Available to hire
I am Lijun Pu, a seasoned solution architect and AI engineer with 20 years of experience translating government and financial industry needs into robust, full‑stack solutions. I design and implement enterprise-grade apps in secure, scalable environments using cloud, REST APIs, container orchestration, and AI-powered models. I thrive on delivering practical SDLC practices, guiding stakeholders, and producing architectures that scale with complex data and high availability requirements.
Work Experience
AI Engineer
June 1, 2022 - PresentUtilize Monte Carlo simulation to predict outcomes of uncertain events; build Monte Carlo simulations in Java(Spring) and Python (Django, Flask); apply AI in coding and pre-trained models; improve and correct code generated by AI tools; discover patterns in Monte Carlo data using predictive analytics.
Solution Architect at IBM
June 1, 2022 - October 20, 2025Identify client problems and perform business analysis to define requirements; design and develop prototype applications within short SDLC; prepare executive, management, and technical documentation; demonstrate IBM solution ideas in prototypes to win contracts.
Cloud Engineer, Senior Back End Software Engineer at Infrastructure Canada
October 1, 2021 - October 20, 2025Assist client in installing and deploying Appian on Azure via Linux VM; develop full-stack application connecting users locally and enabling file exchange to be printed via HP On-Premise Print Cloud platform.
Real Time Big Data Developer at NAV CANADA
April 1, 2020 - October 20, 2025Investigate strategies and technologies for real-time big data storage and processing of SWIM; design, develop, and test SWIM in a data-driven and event-driven architecture; deploy client-side SWIM applications on Docker; map data fields via Dozer; track progress using SCRUM.
Solution Architect and Senior Full Stack Java Developer at Object Solutions Inc.
March 1, 2019 - October 20, 2025Evaluate hybrid cloud tools (OpenShift, Pivotal); transform data from third-party tools; implement Terraform and OpenShift on Azure; support CI/CD pipelines with Jenkins; design distributed, scalable architectures for large enterprise data.
Senior Software Developer and System Analyst at MXI Technologies (now part of IFS)
May 1, 2017 - October 20, 2025Deliver enterprise software consulting to aviation clients; redesign microservices-based system for real-time aircraft and airport traffic; redesign database for large-scale aviation data; implement Google Analytics; support migration to REST APIs and cloud-ready deployment.
Solution Architect and Senior OO/Java/J2EE Specialist at Object Solutions Inc
November 1, 2015 - October 20, 2025Evaluate and migrate hybrid cloud tools for large government workloads; transform data between third-party tools and enterprise applications; deploy to cloud using Terraform and OpenShift; lead teams across design, testing, deployment, and security.
Senior Software Developer and System Analyst at Shared Services Canada
March 1, 2014 - October 20, 2025Identify root causes of automatic deployment and monitoring tool AMT; decentralize state to distributed data stores; automate system administration tasks; implement Selenium-based automated testing; migrate from Struts-based UI to modern REST/EJB patterns; integrate OSSEC IDS.
Solution Architect, Business Analyst and Full Stack Java Developer at Health Canada
February 1, 2013 - October 20, 2025CSIMS project; design manual/automated test cases; convert paper forms to XML-based formats to support electronic drug regulatory processes; improve performance; support web-based and DMZ deployments; integrate enterprise components and APIs.
Senior Java/J2EE Engineer at Object Solutions Inc
November 1, 2011 - October 20, 2025Deliver Java/J2EE applications for government and enterprise clients; contribute to design, development, testing, and deployment in distributed environments.
Solution Architect, Senior OO/Java/J2EE Specialist and Team Leader at FreeBalance Inc
November 1, 2004 - October 20, 2025Technical lead for SDLC-driven projects; mentor team members; gather requirements and translate to UML/RUP artifacts; implement automated testing framework and manage configuration/data exchange with SAP/Oracle integration.
Solution Architect, Senior Java/J2EE Specialist and Team Leader at Object Solutions Inc
December 1, 2006 - October 20, 2025Led design and development of Java/J2EE enterprise applications for government clients; implemented and guided use of SOA, EJB, Struts, Spring, and ORM frameworks; coordinated cross-team efforts.
