Antoni Silvestrovič

Antoni Silvestrovič

Senior Software Engineer in Vilnius, Lithuania

About

Software Engineer / Designer specialising in Next.js, React and TypeScript. I build and continuously improve products by combining careful planning, continuous iteration and high-quality, maintainable code.

Here are some of my favourite tech tools to work with:
- Languages: TypeScript, Swift, Golang, Rust
- UI Libraries: React.js, Svelte
- Frameworks: Next.js, Remix, SvelteKit
- State: Zustand, XState, Redux Toolkit
- DBs: PostgreSQL, Planetscale, Redis
- APIs: OpenAPI, tRPC or GraphQL
- Other favs: Supabase, Kafka, EffectTS, Bevy

Contact

Website

Work Experience

2024 — Now
Vilnius, Lithuania
  • Working at the intersection with CEO, CTO, POs, Designers and Backend Engineers to create and maintain features and products.

  • Leading a team of 5+ Frontend Engineers to build solid, maintainable and scalable monorepo codebase, which is probably the most complex project I've worked on.

  • Doing technical recruitment and interviewing.

  • Mentoring Engineers via Code Reviews, 1:1s and casual yapping.

2023 — 2024
Vilnius, Lithuania
  • Leading Front-end development team of 2-3 engineers to build solid foundation for the whole product overhaul. Pretty much everything you see in your browser was built by us.
  • Built most of CoinGate Design System which is used throughout CoinGate products, in close collaboration with design team.
  • Hiring new developers and mentoring junior developers.
  • Ensuring we achieve the best user experience while not sacrificing developer experience.
  • Working with TypeScript, Next.js, Jest, Tailwind CSS, GraphQL, React (TanStack) Query, Zustand, XState, and much more...
2022 — 2023
Vilnius
  • Leading design and engineering work for all user-facing software.
  • Working with Next.js, Prisma, tRPC, Astro, TailwindCSS, PostgreSQL and much more...
  • Mentored C++ to become TypeScript engineers.
  • Designed and implemented a brand style and logo for the company.
  • Deploying products using Google Cloud Platform (GCP) and Kubernetes configurations.
2021 — 2022
Vilnius, Lithuania

Worked with multiple clients, developing different big projects, ranging from admin panels to e-commerce platforms. This is also where I've found most Frontend Engineer friends in a single company.

I've also improved overall DX by pushing for better tooling. This includes, but is not limited to:

  • Switching MaterialUI to ChakraUI in one of the projects in under 1 month.

  • Convincing the whole FE team to shift from Redux to a hybrid approach with Zustand, React Context and Hooks.

  • Introducing React Query to the FE team and the projects I've worked on.

2021 — 2022
Vilnius, Lithuania
  • Working on various infrastructure tasks ranging from Development to Deployment and Quality Assurance.
  • Creating AI-related server configurations with Kubernetes / Helm as well as general deployment and programming tasks.
  • Re-wrote company site into a JAM-stack frontend website with Next.js, TypeScript, TailwindCSS, and NetlifyCMS
  • Tech used includes: Google Cloud Platform (GCP), Kubernetes, Docker, Nix, JavaScript/TypeScript, Next.js, TailwindCSS, NetlifyCMS, and more.
2019 — 2020
Delft, Netherlands
  • Worked with multiple clients on projects with React.js, Styled Components, Sass, AWS, Node.js, Unity 3D, and some other technologies.
  • Built and maintained numerous admin panels, dashboards, and user-facing websites.
  • Introduced Next.js, ChakraUI, and React-Query for faster frontend workflow and performance.
  • Created a deployment setup for Next.js on AWS for frontend projects.
  • Created Amazon Web Services (AWS) deployments for multiple new MVP projects.

Education

2019 — 2020
St. Andrews, UK

After dabbling in simple neural network design I decided to join this course to learn more about AI in a more structured way. This experience taught me a lot about AI and made me able to research and create my own AI with the most suitable approach.

2016 — 2019
Liverpool, UK

This was a very dense learning experience. I learned the full spectrum of things about computers, from low-level things like designing my own silicon chip and making my own audio amplifier to high-level things like data structures, game theory, neural networks, etc.

2012 — 2016
Vilnius

4-year art school study where I learned most of I know about sculpture, composition, painting, sketching, photography, design and art history.

Projects

2023

I've always liked how iOS has corner smoothing on its homepage icons, but always missed that in the front-end. This project solves this problem, by adding a small bit of JavaScript to calculate the corner-smoothed version of the element that you want to use, making it easy to make any element in your frontend application use corner smoothing.

2022

Inspired by a meme, I created this random excuse generator which generated an excuse for not attending something via 3 part structure. Try it out to get the reason for not attending that party you don't want to go to!

2021

React hook that simplifies management of GDPR consent for JavaScript/TypeScript developers. This is something that I needed myself, and from the attention it's getting I see that I'm not alone. It's still in development, but with v1 release, it will cover all possible developer needs, including support for Vue, Svelte, and others.

2020

This swift package allows adding a nice-looking tooltip to your SwiftUI app with one line of code. Can't come up with a simpler solution!

2020

A compiler that transforms SVG code into SwiftUI Shape structure. It allows converting SVG icons to Swift code to display in a SwiftUI app.

2020

This app lets users create polyrhythms with ease while also functioning as a regular metronome. It features an integrated tuner for the user to have the only two things they need to practice.

Side Projects

2023

A software development company I created for bigger projects.

Volunteering

2020 — 2020
St. Andrews

Hosted an introductory course to Web Development for students from other departments who want to get into coding.

2019 — 2019
Teaching Assistant at St. Andrews University
St. Andrews

Volunteered to be a lab teaching assistant for a JavaScript course at the St. Andrews University.

Certifications

2022

Credential ID 12c0ee1c-c6a2-4896-9496-30f76ab67286