Victor Mosquera
Available for hire

Hey, I'm Victor Mosquera

+6 years of experience. Full stack Web & Web3 development. From Medellin, Colombia 🇨🇴. Determined in building robust and scalable applications.

Work experience

  1. •

    Backend Developer — Puntos Colombia (PCO)

    XpertGroup · Colombia

    • ▫️ Backend developer on Puntos Colombia's loyalty and digital-wallet ecosystem, building hexagonal-architecture / DDD microservices on AWS — 400+ commits and 250+ merged pull requests across 9 repositories.
    • ▫️ Designed and built the users microservice (Fastify 5, TypeScript, Awilix DI, Prisma/PostgreSQL, DynamoDB) using hexagonal architecture, DDD, and CQRS-style query/command use cases.
    • ▫️ Migrated functionality from a monolith and legacy Lambdas into microservices: authentication, login, session management, logout, user unlinking, sale orders, travel products, device limits, and basic user info.
    • ▫️ Integrated AWS Cognito for login and token revocation, with multi-account access through STS role assumption.
    • ▫️ Built user segmentation backed by MLOps models and a product recommendations endpoint, both configured through AWS SSM Parameter Store.
    • ▫️ Integrated external partners: Marketplace (sale orders), a travel API, Adjoe (gamification payouts), Bancolombia (account linking), and POS services with OAuth tokens.
    • ▫️ Hardened security with request signature validation, XSRF handling, encryption through a corporate crypto library, sensitive-data masking in logs, and JWT-based guards so users can't act on other users' data.
    • ▫️ Delivered digital-wallet features in NestJS: invoice updates with payment reminders, monthly approved payments, insufficient-points validation, payment-source deletion, and Wompi/Bancolombia Pay integrations.
    • ▫️ Standardized request validation with class-validator and 422 responses across every endpoint in the wallet services.
    • ▫️ Migrated 10+ AWS Lambda functions from CommonJS to ES Modules and Node.js 22, moved their tests from Jest to Vitest, and contributed to the API Gateway v2 migration.
    • ▫️ Improved observability and reliability with request tracing, a memory-usage endpoint, a cached DB health check, retry utilities, and fixed DI lifecycle issues.
    • ▫️ Managed dev/QA/production configuration in AWS SSM Parameter Store with the Serverless Framework, and used SQS and EventBridge for async communication between services.
    • ▫️ Set up local dev environments with Docker Compose and LocalStack to emulate AWS services.
    • ▫️ Documented APIs with OpenAPI/Swagger, wrote unit tests with Vitest, and shipped through Azure DevOps CI/CD following Gitflow.
  2. •

    Web3 and Fullstack Developer

    Evolution Systems B.V.

    • ▫️ Developed a decentralized application for exchanging CSC tokens from the XRPL blockchain to other blockchains (XRP, ETH, BSC, SOLANA, AVAX) with an admin panel for statistics, transactions, bridge status, and users. Included a public API with an API gateway and a microservices system to handle each blockchain separately.
    • ▫️ Built a PWA for exchanging, buying, and selling NFTs on various XRPL network marketplaces, with an admin back-office for transaction verification, process management, offers, and payments.
    • ▫️ Created a P2P betting PWA on XRP Ledger and Solana integrated with a Telegram Bot and MiniApp, with an admin panel for payment verification, user transactions, and statistics.
    • ▫️ Contributed to the development of a decentralized poker application and APIs for CasinoCoin using Xumm, along with an admin back-office for user and operational management.
    • ▫️ Participated in a location-based tracking application for potentially infected and confirmed COVID-19 cases.
    • ▫️ Developed an online roulette game interface (frontend and backend) for Cammegh.
    • ▫️ Installed and maintained Linux server services.
    • ▫️ Supported the development and maintenance of a desktop and mobile wallet for Casinocoin and Crazy8Token.
    • ▫️ Built an internal project management library with an admin panel for user and transaction verification.
    • ▫️ Developed a PWA using CasinoCoin blockchain to verify and store casino spins and bets in real-time on XRP Ledger (TrustTracker™).
    • ▫️ Provided software development, research, support, bug fixing, and API documentation using Swagger.

