Backend Engineer jobs in United States
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Mem0 · 23 hours ago

Backend Engineer

positionSan Francisco, CA
timeFull-time
remoteOnsite
seniorityMid Level
money$150K/yr - $180K/yr
date3+ years exp

Mem0 is building the memory layer for AI agents, enabling AI to remember conversations and learn from interactions. They are seeking a Backend Engineer to design and ship REST APIs, model data, debug customer issues, and optimize performance while collaborating with frontend and research teams.

Artificial Intelligence (AI)Information TechnologyMachine LearningSaaS

Responsibilities

Design & ship REST APIs: Define contracts, versioning, auth, rate limits; write migrations and docs
Model data & schemas: Relational (Postgres) and graph (e.g., Neo4j); enforce integrity and performance
Debug customer issues end-to-end: Trace with logs/metrics/traces, reproduce, fix, and write preventative guardrails
Optimize performance: Tune slow SQL with EXPLAIN/ANALYZE, indexes, partitioning, pagination, and caching (e.g., Redis)
Build services in Python: Async where it helps (FastAPI/Starlette, Django/DRF, Flask), background jobs, queues, schedulers
Operate in the cloud: Containerize with Docker, deploy on Kubernetes (EKS), and use AWS primitives (EC2, RDS/Aurora, S3, IAM)
Instrument everything: Custom metrics, structured logging, tracing; set SLOs and alerts (CloudWatch/Prometheus/OpenTelemetry)
Collaborate & ship: Work with frontend and research to scope APIs and deliver features to production

Qualification

REST APIsPythonPostgresAWSDockerKubernetesGraph databasesSQL tuningClear communicatorEffective collaborator

Required

3+ years building backend systems and shipping REST APIs to production
Strong Python fundamentals; experience with async programming and a major web framework (FastAPI/Django/Flask)
Solid data modeling and SQL skills; hands-on with query tuning and performance debugging in Postgres/MySQL
Experience with graph databases (e.g., Neo4j or Amazon Neptune) and appropriate data modeling trade-offs
Comfortable running services on AWS with Docker and Kubernetes
Demonstrated root-cause analysis and ownership from incident to prevention
Clear communicator and effective collaborator with frontend, research, and customers

Preferred

GraphQL/gRPC; event-driven systems (SNS/SQS/Kafka) and background workers (Celery/RQ)
Caching, rate limiting, multi-tenancy, and feature-flag strategies
Security & privacy best practices (PII handling, secrets management)
Deep observability experience (OpenTelemetry, SLO-based alerting)
Prior work with search/retrieval or memory systems
On-call experience and running blameless postmortems

Company

Mem0

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Mem0 is a SaaS company that specializes memory layers for LLM applications.
dateFounded in 2023
location
San Francisco, California, USA
people-size2-10 employees
web-link
https://mem0.ai

Funding

Current Stage
Early Stage
Total Funding
$24.4M
Key Investors
Basis Set VenturesKindred VenturesY Combinator
2025-10-28Series A· $20M
2025-10-28Seed· $3.9M
2024-09-25Pre Seed· $0.5M

Recent News

Built In
Mem0 Raises $24M to Overcome AI Memory Challenges
2025-11-04
alleywatch.com
The Weekly Notable Startup Funding Report: 11/3/25
2025-11-03
Tech Startups - Startups and Technology news
Top Startup and Tech Funding News Roundup – Week Ending October 31, 2025
2025-11-01
Company data provided by crunchbase