Senior Software Engineer - Predict

Consensys; United States; Remote; USD 140,000 - 180,000; Full time

Job summary

ConsenSys’ MetaMask team is seeking a Senior Software Engineer to join the Predict team, embedding prediction markets into the wallet across MetaMask clients.

You will design front-end components, build backend APIs, integrate with on‑chain protocols, and ensure security and performance for real-time data and high‑volume transactions. This is a remote-first, global team focused on Open Money, empowering users with secure, portable, self‑custodial finance.

Qualifications

• 3+ years mobile tech experience
• 3+ years building websites or apps
• Experience with React and React Native
• Strong knowledge of modern JavaScript (ES6/TypeScript)
• Familiarity with blockchain fundamentals and Web3
• Working knowledge of cross‑platform/browser compatibility
• Experience working with APIs and middleware services
• Experience in an agile development team
• Experience with clean code, testing and coding standards
• Understanding of web security considerations

Responsibilities

• Design front-end components and UIs for prediction market interactions across MetaMask clients.
• Develop robust backend services and APIs to fetch real-time market data, manage user positions, and sign transactions.
• Ensure seamless and secure integration with on‑chain prediction market protocols.
• Optimize performance and security of all Predict features handling real-time data and high-volume transactions.

Skills

React

React Native

JavaScript/TypeScript

Web3/Blockchain

APIs/Middleware

Agile

Testing/Quality

Security

Cross‑platform/Browser

Tools

REST APIs

Job description

Please note that we are unable to consider applications from candidates based in France, Italy, or Germany for this role.

Money is moving onto the internet, and the shift has a name: Open Money. This is money that is open, portable, agentic, and owned by you. MetaMask spent the last ten years building it; with 100M+ downloads, users in ~190 countries, and trillions in cumulative transaction volume, it's the most trusted self-custodial financial platform on the internet. Now we're building the operating system for your money: one place to hold, move, grow, and use anything you own. Join a remote-first, global team rebuilding how money works: a problem that touches everyone, every day.

About MetaMask

MetaMask aims to create a thriving engineering organization that supports the well‑being of our engineers while empowering them to do work they are proud of and enjoy. We strive for an environment that gives our people high trust and autonomy, while also facilitating collaboration, communication and camaraderie among teams and teammates. We aspire to build a diverse engineering team, inclusive to people from all backgrounds and demographics. It is also of great importance to us that working at MetaMask is an experience that catalyzes career growth and learning.

What you’ll do

This role is specifically within the Predict team, which is focused on integrating Prediction Markets directly into the MetaMask platform. As a Senior Software Engineer on this team, you will be instrumental in building the core infrastructure and user‑facing features that enable millions of users to engage with prediction markets securely and intuitively within their wallet.

• Designing and implementing the front‑end components and user experience for prediction market interactions across MetaMask clients.
• Developing robust and scalable backend services and APIs to fetch real‑time market data, manage user positions, and facilitate transaction signing.
• Ensuring seamless and secure integration with on‑chain prediction market protocols.
• Optimizing the performance and security of all Predict features, handling real‑time data feeds and high‑volume transaction throughput.

Requirements

• 3+ years working with mobile‑based technologies
• 3+ years building websites and/or applications
• Experience with React and React Native
• Strong knowledge of modern Javascript (ES6/TypeScript/etc.)
• Familiarity with blockchain fundamentals and Web3 integration
• Working knowledge of cross platform/browser compatibility
• Experience working with APIs and middleware services
• Experience working in an agile development team
• Experience developing applications with clean code practices, testing, and adherence to coding standards
• Understanding of web‑based security considerations

Would be great if you brought this to the role

• Experience with prediction markets, token trading and/or sports betting
• Experience with DeFi protocols, especially prediction markets
• Knowledge of financial products in the digital space
• Interest