Back End Engineer (P-106)

San José
Permanente
Tiempo completo

Hace 14 días
Postúlese fácilmente

SMASH, Who we are?We are agents for tech professionals in Costa Rica and Colombia that help them build careers in the United States.We believe in long-lasting relationships with our talent. We invest time getting to know them and understanding what they seek as their professional next step.We aim to find the perfect match. As agents, we pair our talent with our US clients, not only by their technical skills but as a cultural fit. Our core competency is to find the right talent fast.We purposefully move away from the “contractor” or “outsourcing” type of relationship. Our clients don’t want contractors or “just a service.” Neither does our talent.Our Benefits

Wellness Coverage
Remote Work
Birthday day off
Recognition and rewards system
Referrals Program
Business skill coaching
English classes for Smashers and relatives
Learning opportunities

This is a remote position for Costa Rica and Colombia.
This position is Remote to work with a US Company; you will require to have Citizenship or a work permit from Costa Rica or Colombia to apply for this role. Responsibilities:

Develop backend logic using Node.js and Express.js.
Implement real-time gameplay with WebSocket/Socket.IO for multiplayer chess matches.
Build APIs for matchmaking, player stats, leaderboards, tournaments, and authentication.
Integrate backend with Ethereum smart contracts for tokens/NFT operations.
Manage database, caching, and performance optimization.

Tech Stack / Tools:

Node.js, Express.js
MongoDB, Redis
JWT (Authentication/Authorization)
Web3.js / Ethers.js (Server-side)
AWS S3 / Cloudinary (media uploads)
Bcrypt.js (secure passwords)
Nodemailer / SendGrid (emails)
Cron Jobs (Node-cron)
Ethereum (ERC-20 & ERC-721 standards), Solidity, Hardhat
Alchemy / Infura, IPFS, Pinata
OpenZeppelin Contracts

Great to Have (Third-Party APIs):

WalletConnect API – seamless wallet integration (MetaMask, Trust Wallet, etc.).
CoinGecko / CoinMarketCap API – real-time token price data.
Moralis API – blockchain indexing, authentication, and on-chain event tracking.
Firebase Cloud Messaging (FCM) – push notifications for matches and tournaments.
Sentry API – error tracking and performance monitoring.
Google OAuth / Apple Sign-In – user onboarding/authentication.
ReCAPTCHA API – bot prevention in registration/login.
Mailgun / SendGrid API – transactional email delivery.

Smash