Denis is available for hire
Hire DenisDenis Orlov
Verified Expert in Engineering
React Developer
İstanbul, Turkey
Toptal member since December 14, 2021
Bio
Denis is a highly experienced senior front-end developer with over a decade of expertise in the industry. His extensive career has revolved around working on complex projects catering to both business-to-business (B2B) and business-to-government (B2G) domains. Denis's specialization lies in crafting adaptive layouts and utilizing cutting-edge web application technologies. His passion lies in developing bespoke products and comprehensive solutions tailored to diverse client requirements.
Portfolio
LandVault
Next.js, REST, TypeScript, React, Styled-components, Node.js, HTML5, Front-end...
TrueCare24
React, TypeScript, Webpack, Next.js, Jest, REST, Recoil, React Redux, Docker...
Benovate
React, JavaScript, TypeScript, Webpack, Django, Python, jQuery, Bootstrap...
Experience
- CSS - 10 years
- HTML - 10 years
- JavaScript - 10 years
- React - 8 years
- TypeScript - 5 years
- Emotion Library - 4 years
- Next.js - 4 years
- Recoil - 3 years
Availability
Full-time
Preferred Environment
React, Next.js, Front-end
The most amazing...
...project I've worked on is developing the entire front end for the number one nationwide care platform in the USA.
Work Experience
Principle Front-end Developer
2021 - PRESENT
LandVault
- Ensured seamless integration with the blockchain using different Web3 tools like Ethers.js, Web3.js, Hardhat, and Trufflesuite. Developed efficient and responsive user interfaces using React, TypeScript, Next.js, @emotion, and Recoil.
- Developed an internal platform, resulting in increased efficiency and productivity for the company, demonstrating strong problem-solving and project management skills.
- Built a solid foundation for all projects in the web department, which continues to be used as a template for current and future projects. Created core design package with reusable components and utilities used in all LandVault projects.
- Led the effort to revamp the technical stack and eliminate technical debt, resulting in better performance and more reliable products.
- Helped build a culture of excellence within the web development department, fostering an environment of innovation and growth. Successfully implemented modern quality standards and best practices, resulting in significantly improved product delivery.
- Mentored and provided code reviews for team members to ensure high-quality front-end development. Maintained a keen eye for detail, ensuring all code was thoroughly checked before deployment.
Technologies: Next.js, REST, TypeScript, React, Styled-components, Node.js, HTML5, Front-end, REST APIs, CI/CD Pipelines, Web Development, GitHub, Websites, Vercel, Git, Storybook, CSS3, Responsive Web Design (RWD), Express.js, APIs, Responsive Design, Cross-browser Compatibility, Charts, GrammY, Telegram Bots, Bots, Telegraf
Lead Full-stack Developer
2018 - 2021
TrueCare24
- Developed a vaccination passport system to track individual immunization status.
- Implemented COVID-19 control measures for schools and businesses through the use of advanced monitoring technology. Leveraged data analysis tools to identify patterns in COVID-19 cases and inform decision-making.
- Streamlined the process of vaccine administration by creating a user-friendly registration system.
- Developed a comprehensive recruitment strategy for hiring qualified healthcare professionals to provide care in patient's homes.
- Achieved compliance with security and privacy regulations by implementing secure communication protocols for the company's healthcare platform.
- Designed and developed Full Stack for internal and external products of the company using React, TypeScript, Next.js, PHP, and other modern technologies.
- Contributed to developing the company's mobile application using React Native, enhancing accessibility and convenience for patients and care providers.
- Developed company coding standards and guidelines, improving code quality and consistency across the company's products.
- Demonstrated a strong attention to detail while conducting code reviews, resulting in a 90% reduction in bugs and errors in the codebase.
Technologies: React, TypeScript, Webpack, Next.js, Jest, REST, Recoil, React Redux, Docker, Material UI, Styled-components, CSS, HTML, MySQL, PHP, jQuery, JavaScript, Less, Sass, Figma, Redis, Fetch API, Web, Create React App, Node.js, HTML5, Front-end, REST APIs, CI/CD Pipelines, Web Development, GitHub, Websites, Vercel, Git, Storybook, CSS3, Responsive Web Design (RWD), Express.js, APIs, Responsive Design, Cross-browser Compatibility, Charts, GrammY, Telegram Bots, Bots, Telegraf
Front-end Engineer
2016 - 2018
Benovate
- Developed over 15 websites for prominent brands such as World of Tanks, Sokolov Jewelry, Moscow State University, Russian Railways, and many others.
- Demonstrated expertise in developing websites that meet the unique needs of diverse industries and sectors.
- Created user-friendly websites for medical appointment booking across multiple regions of Russia, which are used by millions of people to this day.
- Provided ongoing support for legacy projects, ensuring they remained functional and up-to-date. Developed and implemented strategies for improving website performance and user experience.
- Collaborated with clients to identify and address their specific website needs and preferences.
Technologies: React, JavaScript, TypeScript, Webpack, Django, Python, jQuery, Bootstrap, Sketch, Photoshop CC, Axure RP Pro, CSS, Styled-components, Redux, React Redux, Less, Web, Create React App, HTML5, Front-end, REST APIs, Web Development, GitHub, Websites, Git, CSS3, Responsive Web Design (RWD), Express.js, APIs, Responsive Design, Cross-browser Compatibility
Director of Front-end Engineering
2015 - 2018
Universal Technical Systems
- Developed groundbreaking vehicle inspection software, now the industry standard in Russia. Enhanced inspection efficiency and accuracy through innovative software and hardware solutions.
