Blockchain developer

Amsterdam. Remote/relocation.

The First Studios is a FinTech company with offices in London and Amsterdam, developing solutions for Neo bank, Payments and Trading. With multiple projects in the pipeline, we’re looking for a Blockchain developer.

Key Responsibilities:

• develop an internal platform (API service) for interacting with blockchain networks, including Bitcoin, EVM-based blockchains (Ethereum, Arbitrum, BSC, etc.), Tron, Solana, Ton. Hands-on experience with at least two of the listed blockchains
• configure archival and full nodes  
• load balancing between blockchain nodes
• custom schedulers will be required to reconcile historical user wallet data for external products

Tech Stack

TypeScript:

• NestJS or Express (Bun & ElysiaJS experience is acceptable)
• Prisma, Drizzle, TypeORM, or other ORM solutions + NoSQL  
• Libraries: bitcoinjs, viem, tronweb, solana/web3.js, etc.  

Golang (1.22+):

• Strong proficiency in native libraries
• Frameworks: Gin or Fiber
• Database tools: sqlc, sqlx, gorm, etc.  

Infrastructure & DevOps:

- Docker, Kubernetes.

Additional:

• Experience with SQL (PostgreSQL) and NoSQL (MongoDB, ClickHouse, etc.) databases.  
• Understanding of application-level protocols: HTTP, gRPC, WebSocket. Experience with message brokers (Kafka).  
• Basic knowledge of encryption and elliptic curve cryptography.  
• Experience in dApp integration, smart contract development, blockchain protocol integration, CEX exchange integrations, and DeFi is a plus.