Hayden Nier
Primer.ai
11
years of professional experience
Accomplished Senior Software Engineer with 10+ years of expertise in frontend platform architecture and AI-driven workflows. Currently leading product delivery at Primer.ai, utilizing React, TypeScript, and Next.js for mission analysis platforms. Skilled in reusable component systems, cloud deployments, and integrating AI technologies to enhance productivity and platform reliability.
Work History
Senior Software Engineer
5 Years 5 Months- Led the Enterprise Mission Analysis project with the Analyst Workflows team using React, TypeScript, Next.js, GraphQL, and PostgreSQL, consolidating searches, source spans, citations, timelines, maps, and network graphs into one investigation flow and reducing analyst read-in time by 35%.
- Modeled Node.js API layers for routing, middleware validation, and controller-service separation, enabling seamless integration with Express.js and NestJS architectures while ensuring responsive React data views.
- Architected reusable React and Tailwind CSS component patterns for investigation workspaces, improving UI consistency while keeping complex workflows maintainable for distributed product teams.
- Architected reusable React and Tailwind CSS component patterns for investigation workspaces, enhancing UI consistency and maintainability of complex workflows for distributed product teams.
- Optimized rendering, cache behavior, and Core Web Vitals across document-heavy pages, improving load stability for large evidence sets, entity graphs, and timeline-heavy review flows.
- Designed PostgreSQL-backed data views and REST/GraphQL API contracts for source quality, workflow status, and review bottleneck dashboards used by mission analysts and product stakeholders.
- Implemented WCAG-focused accessibility checks, Storybook documentation, Jest coverage, and Playwright regression suites, decreasing production UI defects in analyst-facing interfaces.
- Partnered with product managers, design leads, analysts, and backend engineers to translate investigation workflows into practical implementation plans, release criteria, and production support paths.
- Mentored engineers on React architecture, TypeScript patterns, API consumption, test coverage, and code review discipline while maintaining senior-level quality standards for remote delivery.
Software Engineer
3 Years 10 Months- Designed secure mission operations dashboards for the Field Operations Workflow project with the Platform Applications team using React, TypeScript, REST APIs, and SQL-backed services, improving visibility across review queues, field activity, and exception tracking.
- Integrated Node.js, GraphQL, PostgreSQL, Redis, and REST services to enhance document workflows, status updates, and implementation guides for application teams.
- Built reusable frontend libraries with React, Storybook, Figma design patterns, and accessibility standards, reducing duplicated UI work across internal engineering teams by 30%.
- Developed responsive workflow interfaces with JavaScript, TypeScript, HTML5, CSS3, and Tailwind CSS, enhancing usability for distributed field users and program stakeholders.
- Implemented Playwright automation, Jest tests, accessibility checks, and frontend performance monitoring to strengthen release confidence across production web applications.
- Delivered cloud-native releases with AWS, Kubernetes, Terraform, Docker, CI/CD pipelines, Datadog, and Sentry, improving deployment repeatability and release coordination.
- Analyzed user behavior, event tracking, and SQL dashboard metrics to identify workflow friction and prioritize backlog items for mission-support applications.
- Collaborated with product owners, QA, security stakeholders, and engineering leads to clarify requirements, decompose epics, review code, and deliver release-ready work through Agile sprint cycles.
Software Engineer
1 Year 3 Months- Built account-opening and funding enhancements for the Brokerage Account Onboarding project with the Retail Brokerage Platform team using JavaScript, React, TypeScript, HTML5, CSS3, and REST APIs, reducing application handoff issues by 14%.
- Enhanced ACH validation and bank-linking exception handling for cash management workflows, increasing support team visibility into account-linking defects and payment validation failures.
- Delivered reusable UI components and portal patterns, internal servicing dashboards, and documentation pages, improving release consistency across brokerage and funding product surfaces.
- Developed analytics instrumentation for funnel analysis, engagement metrics, and onboarding behavior, providing product owners with insights to optimize completion flows.
- Developed analytics instrumentation for funnel analysis, engagement metrics, and onboarding behavior, giving product owners clearer signals for improving completion flows.
- Created implementation guides, flow diagrams, and technical documentation to enable product, support, and partner teams to validate brokerage onboarding and payment integration workflows pre-launch.
Education
B.S. - Computer Science
Skills
Frontend: React
Next.js
Tailwind CSS
HTML5
CSS3
responsive UI
component architecture
accessibility
Core Web Vitals
Backend: Node.js
REST APIs
GraphQL
controller-service patterns
middleware validation
API integration
secure data handling
service-oriented architecture
Databases: PostgreSQL
Redis
SQL
schema design
query optimization
event tracking
analytics instrumentation
Microservices architecture
Cloud & DevOps: AWS
GCP
Kubernetes
Docker
Terraform
GitHub Actions
CI/CD
observability
Datadog
Sentry
OpenTelemetry
Testing & Quality: Jest
Playwright
Storybook
accessibility testing
regression testing
code reviews
production debugging
Programming Languages: TypeScript
JavaScript
SQL
Python
C#
Timeline
Senior Software Engineer
Primer.ai
2021.04 - CurrentRead More
Software Engineer
Parsons Corporation
2017.06 - 2021.04Read More
Software Engineer
Fidelity Investments
2015.05 - 2016.08Read More
Rochester Institute of Technology
B.S. from Computer Science
Read More