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Senior JavaScript Developer – Web3

2 weeks ago

Karachi, Sindh, Pakistan nextChainX Full time $90,000 - $120,000 per year

About NextChainX:

NextChainX
is building the future of
AI and Blockchain
by creating powerful decentralized products for global communities. We are working on innovative solutions within the
Solana ecosystem
and
EVM-based blockchains
, empowering developers, creators, and businesses in the Web3 space.

We are looking for a
Senior JavaScript Developer
who is passionate about
, , , MongoDB, and
, and ready to take on the challenge of creating world-class blockchain products.

Role Overview:

As a
Senior JavaScript Developer
at NextChainX, you will play a leading role in designing, developing, and testing decentralized applications (dApps) for
Solana
and
EVM ecosystems
. You'll work closely with blockchain engineers, product managers, and designers to bring innovative Web3 solutions to life.

We're not just looking for a developer — we're looking for a
builder with passion, creativity, and responsibility in their DNA
.

Key Responsibilities:

  • Lead the development of modern web applications using
    , , , and MongoDB
    .
  • Build, test, and deploy
    dApps
    in
    Solana
    and
    EVM-compatible blockchains
    .
  • Integrate
    smart contracts
    with front-end and back-end systems using

    and related SDKs.
  • Collaborate with blockchain engineers to implement wallet connections, token interactions, and NFT features.
  • Mentor junior developers and promote best practices in coding, architecture, and project management.
  • Take ownership of projects and ensure delivery of
    secure, scalable, and high-performance
    applications.
  • Explore new tools, libraries, and technologies to push the boundaries of innovation in Web3.

Required Skills & Qualifications:

  • 5+ years of professional experience
    in full-stack JavaScript development.
  • Strong expertise in

    and

    for frontend development.
  • Proficiency in

    and
    MongoDB
    for backend and database management.
  • Hands-on experience with

    (or ) for blockchain interactions.
  • Experience in
    Solana ecosystem development
    (Metaplex, Anchor, Candy Machine, wallet integrations).
  • Familiarity with
    EVM-based development
    and DeFi/NFT ecosystems.
  • Strong understanding of APIs, microservices, and scalable application design.
  • Experience with Git, CI/CD pipelines, and collaborative development workflows.

Nice to Have:

  • Knowledge of
    TypeScript
    .
  • Experience with
    smart contract development
    (Solidity or Rust).
  • Familiarity with
    DeFi protocols, DAOs, or NFT marketplaces
    .
  • Understanding of
    cloud deployment
    (AWS, GCP, Azure).

What We're Looking For in You:

  • Self-Motivated:
    You don't wait for instructions; you drive projects forward.
  • Innovator:
    You're excited about learning, creating, testing, and iterating products in Web3.
  • Responsible:
    Passion for building reliable, secure applications and taking accountability for outcomes.
  • Team Player:
    Ability to collaborate with cross-functional teams in a fast-paced environment.

What We Offer:

  • Competitive salary package.
  • The chance to
    build groundbreaking products
    in the Web3 and blockchain ecosystem.
  • Exposure to global blockchain communities and projects.
  • A culture that fosters
    innovation, ownership, and continuous learning
    .

How to Apply:

If blockchain is your passion and you're ready to build with us, send your CV to:


Subject line:
Senior JavaScript Developer – Web3/Blockchain