Evan H.

I help early-stage and scaling teams design, stabilize, and ship production systems on AWS. I work as a fractional engineering lead or senior individual contributor, typically supporting teams 5–15 hours per week. I have 8+ years of experience building and operating production-grade systems, and I currently lead engineering teams delivering high-scale, real-world platforms. My background combines hands-on Python development, AWS serverless architecture, and practical AI systems with a strong focus on reliability, security, and clear execution. What I Help With • Fractional engineering leadership and architecture guidance • AWS serverless systems (Lambda, EventBridge, SQS, DynamoDB) • Python backend development (FastAPI) and Node.js services • Agentic AI systems with production guardrails • Scaling, reliability, and cost optimization AI & Agentic Systems • LLM-powered workflows and task agents used in production • Tool calling, structured outputs, evaluation frameworks • RAG pipelines and vector search when appropriate • Emphasis on deterministic behavior, security, and failure modes • OpenAI and Anthropic integrations Backend & Cloud Engineering • Python APIs (FastAPI) and Node.js services (NestJS / Express) • Event-driven architectures and asynchronous workflows • Authentication and authorization (JWT, RBAC) • AWS infrastructure and serverless-first system design How I Work • I often start with a short, paid architecture or reliability audit • Clear written recommendations and documentation • Low-overhead, async-friendly collaboration • Comfortable owning problems end-to-end without supervision Why Clients Hire Me • Senior-level judgment and calm execution • Strong system design and operational mindset • Clear communication and realistic timelines • Ability to unblock teams quickly without micromanagement If you need a senior engineer who can build, stabilize, and lead when needed — without the overhead of a full-time hire — I’m happy to talk.