OOA/D, Java Developer at James Martin & Co.
September 1, 1994 - October 20, 2025Software development using OOA/D, UML, and Java/J2EE; contributed to enterprise-scale web and SOA projects.
Senior OO/Java/J2EE Developer at Nortel Networks
August 1, 2001 - October 20, 2025Develop SMI (System Manager Interface) network management system; multi-threaded Java/JFC-based client/server components; SNMP-based management.
Pre-sale Support System Engineer and Team Leader at Nortel BUPT R&D Center
October 1, 1999 - October 20, 2025Provide pre-sale support, mentor software engineers; contribute to R&D in UNIX/X-Windows environments; software engineering tutoring.
OO Enterprise Software Engineer at James Martin & Co.
September 1, 1994 - October 20, 2025Software engineering with OOA/D using C++; multi-platform experience in UNIX and Windows environments.
Solution Architect at IBM
June 1, 2022 - October 20, 2025Identified client problems and performed business analysis to define requirements; designed and developed prototype applications within short SDLC timeframes using suitable technologies; prepared executive, management, business analyst, technical architect, and developer documentation; demonstrated IBM solution ideas in prototype applications to customers, contributing to winning contracts.
Cloud Engineer, Senior Back End Software Engineer at Infrastructure Canada
October 1, 2021 - October 20, 2025Helped the client install and deploy Appian on Azure via Linux VM; contributed to backend development and cloud integration; supported DevOps activities and integration efforts.
Cloud Engineer, Senior Back End Software Engineer at Hewlett Packard Enterprise
October 1, 2021 - October 20, 2025Developed a full-stack application connecting local users and exchanging files to be printed through HP's On-Premise Print Cloud platform; implemented REST APIs, Java/Spring backend, and frontend integration; leveraged Docker/Kubernetes and cloud technologies.
Real Time Big Data Developer at NAV CANADA
April 1, 2020 - October 20, 2025Investigated strategies and technologies for real-time big data storage and processing for SWIM; designed data-driven and event-driven microservice architecture; deployed client-side SWIM applications in Docker; performed field mapping with Dozer; tracked progress using SCRUM.
Solution Architect and Senior Full Stack Java Developer at Object Solutions Inc.
March 1, 2019 - October 20, 2025Delivered enterprise software consulting to aviation clients and government agencies (AAFC, CBSA, CAF); evaluated hybrid cloud tools (OpenShift, Pivotal); transformed data between third-party tools and web-based enterprise apps; deployed solutions in cloud and integrated CI/CD pipelines.
Senior Software Developer and System Analyst at MXI Technologies (now part of IFS)
May 1, 2017 - October 20, 2025Delivered microservices-based system design for real-time aircraft and airport traffic; redesigned large-scale aviation databases; implemented analytics tracking and data-driven enhancements.
Solution Architect and Senior OO/Java/J2EE Specialist, Platform Analyst at Object Solutions Inc.
November 1, 2015 - October 20, 2025RAPM enhancements for CBSA; ESDC technical guidance; migrated Foss to a distributed n-tier Java EE application; implemented REST APIs, CI/CD integration, and cloud readiness.
Solution Architect, OO/Java/J2EE Specialist at Shared Services Canada
March 1, 2014 - October 20, 2025Root cause analysis and modernization of AMT deployment/monitoring; decentralized state with distributed data stores; automated testing with Selenium; migrated Struts/MVC to REST and integrated OSSEC IDS.
Senior Java/J2EE Engineer at Object Solutions Inc.
November 1, 2011 - October 20, 2025Performance evaluation and modernization of Adobe Digital Enterprise Platform; migrated monolithic Java EE apps to REST-based services; contributed to cloud deployment strategies and integration efforts.
Software Engineer (Full Time) at Nortel Networks
August 1, 2001 - October 20, 2025Developed SMI (System Manager Interface) - a multi-threaded network management system for Nortel Metro 5000, enabling local/remote monitoring and diagnostics; applied OOA/D and JFC in Java.