- Devised a technical solution for conducting technical inspections at specialized points.
- Created a tool for document and payment control using React and Meteor.js. Demonstrated proficiency in software development using multiple programming languages.
- Mentored team members to develop their skills and improve their code quality. Conducted code reviews to ensure high-quality code and adherence to best practices.
- Demonstrated strong problem-solving skills by developing innovative solutions to complex technical challenges.
Technologies: React, Webpack, Django, Python, Bootstrap, Meteor, CSS, Less, JavaScript, Web, Create React App, Next.js, HTML5, Front-end, REST APIs, Web Development, GitHub, Design, Websites, Web Design, Git, CSS3, Responsive Web Design (RWD), Express.js, APIs, Responsive Design, Cross-browser Compatibility
Full Stack Engineer | Product Designer
2013 - 2017
Webline Masters
- Launched and maintained more than 20 websites, resulting in increased revenue and customer satisfaction for clients. All websites were created using Django, Bootstrap, jQuery, Less Preprocessor, and Sketch as a design tool.
- Collaborated with clients to understand their specific needs and requirements, ensuring that all deliverables met their expectations.
- Demonstrated proficiency in visual design principles, resulting in visually appealing and user-friendly websites and applications.
- Optimized website performance and speed through efficient coding practices.
- Achieved high client satisfaction rates through timely delivery of quality work and exceptional customer service.
Technologies: HTML, CSS, jQuery, Bootstrap, Django, Python, Less, JavaScript, Web, Create React App, HTML5, Front-end, REST APIs, Web Development, Design, Websites, Web Design, Git, CSS3, Responsive Web Design (RWD), Express.js, APIs, Responsive Design, Cross-browser Compatibility
Experience
Daily Symptoms Check Platform
https://www.truecare24.com/wellnessThis excellent application, with extensive features and hundreds of thousands of users, enables employers to monitor their employees' health. It is in high demand in the USA and has helped numerous businesses sustain their operations during the pandemic.
Attendance and At Risk Program
https://www.truecare24.com/attendance-and-at-risk-program/An application created for the convenience of parents and administrators of schools and universities facilitates monitoring students' health using various criteria, the analysis of statistical data, and establishing communication with lecturers. This application, which is presently functional, is being disseminated throughout the United States.
I took the lead in developing the entire user interface, providing oversight and guidance to a team of five responsible for programming, reviewing code, and devising the application's overall structure.
I took the lead in developing the entire user interface, providing oversight and guidance to a team of five responsible for programming, reviewing code, and devising the application's overall structure.
World of Tanks | Clan Wars Event
https://worldoftanks.eu/en/clanwars/I was involved in creating an advertising landing page for the Clan Wars event in the popular game World of Tanks. The landing page provided extensive statistics for the event and generated a significant number of daily views.
I contributed to developing the design, functionality, and layout of the advertising landing page.
I contributed to developing the design, functionality, and layout of the advertising landing page.
CISIS FMT
https://cisis-fmt.ru/I was a member of the team developing a system to identify and manage laboratory samples for CISIS FMT, a testing and certifying center affiliated with Lomonosov Moscow State University.
The system was developed using React for the front end and Django for the back end.
The system was developed using React for the front end and Django for the back end.
to.expert
to.expert is a large-scale React and Meteor-based application designed to facilitate interactions with insurance and car maintenance providers across Russia.
I led the development of the entire UX and UI for the platform, serving as the lead product designer and chief front end.
I led the development of the entire UX and UI for the platform, serving as the lead product designer and chief front end.
Kuban Online
https://kuban-online.ru/I worked on a legacy project related to a government website that facilitates scheduling doctor visits in free hospitals located in Saint Petersburg and Krasnodar territories throughout Russia.
As part of this project, my responsibilities included improving, correcting, and modifying the existing website, which was built using jQuery and a legacy system.
As part of this project, my responsibilities included improving, correcting, and modifying the existing website, which was built using jQuery and a legacy system.
Education
2010 - 2015
Master's Degree in Education
Adyghe State University - Maykop, Adygea Republic, Russian Federation
2010 - 2015
Master's Degree in Mathematics and Computer Science
Adyghe State University - Maykop, Adygea Republic, Russian Federation
Certifications
APRIL 2021 - PRESENT
HIPAA Compliance Training
Accountable HQ, Inc.
Skills
Libraries/APIs
React, React Redux, jQuery, Node.js, Emotion Library, REST APIs, Context API
Tools
Figma, Webpack, Create React App, GitHub, Git, Telegraf, Sketch, Photoshop CC, Axure RP Pro, Prisma
Languages
TypeScript, PHP, JavaScript, CSS, Less, HTML, HTML5, CSS3, Python, Sass
Frameworks
Recoil, Next.js, Material UI, Redux, Express.js, GrammY, Django, Jest, Bootstrap
Paradigms
Responsive Web Design (RWD), REST, HIPAA Compliance
Platforms
Web, Vercel, Docker, Meteor
Storage
MySQL, Redis
Industry Expertise
Web Design
Other
Styled-components, Front-end, Web Development, Websites, Storybook, APIs, Responsive Design, Cross-browser Compatibility, Telegram Bots, Bots, CI/CD Pipelines, Charts, Fetch API, Design
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