GL
gervickaslabs

Welliton
Gervickas

Software engineer building modern web applications with TypeScript, React/Next.js, Node.js, cloud infrastructure, and AI.

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Available for new projects
Welliton Gervickas

01 — Introduction

13+

Years of experience

3

Continents served

45+

Technologies

10+

Projects shipped

About

I'm a full-stack software engineer with over 13 years of experience building modern web applications. I work across the entire stack — designing clean UIs, architecting APIs, integrating third-party services, and shipping production infrastructure.

I specialize in TypeScript ecosystems — React/Next.js on the frontend, Node.js/NestJS on the backend — with hands-on experience across cloud platforms (AWS, GCP), real-time APIs, AI/LLM integrations, and blockchain development.

Passionate about end-to-end solutions from UI development to API design, integrations, automated testing, CI/CD, AI, LLMs, and performance monitoring. Currently based in the Utrecht Area (Netherlands), working remotely with clients across the Americas, Europe, and Asia through GervickasLabs.

TypeScriptReactNext.jsNode.jsGraphQLDockerAI / LLMAWS / GCP

Experience

Delivering web, AI System, and blockchain solutions — from headless CMS and smart-contract integrations to real-time APIs, DevOps pipelines, performance monitoring, and AI/LLM features. Completed 10+ projects for clients across the Americas, Europe, and Asia.

  • —Design and implement modern frontend applications using TypeScript, React, Next.js, TailwindCSS, and component-driven architectures.
  • —Build robust backend services and APIs using Node.js, Express, REST, GraphQL (Apollo), MongoDB, Redis, and cloud platforms such as AWS, GCP, and DigitalOcean.
  • —Develop and integrate Solidity smart contracts and on-chain logic using Hardhat, Foundry, Viem, Chainlink, The Graph, LayerZero, Thirdweb, Moralis, and wallet/auth solutions like Web3Auth and Coinbase.
  • —Implement real-time features and event-driven flows using WebSockets, webhooks, and background jobs.
  • —Integrate payments and subscriptions with platforms like Stripe and Coinbase Commerce.
  • —Set up and maintain CI/CD pipelines, observability, and performance monitoring across multiple environments.
  • —Collaborate with clients to define product requirements, design UX flows, and iteratively ship improvements based on feedback and usage.
TypeScriptReactNext.jsNode.jsNest.jsGraphQLWebSocketDockerKubernetesAWSGCPTerraformMongoDBPostgreSQLRedisContentfulPayloadCMSTailwind CSSShadcnSolidityHardhatWagmiViemThe GraphLayerZeroBlockchainLLMMCPRustStripeCoinbaseAI

Integrated and optimized headless CMS platforms for CIBC, Teneo, and AirStart — building scalable, responsive UIs that boosted content delivery speed and ensured smooth multi-device experiences.

  • —Integrated and customized headless CMS solutions (e.g., WordPress, Contentful-style setups) to support scalable content operations.
  • —Translated high-fidelity designs from Figma into production-ready components using Vue.js, TailwindCSS, and reusable design patterns.
  • —Collaborated with designers, product managers, and backend teams to refine UX, improve content workflows, and streamline deployment.
Vue.jsTailwindCSSFigmaCMSTypeScriptWordpressPHP

Front-end development from customer and partner portals to back-office tools and new integrations.

  • —Implemented new features and maintained existing experiences with strong focus on usability, consistency, and accessibility.
  • —Worked within TDD and DDD practices to improve code quality, test coverage, and maintainability.
  • —Collaborated closely with designers and backend engineers to define API contracts and deliver cohesive user journeys.
ReactTDDDDDCSSJavaScript

Portfolio

Selected Work

Full-Stack / Web32024

Nautt Finance ↗

Dashboard development and Web3Auth integration with Account Abstraction and Smart Accounts. Multiple domain integrations and app capabilities to handle granular role system.

Web3AuthNext.jsTypeScriptAccount AbstractionRust
Full-Stack / AI2024

PolyFund ↗

Fundraising platform with AI-enabled workflows and crypto rails.

Next.jsAICryptoTypeScript
Blockchain / DeFi2024

Perfect Pool ↗

Leading frontend architecture and UI development for a prediction market protocol, integrating smart contract interactions through Wagmi and Viem. Built real-time dashboards with GraphQL subscriptions and WebSockets.

WagmiViemGraphQLWebSocketsNext.js
Full-Stack / CMS2024

Modular Crypto ↗

Content management system using PayloadCMS, automating third-party content synchronization across Substack, Zora, YouTube, and Spotify. Designed a scalable membership system with subscriptions, RESTful APIs, and background job processing.

PayloadCMSNext.jsREST APIServerless

Open Source / Research

Lab Projects

Desktop / Dev Tooling2024

tauri-forge ↗

App development quick start using Tauri, Rust, Next.js, TailwindCSS, and Shadcn. Opinionated scaffold for building cross-platform desktop apps with a modern web frontend.

TauriRustNext.jsTailwindCSSShadcn
AI / Agents2024

knowstack ↗

Local AI shared context for agents, skills, commands, memory and docs. Enables knowledge sharing across AI agent sessions with a structured memory layer and MCP-compatible tooling.

TypeScriptMCPLLMNode.js
Dev Tooling2024

rezoomer ↗

Developer utility tool for fast prototyping and workflow automation.

TypeScriptNode.js

Full Stack

Frontend

TypeScriptReactNext.jsVue.jsTailwindCSSGraphQL (Apollo)Framer MotionShadcn/UIStorybook

Backend

Node.jsNestJSExpressWebSocketsREST APIGraphQLRedisMongoDBPostgreSQLMySQLStripe

AI / LLM

LLMMCPServerless AIPrompt EngineeringAI Agents

Get in touch

Let's build something together.

Available for freelance projects, contract work, and long-term engagements. Whether you're building a web app, blockchain protocol, or AI product — let's talk.

wellitogervickas@gmail.com