Lawrence Karasek

About Lawrence Karasek

Full‑stack engineer with 10+ years of experience building and scaling SaaS, AI, and data‑driven systems. Proven success delivering complex 0→1 systems for startups and global enterprises.Highlights: Distributed system design • AI architecture (LangChain/RAG) • SaaS scalability • Team leadershipCORE SKILLS• Frontend: React, Next.js, TypeScript, GraphQL, React Query, Tailwind CSS• Backend: Node.js, tRPC, Python (FastAPI), Express, NestJS• AI Systems: Agentic AI, LangChain, RAG, Pinecone, OpenAI API• Data & Messaging: PostgreSQL, AWS DynamoDB, MongoDB, Redis, Kafka• Cloud/DevOps: AWS (ECS, Lambda, S3, API Gateway), Docker, Terraform, CI/CD

Experience

1. Staff Software Engineer

   Bug Labs

   Jan 2023 — Present · New York, NY, US

   Responsible for leading the design and hands-on development of the Signalpattern SaaS product to automate business UI generation from remote API sources focusing on the networking business vertical, including Verizon. Developed custom UI component libraries to automatically render graphical outputs from JSON data; Built distributed agentic AI system to reduce time and effort to identify and resolve network failures including: Back-end: data collection, preprocessing, analytics, metrics; service layer: REST API for network data, LLM prompt engineering; chatbot backend:LangChain, RAG and Pinecone; front-end: map display status of network locations/failures, LLM responses, automated UI chart generation; Led major architectural changes including containerization of the main web application to improve reliability and scalability and converting the application to a tenant-based SaaS solution; led engineering team to adopt agile methodologies to improve delivery time, quality and productivity. Tools/technologies used include:Front-end: React, Typescript, Nextjs; Back-end: REST APIs and services using using Node, Typescript, Python,Express, Nest, FastAPI; AI Systems: Agentic AI, LangChain, RAG, Pinecone, OpenAI API; Hosting/Scalability using AWS ECS Fargate and Lambda, API Gateway; Database development/storage using PostgreSQL, AWS DynamoDB, S3 and Elasticsearch, MongoDB; Containerization and orchestration using Docker and GitHub Actions; Event driven architecture and messaging using AWS SQS/SNs, Kafka and AWS Lambda; Infrastructure as Code using Terraform; Authentication using Cognito and OAuth; Observability and monitoring using AWS Cloudwatch

Education

• University of Ottawa

  B. Soc. Sciences, Economics

• University of Waterloo

  Masters, Economics

Skills

• Agile Methodologies
• Web Services
• Javascript
• Scrum
• Software Development
• Xml
• Visual Studio
• Soap
• C#
• .net
• Subversion
• Rest