Backend · Distributed Systems · AI

Molly Zeng.

Backend engineer building reliable distributed systems, voice AI workflows, and AI infrastructure.

I enjoy turning complex systems into reliable, understandable products.

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Selected experience

Engineering for real-world scale.

Alibaba International

AI Design Platform

Built production infrastructure for long-running generative AI workflows.

Backend Engineering Intern
  • Designed an asynchronous GPU execution pipeline handling 100K+ daily requests with sub-100ms submission latency.
  • Routed RocketMQ results to WebSocket sessions across backend instances for real-time progress updates.
RocketMQWebSocketGPU WorkloadsDistributed Systems

Seek AI

AI Tool Discovery

Built resilient ingestion, search, and data systems for an AI discovery product.

Backend Software Engineer Intern
  • Developed a fault-tolerant pipeline aggregating 3,700+ AI tools across 50+ domains.
  • Reduced database I/O by 75% by redesigning analytics storage around session documents.
PythonMongoDBElasticsearchData Pipelines

Selected projects

Systems explored beyond work.

Hackathon project

VivaTrace

A controlled voice-agent workflow with typed API contracts, deterministic interview state, idempotent turn commits, and evidence-backed reports.
Next.jsSupabaseOpenAI RealtimeState MachineZod
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Team course project

Distributed Live Chat

A Go and AWS messaging system with asynchronous reactions, persistent WebSockets, and cross-instance fan-out.
GoAWSDynamoDBSNS / SQSTerraform
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Team course project

LLM Serving Optimization

A vLLM serving study spanning local benchmarks and AWS SageMaker versus Google Vertex AI deployment.
vLLMSageMakerVertex AIDocker
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Skills

Backend

Python, Java, Go, FastAPI, Spring Boot, Gin, Flask

Data & Messaging

PostgreSQL, MongoDB, DynamoDB, Redis, Kafka, RocketMQ

Cloud & Infrastructure

AWS, GCP Vertex AI, Supabase, Docker, Terraform, Linux, CI/CD

AI Infrastructure

OpenAI Realtime, vLLM, GPU workflows, inference benchmarking, retrieval/search

Education

Northeastern UniversityM.S. Computer Science · 2026Zhejiang UniversityB.A. Accounting · 2022

Beyond code

Former National Level II AthleteBadminton, ball sports, and the outdoors.Reader of sociology and anthropology.