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I am a Senior Full Stack AI Engineer with 9+ years of experience building scalable full-stack systems and AI-powered products for global, fully-remote organizations. I thrive on translating ambiguous business needs into reliable, high-impact technical solutions and enjoy partnering with product, design, and security teams to deliver enterprise-grade software. My expertise spans React, TypeScript, Node.js, and production-grade LLM systems, including RAG pipelines, AI agents, and Azure OpenAI integrations. I bring a strong background in system design, cloud-native architectures, security, and technical mentorship, and I’m adept at guiding teams through architecture decisions, code reviews, and best-practice implementation of secure, observable systems.…I am a Senior Full Stack AI Engineer with 9+ years of experience building scalable full-stack systems and AI-powered products for global, fully-remote organizations. I thrive on translating ambiguous business needs into reliable, high-impact technical solutions and enjoy partnering with product, design, and security teams to deliver enterprise-grade software. My expertise spans React, TypeScript, Node.js, and production-grade LLM systems, including RAG pipelines, AI agents, and Azure OpenAI integrations. I bring a strong background in system design, cloud-native architectures, security, and technical mentorship, and I’m adept at guiding teams through architecture decisions, code reviews, and best-practice implementation of secure, observable systems.

Thomas Penza

Full Stack Developer, Back-End Developer, Front-End Developer, +3

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I am a Senior Full Stack AI Engineer with 9+ years of experience building scalable full-stack systems and AI-powered products for global, fully-remote organizations. I thrive on translating ambiguous business needs into reliable, high-impact technical solutions and enjoy partnering with product, design, and security teams to deliver enterprise-grade software. My expertise spans React, TypeScript, Node.js, and production-grade LLM systems, including RAG pipelines, AI agents, and Azure OpenAI integrations. I bring a strong background in system design, cloud-native architectures, security, and technical mentorship, and I’m adept at guiding teams through architecture decisions, code reviews, and best-practice implementation of secure, observable systems.…I am a Senior Full Stack AI Engineer with 9+ years of experience building scalable full-stack systems and AI-powered products for global, fully-remote organizations. I thrive on translating ambiguous business needs into reliable, high-impact technical solutions and enjoy partnering with product, design, and security teams to deliver enterprise-grade software. My expertise spans React, TypeScript, Node.js, and production-grade LLM systems, including RAG pipelines, AI agents, and Azure OpenAI integrations. I bring a strong background in system design, cloud-native architectures, security, and technical mentorship, and I’m adept at guiding teams through architecture decisions, code reviews, and best-practice implementation of secure, observable systems.

Available to hire

I am a Senior Full Stack AI Engineer with 9+ years of experience building scalable full-stack systems and AI-powered products for global, fully-remote organizations. I thrive on translating ambiguous business needs into reliable, high-impact technical solutions and enjoy partnering with product, design, and security teams to deliver enterprise-grade software.

My expertise spans React, TypeScript, Node.js, and production-grade LLM systems, including RAG pipelines, AI agents, and Azure OpenAI integrations. I bring a strong background in system design, cloud-native architectures, security, and technical mentorship, and I’m adept at guiding teams through architecture decisions, code reviews, and best-practice implementation of secure, observable systems.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Work Experience

Senior Full Stack AI Engineer at Netguru

September 1, 2023 - Present

Led the design and delivery of enterprise-grade full-stack applications using React, Next.js, TypeScript, and Node.js, ensuring scalability and performance across multiple client engagements. Designed and deployed LLM-powered production systems using Azure OpenAI, including end-to-end RAG pipelines (document ingestion, embeddings, retrieval, evaluation). Built and orchestrated AI agents with LangChain and LangGraph, enabling autonomous task execution, tool calling, and multi-step reasoning across distributed services. Translated ambiguous business requirements into robust architectures, reducing delivery risk and accelerating time-to-market. Collaborated closely with Product, UX, Cloud, and Security teams to ensure usability, compliance, and enterprise-grade security. Mentored mid-level and senior engineers through architecture reviews, AI best practices, and code reviews, improving technical maturity. Established CI/CD pipelines, automated testing strategies, and cloud-native deployme

Full Stack Engineer at Hotjar

November 1, 2021 - August 1, 2023

Built and maintained customer-facing product features using React, TypeScript, Next.js, and Node.js, with strong emphasis on UX and performance. Developed reusable UI components and optimized rendering using memoization and efficient state management. Integrated front-end applications with backend APIs and event pipelines, ensuring consistent telemetry and analytics. Improved accessibility and responsiveness following WCAG-minded best practices. Expanded automated testing coverage (Jest, React Testing Library), significantly reducing production regressions.

Senior Software Engineer at Canonical

November 1, 2021 - August 1, 2023

Delivered scalable web-platform features using React, TypeScript, and Node.js in a globally distributed engineering environment. Contributed to cloud-first architecture decisions, including API boundaries, observability, and deployment patterns. Integrated AI-assisted workflows (LLM-based automation and retrieval patterns), improving operational efficiency and reducing manual support. Mentored engineers on testing strategies, performance profiling, and code quality, raising overall team standards. Improved CI/CD pipelines and test automation, increasing deployment confidence and reducing rollbacks. Applied security best practices and OWASP guidelines across web services.

Backend Engineer at Toggl Track

January 1, 2017 - June 1, 2019

Developed and optimized Node.js/TypeScript backend services supporting high-traffic product features. Implemented ML and deep-learning pipelines (Python) for classification and anomaly detection on user behavior data. Integrated LLM-based internal tools for support and operations, improving case-resolution speed and consistency. Designed and documented APIs using OpenAPI/Swagger, accelerating cross-team integration. Strengthened release stability with automated testing and CI pipelines.

Full Stack Developer at Glints

July 1, 2016 - December 1, 2016

Built internal web modules using React and Node.js, translating product requirements into functional UI and APIs. Implemented responsive, reusable UI components using HTML5 and CSS3. Integrated front-end pages with REST APIs and basic authentication flows. Added unit tests with Jest, improving regression confidence. Optimized component rendering to improve performance on low-end devices.