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Sergii D.

Sergii D.

Odessa, Ukraine
Job Success
Top Rated Plus

Expert web developer: ReactJS, TypeScript, NextJS, NodeJS, Open AI

Are you looking for a solid dedicated team or a strong developer? Are you tired from unreliable contractors? Welcome to my profile page: 🏆 Top Rated Plus Upwork Contractor. 🏆 Head of development in The Upwork Best Creative Agency in Ukraine 2018. 🏆 Over 20 Upwork clients and more than 50 fully developed products in general. 🎯 My main skills: ・ReactJS, Redux, GraphQL, NextJS, GatsbyJS, VueJS. ・Open AI enthusiast. ・JavaScript (ES6-ES8), Typescript. ・Redux, Redux-Saga. ・NodeJS, Express, NestJS, Fastify. ・MongoDB, PostgreSQL, MySQL. ・Scss, Sass, PostCSS, HTML5, CSS3. ・Building maintainable design systems with Storybook. ・Client-side performance including AMP and PWA apps. ・Accessibility, 508 Compliance support. ・SEO Optimization. ・Cross-browser/cross-platform manual testing. ・Automation QA: Cypress, Puppeteer, Playwright, Jest, Selenium. ・Tooling: Webpack, Git, NPM. 👱‍♂️ A few words about me: ・15 years of experience in web development. ・7 years as a team manager.. ・Passionate about crafting beautiful and performant interfaces and websites.. ・Having provided consulting to dozens of clients over the past years, I know how to successfully bring projects to the finish line, and improve existing products; resulting in substantially increased revenues. 👓 A few lines from the happy clients: The efforts have continued to satisfy expectations, reducing bounce rates in a timely and effective way. Halo Lab focuses on precision, ensuring the work they deliver is thorough and correct. Their attention to detail and speed make them a valuable longterm partner. ⭐️⭐️⭐️⭐️⭐️ - Andrew Taber - Pix Wireless Beta testers are now using the new app build/website and have given positive feedback. They’ve commented on the modern look and improved usability. Halo Lab was responsive to client feedback, implementing changes on time and suggesting better solutions where appropriate. ⭐️⭐️⭐️⭐️⭐️ - Channing Dai - Bopsoft 🧬 Services I’m offering: ・Dedicated team - we provide you with a team or one engineer who has the expertise you’re looking for, and we take responsibility for the performance of these engineers or teams ・End-to-end product development - we take full responsibility for managing the web product development life cycle from planning to implementation to support and maintenance of your product ・Product MVP development - we build an unconventional product vision for your startup by developing a Minimum Viable Product in only 4 weeks ・Building solid Design Systems - that helps to maintain beautiful and consistent UI of your application ・Automation and manual testing - we help you to build a stable bug-free application by writing test scenarios, creating test plans and perform high-class testing considering your critical business flows 🛫 How my process looks like: New project onboarding phase: 1. Meeting new customer and collecting requirements of a product. 2. Writing technical specification of the project 3. Defining roadmap of the project Development phase: I’m a big fan of the agile methodologies, so my dev process sticks to it. 1. 1-week development sprint. 2. 1-2 days of QA of implemented features. 3. Continues Deployment where the client may review of all changes made during the last sprint. 4. A weekly update of what was implemented last week and what we’ll work on next week. More regular updates during the more hot periods: before/after releases or when requirements are not 100% clear.
Rating is 5 out of 5.
5.00 Dec 16, 2020 - Feb 14, 2021
Private earnings
Sergii D. has more jobs. Create an account to review them

Skills

Get started working with Sergii quickly with these predefined projects.

Get started working with Sergii quickly with these predefined projects.

You will get Open AI Integration | GPT-3.5 | ReactJS, NextJS, Wordpress or any other app

From $500
5 days delivery
Sergii D.

Sergii D.

