06/17/2026 updated

**** ******** ****
100 % available

Senior Front-End Engineer

Kaunas, Lithuania
Only remote
Bachelor's degree, Computer Science
Kaunas, Lithuania
Only remote
Bachelor's degree, Computer Science

Profile attachments

LukasZilinskasCV_FS.pdf

BlockchainSmart ContractsTypeScriptWeb ApplicationsReact.jsWeb3.jsGolang
A dedicated, highly creative and conscientious Senior Software Engineer with experience in building scalable and accessible web applications. Proficient in development with React.JS, TypeScript, Golang and Smart contracts for international companies ranging from startups to large enterprises. Enjoys the challenges and working on own initiative, excellent team player with experience in leadership and personal and professional development. Exceptional
communication skills with great attention to detail.

Experience

Professional experience5 - 10 years
Freelancer since2019

Languages

EnglishNative speakerSpanishBasic knowledgeLithuanianNative speaker

Project history

Senior Full-Stack Engineer

Extrica
● Led front-end development of the science research platform and managed the full project lifecycle.
Established documentation standards for architecture decisions and developer onboarding.
● Delivered the product using Node.js, TypeScript/JavaScript, and Vite.js. The company partnered with
ResearchGate, which has 25M+ researchers.
● Implemented reusable components by translating the Figma design system and collaborating with designers
and key stakeholders.
● Created automated E2E tests using Playwright to ensure application reliability and maintainability.
● Experience with TDD (Test-Driven Development), accessibility, cross-browser compatibility, and Azure.

Personal goal pursuit

Completed previously postponed computer science degree.

Senior Full-Stack Engineer

Saakuru Labs Startup
● Developed gaming DApp using Web3.js, Ethereum.js, React.js, Typescript/JavaScript, LottieFiles, and
Node.js/Express.js. DApp contributed to the Saakaru blockchain reaching 1M monthly transactions.
● Mentored developers on front-end development best practices and led documentation initiatives.
● Rearchitected React.js application to improve scalability, performance, and maintainability.
● Shaped Web3 product vision by aligning customer needs and market solutions.
● Developed reusable components from the Figma design system using TypeScript/JavaScript and React.js.
● Reduced CI/CD pipeline build times by 50% through strategic optimizations, thereby enhancing the team’s
productivity.
● Implemented automated performance regression detection in CI/CD pipelines.
● Experience with NoSQL databases, event-driven architecture, Node.js, Next.js, and RESTful APIs.

Full-Stack Engineer

AboutYou.de

Goods & Retail

1000-5000 team member

● Reduced AWS infrastructure costs by 50% through React.js and TypeScript codebase refactoring, optimizing
cloud node usage.
● Collaborated cross-functionally with design, backend teams, and key stakeholders on feature development.
● Developed a large-scale B2C e-commerce application using React.js and TypeScript that supported 30M+
requests a month.
● Built and maintained reusable React.js components and Storybook documentation for the internal component
library, collaborating with UI/UX designers.
● Collaborated with the SEO team to resolve URL cannibalization in the React.js application, resulting in a
$1.5M revenue increase.● Migrated PHP(Laravel) B2B e-commerce large-scale application to Golang, Redis, ElasticSearch, and AWS,
supporting 300M+ monthly requests while reducing cloud costs. The process involved legacy codebase
analysis, architecture design, ticket creation, work breakdown, team mentoring, and hands-on development.
● Utilized monitoring tools for performance insights and error detection.
● Monitored the 95th and 99th percentile values to assess system performance.
● Added an automated CI/CD pipeline process to streamline team workflow.
● Experience with AWS, Datadog, NoSQL, SQL databases, and RESTful APIs.

Full-Stack Engineer

FrontIT.dk
● Collaborated with stakeholders to define and deliver new features.
● Developed reusable components using Vue.js, Typescript, and Vite.js.
● Developed PHP(Laravel) e-commerce application using Redis, ElasticSearch, GraphQL, and AWS.
● Monitored applications and optimized database queries.
● Utilized a BDD testing strategy for the application, which tests could be reviewed and confirmed by non-
technical stakeholders. Gave a talk about BDD testing strategy and success in the project.

Full-Stack Engineer

Rinkodara
● Developed software used in audio guides using TypeScript and Node.js.
● Maintained e-commerce application. Used stack: React.js and TypeScript.
● Maintained e-commerce application. Used stack: React.js, PHP(Laravel), and Lumen.
● Designed and implemented an API that powered fleet telematics and a real-time analytics platform using
React.js.
● Designed and implemented an API that powered fleet telematics and a real-time analytics platform using
React.js and Golang.

Software Engineer

● Led architectural design and development of event-driven, high-performance Java plugins and web platforms
using PHP, jQuery, MySQL, and Java.
● Established technical roadmap and release strategies, managing the full project lifecycle.
● Implemented a secure authentication system and payment gateway integration for premium features.
● Implemented monitoring solutions for real-time performance metrics and issue tracking.
● Optimized performance through efficient threading and memory management to ensure reliability and
scalability.

Contact form

Log in to get in touch

You need to be logged in to use the contact form.

Sign upLog in