Projects

PontiX - Bridge currency exchange

PontiX - Bridge currency exchange

  • Angular
  • NestJS icon Nestjs
  • Web3
  • XRPL
  • Solana
Dapp that serves as a bridge for the exchange of cryptocurrencies such as XRP, ETH, BSC, SOLANA, AVAX, among others
Non Fungible - Non Fungible NFT Viewer

Non Fungible - Non Fungible NFT Viewer

  • Ionic
  • NestJS icon Nestjs
  • XRPL
  • Angular
Non Fungible (NF) is a Xaman xApp to manage and interact with all aspects of XRP Ledger NFTs issued via the XLS-20 standard, regardless of issuer or marketplace.
p2pbet - Friendly peer-to-peer bets on the XRPL

p2pbet - Friendly peer-to-peer bets on the XRPL

  • Ionic
  • Telegram
  • NestJS icon Nestjs
  • XRPL
  • Solana
  • Solana Pay
Xaman Interactive xApp for betting, peer to peer on the XRPL blockchain, with a Telegram bot and MiniApp.
CasinoCoin Lobby

CasinoCoin Lobby

  • Ionic
  • NestJS icon Nestjs
  • XRPL
Xapp where users can join regulated gambling sites, almost instant deposits and withdrawals and exclusive offers.
NFT Marketplace

NFT Marketplace

  • Next.js
  • Foundry
  • Wagmi
  • Viem
  • Rainbowkit
  • Tailwind CSS
This is a full-stack NFT marketplace project that includes smart contracts, a decentralized application (dApp), and an event indexer for a complete and efficient user experience.
Stable Coin

Stable Coin

  • Next.js
  • Foundry
  • Wagmi
  • Viem
  • Rainbowkit
  • Tailwind CSS
This project is a full-stack decentralized finance (DeFi) application for a stablecoin. It features a robust smart contract backend built with Foundry for a decentralized stablecoin (DSC) and a modern Next.js frontend for user interaction.
Multisig Wallet

Multisig Wallet

  • Next.js
  • Foundry
  • Wagmi
  • Viem
  • AppKit
  • Tailwind CSS
A Decentralized application for managing ERC20 tokens through a secure multisignature wallet.
Time-Lock Vault

Time-Lock Vault

  • Next.js
  • Foundry
  • Wagmi
  • Viem
  • AppKit
  • Tailwind CSS
A decentralized application (dApp) for locking CELO and ERC-20 tokens in a time-locked vault on the Celo blockchain.
T-sender

T-sender

  • Next.js
  • Foundry
  • Wagmi
  • Viem
  • Rainbowkit
  • Tailwind CSS
T-Sender UI is the frontend for the T-Sender Smart Contract, a tool designed for efficiently sending ERC20 tokens to multiple addresses in a single transaction (airdrop).
Buy Me Coffee

Buy Me Coffee

  • React
  • Viem
  • Tailwind CSS
  • EIP-6963
A modern full-stack application built with React Router, TypeScript, and modern development tools, designed to implement a "Buy Me a Coffee" DApp.

About Me

My name is Victor Mosquera. I'm a passionate, results-driven developer with 6+ years of experience designing, developing, and optimizing web and web3 applications, applying hexagonal architecture, DDD, and Spec-Driven Development (SDD) to ship clean, well-tested, production-ready code. Open to challenging projects that leverage my end-to-end development capabilities and foster growth .

Enthusiast about blockchain integration, decentralized applications (dApps), and the growing world of data science and generative AI models — currently deepening my skills in AI Engineering and LLM integration. I'm looking for innovative projects that combine full-stack development, Web3, and AI, where I can put my end-to-end and Web3 skills to work.

Victor Mosquera's portrait