John Harrison

Lead Software Engineer at MyBamubo

Owned front-end architecture for growth-focused web experiences using Next.js, React, and TypeScript; built reusable patterns for routing, layouts, and content-driven pages. Created and maintained a Storybook-based component library with standardized accessibility behaviors (keyboard navigation, focus management, ARIA) aligned to WCAG 2.1 AA. Improved performance across critical pages via Next.js rendering strategies (SSG/SSR/ISR), image optimization, and caching controls to enhance Core Web Vitals (LCP/CLS) and reduce mobile bounce. Integrated headless CMS workflows (Contentful-style modeling) with strongly typed TypeScript props to enable safe marketing updates. Designed lead-gen form architecture with React Hook Form-style patterns, server-side validation, and bot mitigation to reduce spam and improve completion. Instrumented analytics via tag management and a consistent data layer for conversion tracking and funnel measurement. Established CI quality gates with Git, CI/CD, Jest, an

Lead Software Engineer at MyBambu Memphis

Led end-to-end delivery of a money-movement feature set by designing Java/Kotlin services and REST APIs with idempotency keys, ledger-style reconciliation, and resilient retry policies to reduce duplicate transfers by ~40%. Integrated third-party payment rails via API adapters with TLS and AWS KMS-backed encryption for sensitive fields. Implemented OAuth2/OIDC-based authentication/authorization with least-privilege access for transfers and beneficiaries. Optimized mobile endpoints for latency with pagination, Redis caching, and PostgreSQL tuning to improve p95 responses by ~30%. Delivered a cross-platform React Native experience focusing on onboarding and transfer confirmation while maintaining secure local storage. Created an AI-assisted operations workflow using LLM summaries to triage tickets and surface root causes from logs/trace context, cutting MTTR by ~20%. Prototyped anomaly-based risk signals to prioritize manual reviews and reduce false positives by ~15%. Established CI/CD w

Lead Software Engineer at Mary Staff

Led architecture and delivery of cloud-native, microservices-based platform capabilities using .NET Core and TypeScript; designed REST and GraphQL APIs with consistent versioning, validation, and authorization patterns; built CI/CD pipelines with quality gates, automated tests, security scans, and progressive delivery; introduced observability-by-default standards (structured logging, metrics, tracing with OpenTelemetry; dashboards and alerting); implemented event-driven workflows using Kafka/EventBridge-style patterns; drove security-first design (OIDC/OAuth2, JWT, least-privilege access, secrets management); mentored engineers through design reviews and code reviews; evaluated AI-assisted development tooling and established guardrails for safe adoption.

Lead Software Engineer at MyBambu

Led architecture and delivery of cloud-native microservices-based platform capabilities using .NET Core and TypeScript; improved cross-team reuse through shared libraries, templates, and reference implementations. Built REST and GraphQL APIs with versioning, validation, and authorization; Created CI/CD pipelines with tests and security scans; Established observability standards (logging, metrics, tracing) and dashboards; Implemented event-driven workflows using Kafka/EventBridge to enable asynchronous processing at scale; Drove security-first design (OIDC/OAuth2, JWT, least-privilege access, secrets management); Facilitated design sessions and architecture reviews; Mentored engineers and contributed to AI-assisted tooling guardrails.

Senior Developer, Solution Architect at Big Nerd Ranch

Led client engagements delivering TS/JS front ends and .NET Core service layers; built reusable platform components (API gateways, auth modules, shared UI components); introduced containerized deployments with Docker/Kubernetes; implemented Terraform-based IaC; drove CI/CD with build/test/release automation and environment promotion; established comprehensive automated testing and observability; mentored teams and contributed to architecture governance.

Senior Developer, Solution Architect at ExxonMobil

Served as solution architect for enterprise clients, designing distributed architectures with TypeScript/JavaScript front ends and .NET Core service layers; built reusable platform components; containerized deployments with Docker/Kubernetes; standardized CI/CD and release orchestration; provisioned environments with Terraform; established observability and secure-by-default practices; designed data access patterns across SQL stores; led testing strategies (unit/integration/contract/e2e) and mentored teams; collaborated with architecture leadership to raise engineering standards in a regulated environment.

Software Engineer / Lead Developer at ExxonMobil

Developed and operated Java/Spring-based enterprise services and batch workflows; delivered secure APIs and robust data processing for mission-critical internal systems. Improved reliability through profiling, caching with Redis, and database tuning (indexes, query plans), reducing processing times by ~20% on key workflows. Implemented CI/CD automation with Jenkins and tested with JUnit; containerized deployments with Docker and Kubernetes, enabling repeatable builds and environments. Partnered with infrastructure teams to containerize services and deploy via Kubernetes (EKS) with Terraform-driven environments; established rollbacks and progressive delivery. Led incident response and observability rollouts using ELK, Prometheus, and Grafana; defined SLIs/alerts to reduce alert noise. Delivered AI-enabled automation using LLMs to assist support triage and engineering diagnostics, cutting time-to-resolution by ~25%.