Jonathan Seller

Built Semantic Search/GraphRag system for ingestion and retrieval. Context retrieval with knowledge graphs using ontologies. Semantic queries on embeddings.

• Python FastAPI with Postgres and BigQuery
• Ontology development for knowledge graph extraction by LLMs
• Vector embeddings using pgvector and pinecone
• Data Science ELT pipeline using Airflow/DataFlow
• Architecture direction for Maintainability, Portability and Observability
• LLM Token usage for COGS, evals for prompts and models
• AI assisted spec-driven-development using OpenSpec and Cline

Defining technical direction for a cross-functional and multidisciplinary team focused on e-commerce storefront performance metrics and analytics.

• Java/Spring API with Snowflake, Redis, and Coveo platform
• Requirements Development using BDD and RFCs for dependencies
• Data Science ELT pipeline using Prefect/ Snowflake/ Python
• CI/CD with github, automated functional BDD (karate) and load (gatling and locust) Testing
• AWS, Spinnker deployments, Graphana and Honeycomb observability

Led design and development of a new Supplier Data Platform

• Python/Flask API with replicated Postgres, Redis, ElasticSearch and Bigquery
• Product Architecture for Supplier Data APIs and Pipelines, Requirements Development using BDD
• Data Science ELT pipeline using Airflow/GCP Composer with Cloud SQL Postgres dbs
• CI/CD with github, Docker with automated TDD, functional (karate) and load (locust) Testing
• GCP BigQuery, Cloud Functions, PubSub event driven architecture

API development for rapidly scaling Email, Calendar and Scheduling product

• Python 2.7 and 3.8 Development using BDD and TDD techniques
• Product Architecture for Scheduling API
• Observability with Sentry, Honeycomb, Kibana. CI/CD with github, Docker, Harness

Server development for distributed teams using MS office

• Java OAuth2 authorization server with Spring, Postgres, Couchbase
• C# Windows VSTO development and AngularJS development for Office365 clients
• NLP development using apache open nlp and Spacy.io
• Requirements validation and verification NLP prototyping with python nltk.
• Jenkins, Release Management for Azure and on-premise install

Hired and mentored a team of Developers and QA and scaled architecture that decreased AWS cost by 70% while client base increased by 150%.

• Scaling a HTML/JQuery/PHP Laravel app from 10 - 50k users
• MySql, Redis, AWS Aurora
• Code management, code review and Release Management for AWS
• Continuous Integration with automated testing (Gherkin/pytest-bdd)
• Completed due diligence for VC investment of ~2 Million CAD

First technical employee. Built influencer marketing directory. Grew a team of engineers and directed product strategy using Roadmapping, Personas, User Stories and Acceptance Criteria. Sold to gShift March 2016.

• Python Django/Celery with Jquery/Bootstrap
• Postgres, RabbitMQ, Redis, ElasticSearch
• CI/CD with Jenkins. Monit, Datadog on AWS and Linode

Senior Developer/Team Lead for radian6 dashboards and salesforce marketing cloud social studio applications.

• SQL/NoSql databases, queueing (MQ), caching (Redis, memcached) MongoDB, Postgres, Redis
• JQuery/SalesforceUI Java (Struts and Dropwizard) web applications
• TDD (JUnit), BDD (Selenium with jenkins) CI/CD with Jenkins

Lead Developer for 3D content browsing platform.

• Event-based 3D User Interface using JavaScript with XPConnect/Spidermonkey engine
• C++, STL, Boost, Mozilla/XPCOM and Ogre 3D engine
• Multi-threaded Networking library that reduced response times by 4000%

Designed and implemented a scalable framework for delivering transit content to Internet devices.

• XSLT for client devices; XHTML with XForms, XFrame and RelaxNG validation
• C++ Framework on Trapeze Core Framework (WIN32 platform)

Mobile clients for banking and brokerage applications.

• UI for small devices: HDML, WML, and HTML early specifications. WAP/WML browsers and gateways
• development of XSLT processor, C++ server