Full Stack Developer (Web3)

Pengiklan Anonim; Banten; On-site; IDR 360,000,000 - 720,000,000; Full time

Job summary

Pengiklan Anonim seeks a capable full-stack developer to build and maintain web apps using Next.js and TypeScript, and to design robust REST APIs with MongoDB data models. You will integrate the frontend with wallet interactions and on-chain services, turning designs into responsive interfaces and keeping production services healthy.

The role requires strong React/Next.js experience, backend ownership across Node.js or Python or similar, deep MongoDB knowledge, and comfort with Git workflows.

Qualifications

• Experience with React and Next.js, including the App Router.
• Experience building backends and owning services; Node.js, Python, Go, PHP, or similar acceptable.
• Strong MongoDB knowledge: document design, indexing, aggregation pipelines.
• Comfortable with Git and collaborative workflows (branching, PRs, code review).
• Ability to translate Figma designs into responsive interfaces.
• Familiarity with AI coding tools and knowing when to correct outputs.
• Understanding of Web3 fundamentals: wallets, on-chain transactions, front-end interactions.
• Experience with Web3 libraries such as ethers.js, viem, or wagmi for wallet connections and transactions.
• Ability to read ABIs and call smart contract functions from an app.
• Understanding of gas, nonce, and transaction lifecycle in UI contexts.
• Basic English communication skills; portfolio or projects to show real abilities.

Responsibilities

• Build and maintain web applications using Next.js and TypeScript.
• Design and implement REST APIs with standard JSON payloads and MongoDB data structures; own services in production.
• Integrate frontend with smart contracts and on-chain services (wallets, contract state, transactions).
• Build responsive, fast websites and landing pages matching designs.
• Write supporting services or scripts in Node.js or Python as needed.
• Review code, maintain codebase health, and contribute to technical direction.
• Handle deployment, monitoring, and production issues.

Skills

React

Next.js

API design

MongoDB

Web3 basics

TypeScript

Git

Tools

Node.js

Python

ethers.js

viem

wagmi

Cursor

GitHub Copilot

Job description

What you'll be doing:

Build and maintain web applications using Next.js and TypeScript

Design and implement REST APIs with standard JSON payloads and efficient MongoDB data structures, and own the services you build until they run reliably in production

Integrate the frontend with smart contracts and on-chain services, including wallet connection, reading contract state, and sending transactions

Build responsive, fast websites and landing pages that match the design

Write supporting services or scripts, typically in Node.js or Python, as needed

Review code, keep the codebase healthy, and help shape the technical direction of our products

Handle deployment, monitoring, and production issues

What we're looking for:

Solid experience with React and Next.js, including the App Router

Experience building backends and taking full ownership of them. The language and framework are up to you, whether Node.js, Python, Go, PHP, or something else. What we care about is your ability to design APIs, handle authentication and input validation, and keep a service running in production

Strong working knowledge of MongoDB, including document structure design, indexing, and aggregation pipelines, and comfort working with standard JSON

Comfortable with Git and collaborative workflows such as branching, pull requests, and code review

Able to turn Figma designs into clean, responsive interfaces

Comfortable using AI coding tools such as Cursor, GitHub Copilot, or Claude to work faster, with a clear sense of when their output needs correcting

Able to work independently, break large problems into small steps, and communicate clearly about progress and blockers

Understanding of Web3 fundamentals, including how wallets work, how on-chain transactions behave, and how a frontend interacts with smart contracts

Experience with Web3 libraries such as ethers.js, viem, or wagmi for wallet connection, reading contract state, and sending transactions

Able to read an ABI and call smart contract functions from an application

Understanding of the transaction lifecycle, including gas, nonce, and pending states, and how to handle them in the user interface

Other Requirements:

Basic English communication skills, which will be assessed during subsequent interviews

No minimum years of experience required. We assess real ability and the work you have built, so please share a portfolio, GitHub, or projects we can look at