octagon talentMiami, FL
Lead Elixir Platform Engineer
Lead Elixir Platform Engineer
Apply for this role (opens in a new tab)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 StackYou’ll be working with bleeding-edge tools purpose-built for real-time finance:
- NestJS – Modular TypeScript backend frameworkgRPC + 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 storageAPISIX – Cloud-native API Gateway
What We’re Looking For:
- 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 NestJSExperience 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
- What They OfferTop-of-market salary + possible equity + crypto bonuses
- Remote-first, async-friendly culture with flexible hours
- The chance to work on the cutting edge of finance and Web3A technical leadership role with influence over architecture and roadmap
- Collaborative, transparent team culture with real ownership
- 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.
To apply, please share your portfolio, GitHub profile, or examples of past work — particularly real-time applications, dashboards, or security/finance-related projects.
Also on the board Same function, level within a rung
Level
Lead
Location
Miami, FL
Occupation
Software Developers
Industry
Custom Computer Programming Services
Posted
today