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# Lead Backend Engineer

- **Company:** Octagon
- **Location:** Miami, FL, United States
- **Experience:** Expert
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Big Data, Cloud Engineering, Databases, Continuous Integration, Protocol Buffers, Node.Js, Blockchain, Data Streaming, TypeScript, WebSocket, Cloud Platform System, Backend, Rate Limiting, Event Driven Architecture, Kubernetes, Low Latency, Apache Kafka, Web3.js, Front End Software Development, Vertica, Api Gateway, NestJS, Grpc, Data Pipelines, Docker, Microservices
- **Published:** October 12, 2026
- **Apply:** https://www.thejobnetwork.com/job/fcb2bc3f-7032-40c5-a987-054155b850cb/lead-backend-engineer

## About the Role

· 5+ years in backend engineering, ideally with a focus on financial systems or high-throughput platforms

· Strong proficiency in TypeScript, Node.js, and frameworks like NestJS

· Experience with event-driven architecture and tools like Kafka

· Comfort working with gRPC, Protocol Buffers, and microservices

· Knowledge of blockchain fundamentals, smart contracts, or Web3 APIs (e.g., Ethers.js, Web3.js) is a big plus

· Solid experience with WebSockets and real-time messaging systems

· Proven ability to design and optimize time-series data solutions

· Familiarity with cloud-native infrastructure (Docker, Kubernetes, CI/CD pipelines)

· Security-first mindset - especially around financial and cryptographic systems

· Self-starter attitude, with the ability to thrive in a fast-moving startup environment

## Description

· Architect, develop, and maintain real-time APIs and backend systems powering crypto trading, DeFi analytics, and digital asset tracking.

· Build scalable microservices with NestJS and gRPC, and design APIs used by developers, trading platforms, and financial institutions.

· Manage streaming pipelines with Kafka to process high-throughput event data from blockchains and financial markets.

· Implement WebSocket-based services using Bun to push live updates (price feeds, wallet events, smart contract logs).

· Store and optimize time-series data using QuestDB for hot access and ClickHouse for long-term analytics and compliance reporting.

· Secure and orchestrate APIs through APISIX, with features like rate limiting, authentication, and request transformation.

· Contribute to infrastructure scalability, observability, and resilience in a mission-critical, high-uptime environment.

· Collaborate with smart contract developers, frontend engineers, and data scientists to ship features end-to-end.

The Tech Stack

You'll be working with bleeding-edge tools purpose-built for real-time finance:

· NestJS - Modular TypeScript backend framework

· gRPC + Protobuf - Blazing fast internal service communication

· Kafka - Event streaming for blockchain and financial data ingestion

· Bun - Ultra-fast runtime for high-frequency WebSocket communication

· QuestDB - Low-latency time-series database for recent data

· ClickHouse - Scalable analytics database for long-term storage

· APISIX - Cloud-native API Gateway