Tim O'Brien
Summary
Experienced hands-on Java architect and Java developer with 18 years of proven track record, worked for Fortune 500 companies like Google, Citigroup, and Oracle. Adept at effectively communicating complex concepts and possessing a deep understanding of cutting-edge technologies such as blockchain, AI, LLM, and modern decentralized ID. I thrive in both small and large team environments a have enjoyed working for large-scale Fortune 500 companies and startups.
Overview
16
16
years of professional experience
1
1
Certification
Work History
CTO/Architect/Developer/Product Design
FuixLabs
01.2021 - Current
- Contributions included writing the initial system design document and implementing LLM agent architecture, authoring prompts, building a reinforcement learning platform, designing an RDBMS document storage helping to implement a workflow approval strategy using java and microservice. I participated, and sometimes lead, the daily scrum.
Technologies: Java, LLM, ChatGPT, Python, Solidity, AI - Designed an assisted in the implemented of the crypto payment system Sprynt.io. Solved performance problems with crypto payment by implementing a messaging system using Kafka that deliver transaction information in milliseconds to the payee.
Technologies: Java, Kafka, Ethereum Solidity Smart Contracts - Designed and helped implemented a complex land registry, Commands.org, including complex rules for loans and land boundaries.
Technologies: DID, Java, Cryptography, Smart Contracts, TensorFlow
Architect
Walmart
02.2020 - 01.2021
- Analyzed Walmart's Mexico fulfillment system and created an architecture document for migrating from a monolithic to a microservices architecture
- Implemented Sagato to route messages between microservices, implemented rules for shipper selection, developed internal/external ecommerce applications, and worked closely with stakeholders and UX designers.
Architect/Sr Java Developer/CTO
Ferdon
02.2018 - 01.2020
Designed and implemented a SaaS based No-Code product for smart contract creation and formal verification. Managed a team of 16 developers. Duties including designed and implementing ether smart contracts and building communication between the blockchain and a google cloud. I implemented a formal verification processor using Hadoop along with graph databases and proprietary algorithms.
Managed Amazon Cloud which included 20 EC2 instances.
Java/Go Programmer/Architect
Lunera
02.2017 - 02.2018
- Built asset tracking infrastructure that streamed data from IoT devices to Cassandra database using Kafka.
Java Programmer/Architect
Google
11.2015 - 01.2017
- Worked on Java to ObjectiveC transpiler, built backend process, configured and maintained Google Cloud, and designed and built communication architecture for mobile apps.
Sr Developer
Hewlett Packard
02.2014 - 11.2014
Java Developer
Hewlett Packard
11.2012 - 10.2013
Java Architect
Cerner Corporation
11.2012 - 10.2013
NTTData
11.2011 - 11.2012
Sr Architect
SITA
01.2011 - 11.2011
Sr Architect
Sempra
03.2010 - 12.2010
Oracle Product Specialist
Lifelock
03.2009 - 07.2010
Sr SOA Architect
BEA
12.2001
- Worked with BEA to design and implement SOA architectures using Enterprise Service Bus, Business Process Management, and Identity Services
- Worked mainly with Fortune 500 and Fortune 400 companies in the US, Europe, and Japan.
Education
BS Mathematics -
PURDUE UNIVERSITY
Skills
System Design
Java Programming
Certification
- Certified AI Specialist (DeepLearningAI)
- Certified Architect Weblogic 8.1
Skills
- Spring, Spring Boot, Spring Cloud, Kafka, Weblogic, J2EE, Web Services, EbXml, security, WS-
- Hibernate, OIA, OIM, Distributed System Design and Development, Weblogic, Reactjs, Nodejs, CSS, TensorFlow, Pandas, NumPy, Java, 14 years, Python, 2 years, Solidity, 5 years, Typescript, 4 years, Solid understanding of design and integration patterns. Strong experience using messaging systems including Kafka and Kafka Streams. Experience building microservices with Spring Boot, Spring Cloud and Kubernetes., Worked over 7 years with Weblogic, Oracle ESB, Amazon, Google, Golang, Java, solidity, blockchain, AWS, GCP, Kubernetes
Continuingeducation
- MACHINE LEARNING, Stanford
- CUSTOMER ANALYTICS, University of Pennsylvania
- ARCHITECTING WITH KUBERNETES ENGINE, Google University
- HADOOP PLATFORM, University of California
- INTRODUCTION TO BIG DATA, University of California
Languages
English
Bilingual or Proficient (C2)
German
Bilingual or Proficient (C2)
Vietnamese
Bilingual or Proficient (C2)
Timeline
CTO/Architect/Developer/Product Design
FuixLabs
01.2021 - Current
Architect
Walmart
02.2020 - 01.2021
Architect/Sr Java Developer/CTO
Ferdon
02.2018 - 01.2020
Java/Go Programmer/Architect
Lunera
02.2017 - 02.2018
Java Programmer/Architect
Google
11.2015 - 01.2017
Sr Developer
Hewlett Packard
02.2014 - 11.2014
Java Developer
Hewlett Packard
11.2012 - 10.2013
Java Architect
Cerner Corporation
11.2012 - 10.2013
NTTData
11.2011 - 11.2012
Sr Architect
SITA
01.2011 - 11.2011
Sr Architect
Sempra
03.2010 - 12.2010
Oracle Product Specialist
Lifelock
03.2009 - 07.2010
Sr SOA Architect
BEA
12.2001
BS Mathematics -
PURDUE UNIVERSITY