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Hi, I’m John Harrison, a Lead Software Engineer specializing in .NET, cloud-native architectures, and high-volume financial systems. With 10+ years building distributed fintech, healthcare, and insurance platforms, I design microservices, event-driven patterns, and API-first solutions on Azure and AWS. I also contribute to frontend development using React, Angular, and Blazor, and I enjoy mentoring engineering teams to deliver scalable, secure software. My greatest strength is removing barriers to collaboration and productivity so teams can ship reliable, business-critical features quickly. I’m passionate about building robust, data-intensive systems and guiding technical direction while staying hands-on with code and architecture. I thrive in cross-functional environments and love turning complex problems into elegant, maintainable solutions that deliver measurable value.…Hi, I’m John Harrison, a Lead Software Engineer specializing in .NET, cloud-native architectures, and high-volume financial systems. With 10+ years building distributed fintech, healthcare, and insurance platforms, I design microservices, event-driven patterns, and API-first solutions on Azure and AWS. I also contribute to frontend development using React, Angular, and Blazor, and I enjoy mentoring engineering teams to deliver scalable, secure software. My greatest strength is removing barriers to collaboration and productivity so teams can ship reliable, business-critical features quickly. I’m passionate about building robust, data-intensive systems and guiding technical direction while staying hands-on with code and architecture. I thrive in cross-functional environments and love turning complex problems into elegant, maintainable solutions that deliver measurable value.

John Harrison

Full Stack Developer, Web Developer, Front-End Developer, +5

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Hi, I’m John Harrison, a Lead Software Engineer specializing in .NET, cloud-native architectures, and high-volume financial systems. With 10+ years building distributed fintech, healthcare, and insurance platforms, I design microservices, event-driven patterns, and API-first solutions on Azure and AWS. I also contribute to frontend development using React, Angular, and Blazor, and I enjoy mentoring engineering teams to deliver scalable, secure software. My greatest strength is removing barriers to collaboration and productivity so teams can ship reliable, business-critical features quickly. I’m passionate about building robust, data-intensive systems and guiding technical direction while staying hands-on with code and architecture. I thrive in cross-functional environments and love turning complex problems into elegant, maintainable solutions that deliver measurable value.…Hi, I’m John Harrison, a Lead Software Engineer specializing in .NET, cloud-native architectures, and high-volume financial systems. With 10+ years building distributed fintech, healthcare, and insurance platforms, I design microservices, event-driven patterns, and API-first solutions on Azure and AWS. I also contribute to frontend development using React, Angular, and Blazor, and I enjoy mentoring engineering teams to deliver scalable, secure software. My greatest strength is removing barriers to collaboration and productivity so teams can ship reliable, business-critical features quickly. I’m passionate about building robust, data-intensive systems and guiding technical direction while staying hands-on with code and architecture. I thrive in cross-functional environments and love turning complex problems into elegant, maintainable solutions that deliver measurable value.

Available to hire

Hi, I’m John Harrison, a Lead Software Engineer specializing in .NET, cloud-native architectures, and high-volume financial systems. With 10+ years building distributed fintech, healthcare, and insurance platforms, I design microservices, event-driven patterns, and API-first solutions on Azure and AWS. I also contribute to frontend development using React, Angular, and Blazor, and I enjoy mentoring engineering teams to deliver scalable, secure software. My greatest strength is removing barriers to collaboration and productivity so teams can ship reliable, business-critical features quickly.

I’m passionate about building robust, data-intensive systems and guiding technical direction while staying hands-on with code and architecture. I thrive in cross-functional environments and love turning complex problems into elegant, maintainable solutions that deliver measurable value.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Language

English

Fluent

Work Experience

Lead Software Engineer at MyBambu

December 1, 2024 - December 1, 2025

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 ExxonMobil

April 1, 2021 - November 1, 2024

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.

Senior Developer, Solution Architect at Big Nerd Ranch

April 1, 2021 - November 1, 2024

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.

Software Engineer, Lead Developer at ExxonMobil

July 1, 2016 - April 1, 2021

Led development of enterprise applications using .NET Core services and TypeScript/JavaScript web interfaces; modernized legacy systems toward service-oriented architecture; built secure API layers with authentication/authorization; implemented monitoring and runbooks; designed data models and optimized SQL queries; mentored engineers through code reviews and pairing; contributed to standards for coding conventions, observability, and security.

Lead Software Engineer at Mary Staff

December 1, 2024 - December 1, 2025

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.