Back End Developer

About Eterna Labs

Eterna is on a mission to build a best-in-class, low-latency trading interface for crypto markets engineered for next-generation performance. Founded by alumni of MIT, Harvard, and Yale, and backed by visionary investors like Naval Ravikant and Accomplice VC, we’re a deep-tech startup obsessed with speed, scalability, and reliability.

Our flagship product, HyperFlash, delivers high-speed trading infrastructure for digital assets. It combines liquid staking, MEV optimization, and a low-latency trading terminal bringing the precision of traditional finance to crypto. HyperFlash empowers traders to earn more, move faster, and access on-chain markets with institutional-grade performance.

Role Overview

We’re looking for a Backend Engineer who thrives in fast-paced, high-performance environments. You’ll work closely with a small team of elite engineers to build, optimize, and scale backend systems that power high-frequency, real-time trading.

You’ll get to ship production code daily, design systems that handle massive live data, and learn how a deep-tech startup scales from 0 → 1.

Tech Stack

• Languages & Frameworks: TypeScript, Node.js, Express, Next.js
• Databases: PostgreSQL, MongoDB, Redis
• Messaging & Streaming: Kafka, SQS
• Infrastructure: AWS (ECS, Lambda, RDS, ElastiCache, S3, CloudFront, CloudWatch), Docker
• Testing & CI/CD: Jest, GitHub Actions
• Protocols: REST, GraphQL, WebSockets

What You’ll Do

• Build and optimize low-latency indexers and data storage systems with high uptime.
• Architect and refine database schemas and storage formats for large-scale performance.
• Ingest and process massive real-time data streams at scale.
• Implement Redis caching for sub-second live data delivery.
• Design and develop REST/GraphQL APIs and backend services.
• Manage and monitor AWS infrastructure and CI/CD pipelines.
• Develop and maintain Kafka-based queues and WebSocket services.
• Optimize performance-critical paths and data aggregation layers.
• Integrate third-party services (e.g., wallet/KMS solutions).
• Build real-time notification and sniping systems for on-chain alerts.

You’re a Great Fit If You Are:

• Resourceful - You figure things out and ship, no matter what.
• Fast learner - You pick up new tools, frameworks, and paradigms quickly.
• High ownership mindset - You take pride in your code and its impact.
• Performance-obsessed - You love optimizing systems for speed and scale.
• Curious and experimental - You’re comfortable breaking things to learn fast.
• Familiar with AI tools like Cursor, GPT, Claude, Gemini, and other emerging platforms.
• Excited to ship 7 days a week and work in a culture that values momentum over perfection.