
Aleksei Laud
Verified Expert in Engineering
Software Engineer and Developer
Coimbra, Portugal
Toptal member since March 25, 2026
Aleksei is a senior full-stack engineer with 10+ years of experience building complex, high-performance web applications. He has worked on large-scale platforms with millions of users and developed advanced interactive products, including editors and real-time systems. Aleksei focuses on clean architecture, performance, and delivering production-ready solutions end-to-end.
Portfolio
Experience
- JavaScript - 10 years
- Front-end Development - 10 years
- Node.js - 9 years
- React - 8 years
- Full-stack Development - 8 years
- TypeScript - 8 years
- Performance - 6 years
- SQL - 5 years
Preferred Environment
Linux, Node.js, TypeScript, JavaScript
The most amazing...
...thing I've developed is a real-time in-browser fluid physics simulation.
Work Experience
Senior Full-stack Developer
YouGile
- Delivered end-to-end collaboration features for chats and group messaging, including invite flows, personal chats, reactions, unread counters, and message-forwarding scenarios.
- Improved lazy loading, sync, search, and caching flows to keep large workspaces responsive and data consistent across the product.
- Developed QR-code authentication and refined login, registration, and onboarding flows across the web client and desktop experience.
- Shipped reporting and Gantt improvements, including dashboard behavior, exports, analytics instrumentation, and usability updates for planning workflows.
- Adapted core product flows for self-hosted and standalone deployments, adding feature gating and environment-specific behavior where required.
- Strengthened messenger permissions and access logic, reducing edge-case failures in chat settings, invite links, membership updates, and profile-driven chat state.
Senior Software Engineer
Visme
- Drove canvas navigation, interaction handling, and shared UI state improvements that made complex projects easier to build and maintain.
- Led granular locking and permission-aware editing, enabling safer work on grouped, nested, and branded content.
- Built the Page Creator and mobile foundations required to generate, sync, and edit desktop and mobile project variants.
- Hardened synchronization, regeneration, and state recovery to reduce breakage in collaborative sessions.
- Improved copy/paste fidelity, list handling, selection behavior, and style preservation to make editing more predictable.
- Unified object, slide, and settings models across editor and player, reducing inconsistencies and simplifying feature delivery.
- Shipped product capabilities that required coordinated changes across player experiences, publishing flows, API contracts, bootstrap data, and migrations.
Senior Front-end Developer
Leroy Merlin
- Built a UI for an internal product-to-service management tool used by business teams.
- Set up CI/CD pipelines with automated testing and improved release processes.
- Collaborated with design and QA teams to ensure consistent and high-quality UX.
Senior/Lead Front-end Developer
HeadHunter Group
- Developed and maintained a UI for hh.ru and talantix.ru with millions of active users.
- Improved development processes and worked closely with product and design teams.
- Built and maintained a shared UI component library using Storybook for consistency.
Experience
Presentation Editor | Visme
https://www.visme.co/The project required solving challenging UI problems and building a scalable front-end architecture in close collaboration with product and design teams.
Sandbox | Interactive Particle Simulation
https://sandbox.alekseilaud.devI developed the core simulation engine in TypeScript, implemented the particle-processing architecture, and built the UI for selecting elements, controlling time, and adjusting simulation settings.
The project includes a wide set of custom behaviors for materials such as water, sand, lava, gas, metal, fire, electricity, plants, wind, detectors, and AI-driven entities like ants and worms. I also worked on performance-related systems, including point indexing, temperature processing, lighting calculations, and state persistence, which helped make the Sandbox responsive and extensible for adding new interactive elements and mechanics.
GPU-accelerated Fluid Simulation Web App
https://fluid.alekseilaud.devAI-powered Text RPG Bot for Telegram
https://t.me/k_rpg_botEvolution Ecosystem Strategy Game (Web)
https://evolution.alekseilaud.dev/The system includes a server-authoritative architecture using Node.js and Socket.IO, ensuring consistent multiplayer synchronization and conflict resolution. On the front end, I built an interaction-heavy UI with React and TypeScript, handling adjacency-based mechanics, legal action generation, and real-time updates.
A key challenge was modeling trait interactions (predator-prey logic, defensive abilities, chained effects) in a scalable way. I implemented a modular, callback-driven rules engine that enables flexible extension of game mechanics and supports custom traits beyond the base ruleset.
Skills
Libraries/APIs
React, MobX-State-Tree (MST), Socket.IO, Node.js, MobX, API Development, OpenAI API, REST APIs, GSAP
Tools
Canvas, Jenkins, Docker Compose
Languages
TypeScript, JavaScript, CSS, SQL, SCSS, HTML, Python
Paradigms
REST, Back-end Architecture, Role-based Access Control (RBAC)
Frameworks
Redux, Express.js, Tailwind CSS, Electron
Platforms
GreenSock Animation Platform (GSAP), Linux, Docker, Vercel
Storage
PostgreSQL
Other
TanStack Query, API Integration, UI Components, Full-stack, Front-end, Front-end Development, WebSockets, Performance, OpenAI, Anthropic, AI Integration, Full-stack Development, APIs, Back-end, Back-end Development, System Design, WYSIWYG Web Builders, Minimum Viable Product (MVP), Artificial Intelligence (AI), CI/CD Pipelines, ParcelJS, Game Physics, GPU.js, Storybook, HTML Canvas, Large Language Models (LLMs), Prompt Engineering, Game Back-end, Bun, Vite
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