Lead Full Stack Engineer (Java, React) - 28534

Posted more than 30 days ago

Specialization: Java Golang Front-End / JS Node.js PHP Python AWS Cloud Development Express.js

Open to offers now

5 000 $

Ukraine

Kyiv, Kharkiv, Lviv, Odesa, Dnipro, Chernivtsi, Poltava, Vinnytsia, Donetsk, Kryvyi Rih

More than 5 years

Advanced/Fluent

Considering options

Full-time office work

Part-time work

Remote work (full-time)

Freelance (one-time projects)

Relocate

U Raise Me Up! Nothing is impossible. It is time to Up!

I am a seasoned Senior Software Engineer with over 10 years of experience in Full-Stack development and architectural design. Proficient in designing scalable, high-performance systems and leading cross-functional teams to deliver exceptional results. Seeking opportunities to leverage expertise in developing innovative solutions and contributing to the success of dynamic software projects. Consulting basic business models, realized pixel-perfect design, implemented scalable & maintainable components with clear requirements.

Highly experienced, solutions-oriented professional in overseeing all aspects of the SDLC from extensive analysis and design through deployment and maintenance, Agile environment, DevOps and Team collaboration.

Creative, Result-Focused, Passionate & Self-Learner. Keep curious and ahead about new technologies.

Education

University of Cambridge

Bachelor

April 2011 - September 2015

Experience

Senior Java Fullstack Engineer

Fable Consortium

March 2023 - May 2024

Architect and implement scalable microservice architecture using technologies such as Docker, Kubernetes, and AWS.
Collaborate with product managers and stakeholders to define technical requirements and ensure alignment with business objectives.
Led the development of a complex web application using React.js, Redux, and TypeScript, resulting in a 30% increase in user engagement and a 20% improvement in performance.
Optimize database queries and improve overall system performance, resulting in a 20% reduction in response times.
Improved existing Java & Python RESTful APIs by adding more functionality and error handling capabilities based on Spring Boot Framework.
Implement CI/CD pipelines to automate the deployment process and streamline software delivery.
Developed RESTful APIs and backend services with Java/Python & Node.js handling millions of requests per day.
Worked closely with frontend developers to integrate backend services with React & Angular user interfaces.
Investigated and resolved complex technical issues to ensure system reliability and stability.
Design architecture for the website - Climate Neutrality China Online mitigation tool - Next.js + React.js + Tailwind CSS.
Worked with Fusioncharts, React ChartJS 2 library to analyze and visualize data for Green House Gas Emission and AFOLU World Wide.

Senior Frontend, Web3 Engineer

Mythical Games

March 2019 - March 2023

Spearheaded the development of ERP solutions, enhancing productivity, resource management, and data accuracy for clients.
Built reusable, responsive pages on frontend frameworks like Angular, React.js with Tailwind CSS, headless ui, etc.
Experience in building DApps using HTML, Java Script and Node.js and interact with Ethereum Blockchain by using web3.js/ethers.js /solana-web3 APIs and metamask.
Developing web-based applications in React.JS and storing the transactions in Ethereum Network using Solidity language.
Forking decentralized finance site on Solana network - swap implementation using Solana Web3 and Jupiter SDK, web3 integration with smart contracts on Rust language.
Experienced with NFT marketplaces, DeFi/DApp development with token protocols (ERC20, ERC21, ERC721, ERC-1155, Opensea).
Participated in Agile development processes, including sprint planning, daily stand-ups, and retrospectives.
Crafted responsive and intuitive user interfaces using React.js, delivering superior user experiences and enhanced usability.
Achieved over 90% test coverage by meticulously designing unit tests and using SonarQube with Docker to monitor code quality.
Effectively managed OracleSQL for the backend database, optimizing data storage and retrieval.
Deployed applications on GCP & Azure for high availability and cost-efficient infrastructure management.
Leveraged Java Spring/Python Django for backend development, ensuring the creation of robust, secure, and scalable applications.
Collaborated with cross-functional teams to gather requirements, plan development tasks, and ensure on-time project delivery.

Senior Software Engineer

Streamline

June 2017 - February 2019

Updated and redesigned company website, adding clean and responsive components using React on a Java & Node.js Backend (Spring Boot / Express) and Python/Django.
Built reusable, responsive components with Angular 8, Tailwind CSS, Material UI.
Worked in highly collaborative Agile team environment.
Experience in using build/deploy tools such as Jenkins, Docker and Kubernetes for Continuous Integration & Deployment for Microservices.
Performing Code Reviews and QA with the team, design reviews with the requirements.
Developed and implemented a credit scoring model that reduced default rates by 15%.Led a team that automated the loan approval process, reducing processing time by 30%.
Implemented a 'server less' architecture using API Gateway, Lambda, and Dynamo DB and deployed GCP, Azure based on FireBase.
Vast experience in building complex web user interfaces, a keen understanding of user interaction and design principles and standards.
Experienced using and creating RESTful APIs with Swagger.
Experienced and knowledged with CI/CD.
Implemented all the components following Test-Driven Development (TDD) methodology using JUnit.
Good experience with Golang drivers to perform operations such as CRUD operations and writing complex queries with PostgreSQL, MySQL, Mongodb and Redis.

Frontend Engineer

Alibaba

April 2014 - April 2017

Improved existing Java & Python RESTful APIs by adding more functionality and error handling capabilities based on Spring Framework.
Implemented all the components following Test-Driven Development (TDD) methodology using JUnit.
Lead Ecommerce product initiatives, recommend improvements, mentor and guide junior team members.
Developed the Ecommerce website using PHP, from initial concept to completion, custom coded the Shopify theme, designed and coded HTML templates.
Developed custom web application interfaces using HTML5 and CSS3 to meet the requirements of the client.
Responsible for architecting and executing solutions using JavaScript frameworks like React.js, Angular.js and Backbone.js.
Develop various screens for the front end using React.js and used various predefined components from NPM (Node Package Manager) and Redux library.
Deep understanding with object-oriented-programming languages like C++, Java, Python.
Contributed to the development of internal TIBCO integration frameworks and utilities to streamline development processes and promote code reusability.

Skills

Java - 10 years

Node.js - 8 years

JavaScript - 9 years

Typescript - 6 years

SpringBoot - 9 years

PostgreSQL/MySQL - 8 years

Cloud Development - 7 years

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