Yerlan is available for hire
Hire YerlanYerlan Temir
Verified Expert in Engineering
Front-end Developer
Almaty, Almaty Province, Kazakhstan
Toptal member since May 4, 2022
Bio
Yerlan is a talented full-stack engineer with front- and back-end project experience. He has four years of experience in software engineering, using React and Node.js with TypeScript to build web applications. Besides being proficient in different technologies, programming languages, and frameworks, Yerlan has experience leading teams and conducting code and design reviews. He always strives to provide high-quality solutions, driving business value while complying with code best practices.
Portfolio
Liven Pty Ltd
Styled-components, TypeScript, React, GraphQL, PostgreSQL, Hasura, Relay...
Alabs.Team
JavaScript, React, HTML, CSS, TypeScript, GraphQL, Antd, Webpack, Redux...
Yandex
JavaScript, React, HTML, CSS, Node.js, Gulp, TypeScript, Redux, Webpack...
Experience
- React - 4 years
- Node.js - 4 years
- JavaScript - 3 years
- Next.js - 2 years
- GraphQL - 2 years
- TypeScript - 2 years
- Redux - 2 years
- Tailwind CSS - 1 year
Availability
Part-time
Preferred Environment
JavaScript, TypeScript, React, Node.js, CSS, HTML, Tailwind CSS, Styled-components, Django, Next.js
The most amazing...
...project I've implemented included core functionalities of a content-sharing platform with React and Node.js that helped to raise a $100,000 investment.
Work Experience
Full-stack Developer
2022 - 2023
Liven Pty Ltd
- Engineered the analytics page from front to back, enabling users to track vital metrics such as page impressions and CTA clicks. This improved data transparency for over 1,000 users.
- Sustained three essential apps over 12 months by addressing bugs, refactoring legacy code, and introducing new features: nomnie.com's Vue client app, app.nomnie.com's React website builder, and a back-end application.
- Demonstrated initiative by devising prompt and precise system design solutions for a complex system involving 70+ database tables, reducing system complexity and improving maintenance efficiency.
- Enhanced the performance of app.nomnie.com by reducing page load time by approximately 20% through meticulous inspection and optimization of function calls and server requests.
Technologies: Styled-components, TypeScript, React, GraphQL, PostgreSQL, Hasura, Relay, Python 3, Django, Vue, Front-end, REST APIs, Jira, Zoom, Mocha, Jest, Git, JavaScript Testing, Amazon Web Services (AWS), Amazon Simple Queue Service (SQS), AWS Lambda
Front-end Developer
2021 - 2022
Alabs.Team
- Built a campaign management system for Bcc.kz using React and TypeScript. Used the Ant Design system to save time and money for the business. Suggested and created dashboards with recharts for analyzing campaign executions.
- Provided support to back-end engineers with the database and API design. Reviewed designs and provided feedback to improve UX solutions.
- Decoupled tasks for sprint and estimated project deadlines. Conducted code reviews and provided mentorship to junior developers.
- Wrote end-to-end and unit tests with Cypress.io, Mocha, and Jest. Set up CI/CD pipelines on GitLab.
- Achieved high-performance velocity with the Scrum and Agile methodology, weekly using the Atlassian stack with Jira and Confluence.
Technologies: JavaScript, React, HTML, CSS, TypeScript, GraphQL, Antd, Webpack, Redux, React Router, Tailwind CSS, HTML5, Material UI, Authentication, User Authentication, JSX, React Redux, User Interface (UI), CI/CD Pipelines, Cypress, Figma, Styled-components, Front-end, REST APIs, Ant Design, Jira, Zoom, Mocha, Jest, Git, JavaScript Testing
Front-end Developer
2021 - 2021
Yandex
- Improved a browser used by approximately 12 million users daily by fixing bugs and optimizing existing functionality.
- Suggested and implemented the solution to deal with a flaky test by re-running them one by one, which decreased build failure at CI by 50%.
- Implemented Gulp tasks to speed up builds and development processes.
- Progressed to a middle-level position after the internship.
Technologies: JavaScript, React, HTML, CSS, Node.js, Gulp, TypeScript, Redux, Webpack, React Router, HTML5, JSX, React Redux, User Interface (UI), CI/CD Pipelines, Figma, Styled-components, Front-end, REST APIs, Jira, Mocha, Jest, Git, Mobile First, JavaScript Testing, Express.js
Front-end Developer
2020 - 2021
Alabs.Team
- Developed a website with React and TypeScript for one of Kazakhstan's biggest mobile network operators. Implemented eShop-related functionalities, such as buying, reserving, changing the number, etc.
- Made the website accessible for different devices, such as screen readers and keyboards with headless UI and React Aria. Handled the website localization in three languages: Kazakh, Russian, and English with i18n.
- Reviewed designs and provided feedback to improve UI and UX solutions.
- Worked with the Atlassian stack to track the working progress using Jira and Confluence.
Technologies: JavaScript, React, TypeScript, Next.js, HTML, CSS, GraphQL, REST, Webpack, React Router, HTML5, Authentication, User Authentication, JSX, User Interface (UI), Styled-components, Front-end, REST APIs, Ant Design, Jira, Zoom, Mocha, Jest, Git, Mobile First, JavaScript Testing, Search Engine Optimization (SEO)
Full-stack Developer
2020 - 2020
Galaxis
- Collaborated with designers and implemented pixel-perfect reusable UI components on React.
