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Andrius Kosuba
Verified Expert in Engineering
Full-stack Developer
Vilnius, Vilnius County, Lithuania
Toptal member since February 3, 2022
Bio
Andrius is a full-stack developer with experience in working with multinational teams. He specializes in front-end development and uses React as a front-end library, but he also has vast experience and knowledge in working with the back end. As a person who enjoys learning new tech stacks, Andrius thrives in the field of management and recruitment while following the Scrum methodology.
Portfolio
Axiology
Blockchain, React, Express.js, Node.js, Azure, React Query, Cloudflare...
Super How
HTML, Development, CSS, HTML5, JSX, JavaScript, React, IPFS, Web3.js...
Carousell
Blockchain, Web3.js, Ethers.js, React, Next.js, Redux, MetaMask, Chart.js...
Experience
- React - 5 years
- Redux - 5 years
- React Redux - 5 years
- Blockchain - 2 years
- Next.js - 2 years
- TypeScript - 2 years
- Web3.js - 1 year
- Node.js - 1 year
Preferred Environment
Windows
The most amazing...
...thing I've implemented is the complex delivery ordering form consisting of multiple subforms and a map showing live data and couriers.
Work Experience
CTO
2024 - PRESENT
Axiology
- Developed an MVP for the DLT Pilot Regime regulation by the European Securities and Markets Authority (ESMA).
- Managed a team consisting of five to eight engineers. Wrote the front end for the product.
- Received a €2 million investment from VCs and angel investors. Executed experiments for the ECB and other central banks in various countries worldwide.
Technologies: Blockchain, React, Express.js, Node.js, Azure, React Query, Cloudflare, UI Design, JSON
Technical Lead
2022 - PRESENT
Super How
- Developed an app for NFT minting with integration to OpenSea.
- Used Next.js for fast load times and excellent search engine optimization (SEO).
- Communicated smart contracts and stored files in decentralized file storage (IPFS).
Technologies: HTML, Development, CSS, HTML5, JSX, JavaScript, React, IPFS, Web3.js, React Redux, Next.js, TypeScript, APIs, Front-end, Material UI, REST APIs, REST, NPM, Yarn, Yarn Workspaces, Ethers.js, Figma, Responsive UI, Full-stack, Agile Software Development, Tailwind CSS, Continuous Integration (CI), GitHub, PostgreSQL, Responsive Web Design (RWD), Responsive Web Apps, Front-end Development, User Interface (UI), Express.js, React Query, UI Design, JSON
Front-end Engineer
2022 - 2022
Carousell
- Developed a web application for the NFT marketplace for zero-knowledge rollup (ZK-rollup) L2 blockchains—Starknet and zkSync.
- Implemented a new web page design and migrated the app to Next.js.
- Oversaw the release process and did frequent updates to the app.
Technologies: Blockchain, Web3.js, Ethers.js, React, Next.js, Redux, MetaMask, Chart.js, Material UI, Continuous Integration (CI), GitHub, Responsive Web Design (RWD), Responsive Web Apps, Front-end Development, User Interface (UI), UI Design, JSON
Team Lead | Front-end Tech Lead
2021 - 2022
Ziticity
- Reimplemented the front end of the customer-facing application to enable users to manage their profile and submit new orders.
- Helped the IT department to adopt the Scrum methodology.
- Set up codebase for landing pages with headless CMS using Next.js and Storybook CMS and migrated most of the pages.
- Contributed to developing Ziticity's iOS and Android app for tracking and managing customer parcels.
Technologies: React, React Native, Next.js, JSX, HTML, HTML5, CSS, Redux, React Redux, Management, Scrum Master, TypeScript, APIs, Front-end, Material UI, REST APIs, REST, Internationalization, Yarn, Yarn Workspaces, Figma, Responsive UI, Agile Software Development, Continuous Integration (CI), GitHub, Responsive Web Design (RWD), Front-end Development, User Interface (UI), UI Design, JSON
Team Lead
2020 - 2021
Danske Bank
- Implemented new processes for a multi-team project, including software development, release, and integration.
- Managed numerous teams and held one-to-one meetings.
