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Zachary Johnson
Senior Full-Stack Engineer specializing in FinTech and cloud-backed web platforms
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About
Full-stack engineer with strong AI systems and B2B SaaS experience across BrightOps, Zapier, Nordstrom, and Calendly. They’ve owned architecture for an AI-powered tutoring platform, improved retrieval quality with a hybrid vector-plus-keyword approach, and built Go services processing over 1 million student events per day. Particularly compelling for teams building data-intensive, reliability-critical products with LLM, workflow automation, or compliance-oriented use cases.
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Key Strengths
- Full-stack engineering across frontend, backend, infrastructure, and product
- Architected and implemented major parts of an AI-powered tutoring platform
- Deep retrieval systems expertise including vector search and hybrid retrieval
- Hands-on TypeScript/React/Node.js development in recent production work
- Go microservices experience for high-volume event processing
- Built systems handling over 1 million student events per day
- Strong LLM/RAG evaluation and tooling experience
- B2B SaaS platform experience shaped by accuracy, explainability, and response-time requirements
- Reliability-focused backend design with idempotent processing and audit trails
- Cross-functional ownership in a 15-20 engineer startup environment
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