Publication
Integration and End-to-End Tests Made Easy With Node.js and MongoDB
https://www.toptal.com/developers/nodejs/integration-and-e2e-tests-nodejs-mongodb
Mikhail is currently unavailable
Mikhail Angelov
Verified Expert in Engineering
LangChain Developer
Nizhny Novgorod, Nizhny Novgorod Oblast, Russia
Toptal member since July 6, 2015
Bio
Mikhail is a software engineer looking for challenging projects. He's completed several web-based projects with Node.js and Go (back end) and JavaScript SPA (front end). He has experience working with React, Riot.js, AngularJS UI frameworks, Flux and Redux architectures, and back-end development (architecture, testing, deployment, monitoring, reporting, and more). Mikhail is looking for front-end development gigs, but can work with the back end as well.
Portfolio
Tealbook
JavaScript, TypeScript, Express.js, Node.js, Jest, APIs, SQL, React...
Toptal Client
Node.js, React, DigitalOcean API, NestJS, TypeScript, Go
Web Chat Project (via Toptal)
Amazon Web Services (AWS), AWS Lambda, WebSockets, MongoDB, Node.js, React...
Experience
- Node.js - 6 years
- Docker - 6 years
- React - 5 years
- TypeScript - 5 years
- NestJS - 3 years
- LangChain - 1 year
Preferred Environment
Git, Visual Studio Code (VS Code), MacOS
The most amazing...
...thing I've developed is a text and voice chat webinar platform based on the TypeScript and JavaScript stack, with web, mobile, and AI services.
Work Experience
Software Engineer
2022 - 2025
Tealbook
- Designed, implemented, and supported three web applications on TypeScript, NestJS, and React.
- Added integration with a number of 3d-party services.
- Successfully released and maintained a relatively big, scalable application.
Technologies: JavaScript, TypeScript, Express.js, Node.js, Jest, APIs, SQL, React, Google Cloud Platform (GCP), NestJS, Docker, Atomic CSS, PostgreSQL, MongoDB
Full-stack Engineer
2020 - 2021
Toptal Client
- Designed and developed a web application for booking bowling lanes.
- Used TS stack, React, Redux, Nest.js on Node.js server, Type or ORM on Postgres database, Nginx (reverse proxy, LE TLS certificates auto-update), Mailgun, Monit, Docker, and GitHub actions.
- Completed more than 10 integrations with third-party services such as Stripe, Heartland Payment, GTM, and MailChimp, among others.
- Developed a minimum viable product from scratch in three months, which was launched for production in six months.
Technologies: Node.js, React, DigitalOcean API, NestJS, TypeScript, Go
Full-stack React Developer
2017 - 2018
Web Chat Project (via Toptal)
- Designed and developed the UI for an app with React/Redux.
- Built and designed the back end for an app with Node.js, Express, and Mongo web sockets.
Technologies: Amazon Web Services (AWS), AWS Lambda, WebSockets, MongoDB, Node.js, React, Socket.IO
Full-stack Developer
2017 - 2017
Worldcovr (via Toptal)
- Created and supported two applications on MERN stack.
Technologies: Azure, Docker, MongoDB, Redux, React, Node.js, Socket.IO
MEAN Stack JavaScript Developer
2016 - 2017
Kemvi (via Toptal)
- Created several microservices.
Technologies: Amazon Web Services (AWS), Docker, AngularJS, Chrome Extensions, Node.js, TypeScript, Socket.IO, Go
Front-end Angular Expert
2015 - 2016
AlternaScript (via Toptal)
- Refactored a web application based on AngularJS.
- Made a flow diagram editor based on www.jsplumbtoolkit.com.
- Created a mobile application photo based on www.appgyver.com.
- Applied Flux architecture to the Angular app.
- Added E2E and unit tests for Angular applications.
Technologies: JavaScript, Flux, AngularJS, TypeScript, Socket.IO
Team Lead and Senior Developer
2013 - 2016
Smartbics
- Created the front-end portion of several small enterprise projects for company security and product information management as well as a self-service kiosk.
- Wrote more than 15,000 lines of code in JavaScript.
- Utilized Protractor framework for the self-service kiosk, which was the first project with 100% acceptance test coverage on the front-end side.
- Automated package management, test, and build procedure using Gulp, NPM, and Bower.
- Gained great experience with AngularJS.
Technologies: Java, JavaScript
Project Manager
2012 - 2013
Auriga
- Managed staff members in a distributed team across Boston, Moscow, Vilnius, and Nizhny Novgorod.
- Gained my first experience with web technology in the form of a time tracking application on Node.js.
Technologies: JavaScript, Java
Team Lead and Software Engineer
2009 - 2012
Mera
- Contributed to the development of a mobile navigation application.
- Followed Scrum dev processes.
- Created the skeleton of a BlackBerry map application for BB10 platform.
- Supported the mobile navigation application on the Brew platform.
Technologies: QML, C#, C++, C
Software Developer and Team Lead
2002 - 2009
Teleca
- Contributed to firmware development for Motorola and Kyocera phones.
- Conducted QA for a game console based on Qualcomm SoC.
Technologies: ARM, C++, C
Experience
German-Estonia History Map
German-Estonia history map project
BE: java 1.7/Spring/MySQL
FE: AngularJS 1.x, leaflet, OSM
BE: java 1.7/Spring/MySQL
FE: AngularJS 1.x, leaflet, OSM
Self Service Kiosk
Self service kiosk for check-in operations on a ferry.
Product Information Management
A web application for management product attributes, clients, suppliers, agreement (about 100 tables).
Web-based Game (Personal Project)
A 3D game based on WebGL (Three.js lib) web shaders.
Whiteboard App
Pure client app on React and Immutable.js
code: https://github.com/mikhail-angelov/react-whiteboard
code: https://github.com/mikhail-angelov/react-whiteboard
Education
1992 - 1998
Master's Degree in Radio Physics
Nizhegorodsky State University - Nizhniy Novgorod, Russia
Skills
Libraries/APIs
Node.js, Riot.js, React, Vue, Socket.IO, WebRTC, DigitalOcean API, Three.js, Atomic CSS
Tools
Gulp, Rollup, Webpack, Amazon Elastic Container Service (ECS), Mocha, Karma, Claude Code, Shadcn, Git, Amazon Virtual Private Cloud (VPC), AppGyver, jsPlumb, RabbitMQ
Languages
JavaScript, TypeScript, Go, C++, C#, QML, C, Java, SQL, Dart
Frameworks
Redux, Flux, AngularJS, Svelte, Protractor, React Native, LangGraph, Angular, Ext JS, Spring, Spring MVC, Flutter, Cypress, NestJS, Express.js, Jest
Platforms
Docker, Azure, Linux, AWS Lambda, MacOS, Amazon Web Services (AWS), Visual Studio Code (VS Code), Google Cloud Platform (GCP)
Paradigms
Unit Testing, Agile Software Development, E2E Testing, Model Context Protocol (MCP)
Storage
MongoDB, MySQL, PostgreSQL, Redis
Other
LangChain, ARM, Chrome Extensions, WebSockets, Web Applications, APIs
Collaboration That Works
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
1
Share your needs
Discuss your requirements and refine your scope in a call with a Toptal domain expert.
2
Choose your talent
Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.
3
Start your risk-free talent trial
Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.
Top talent is in high demand.
Start hiring