Join LongHash Ventures portfolio companies

Blockchain Developer — FillX (Full-Stack / Frontend / UI-UX Designer)

Decent Land Labs

Decent Land Labs

Software Engineering, Product, Design
Remote
Posted on Feb 22, 2026
FillX is building the next-generation hybrid DEX — CEX speed meets DEX security. Powered by Orderly Network, we are creating an all-in-one trading platform with AI-powered signals, social trading, and one-click execution.

We are hiring for 3 key roles to join our founding team:

Role 1: Full-Stack Developer (Web3/DeFi)
Build and maintain our trading platform, backend APIs, and blockchain integrations.

  • Build trading platform frontend (React/Next.js) and backend APIs (Node.js/TypeScript)
  • Integrate with Orderly Network SDK for on-chain trading
  • Implement WebSocket connections for real-time market data
  • Build authentication, wallet integration, and KYC flows
Requirements: 3+ years full-stack, React/Next.js + Node.js/TypeScript, WebSocket/REST APIs, Web3/blockchain familiarity

Role 2: Frontend Developer (Trading Platform)
Create the most intuitive and beautiful DEX interface in the market.

  • Build responsive trading UI with React/Next.js + TypeScript
  • Integrate TradingView charts with custom overlays
  • Implement real-time orderbook, positions, and PnL displays
  • Build social feed, copy trading dashboard, and leaderboard
Requirements: 3+ years frontend, Expert React/Next.js + TypeScript, TradingView experience preferred, WebSocket, pixel-perfect CSS/Tailwind

Role 3: UI/UX Designer (Trading Platform)
Design a world-class trading experience — Stripe-level design meets Binance-level functionality.

  • Design complete trading platform UI (dark mode, responsive)
  • Create design system, component library, and style guide
  • Design AI signal panel, social feed, and copy trading flows
  • Prototype interactions and micro-animations
Requirements: 3+ years UI/UX, Figma expert, Dark-mode dashboard/fintech experience, Trading platform or data-heavy UI preferred, Motion design a plus

Why FillX?

  • 100% Remote — work from anywhere
  • Flexible hours — async-first team
  • Ground floor — join a funded project at Day 1
  • High impact — small team, big ownership
  • Performance bonuses — results-driven compensation
Preferred timezone: UTC+2 to UTC+7 (Eastern Europe / Southeast Asia)
Type: Full-time contract | Start: ASAP

Apply Now: