Bakhatnur is available for hire

Bakhatnur Baityeli

Verified Expert in Engineering

Software Developer

Dubai, United Arab Emirates

Toptal member since August 18, 2022

Expertise

Algorithms Data Structures Back-end Back-end Development Caching API Integration Full-stack Development Web Development Serverless A/B Testing Encryption Cryptocurrency Full-stack Front-end User Experience (UX)Financial Software Web Scraping Shopify API Miro

Bio

Bakhatnur is a full-stack developer with over 14 years of experience in the eCommerce, crypto exchange, blockchain, healthcare, and food delivery industries. He has expertly developed and scaled various services and web applications from scratch, architecting solutions to serve millions of users. Bakhatnur is highly proficient in multiple technologies, including C#, .NET, Java, Spring Boot, Node.js, React, Next.js, JavaScript, and AWS cloud computing services.

Portfolio

My Shift Report Inc.

JavaScript, PHP, Next.js, React, Back-end Development, Amazon S3 (AWS S3), CSV...

Talabat

.NET, Apache Kafka, Kafka Streams, PostgreSQL, SQL Server 2016, AWS Lambda...

My Shift Report Inc.

MySQL, JavaScript, PHP, Next.js, Tailwind CSS, Figma, User Experience (UX)...

Experience

Java - 15 years MySQL - 10 years Python - 8 years Node.js - 6 years Spring Boot - 6 years PHP - 6 years .NET - 3 years C# - 2 years

Availability

Full-time

Preferred Environment

Java, Node.js, .NET, C#, JavaScript, Amazon Web Services (AWS), Blockchain, Shopify, React, Next.js

The most amazing...

...thing I've developed is a crypto-savings platform that allows users to earn interest on their crypto asset savings.

Work Experience

Full-stack Developer

2023 - PRESENT

My Shift Report Inc.

Developed https://www.myshiftreport.com from scratch using Next.js, Tailwind CSS, and PHP per the Figma guidelines.
Set up code repository control using Bitbucket for front-end and back-end services and JIRA for task tracking.
Added a dashboard for the nurse and shifts and a call-log dashboard to keep track of the recent callback logs.

Technologies: JavaScript, PHP, Next.js, React, Back-end Development, Amazon S3 (AWS S3), CSV, CSV File Processing, UI Frameworks, Design

Senior Software Engineer

2021 - PRESENT

Talabat

Migrated legacy microservices to the event-driven architecture using Apache Kafka, Spring Boot, and gRPC.
Implemented a service to return available restaurants within the customer's location using C#, .NET, PostgreSQL, the PostGIS library, and geospatial queries.
Implemented a service to track the delivery and provide an estimated delivery time and fee.

Technologies: .NET, Apache Kafka, Kafka Streams, PostgreSQL, SQL Server 2016, AWS Lambda, Terraform, C#, Java, Spring, Spring Boot, New Relic, CI/CD Pipelines, Microservices, gRPC, NoSQL, A/B Testing, JSON Web Tokens (JWT), JUnit, Protobuf, Kubernetes, Front-end Development, PostGIS, Databases, Database Design, C#.NET, Back-end Development, Amazon S3 (AWS S3), Go, CSV, CSV File Processing, UI Frameworks

Full-stack Developer (via Toptal)

2023 - 2024

My Shift Report Inc.

Developed shift reporting software for healthcare professionals using Next.js, React, Tailwind CSS, PHP, and Oracle back end.
Implemented the back-end service using PHP with the LAMP stack. The reactive, mobile-friendly front end is implemented using Next.js, Tailwind CSS, and React components. Implemented a login service using a JWT token and SSL certificate.
Utilized Bitbucket and Git to manage the back- and front-end repositories. Tracked the tasks using Jira.

Technologies: MySQL, JavaScript, PHP, Next.js, Tailwind CSS, Figma, User Experience (UX), User Interface (UI), Front-end Development, Encryption, Databases, Database Design, Back-end Development, Amazon S3 (AWS S3), CSV, CSV File Processing, UI Frameworks, UI Libraries, Design

Full-stack Developer

2022 - 2023

1719 Solutions Inc.

Created a test suite for the current application to make the existing service easy to upgrade, build, deploy, and monitor.
Upgraded the service with the next Shopify API version and migrated the solution from Python 2 to Python 3. Reduced the codebase to make it easy to maintain and add features.
Fixed the UI and service bugs and improved the performance.