- Led the project in collaboration with the business side.
Technologies: Management, Process Development, IT Project Management, Front-end, NPM, Responsive UI, Agile Software Development, Continuous Integration (CI), Unit Testing, GitHub, Responsive Web Design (RWD), Responsive Web Apps, Front-end Development, User Interface (UI), UI Design, JSON
Lecturer
2017 - 2020
Vilnius University
- Set up a new course on modern web development with React.
- Held theoretical and practical lectures for the third semester of bachelor's study.
- Created and evaluated exams at the end of the course.
Technologies: JavaScript, React, JSX, HTML, HTML5, Front-end, REST APIs, REST, Responsive UI, Front-end Development, JSON
Software Engineer
2015 - 2020
Danske Bank
- Developed and launched multiple projects in pension, insurance, and investment areas.
- Implemented the Agile methodology and acted as the scrum master in several cross-border teams.
- Held technical interviews for new developers and helped grow the department.
Technologies: React, React Native, .NET Core, JSX, Node.js, HTML, HTML5, CSS, Redux, React Redux, Scrum Master, APIs, Front-end, REST APIs, REST, Internationalization, NPM, Yarn, Yarn Workspaces, Automated Testing, Responsive UI, Full-stack, Agile Software Development, Test-driven Development (TDD), Continuous Integration (CI), Storybook, Unit Testing, GitHub, Responsive Web Design (RWD), Responsive Web Apps, Front-end Development, UI Design, JSON
Junior Full-stack Developer
2013 - 2015
VISMA
- Developed a web application for Norway's educational system.
- Completed development tasks and reporting tasks in Atlassian tools.
- Learned and used the Scrum methodology for everyday activities.
Technologies: JavaScript, AngularJS, .NET, HTML, HTML5, CSS, React Redux, Scrum Master, Front-end, REST APIs, Internationalization, NPM, Responsive UI, Full-stack, Agile Software Development, Responsive Web Design (RWD), Responsive Web Apps, Front-end Development, JSON
Experience
Logistics Hub Merchant Dashboard
Ziticity was a business customer-facing app providing eco-friendly logistics services.
The dashboard allowed merchants to overview various features, including the user's personal information, pricing, and delivery areas. The app is also meant for tracking and managing orders as it displays live data on couriers, parcels, and order status.
The dashboard allowed merchants to overview various features, including the user's personal information, pricing, and delivery areas. The app is also meant for tracking and managing orders as it displays live data on couriers, parcels, and order status.
NFT Marketplace
A Next.js-based marketplace for NFTs with advanced features like NFT pools.
I was a solo front-end developer that took care of rewriting codebase in Next.js with new designs and developing new features. The site supports multiple blockchains.
I was a solo front-end developer that took care of rewriting codebase in Next.js with new designs and developing new features. The site supports multiple blockchains.
Education
2014 - 2016
Master's Degree in Computer science
Vilnius University - Vilnius, Lithuania
2010 - 2014
Bachelor's Degree in Computer Science
Vilnius University - Vilnius
Certifications
DECEMBER 2016 - DECEMBER 2018
Certified Scrum Master
Scrum Alliance
Skills
Libraries/APIs
React, React Redux, REST APIs, React Query, Web3.js, Node.js, Chart.js
Tools
JSX, NPM, Yarn Workspaces, GitHub, Figma, MetaMask
Languages
JavaScript, HTML, HTML5, CSS, TypeScript
Frameworks
Next.js, Redux, React Native, Material UI, Yarn, Tailwind CSS, AngularJS, .NET, .NET Core, Express.js
Paradigms
Agile Software Development, Responsive Web Design (RWD), REST, Unit Testing, Management, Automated Testing, Test-driven Development (TDD), Continuous Integration (CI), UI Design
Storage
JSON, PostgreSQL
Platforms
Blockchain, Azure
Other
Front-end, Responsive UI, Responsive Web Apps, Front-end Development, APIs, Internationalization, User Interface (UI), Development, Data Structures, Process Development, IT Project Management, Scrum Master, IPFS, Ethers.js, Full-stack, Non-fungible Tokens (NFT), Storybook, Cloudflare
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