Luke Parsons

Tech. Lead for migration of Enterprise Legacy Applications to Angular 7/8/12/16, Node.js, REST API, JSON, Bootstrap, CSS, RxJS, and Redux. Architected, developed, and enhanced applications using ASP.NET, C#.NET, Blazor.NET, Angular, and .NET Core 2.1. Experienced in migrating Angular 8 → 12 and 12 → 16. Worked on Post Trade applications for monitoring, regulatory, and supervisory controls for Bonds, Repo, GICs, and Equities. Migrated GIC applications from Solaris 10 → Solaris 11 using Unix and Perl, then to Linux. Used SSIS for ETL from Oracle, XML, .txt, .CSV, APIs, and Sybase. Developed complex SQL Server queries, PL/SQL procedures, functions, and views. Created Web API services consumed in ASP.NET and Angular applications. Worked with Bitbucket, Jenkins (CI/CD with JIRA), SonarQube for monitoring, and Checkmarx for security checks. Performed code optimization, reviews, merges, and refactoring. Collaborated with Analysts, QA, and R&D teams to resolve issues. Authored technical and end-user documentation.

- Led the complete UI overhaul to a minimalist interface, enhancing user experience and onboarding processes. - Enhanced stability by implementing event tracking tools and a credit-card-free trial system, increasing app usage and engagement. - Developed advanced features, including in-app tutorials, a notification system, and split payment, improving functionality and user satisfaction. - Collaborated closely with marketing and customer support teams to analyze data and drive targeted improvements. - Introduced continuous integration, event tracking, and improved payment verification systems for reliability and efficiency. - Transformed the menu design, introduced a sidebar and customizable company logos, and redesigned the project, estimate, map, and invoice sections for enhanced usability and coherence.

Led end-to-end delivery of web and SaaS products for startups and small businesses from technical discovery and architecture through deployment and maintenance. Built full-stack applications using modern JavaScript/TypeScript, React/Next.js and Node.js, integrating third-party APIs, payment systems and internal tools. Designed and implemented AI-powered features (automation, recommendations, content generation) to streamline client workflows and improve business outcomes. Collaborated directly with founders and non-technical stakeholders to translate business goals into clear technical roadmaps and implementation plans. Set up CI/CD pipelines, observability and basic SRE practices to keep systems stable, secure and easy to scale as usage grew.

● Designed and deployed a Generative AI-powered Q&A system, enabling users to query large collections of unstructured documents using natural language. ● Built a Retrieval-Augmented Generation (RAG) pipeline leveraging LangChain and LlamaIndex for context-aware document retrieval. ● Integrated OpenAI GPT-4 with custom prompts and dynamic context injection to generate accurate, grounded answers. ● Developed backend APIs with FastAPI, containerized using Docker, and deployed on AWS ECS, utilizing S3 for storage and CloudWatch for monitoring. ● Created a lightweight Streamlit frontend to demonstrate and validate the system with internal stakeholders. ● Fine-tuned sentence-transformers to improve semantic search; implemented document chunking and indexing strategies with recursive splitters. ● Implemented OpenAI function calling to produce structured outputs for downstream workflows and integrations. ● Added guardrails and fallback logic for unclear or unsupported queries using prompt scaffolding and response validation. ● Logged interactions and outputs for auditability using LangSmith, Prometheus, and custom tracing hooks. ● Automated embedding refresh and vector index updates with PostgreSQL triggers. ● Evaluated LLM providers (OpenAI, Cohere, Anthropic) for performance, latency, and cost efficiency. ● Authored comprehensive documentation on system design, prompt engineering strategies, and maintenance guidelines for smooth handoff.

Focused on computer science fundamentals including software development, algorithms, databases, and web development. Completed projects related to full stack applications and basic AI concepts.