Odessa, Ukraine
Job Success
Top Rated Plus
23
Total Jobs
892
Total Hours

View profile

Expert web developer: ReactJS, TypeScript, NextJS, NodeJS, Open AI

Specializes in
Are you looking for a solid dedicated team or a strong developer? Are you tired from unreliable contractors? Welcome to my profile page: 🏆 Top Rated Plus Upwork Contractor. 🏆 Head of development in The Upwork Best Creative Agency in Ukraine 2018. 🏆 Over 20 Upwork clients and more than 50 fully developed products in general. 🎯 My main skills: ・ReactJS, Redux, GraphQL, NextJS, GatsbyJS, VueJS. ・Open AI enthusiast. ・JavaScript (ES6-ES8), Typescript. ・Redux, Redux-Saga. ・NodeJS, Express, NestJS, Fastify. ・MongoDB, PostgreSQL, MySQL. ・Scss, Sass, PostCSS, HTML5, CSS3. ・Building maintainable design systems with Storybook. ・Client-side performance including AMP and PWA apps. ・Accessibility, 508 Compliance support. ・SEO Optimization. ・Cross-browser/cross-platform manual testing. ・Automation QA: Cypress, Puppeteer, Playwright, Jest, Selenium. ・Tooling: Webpack, Git, NPM. 👱‍♂️ A few words about me: ・15 years of experience in web development. ・7 years as a team manager.. ・Passionate about crafting beautiful and performant interfaces and websites.. ・Having provided consulting to dozens of clients over the past years, I know how to successfully bring projects to the finish line, and improve existing products; resulting in substantially increased revenues. 👓 A few lines from the happy clients: The efforts have continued to satisfy expectations, reducing bounce rates in a timely and effective way. Halo Lab focuses on precision, ensuring the work they deliver is thorough and correct. Their attention to detail and speed make them a valuable longterm partner. ⭐️⭐️⭐️⭐️⭐️ - Andrew Taber - Pix Wireless Beta testers are now using the new app build/website and have given positive feedback. They’ve commented on the modern look and improved usability. Halo Lab was responsive to client feedback, implementing changes on time and suggesting better solutions where appropriate. ⭐️⭐️⭐️⭐️⭐️ - Channing Dai - Bopsoft 🧬 Services I’m offering: ・Dedicated team - we provide you with a team or one engineer who has the expertise you’re looking for, and we take responsibility for the performance of these engineers or teams ・End-to-end product development - we take full responsibility for managing the web product development life cycle from planning to implementation to support and maintenance of your product ・Product MVP development - we build an unconventional product vision for your startup by developing a Minimum Viable Product in only 4 weeks ・Building solid Design Systems - that helps to maintain beautiful and consistent UI of your application ・Automation and manual testing - we help you to build a stable bug-free application by writing test scenarios, creating test plans and perform high-class testing considering your critical business flows 🛫 How my process looks like: New project onboarding phase: 1. Meeting new customer and collecting requirements of a product. 2. Writing technical specification of the project 3. Defining roadmap of the project Development phase: I’m a big fan of the agile methodologies, so my dev process sticks to it. 1. 1-week development sprint. 2. 1-2 days of QA of implemented features. 3. Continues Deployment where the client may review of all changes made during the last sprint. 4. A weekly update of what was implemented last week and what we’ll work on next week. More regular updates during the more hot periods: before/after releases or when requirements are not 100% clear.
Rating is 5 out of 5.
5.00 Dec 16, 2020 - Feb 14, 2021
Private earnings
Sergii D. has more jobs. Create an account to review them

Skills

Get started working with Sergii quickly with these predefined projects.

Get started working with Sergii quickly with these predefined projects.

You will get Open AI Integration | GPT-3.5 | ReactJS, NextJS, Wordpress or any other app

From $500
5 days delivery
More than 30 hrs/week

< 24 hrs response time

HALO LAB 🥇 Your Digital Partner
HALO LAB 🥇 Your Digital Partner
8,014 hours
100% Job Success
Top Rated Plus

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