- Developed a GraphQL API using a high-quality API system design with Node.js and the Apollo server.
- Maintained code quality via scrupulous code reviews on GitLab.
Technologies: JavaScript, React, Next.js, GraphQL, React Apollo, Apollo Server, HTML, CSS, HTML5, Authentication, User Authentication, JSX, User Interface (UI), Node.js, Full-stack, Front-end, REST APIs, Jira, Zoom, Git, JavaScript Testing, Express.js
Software Engineer
2019 - 2020
Kaspi Bank JSC
- Built the prototype and tested speaker verification (SV), text-independent speaker verification (TI-SV), and text-dependent speaker verification (TD-SV) systems.
- Developed APIs for a face recognition system to test and qualify images.
- Implemented internal tools to speed up development and research processes.
Technologies: JavaScript, Python, Kaldi, Speech to Text, Flask, HTML5, Front-end, REST APIs, Jira, Zoom, Git
Experience
Tele2 | Altel
A React-based web app for one of the biggest telecom companies in Kazakhstan with approximately seven million clients. I was the front-end developer who implemented and integrated eShop-related functionalities such as buying, reserving, changing the number, and more.
Logizi
React-based web application for eCommerce to solve logistics problems in Kazakhstan.
Developed two different front-end modules with shared custom UI components:
1. Landing and test functionality for users
2. Admin panel for managing orders
Developed two different front-end modules with shared custom UI components:
1. Landing and test functionality for users
2. Admin panel for managing orders
Yandex Browser
https://browser.yandex.kz/This is one of the most popular browsers in the CIS region, used by around 12 million users daily. I was a front-end developer (intern, then got a full-time offer) in the core front-end team. I developed internal tools to speed up the development process, fixed bugs, and optimized browser blurring.
Galaxis
Galaxis is a content-sharing YouTube-like platform.
On this project, I was a full-stack developer working with Node.js and React. My work included implementing core features like video uploads, commenting, liking, and more, which helped the startup raise a $100,000 investment. I also reviewed the code of other developers.
On this project, I was a full-stack developer working with Node.js and React. My work included implementing core features like video uploads, commenting, liking, and more, which helped the startup raise a $100,000 investment. I also reviewed the code of other developers.
SDUDent Telegram Bot
The Telegram Bot notifies students about their new grades and has the functionality to find out students' courses and full names based on their pictures. It was accessed by 500 daily users at its peak. Used the following tech stack: Python, Telegram Bot API, and MongoDB.
Campaign Management System
For the site, Bcc.kz, I built a React-based web application to manage their campaigns.
My role in this project was as a lead front-end developer, and I implemented all the core features and divided them by roles. I also created dashboards to visualize data about campaign executions and failures. In addition, I covered the code with E2E tests and integrated them into CI/CD pipelines; I also reviewed code and mentored junior developers. I also actively communicated with the back-end team and discussed database and API designs. On a final note, I achieved a high level of code cleanliness by using TypeScript in combination with a feature-sliced methodology.
My role in this project was as a lead front-end developer, and I implemented all the core features and divided them by roles. I also created dashboards to visualize data about campaign executions and failures. In addition, I covered the code with E2E tests and integrated them into CI/CD pipelines; I also reviewed code and mentored junior developers. I also actively communicated with the back-end team and discussed database and API designs. On a final note, I achieved a high level of code cleanliness by using TypeScript in combination with a feature-sliced methodology.
Kaz Azot
Kaz Azot is a system to track reports about ecological releases and material consumption from companies in Kazakhstan.
I worked as a full-stack developer on this project and used React for the front end and Node.js for the back end. I created a full-featured front end with three different roles and permissions. I also designed the database relations and REST API endpoints.
I worked as a full-stack developer on this project and used React for the front end and Node.js for the back end. I created a full-featured front end with three different roles and permissions. I also designed the database relations and REST API endpoints.
Vimracing.io
A JavaScript-based full-stack web application that lets you compete on code refactoring speed by using Vim hotkeys. It's my nonprofit pet project for learning and testing interesting/hyped stuff like GPT API, animations, etc.
Education
2017 - 2021
Bachelor's Degree in Computer Science
Suleyman Demirel University - Almaty, Kazakhstan
Skills
Libraries/APIs
React, Node.js, Antd, React Redux, REST APIs, React Router, Vue, Socket.IO
Tools
JSX, JavaScript Testing, Git, Mocha, Figma, Jira, Zoom, Kaldi, React Apollo, Gulp, Webpack, Sequelize, CodeMirror, Amazon Simple Queue Service (SQS), Whisper
Languages
JavaScript, TypeScript, CSS, HTML, HTML5, Python, GraphQL, Python 3
Frameworks
Tailwind CSS, Next.js, Redux, Material UI, Cypress, Ant Design, Jest, Express.js, Flask, Relay, Django
Paradigms
REST, Search Engine Optimization (SEO)
Storage
PostgreSQL, MongoDB, Hasura
Platforms
Amazon Web Services (AWS), AWS Lambda
Other
Authentication, User Authentication, User Interface (UI), Styled-components, Algorithms, CI/CD Pipelines, Front-end, Middleware, Mobile First, Speech to Text, Apollo Server, Full-stack, WebSockets
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