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Astrona

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Table of Contents

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Apply Now!

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Position Overview

Location: Remote Type: Freelance Start Date: ASAP Compensation: Competitive, project-based with potential for long-term collaboration

About Us

We’re a creative studio working at the intersection of crypto, tech, and design. Our work spans experimental dApps, protocol integrations, NFT ecosystems, and Web3-first products. Every project is different — some are sprints, some become long-term builds. We stay lean, adapt fast, and collaborate with talented freelancers to bring bold ideas to life.

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The Role

We’re looking for a freelance back-end blockchain developer to help architect and implement secure, scalable infrastructure for decentralized applications. You’ll focus on smart contract logic, API layers, server-side systems, and Web3 integrations. You should be comfortable working independently, making architectural decisions, and collaborating closely with front-end developers and researchers.

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Responsibilities

• Develop and maintain back-end infrastructure for Web3 applications – Write, test, and deploy smart contracts (Solidity, Vyper, or similar) – Build APIs and middleware for interacting with smart contracts and off-chain systems – Integrate Web3 tools and services (e.g. Infura, The Graph, IPFS) – Set up and maintain database systems (PostgreSQL or MongoDB) – Ensure scalability, performance, and security of backend components – Collaborate with front-end and product teams to ship complete features

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Required Stack & Skills

• Smart Contracts: Solidity – Hardhat – Foundry – Ethers.js / Web3.js – Backend: Node.js – Express.js – PostgreSQL or MongoDB – API Development: REST – GraphQL – Web3 Tools: The Graph – IPFS – Infura – Alchemy – WalletConnect – Security: Basic audit practices – gas optimization – safe contract design – Version Control: Git – GitHub – Testing & QA: Mocha – Chai – Hardhat tests – or similar

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Bonus Points

• Experience with event-driven systems and real-time data – Familiarity with Layer 2s and EVM-compatible chains – Knowledge of serverless architecture or containerization (Docker, AWS Lambda) – Contributions to open-source blockchain projects

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You’re a Good Fit If You

• Know your way around both blockchain internals and backend engineering – Can work fast without breaking things – Communicate clearly and follow through reliably – Have strong opinions on clean code and security best practices – Have a solid GitHub or track record of smart contract work

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How to Apply

We hire exclusively through Web3Talent — a Telegram mini app with a human-powered vetting layer. Every profile is reviewed manually. If you pass moderation, your application lands directly with the Astrona team.

We only consider complete profiles. Kit yours out — bio, crypto experience, portfolio links, socials. Empty profiles won't be reviewed.

Apply via Web3Talent →