Serguei Nevarko
Verified Expert in Engineering
Software Developer
Dollard-Des Ormeaux, QC, Canada
Toptal member since May 10, 2022
Serguei specializes in code architecture, React efficiency, and back-end flexibility. The more complex and interactive the app, the more he will shine. He has built many web applications from the ground up while working as a freelancer and communicates well with clients. By being used to constantly learning new things, Serguei will always be able to adapt to any requirements or propose new and better ways to structure the application.
Portfolio
Experience
- HTML - 10 years
- JavaScript - 10 years
- MySQL - 9 years
- React - 6 years
- APIs - 5 years
- Node.js - 5 years
- CSS - 4 years
- MongoDB - 3 years
Availability
Preferred Environment
Node.js, React, MongoDB, MySQL, JavaScript
The most amazing...
...tech startup I've co-founded is an automated solution that engages with high-value prospects on LinkedIn: multi-modules from scraping, scanning, and queuing.
Work Experience
Software Developer
Checkflo
- Developed the software that allows clients to log in with QuickBooks and import their check information into our software. The next business day, they are generated, printed with the appropriate shipping labels, and sent out by the company.
- Developed RESTful APIs for our clients so that they can upload batches of checks to print out.
- Integrated processing modules using various APIs like Versapay, Endicia and USPS, Trulioo, and Duo.
Software Developer
Progamma
- Developed a chatbot with Botpress that answers questions based on the rules and guidelines of Health Canada, WHO, FDA, and EMA.
- Created a RAG from scratch with my own embeddings and ChatGPT API to answer user questions since Botpress wasn't good enough to give us enough control.
- Developed the entire application from scratch (MVP of the project), which includes the front and back end, with deployment online.
Senior Full-stack Developer
Code Particle Inc.
- Fixed software bugs and UI issues on both the front and back end.
- Worked on automation to test the application when a new version was released.
- Added new features to the application when required.
- Helped with updating the Next.js app to the newer version with the new folder structure.
Full-stack Developer
Crockpot Enterprises LLC
- Built a responsive web application from scratch for a lottery number generator in React and Node.js and deployed everything online.
- Made a custom calibration section on the website so clients get results uniquely calibrated to their printers at home.
- Made an admin page to control website features and create guest accounts.
Full-stack Developer
Toronto Boutique Apartments
- Used the Guesty API to fetch all relevant data about properties and remade their entire front-end website from scratch.
- Integrated Stripe to process payments on a very specific payment schedule.
- Created several reusable and efficient components in React to facilitate project development.
- Integrated Postmark API to be able to send emails to customers.
- Did weekly deployments online and calls with the client for a smooth development cycle.
Senior Full-stack Developer
Whistlaw
- Developed a whistleblower system to help European companies conform to the new EU regulations.
- Wore multiple hats to develop the software to allow whistleblowers to submit fraudulent/illegal activities anonymously, having organization handlers to manage these cases and admins to track the overall progress with charts.
- Built custom charts, modern-looking dashboards, filterable tables, notification system, and PDF generation.
- Created an advanced subscription module with different prices using Stripe API.
- Implemented different APIs: Dropbox, Stripe, and Postmark.
- Recreated Figma designs in React that the client provided.
Front-end Developer
Bassam Abdellatif
- Developed an app that manages real-estate rentals between property managers, landlords, and tenants.
- Created a multi-login with different accounts and dashboards. Each account type has its own set of pages and permissions.
- Set up several APIs (Google Maps, Stripe, file management, etc.) to fit project requirements.
Software Developer
9277-0759 Quebec Inc.
- Developed a desktop application using Windows Forms. Since there were many screens, each one was built as a .dll file and dynamically imported into a custom tab control to have multiple windows at once.
- Created various custom controls for the user interface.
- Developed a customized mailing module using the SMTPS protocol. The one provided by default did not have the option for a bounce address, so it had to be implemented manually.
Experience
Systematic Organic Results (SOR)
https://sor-seo.com/Since other businesses are in the market about 5% of the time, after our campaign ends, the client is left with a powerful network of people they can follow up with in the future, either by message or phone call.
Code Farm Online | Programming Course
Education
Bachelor's Degree in Computer Science
McGill University - Montreal, QC, Canada
Skills
Libraries/APIs
Node.js, React, REST APIs, Stripe, Stripe API, Socket.IO, Puppeteer, Windows Forms (WinForms), Google Maps, Dropbox API, Google Maps API, Shopify API, Playwright, OpenAI API
Tools
MongoDB Atlas, Figma, GitHub, Postman, ChatGPT
Languages
JavaScript, PHP, HTML, CSS, HTML5, ECMAScript (ES6), SCSS, TypeScript, CSS3, SQL, C#, Python
Frameworks
Express.js, Redux, Vanilla JS, Tailwind CSS, Botpress.io, Next.js, .NET, React Native
Paradigms
REST, Back-end Architecture, Design Patterns, Responsive Web Design (RWD), UI Design, UX Design, Web UX Design
Storage
MongoDB, MySQL, Database Modeling, Databases
Platforms
Heroku, Azure, Amazon Web Services (AWS), Dokku, Docker, Twilio, Voiceflow
Other
APIs, Full-stack, Front-end, Back-end, Web Development, API Integration, Architecture, Technical Architecture, Front-end Development, Minimum Viable Product (MVP), User Experience (UX), Software Architecture, Full-stack Development, Web App Development, MERN Stack, UI Development, Startups, Leadership, Mobile First, Payment APIs, Responsive Web Apps, Chatbots, Algorithms, Writing & Editing, UI Animation, Web Animation, Live Chat, Cloud Storage, Charts, Styled-components, UI Components, User Interface (UI), Web Scraping, PayPal, Reports, Dashboards, Single Sign-on (SSO), eCommerce, Headless CMS, ChatGPT API, Large Language Models (LLMs), OpenAI, Vite, Artificial Intelligence (AI)
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