Lead Backend Engineer

Job Description

Job Description

Octagon Talent Solutions is a full-service technology recruitment and staffing company based in South Florida. We humanize technical recruitment by identifying candidates' long-term career goals and assessing cultural fit when presenting opportunities. Our focus on long-term relationships helps ensure placements that last.

Our client is a well-funded Web3 fintech startup redefining the future of real-time financial infrastructure. Our platform bridges traditional finance and decentralized systems, enabling seamless, secure, and transparent access to blockchain-powered financial services. They’re not just building APIs — they’re creating the data rails for the decentralized economy, supporting everything from real-time transaction monitoring to decentralized asset management. With deep backing from top VCs and a founding team of fintech and blockchain veterans, we’re scaling fast — and we’re looking for core engineers to shape what comes next.

What You’ll Do

• 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 :

What We’re Looking For

What They Offer

Join the Future of Finance

If you’re passionate about building real-time, decentralized financial infrastructure with an elite engineering team, we’d love to meet you.