Blockchain Engineer: Build SDKs & On-Chain APIs (Remote)

Mono Protocol; United Kingdom; Remote; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Competitive salary

Flexible, remote-first policy

Generous PTO

Equipment & home office stipend

Professional development budget

Health & wellbeing support

Transparent culture

Job summary

A decentralized protocol company is looking for a Blockchain Engineer to build and maintain SDKs, APIs, and indexers. The ideal candidate should have strong backend engineering skills in Node, Go, Rust, or Python, as well as experience in API development and on-chain data indexing. This role offers a competitive salary, flexible remote work options, generous PTO, and professional development support, making it an attractive opportunity for passionate engineers.

Qualifications

• Strong backend engineering skills in Node, Go, Rust, or Python.
• Experience building APIs and SDKs for decentralized protocols.
• Familiarity with on-chain data indexing and GraphQL.

Responsibilities

• Build and maintain SDKs, APIs, indexers and developer docs.
• Work with The Graph, subgraphs, or custom indexers for on-chain data.
• Ensure reliable node/RPC infrastructure and developer experience.

Skills

Backend engineering (Node/Go/Rust/Python)

API development

SDK building

On-chain data indexing

GraphQL

Production deployment

Monitoring and observability

Job description

A decentralized protocol company is looking for a Blockchain Engineer to build and maintain SDKs, APIs, and indexers. The ideal candidate should have strong backend engineering skills in Node, Go, Rust, or Python, as well as experience in API development and on-chain data indexing. This role offers a competitive salary, flexible remote work options, generous PTO, and professional development support, making it an attractive opportunity for passionate engineers.