Alexandru is available for hire
Hire AlexandruAlexandru Tasica
Verified Expert in Engineering
React Developer
Brașov, Brașov County, Romania
Toptal member since September 7, 2022
Bio
Alexandru is a senior React full-stack developer with over seven years of experience working as a consultant, contractor, and freelance. He is driven by the will to empower and help worldwide clients implement the needed software solutions to bring their businesses to the next level. Alexandru is a proud contributor to React and Next.js frameworks used for modern front-end development and is a tech writer at the HackerNoon tech blog, a leading resource for developers.
Portfolio
LemonMarkets
React, Next.js, TypeScript, Styled-components, Material UI, Git, Jest...
IT Teams
React, TypeScript, Next.js, Node.js, GraphQL, Koa, SCSS, Git, SonarQube, Jest...
Cognizant
React, TypeScript, JavaScript, SCSS, Material UI, UI Design, Figma, ParcelJS...
Experience
- React - 7 years
- Web UI Design - 7 years
- JavaScript - 7 years
- PHP - 6 years
- TypeScript - 5 years
- Agile - 5 years
- Next.js - 2 years
- Laravel - 2 years
Availability
Part-time
Preferred Environment
React, Next.js, Node.js, Material UI, React Query, Recoil, HTML, CSS
The most amazing...
...project I've worked on is implementing a terminal-like interface that facilitates user onboarding with an all-in-one brokerage API product.
Work Experience
Senior React Full-stack Developer
2021 - PRESENT
LemonMarkets
- Assured a smooth operation of a total of four applications, both web and mobile, by doing continuous feature development, CI/CD pipelines, close testing, and debugging of React, Next.js, and React Native code.
- Optimized their web and mobile applications by reorganizing the project structure, creating a consistent code design language, and implementing good practices for their React codebase.
- Assisted on the web and mobile application transition from an API B2C provider to a B2B2C brokerage firm. Helped to rebuild the company website and scolded the old applications that weren't in line with the new direction.
Technologies: React, Next.js, TypeScript, Styled-components, Material UI, Git, Jest, React Testing Library, GitHub Actions, Gulp, React Native, HTML, CSS, REST APIs, JSON Web Tokens (JWT), OAuth, JSX, Responsive Web Apps, GitHub, APIs
Senior React Full-stack Developer
2021 - 2021
IT Teams
- Worked with a prominent engine manufacturer struggling with decreased customer efficiency and potential revenue loss. It was due to a slow and error-prone legacy interface for customers to manage the engine fleet.
- Increased fleet management efficiency by up to 80% by creating powerful data management views for fleet managers and customer engineers.
- Ensured a five-fold speed increase by optimizing, restructuring, and rewriting the old components of the application.
- Optimized the web application architecture by implementing a modern approach and reorganizing its structure.
Technologies: React, TypeScript, Next.js, Node.js, GraphQL, Koa, SCSS, Git, SonarQube, Jest, React Testing Library, GitHub Actions, Material UI, React Query, HTML, CSS, REST APIs, JSON Web Tokens (JWT), JSX, Responsive Web Apps, GitHub, APIs
Senior React Developer
2021 - 2021
Cognizant
- Worked with a prominent insurance company with a contract management application that could not handle big insurance contracts, thus making the process slower and losing potential revenue.
- Decreased the contract creation time by up to 40% by allowing the company employees to visually create complex insurance flows based on multiple variables.
- Increased data management speed by up to 50% by creating a seamless web application that handles big data quickly.
Technologies: React, TypeScript, JavaScript, SCSS, Material UI, UI Design, Figma, ParcelJS, Git, SonarCloud, Jest, React Testing Library, Azure DevOps, HTML, CSS, REST APIs, JSON Web Tokens (JWT), JSX, Responsive Web Apps, GitHub, APIs
Senior React Developer
2020 - 2021
General Magic
- Helped the company deal with a potential loss in the desktop and laptop users marketplace due to focusing its service only on mobile users.
- Ensured a two-fold increase in user accessibility by designing and implementing the app experience into a web-based solution that allows users to check maps, plan, and see details about their upcoming trips.
- Increased the development speed by up to 50% by creating a seamless building process for web applications that outputs an optimized code for every browser and platform.
Technologies: React, TypeScript, JavaScript, SCSS, WebAssembly (Wasm), Web UI Design, Webpack, Git, RSync, REST, HTML, CSS, REST APIs, JSON Web Tokens (JWT), JSX, Responsive Web Apps, GitHub, APIs
Senior Full-stack Developer
2019 - 2021
General Magic
- Helped the company account for the impact of their solution on customer software by providing maps and navigation software.
- Defined a new target audience and increased the customer number from zero to 2,000 in three months by creating a solution for billing their customers by impact.
- Increased efficiency by 90% by designing an automated statistics system exposed through a web application.
