Services
APRIL 2018 - PRESENT
Professional Scrum Master I
Scrum.org
DECEMBER 2017 - PRESENT
React Nanodegree
Udacity
JANUARY 2011 - PRESENT
Zend Certified Engineer (PHP)
Zend
Skills
Libraries/APIs
React, Node.js, RxJS, MobX, Stripe
Tools
Karma, Webpack, Terraform, WebStorm
Languages
TypeScript, JavaScript, ECMAScript (ES6), CSS, HTML, GraphQL
Frameworks
Redux, Angular, Jest, Ionic, Protractor, Next.js, Bootstrap, Tailwind CSS
Paradigms
Scrum, Unit Testing, E2E Testing, Agile, Continuous Integration (CI), Continuous Delivery (CD), DevOps, REST
Platforms
Amazon Web Services (AWS), Azure, Kubernetes
Storage
MySQL, Redis, MongoDB
Other
Front-end, Web Components, OAuth, Cloud Computing, Algorithms, Data Structures, Computer Networking, Extensions, PWA, CI/CD Pipelines, Progressive Web Applications (PWAs), PayPal, GitHub Actions
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