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valyndsilva/README.md

Valyn Maria D'Silva

Senior Product Engineer · AI Product Engineering · London 🇬🇧

Building SaaS products, AI-powered experiences, and production AI systems.

Open to fully remote and remote-first roles · Max 1 day/week onsite

🌐 Portfolio • 💼 LinkedIn • 📧 Email


👋 About Me

I'm a Senior Product Engineer with 10+ years building and scaling customer-facing B2B SaaS products across frontend architecture, backend systems, and AI.

Most recently at Trumpet, I owned the CMS, Widget Library, and real-time collaborative editor, while shipping AI-powered product experiences for enterprise customers including Stripe, HubSpot, and Gong.

I'm particularly interested in AI-native products, agentic workflows, evaluation and reliability, and product engineering, building software that solves real customer problems.


🏆 Selected Wins

  • 🚀 Reduced page creation time by 35% through a major CMS platform overhaul
  • ⚡ Led migration across 50,000+ customer pods with zero data loss or regressions
  • 🤖 Shipped AI-powered product features that increased buyer engagement by 22%
  • 🧩 Architected 18+ custom editor widgets and integrated 20+ plugins
  • 📈 Increased frontend test coverage from 15% → 55%

🌟 Featured Projects

Multi-agent clinical decision-support prototype built with Python, FastAPI, LangGraph, and PostgreSQL.

Highlights

  • Multi-agent workflow with isolated specialty advocates and a mediator
  • Deterministic auditor with zero LLM calls for clinical safety checks
  • Evidence-backed findings with citations and explicit handling of missing data
  • Durable workflows with checkpointing, clinician sign-off, and SSE streaming
  • MCP server for guideline retrieval and first-party AI tracing
  • Evaluation across 9 synthetic patients, catching 26/26 planted findings

AI-powered research platform built with FastAPI, LangGraph, PostgreSQL, and pgvector.

Highlights

  • Reflection-based agent workflows for iterative research and self-correction
  • Multi-provider architecture supporting Anthropic, OpenAI, and Google models
  • Embedding-powered retrieval using pgvector
  • Model-split strategy reducing LLM costs by 75%
  • Evaluation pipelines combining LLM-as-judge scoring and deterministic validation
  • Production-focused reliability through caching, rate limiting, SSE streaming, and regression tracking

Full-stack SaaS platform built with React, FastAPI, PostgreSQL, and OpenAI APIs.

Highlights

  • Multi-tenant architecture with subscription billing and RBAC
  • AI-powered CV analysis, interview preparation, job recommendations, and skills-gap assessment
  • Authentication, profile management, and role-based access control
  • End-to-end SaaS workflows spanning onboarding, subscriptions, and candidate journeys

🛠️ Technical Focus

AI & LLMs

RAG · Agentic Workflows · LLM Evaluation · LLM-as-Judge · Guardrails · Multi-Provider Orchestration · MCP

Frontend

React · Next.js · TypeScript · Tailwind CSS · PlateJS · Lexical · Storybook

Backend & Data

Node.js · Python · FastAPI · PostgreSQL · MongoDB · Convex

Testing & Infrastructure

Playwright · Jest · React Testing Library · GitHub Actions · Docker · Vercel · PostHog


🔭 Exploring

  • AI Evaluation & Reliability
  • Agentic Workflows
  • MCP (Model Context Protocol)
  • System Design
  • Product Engineering

Product Engineer focused on building reliable, user-centred products.

@valyndsilva's activity is private