Senior Web3 Backend Engineer Job November 2025

As a Senior Backend Engineer focusing on data indexing, you will play a critical role in the MetaMask platform. Your responsibilities will include:

• Building and enhancing MetaMask’s backend data indexing services to enable broad and fast data coverage across blockchain network data (account balances, activity, and token price).
• Designing and implementing performant solutions to be used in MetaMask Clients including Extension, Mobile, and Web.
• Collaborating with backend API engineers, product managers, DevSecOps, SRE, and other engineers to deliver high-quality features.
• Ensuring the performance and stability of existing and new services.
• Participating in code reviews and helping maintain high code quality standards.
• Participating in on-call rotations to support our production services.

We are looking for a highly skilled and motivated engineer with a passion for Web3 and distributed systems:

• 3+ years working with backend technologies on production applications.
• Strong knowledge of Golang, SQL, data warehousing, and messaging systems (Nats, Kafka).
• Familiarity with blockchain fundamentals, client implementations of EVM and EVM equivalent networks, and indexing blockchain data.
• Experience building highly performant APIs and serving data at scale.
• Good knowledge of implementing observability metrics (Prometheus, Grafana).
• Experience in production-grade cloud deployment and AWS tooling.
• Experience working in an agile development team.
• Experience developing applications with clean code practices, testing, and adherence to coding standards.

Bonus Points:

• Experience with non-EVM blockchains.
• In-depth knowledge of Ethereum execution clients and smart contract standards.
• Interest in blockchain technologies and Web3 infrastructure.
• Basic understanding of cryptography principles.
• Experience working in distributed teams or previous experience in Web3.

Other skills to demonstrate:

• Good verbal and written communication in English.
• Teamwork, flexibility, and organization.
• Eagerness to learn and grow your technical skills.
• Self-motivated, and autonomous in your execution of tasks.
• Ability to balance technical quality with business needs and user experience.

To embark on this exciting journey with Consensys and MetaMask, please click the button below. In your application, highlight your experience with Golang, blockchain data indexing, and how you’ve contributed to high-scale backend services. We value diverse perspectives and encourage you to apply even if you don’t meet every single requirement, detailing your transferable skills. All applicants will be subject to background checks as a requirement of employment.

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Q1: What is the application deadline for this position?
The closing date for applications is December 8, 2025. We encourage you to apply as soon as possible.

Q2: Is this a remote or onsite position?
Consensys operates with a distributed team model, meaning this is a remote-friendly, full-time position.

Q3: What are the core technologies required for this role?
Candidates should have strong knowledge of Golang, SQL, data warehousing, messaging systems (Nats, Kafka), AWS tooling, and a solid understanding of blockchain fundamentals, particularly EVM networks.

Q4: What products will I primarily be working on?
You will be instrumental in enhancing the backend data indexing services for the MetaMask platform, which includes its Extension, Mobile, and Web clients, as well as integrating with other Consensys products like Infura.

Q5: What is the salary range for this position?
We offer a competitive salary globally. For US-based candidates, the salary range is $130,000 – $173,000 USD, not including bonus, equity, or other benefits.