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.