- Ensured a 70% payment collection efficiency by designing an automated payment processing system.
Technologies: PHP, JavaScript, WebAssembly (Wasm), PostgreSQL, Composer, Bootstrap, Web UI Design, Database Architecture, REST, Git, RSync, Stripe API, Cron, HTML, CSS, REST APIs, JSON Web Tokens (JWT), Responsive Web Apps, GitHub, APIs
Senior React Developer
2017 - 2021
General Magic
- Helped the company promote its services to non-technical customers and boost sales with a custom interface.
- Opened two new target audiences—map designers and public system architects—by designing a visual style editor similar to Adobe Suite available on a web interface.
- Reduced the designing process time from three hours to fifteen minutes by replacing manual code writing and putting together a great UI/UX.
Technologies: React, TypeScript, Sass, WebAssembly (Wasm), PHP, PostgreSQL, Webpack, PostCSS, Web UI Design, Git, RSync, Linux, HTML, CSS, REST APIs, JSON Web Tokens (JWT), JSX, Responsive Web Apps, GitHub, APIs
Senior Full-stack Developer
2019 - 2020
Human Resources Platform
- Helped an HR company digitize its issuing documents process. They had multiple employees doing it manually and were dealing with revenue losses and delays in clients' access to the documents.
- Reduced the issuing documents time from four hours to fifteen minutes by designing an application that replaces the slow manual process of creating complex reports with just a few clicks.
- Led to an 80% revenue gain by allowing the existing employees to focus on multiple customers, streamlining the communication and automation process.
- Dropped the customer support time by 50% by integrating a specially designed forum application for commonly asked questions, avoiding duplicated questions.
Technologies: Laravel, PHPOffice (formerly PHPExcel), PHP, MySQL, Composer, REST, Cron, Database Design, Automated Server Deployment, Bootstrap, HTML, CSS, jQuery, REST APIs, JSON Web Tokens (JWT), Responsive Web Apps, Content Management Systems (CMS), APIs
Senior Full-stack Developer
2017 - 2018
Tempting Brands
- Worked with a branding company dealing with the costly process of manually managing the access of four international brand customers to their brand files.
- Reduced the time to manage documents by up to 90% with a custom-designed solution.
- Decreased the time to generate statistics and logs by up to 50%, displaying the information in a visual management web interface.
Technologies: PHP, PostgreSQL, JavaScript, Web UI Design, Database Architecture, REST, Git, RSync, Bootstrap, HTML, CSS, jQuery, REST APIs, Responsive Web Apps, GitHub, Content Management Systems (CMS), APIs
Experience
Lemon.markets Trading Developer Platform
http://lemon.markets/The client, an all-in-one brokerage API startup, was scaling up fast and dealing with a decreasing amount of user onboardings because they didn't have a refined web application and a straightforward user path for interacting with their product.
I worked with them to implement a terminal-like interface for users to explore each command they need to run to get started. I also reorganized its web architecture and created a consistent code design language across applications. It helped improve the onboarding flow and significantly optimize the company's web architecture.
I worked with them to implement a terminal-like interface for users to explore each command they need to run to get started. I also reorganized its web architecture and created a consistent code design language across applications. It helped improve the onboarding flow and significantly optimize the company's web architecture.
Education
2015 - 2018
Bachelor's Degree in Computer Science
Transilvania University - Brasov, Romania
Skills
Libraries/APIs
React, jQuery, REST APIs, React Query, Node.js, PHPOffice (formerly PHPExcel), Stripe API, React Testing Library
Tools
JSX, GitHub, Git, Composer, Cron, Webpack, PostCSS, Figma, SonarCloud, SonarQube, Gulp
Languages
JavaScript, TypeScript, HTML, CSS, PHP, GraphQL, Sass, SCSS
Frameworks
Material UI, Bootstrap, Next.js, JSON Web Tokens (JWT), Recoil, Laravel, Jest, Koa, React Native
Paradigms
Web UI Design, Agile, REST, Database Design, Automated Server Deployment, UI Design, Azure DevOps
Platforms
Linux
Storage
PostgreSQL, Database Architecture, MySQL
Other
Responsive Web Apps, Content Management Systems (CMS), APIs, RSync, WebAssembly (Wasm), ParcelJS, GitHub Actions, Styled-components, OAuth
Collaboration That Works
How to Work with Toptal
Toptal matches you directly with global industry experts from our network in hours—not weeks or months.
1
Share your needs
Discuss your requirements and refine your scope in a call with a Toptal domain expert.
2
Choose your talent
Get a short list of expertly matched talent within 24 hours to review, interview, and choose from.
3
Start your risk-free talent trial
Work with your chosen talent on a trial basis for up to two weeks. Pay only if you decide to hire them.
Top talent is in high demand.
Start hiring