Blockchain Engineer (Backend / Protocol-Focused)

Location: New York preferred (Open to Remote for exceptional candidates)

Employment Type: Full-time

Industry: Fintech / Crypto Payments Infrastructure

**Role Overview:**

A crypto startup is hiring a Blockchain Engineer to help build and scale its core crypto and payments infrastructure.

***This role is focused on backend and blockchain systems, not consumer dApps or NFT projects.***

The ideal candidate has deep hands-on experience with blockchain protocols, strong backend engineering fundamentals, and comfort operating in a production, regulated fintech environment.

*We are hiring Blockchain Engineers with deep experience in at least ONE of the following ecosystems.*

Solana, Stellar (Soroban), or Ethereum Virtual Machine (EVM).

**Solana profile:**

You'll design, build, and maintain Solana programs and the backend services that integrate with them, while contributing to shared infrastructure across EVM, Solana, and Stellar. Our platform powers crypto-backed card products — processing high transaction volumes, continuously ingesting on-chain data, and navigating the unique complexity of each chain, with scalability and reliability engineered in from day one.

**What You'll Do:**

- Own and evolve Solana programs end-to-end — from development through deployment and maintenance
- Build robust, scalable backend services that interact with Solana, EVM, and Stellar networks
- Scale our on-chain infrastructure to support millions of users globally — powering transactions, data ingestion, and real-time processing
- Play a central role in shaping the technical and product roadmap
- Drive architectural decisions in a fast-moving, rapidly evolving product
- Ship new capabilities quickly and iteratively to our customers

**What We're Looking For:**

- Deep expertise in the Solana ecosystem, including its programming model, tooling, and best practices
- Strong proficiency in Rust
- Solid understanding of smart contract security patterns and common vulnerability classes
- Experience with Node.js and backend systems
- 4+ years of engineering experience

**Stellar Profile:**

You'll design, build, and maintain Soroban smart contracts on Stellar and the backend services that integrate with them, while contributing to shared infrastructure across EVM, Solana, and Stellar. Our platform powers crypto-backed card products — processing high transaction volumes, continuously ingesting on-chain data, and navigating the unique complexity of each chain, with scalability and reliability engineered in from day one.

**What You'll Do:**

- Own and evolve Soroban smart contracts end-to-end — from development through deployment and maintenance
- Build robust, scalable backend services that interact with Stellar, EVM, and Solana networks
- Scale our on-chain infrastructure to support millions of users globally — powering transactions, data ingestion, and real-time processing
- Play a central role in shaping the technical and product roadmap
- Drive architectural decisions in a fast-moving, rapidly evolving product
- Ship new capabilities quickly and iteratively to our customers

**What We're Looking For:**

- Deep expertise in the Stellar ecosystem, including Soroban's programming model, tooling, and best practices
- Strong proficiency in Rust
- Solid understanding of smart contract security patterns and common vulnerability classes
- Experience with Node.js and backend systems
- 4+ years of engineering experience; compensation will be calibrated accordingly

**Nice to Have:**

- Familiarity with Stellar classic operations

**EVM profile:**

You'll design, build, and maintain EVM smart contracts and the backend services that integrate with them, while contributing to shared infrastructure across EVM, Solana, and Stellar. Our platform powers crypto-backed card products — processing high transaction volumes, continuously ingesting on-chain data, and navigating the unique complexity of each chain, with scalability and reliability engineered in from day one.

**What You'll Do:**

- Own and evolve EVM smart contracts end-to-end — from development through deployment and maintenance
- Build robust, scalable backend services that interact with EVM, Solana, and Stellar networks
- Scale our on-chain infrastructure to support millions of users globally — powering transactions, data ingestion, and real-time processing
- Play a central role in shaping the technical and product roadmap
- Drive architectural decisions in a fast-moving, rapidly evolving product
- Ship new capabilities quickly and iteratively to our customers

**What We're Looking For:**

- Deep expertise in the EVM ecosystem, including smart contract development, tooling, and best practices
- Strong proficiency in Solidity
- Experience with development frameworks such as Hardhat or Foundry
- Solid understanding of smart contract security patterns, common vulnerability classes, and gas optimization
- Experience with Node.js and backend systems
- 4+ years of engineering experience; compensation will be calibrated accordingly

**Nice to Have:**

- Experience deploying across multiple EVM-compatible chains (Ethereum, Arbitrum, Base, Polygon, etc.)
- Familiarity with upgradeable contract patterns and proxy architectures