Daniel Mcconn

Led architecture and implementation of an event-driven ingestion service connecting diverse customer signals, marketing pipelines, and on-chain sources using TypeScript, Node.js, and Kafka. Built a React control surface for real-time campaign telemetry with wallet-connected proof-of-action flows, and implemented backend APIs and schema contracts using tRPC, Prisma, and PostgreSQL to normalize event data for analytics. Developed lightweight ingestion adapters for Ethereum and Solana indexed feeds, including transformation of raw on-chain events into normalized records. Improved stability using Redis-based streaming deduplication/buffering and Kafka consumer group patterns, and owned CI/CD and rollout strategy by containerizing microservices with Docker and deploying on Kubernetes with health checks and Prometheus metrics. Enhanced observability with structured logs and distributed tracing in Grafana, mentored engineers on full stack/Web3 patterns, and evaluated third-party Web3 SDKs via

Led development of a multi-tenant analytics dashboard for market indicators, delivering React UI and Node.js APIs for off-chain market data and blockchain-derived signals. Architected secure wallet onboarding and DeFi read-only integrations using ethers.js with server-side aggregation in TypeScript. Implemented PostgreSQL models and query patterns with Prisma, optimizing time-series reads for charts and historical playback. Built high-throughput websocket subscription services with Fastify for live chart updates. Improved resilience by adding retry/backoff for Web3 node calls and isolating long-running fetchers into background workers. Coordinated multi-chain design reviews to standardize abstractions across Ethereum and experimental Solana connectors, and added automated contract/schema validation using Zod integrated into CI checks.

Developed payment orchestration and subscription management features using Node.js, TypeScript, and REST APIs integrated with third-party payment processors. Built React components for billing and plan management with secure flows backed by PostgreSQL models. Implemented transactional event pipelines to reconcile payment events with product entitlement systems using background workers and Redis queues. Participated in service decomposition and migration to containerized services using Docker and orchestrated deployments to cloud environments. Worked on observability and alerting for payment-critical paths through structured logging and dashboarding, and collaborated with security/compliance teams to harden APIs for PCI-sensitive interfaces.