Sixtyfour · San Francisco, CA, US · In-office · Posted 2mo ago
$120k - $200k
Intelligence Infrastructure on People and Entities
What you’ll do
• 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.
Minimum requirements
• 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. • AWS + Temporal in production (at least two of: ECS/EKS, Lambda, SQS/SNS, Batch, Step Functions, CloudWatch). • 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. • Familiarity with Stripe (subscriptions, metered billing, webhooks) and basic front-end changes (React/TypeScript or similar). • Excellent ownership, product sense, and pragmatic debugging.
Nice to have
• Entity resolution/record linkage at scale (probabilistic matching, blocking, deduping). • Experience with Langfuse, OpenTelemetry, or similar for tracing/evals; task queues (Celery/RQ), Redis, Postgres. • Search relevance (BM25/vector/hybrid), embeddings, and retrieval pipelines. • Playwright/Selenium, stealth browsers, anti-bot frameworks, CAPTCHA providers. • CI/CD, infrastructure as code (Terraform), and cost/perf observability. • Security & compliance basics for data handling and PII.