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Senior Backend Engineer – Data Infrastructure & AI Systems

United States
Visa Sponsorship Relocation
This Job is No Longer Active This position is no longer accepting applications
AI Summary

Join a high-growth AI company building expert reasoning and data infrastructure for frontier AI models. As a Senior Backend Engineer, you’ll design scalable data pipelines, cloud infrastructure, and distributed systems while owning full project lifecycles from architecture to production deployment. Requires deep expertise in backend systems, distributed architectures, and cloud platforms like AWS/GCP.

Key Highlights
Own end-to-end data infrastructure projects, including pipelines, cloud architecture, and production deployment
Work closely with founders to define product strategy and make critical technical decisions
Build high-throughput, low-latency systems using Python, JavaScript, Kafka, Redis, and Kubernetes

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Key Responsibilities
Design and implement scalable backend systems and complex data-capture workflows using Python and JavaScript/Next.js
Architect high-throughput, data-heavy pipelines capable of handling demanding production workloads
Own cloud infrastructure across AWS or GCP, including serverless systems, Kubernetes deployments, and Docker operations
Build and maintain low-latency distributed systems using Kafka/RabbitMQ, Redis, and Elasticsearch
Take projects from ambiguous problem definition through architecture, implementation, deployment, and delivery
Collaborate with founders to define product strategy and make impactful technical decisions
Establish engineering best practices and foundational systems for team growth
Technical Skills Required
Python Distributed Systems Amazon Web Services

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Benefits & Perks
Competitive salary and meaningful equity
Visa sponsorship available (O-1 and H-1B transfers)
Relocation support may be negotiated at offer stage

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Nice to Have
Experience with AI research, LLM evaluations, or human-in-the-loop systems
Familiarity with frontier-model data infrastructure

Job Description

🚨 Software Engineer – Backend, Data Infrastructure & AI

📍 San Francisco – On-site

I’m working with one of the fastest-growing companies in AI, building the expert reasoning and data infrastructure used to develop frontier models.

They capture the step-by-step reasoning, trade-offs and judgment of nearly 100,000 verified domain experts, transforming it into high-quality training data, evaluation frameworks and agent environments for the world’s leading AI labs.

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Job Overview
Posted Aug 15, 2026
Employment Full-time
Experience Mid-Senior level
Location United States
Category Programming
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