Technologies: Python, MongoDB, Docker, Shopify API, Shopify, Serverless, Testing, Relational Databases, eCommerce, NoSQL, Next.js, Tailwind CSS, User Experience (UX), User Interface (UI), Front-end Development, Databases, Database Design, Back-end Development, CSV, CSV File Processing, UI Frameworks, UI Libraries, Design

Full-stack Developer

2018 - 2021

GOPAX

Developed user KYC and AML services using Java, Spring Boot, Node.js, and WebSocket APIs.
Built crypto-related financial services and platforms through first-hand experience in the blockchain industry. Created the GOFi platform that gives interest to fixed-term and flexible-term products.
Added new functionalities for the order-matching algorithm of the crypto exchange using Java 8.
Enhanced the exchange's overall front-end experience with React.

Technologies: Node.js, Python, Java, Spring Boot, MySQL, IntelliJ IDEA, Linux, .NET Core, Redis, JavaScript, Amazon Web Services (AWS), Algorithms, Data Structures, SQL, Amazon Elastic Container Service (ECS), Amazon Elastic Container Registry (ECR), CI/CD Pipelines, Docker, Full-stack Development, React, React Redux, REST APIs, Microservices, Spring Microservice, Caching, Financial Software, Mobile Web, Algorithmic Trading, Cryptoeconomics, Cryptocurrency, ERC-20, GitHub, Git, Jira, Miro, Vue, MongoDB, Amazon DynamoDB, Amazon Simple Queue Service (SQS), Amazon Simple Notification Service (SNS), HTML, CSS, APIs, TypeScript, Express.js, Back-end, PHP, Blockchain & Cryptocurrency, AWS CloudFormation, WebSockets, API Integration, Microsoft SQL Server, Web Development, XML, Object-oriented Programming (OOP), Serializer/Deserializer (SerDes), Full-stack, MEAN Stack, Google Maps API, Firebase, Jest, Serverless, Testing, SMS, Relational Databases, eCommerce, NoSQL, A/B Testing, JSON Web Tokens (JWT), JUnit, Figma, Fintech, Protobuf, Trading, Trading Systems, User Experience (UX), User Interface (UI), Front-end Development, Encryption, TradingView, Databases, Database Design, Back-end Development, Amazon S3 (AWS S3), CSV, Amazon CloudWatch, Ant Design, UI Libraries, Design

Senior Back-end Developer

2016 - 2018

TMON

Developed a photo review service and review moderation portal for the eCommerce platform.
Built the Today's Pick deals. Utilized various caching technologies to improve the performance as the Today's Pick deals are shown on the main page and accessed by millions of users.
Improved the performance of the service by flattening data and denormalizing by utilizing queue technologies and NoSQL databases.

Technologies: Java, Spring Boot, MySQL, IntelliJ IDEA, Linux, AWS Lambda, Redis, JavaScript, Algorithms, Data Structures, SQL, Python, CI/CD Pipelines, Full-stack Development, AngularJS, REST APIs, Microservices, Spring Microservice, Caching, Financial Software, Mobile Web, GitHub, Git, Bitbucket, Shopify API, Jira, Vue, MongoDB, Couchbase, Apache Kafka, HTML, CSS, APIs, TypeScript, Express.js, Back-end, PHP, Apache, LAMP, API Integration, Web Development, XML, Object-oriented Programming (OOP), Chrome Extensions, Testing, Web Scraping, Relational Databases, eCommerce, NoSQL, A/B Testing, JSON Web Tokens (JWT), MyBatis, JUnit, Databases, Database Design, Back-end Development, CSV, Ant Design, UI Libraries, Design

Android Developer

2008 - 2016

Samsung

Developed in-house applications for the Samsung Galaxy S series.
Contributed to the Samsung TouchWiz and SDK by implementing reusable APIs and services.
Built a Screen Mirroring solution, the first of its kind in the 2010s. It was one of the standout features of the new Galaxy S series.

