# Jaakko Hyöty | Product Builder & Software Engineer

Moving intelligent systems from prototype to production.

## About Me
I am a builder at heart, driven by a passion for solving business problems through code. With a background in Computer Science and Business Technology Management, I bridge the gap between technical engineering and real-world business value.
I thrive in the space where technology meets strategic problem-solving. I love the puzzle of analyzing data patterns, designing system architectures, and collaborating with cross-functional teams to drive features forward. I don't just write code to specifications; I dive deep into the domain to understand the "why" behind what we build.

## Where I Deliver Value (Focus Areas)
* **Product Engineer:** Focusing on robust software engineering, backend systems, and cloud provisioning. Working closely with product management to design and ship features that matter. Developing strong technical ownership to drive products from prototype to production.
* **AI Engineer:** Implementing intelligent agentic workflows, smart systems, and custom LLM integrations. Building machine learning applications and leveraging agentic frameworks.
* **Automation & Controls Engineering:** Programming PLCs with Allen Bradley (ControlLogix, CompactLogix) and custom control systems. Designing intuitive HMIs and integrating motor controls/hardware.
* **Forward Deployed Engineer:** Rapidly understanding client business problems, integrating complex data flows between third-party APIs and client infrastructures.
* **Analyst:** Applying computer science methodologies to extract multi-source market intelligence. Designing analytical tools to underwrite complex financial deals.

## Technical Skills
* **Frontend Development:** React, TypeScript, JavaScript, HTML, CSS, Responsive Design
* **Backend & APIs:** Python, FastAPI, Node.js, C++, SQL, PostgreSQL, REST APIs
* **Data & AI:** ML/Deep Learning, LLM Integration, Data Visualization, PyTorch, LangChain, Embeddings
* **Cloud Infrastructure:** AWS, Azure, Terraform, Docker, Linux, CDN, IaC, Networking, CI/CD, Serverless
* **Software Engineering:** Git, GitHub Actions, Agile, System Design, Testing, Event-Driven Architecture, Microservices

## Selected Projects
* **[Semantic YouTube Analytics with RAG](https://rag-tube.jahyoty.com):** An enhanced information layer for YouTube that saves heavy users time by bringing advanced semantic search and automated insights to video content. ([Live Demo](https://rag-tube.jahyoty.com))
* **[Agentic Market Research](https://d3j5ushyxyrurb.cloudfront.net):** An automated market research platform that deploys a cluster of AI agents to research any market topic and produce comprehensive reports. ([Live Demo](https://d3j5ushyxyrurb.cloudfront.net) | [GitHub](https://github.com/JaHyoty/agentic-market-research-team))
* **[Job Application Tracker](https://www.resumerepublic.com):** A full-stack platform that helps job seekers track applications, manage resumes, and gain AI-powered insights throughout the hiring process. ([Live Demo](https://www.resumerepublic.com) | [GitHub](https://github.com/JaHyoty/ResumeRepublic.com))
* **Stock Price Forecasting:** A deep learning model for time-series forecasting of stock price movements, built from scratch with a custom transformer architecture. ([GitHub](https://github.com/JaHyoty/TickerGPT))

## Blog Articles
* [Securing JWTs in Production: Common Vulnerabilities and Mitigations](https://jaakkohyoty.com/blog/secure-jwt-session-management) - 2026-06-25
  * Description: A deep dive into production JWT security vulnerabilities including signature bypasses, algorithm key confusion, client-side storage threats (XSS vs. CSRF), and token revocation strategies.
  * Tags: Security, JWT, Authentication, Session Management
* [Why We Use OAuth 2.0 and JWT (And How They Actually Work)](https://jaakkohyoty.com/blog/oauth-jwt-demystified) - 2026-06-24
  * Description: An in-depth look at the historical design choices, constraints, and failures that shaped OAuth 2.0 and JSON Web Tokens (JWTs) as modern identity standards.
  * Tags: Security, OAuth 2.0, JWT, Authentication
* [Transforming SharePoint Lists into Beautiful Timelines with Custom Coded Pages](https://jaakkohyoty.com/blog/custom-sharepoint-calendar) - 2026-05-25
  * Description: How to transform basic SharePoint list items into modern, informative calendar timelines. Learn how client-side .aspx web applications complement SharePoint Lists to deliver responsive scheduler widgets.
  * Tags: SharePoint, Gantt Chart, Client-Side SPA, UI Design