Open to opportunities

Terry Slack

@terryslack

Senior front-end engineer delivering high-performance TypeScript/React/Next.js experiences with strong architecture and AI integration.

Canada

Message

What I'm looking for

I’m looking for a Senior Front-End role where I can own TypeScript/React/Next.js architecture, boost performance, and integrate AI features—while mentoring teams and collaborating across full-stack delivery with strong product ownership.

I’m a Senior Front End Engineer specializing in TypeScript, React, and Next.js, focused on scalable applications and intuitive user experiences. I build reusable component systems, improve performance, and integrate AI-driven features into modern web platforms.

In my recent work, I architected an HR platform MVP rebuild using TypeScript, React, Next.js, and modern state management, including AI-driven scheduling via OpenAI APIs. I also modernized design systems by migrating legacy CSS to Tailwind CSS, boosting development velocity and UI consistency.

Alongside product delivery, I publish and actively maintain open source libraries—four npm libraries centered on React components, state management, and performance optimization. I’ve developed Web Worker-driven API/state layers to reduce main-thread blocking, and I’ve created templates that accelerate secure back-end delivery.

I’ve led cross-stack collaboration across financial, healthcare, legal, education, and e-commerce domains—implementing JWT and OAuth 2.0 authentication, managing releases through Jira and Azure DevOps, and coordinating incident response. I’m known for architectural clarity, calm professionalism, and mentoring teams through strong technical ownership.

Experience

Work history, roles, and key accomplishments

Current

Open Source Developer

Current

Independent Consultant

Mar 2024 - Present (2 years 3 months)

Published and actively maintained four npm libraries focused on React components, state management, and performance optimization. Developed a Web Worker-driven API/state layer to reduce main-thread blocking and created an ASP.NET Core API template with JWT authorization and Dapper.NET data access.

TypeScript React NPM Performance Optimization ASP.NET Core JWT Dapper State Management

Senior Front End Engineer

Zenwave Talent

Jan 2022 - Mar 2025 (3 years 2 months)

Architected and developed a scalable HR platform using TypeScript, React, Next.js, TanStack Query, and modern state management patterns. Led an MVP rebuild with AI-driven scheduling via OpenAI APIs, modernized the design system by migrating legacy CSS to Tailwind CSS, and implemented secure JWT and OAuth 2.0 multi-tenant authentication.

TypeScript React Next.js Tanstack Query State Management OpenAI API Tailwind JWT OAuth 2.0 Azure DevOps

Senior Front End Engineer

Disco

Sep 2021 - Dec 2021 (3 months)

Developed legal-tech platform features including advanced file upload workflows, transcript indexing, and video synchronization. Built a Storybook-based component library, improved performance using React optimizations and efficient Apollo GraphQL query patterns, and integrated OAuth 2.0 for secure case management.

React Storybook Apollo GraphQL OAuth 2.0 Performance Optimization Component Libraries Data Processing

Senior Front End Engineer

RocketPlanTech

May 2021 - Aug 2021 (3 months)

Designed and implemented construction workflow features using React, Redux, and React Router. Used Web Workers to offload image processing tasks to eliminate UI blocking during heavy computation and mentored junior developers through pair programming and code reviews.

React Redux React Router Image Processing Code Review Pair Programming

Senior Front End Engineer

EAB

Oct 2019 - Feb 2021 (1 year 4 months)

Built React-based virtual tour applications for university clients with complex transaction workflows and analytics integration, and contributed to award-winning analytics dashboards with real-time reporting. Developed a custom React mapping solution using Google Maps APIs with TanStack Query and Redux, implemented JWT authentication, and supported CI/CD workflows and production incident response.

React Google Maps Tanstack Query Redux JWT Data Visualization CI CD Azure DevOps

Founder & Software Engineer

SoshaBull

Jan 2018 - Sep 2019 (1 year 8 months)

Founded and built a wellness platform with gamified goal tracking and social activity transaction workflows. Implemented server-side rendering with React and Redux to improve SEO and initial load time, and built Node.js and ASP.NET Web API infrastructure with CDN-based asset delivery plus RESTful .NET APIs backed by SQL Server.

React Redux Server Side Rendering Node Web APIs REST APIs SQL Server CDN

Software Engineer Contract

Multiple Locations

Jan 2016 - Sep 2017 (1 year 8 months)

Delivered front-end and full-stack solutions for enterprise, government, and e-commerce clients through full-time contract engagements, specializing in modernization using TypeScript/JavaScript and .NET services with SQL Server. Contributed to McDonald's global e-commerce platform order flow and payment transaction workflows, and modernized nine legacy government systems using Angular directives a

TypeScript JavaScript .NET SQL Server Modernization Angular JQuery UI Enterprise Development