Technologies: Java, Android, Android SDK, IntelliJ IDEA, Algorithms, Data Structures, Perforce, Kotlin, C, C++, APIs, REST APIs, XML, Object-oriented Programming (OOP), Relational Databases, WebRTC, Front-end Development, Encryption, Database Design

Co-founder

2005 - 2008

Massagan.com

Developed Massagan.com, one of the most popular social networks website in the Kazakh language.
Implemented everything from scratch, from back end to front end using JavaScript, PHP, MySQL, and Apache (LAMP stack).
Managed the deployment and user engagement and made strategic decisions on the product.

Technologies: Algorithms, PHP, Linux, MySQL, LAMP, Apache, REST APIs, Web Development, Full-stack Development, Full-stack, Google Maps API, Chrome Extensions, Relational Databases, User Experience (UX), User Interface (UI), Front-end Development, Encryption, Database Design

Experience

GOFi | A Blockchain-based Financial Service

https://www.gopax.co.kr/gofi?tab=my-product

GOFi offers various fixed and open-term savings products that allow customers to earn interest on their crypto asset holdings.

We distributed an interest daily for the open-term products, and for the fixed-term products, the interest would be paid along with the principal amount at the end of the term.

Order Matching Platform

https://www.gopax.co.kr

An in-memory order matching platform for the cryptocurrency exchange and the platform is a highly available, low latency software that matches the bid orders with the asks orders between the various crypto coins and fiat currencies. E.g., BTC-USD, ETH-USD, or BTC-ETH.

Korendy | Invoice and Billing Platform

http://www.korendy.com.tr

A billing and invoice generator plugin using Shopify API for Korendy.com. The application uses Shopify's admin APIs and Turkish invoice generator application and is customized for korendy.com, a leading cosmetic shopping platform.

Shift Reporting System for Healthcare Professionals

https://www.myshiftreport.com/about

A web-based software that provides a full shift reporting dashboard, emailing, and KPI tracking. The software is implemented using React, Next.js, and Tailwind CSS on the front end, as well as Oracle and LAMP stack on the back end.

Education

2006 - 2008

Master's Degree in Computer Science

Korea Advanced Institute of Science and Technology (KAIST) - Daejeon, South Korea

Skills

Libraries/APIs

Node.js, React, React Redux, REST APIs, Vue, Protobuf, Shopify API, Google Maps API, WebRTC, MyBatis, X (formerly Twitter) API

Tools

Amazon Elastic Container Service (ECS), Amazon Elastic Container Registry (ECR), IntelliJ IDEA, Git, GitHub, Perforce, Bitbucket, Jira, Miro, AWS CloudFormation, Amazon CloudWatch, Amazon Simple Queue Service (SQS), Apache, Figma, Amazon Simple Notification Service (SNS), Kafka Streams, Terraform

Languages

Java, Python, C#, JavaScript, SQL, HTML, CSS, XML, C#.NET, Go, C, C++, TypeScript, PHP, Kotlin

Frameworks

.NET, Spring Boot, Android SDK, .NET Core, AngularJS, Spring Microservice, Express.js, Next.js, JSON Web Tokens (JWT), Tailwind CSS, Ant Design, Jest, Spring, JUnit, Angular, gRPC

Paradigms

Microservices, Object-oriented Programming (OOP), Testing, Database Design, MEAN Stack

Platforms

Android, AWS Lambda, Amazon Web Services (AWS), Docker, Linux, Shopify, Kubernetes, Blockchain, Apache Kafka, Firebase, LAMP, New Relic

Storage

PostgreSQL, MySQL, Redis, MongoDB, Couchbase, Microsoft SQL Server, Relational Databases, NoSQL, PostGIS, Databases, Amazon S3 (AWS S3), Amazon DynamoDB, SQL Server 2016

Industry Expertise

Trading Systems

Other

Algorithms, Data Structures, Full-stack Development, Caching, Financial Software, Mobile Web, ERC-20, Cryptocurrency, Cryptoeconomics, APIs, Back-end, Blockchain & Cryptocurrency, WebSockets, API Integration, Web Development, Serializer/Deserializer (SerDes), Full-stack, Serverless, Web Scraping, eCommerce, A/B Testing, Front-end, Fintech, Trading, User Experience (UX), User Interface (UI), Front-end Development, Encryption, Back-end Development, CSV, CSV File Processing, CI/CD Pipelines, Algorithmic Trading, Chrome Extensions, Mobile App Development, SMS, UI Frameworks, UI Libraries, Design, Real-time Streaming, SSL, TradingView

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