About Sixtyfour
Intelligence Infrastructure on People and Entities. Backed by Y Combinator.
About the role
AWS + Temporal in production (at least two of: ECS/EKS, Lambda, SQS/SNS, Batch, Step Functions, CloudWatch).
What they're looking for
- Hands-on experience with agentic architectures (tool calling, structured outputs/JSON, planning/execution loops) and prompt engineering
- Deep knowledge of OpenSearch/Elasticsearch : index design, analyzers, ingestion pipelines, snapshots, rolling upgrades, and zero-downtime reindexing/data migrations
- Proven web scraping expertise: solving CAPTCHAs, session/auth flows, proxy rotation, stealth techniques, and legal/ethical constraints
- Building high-throughput data/IO pipelines with concurrency (asyncio/multiprocessing), resilient retries, and rate-limit aware scheduling
- Integrating diverse external APIs (auth patterns, pagination, webhooks), designing stable interfaces and backfills
- Strong data wrangling with Pandas or equivalent, comfort with large CSV/Parquet workflows and memory/perf tuning
More about this role
- Design and ship agentic systems (tool calling, multi-agent workflows, structured outputs) that reliably fetch, extract, and normalize data across the web and APIs.
- Build and operate search/indexing pipelines on OpenSearch/Elasticsearch (schema design, analyzers, reindex/data migration strategies, relevance tuning).
- Own robust web scraping: directory crawling, CAPTCHA handling, headless browsers, rotating proxies, anti-bot evasion, and backoff/retry policies.
- Develop backend services in Python + FastAPI with clean contracts and strong observability.
- Scale workloads on AWS + Temporal (batch/queue workers, autoscaling, fault tolerance, cost control).
- Parallelize external API requests safely (rate limits, idempotency, circuit breakers, retries, dedupe).
- Integrate third-party APIs for enrichment and search; model and cache responses; manage schema evolution.
- Transform and analyze data using Pandas (or similar) for normalization, QA, and reporting.
- Pitch in across the stack: billing (Stripe), and occasional front-end changes to ship end-to-end features.
- Hands-on experience with agentic architectures (tool calling, structured outputs/JSON, planning/execution loops)...
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