Pre-sale Support System Engineer and Team Leader at Nortel BUPT R&D Center
October 1, 1999 - October 20, 2025Provided pre-sale support, mentored engineers, and led projects at a Beijing R&D center; developed prototypes and advised on architecture and implementation strategies.
OO Enterprise Software Engineer at James Martin & Co.
September 1, 1994 - October 20, 2025OOA/D with C++ for enterprise software development; contributed to client-focused solutions and architecture planning.
Independent / Consultant – AI Engineer at Self-Employed / Consultant
June 1, 2022 - PresentLead AI/SDLC projects for government and financial clients. Built Monte Carlo simulations in Java(Spring) and Python; applied pre-trained AI models to predict outcomes; refined source code quality and leveraged predictive analytics to discover patterns in simulation data.
Solution Architect at IBM
June 1, 2022 - October 20, 2025Identify client problems, perform business analysis, define requirements, and design prototype applications to demonstrate IBM solutions. Prepare executive-facing documents and guide delivery teams through short SDLC cycles in cloud/hybrid environments.
Cloud Engineer / Senior Backend Software Engineer at Infrastructure Canada
October 1, 2021 - October 20, 2025Help the client install and deploy Appian on Azure via Linux VM; contribute to cloud-native back-end services and DevOps practices in a government IT environment.
Full Stack Developer / Cloud Engineer at Hewlett Packard Enterprise
October 1, 2021 - October 20, 2025Develop a full-stack application connecting local users and exchanging files through HP's On-Prem Print Cloud platform; implement containerized services and CI/CD pipelines.
Real Time Big Data Developer at NAV CANADA
April 1, 2020 - October 20, 2025Investigate strategies for SWIM real-time data storage/processing; design and implement a Data-Driven and Event-Driven architecture to track real-time aircraft and airport traffic with high availability and distributed microservices.
Solution Architect and Senior Full Stack Java Developer at Object Solutions Inc.
March 1, 2019 - October 20, 2025Delivered enterprise software consulting; redesigned systems for high-volume data and cloud-ready deployment; integrated analytics and RESTful services; assisted government and aviation clients with modernization.
Senior Software Developer and System Analyst at MXI Technologies (now part of IFS)
May 1, 2017 - October 20, 2025Supported aviation customers with microservices-based architecture, real-time data handling, and performance tuning; redesigned databases for large-scale aviation data and integrated analytics.
Solution Architect, Senior OO/Java/J2EE Specialist, Platform Analyst at Object Solutions Inc.
November 1, 2015 - October 20, 2025Evaluated OpenShift/Pivotal hybrid cloud options for AAFC; transformed data between third-party EWIR tools and web-based enterprise apps; deployed CI/CD pipelines and modernized legacy systems.
Solution Architect, Senior OO/Java/J2EE Specialist at Shared Services Canada
March 1, 2014 - October 20, 2025Root-cause analysis of automatic deployment/monitoring tool AMT; decentralized state, automated deployment procedures, and web-based automated testing using Selenium.
Solution Architect, Business Analyst and Full Stack Java Developer at Health Canada
February 1, 2013 - October 20, 2025Design and automate test cases; convert paper forms to XML-based electronic processes; improve performance and security in a Java/J2EE DMZ environment.
Senior Java/J2EE Engineer at Object Solutions Inc.
November 1, 2011 - October 20, 2025Developed enterprise applications with SOA, REST/Web Services, and integration with SAP/.NET ecosystems; led performance improvements and large-scale deployment.
Software Engineer at Nortel Networks
August 1, 2001 - October 20, 2025SMI system development; multi-threaded network management for Metro 5000; contributed to SNMP-based monitoring and diagnostics.
Pre-Sale Support System Engineer and Team Leader at Nortel BUPT R&D Center
October 1, 1999 - October 20, 2025Pre-sales support in Beijing; led teams, provided software engineering coaching, and supported international customers with networking and OSS/BSS solutions.
OO Enterprise Software Engineer at James Martin & Co.
September 1, 1994 - October 20, 2025OO design and Java development across client/server and early web-based applications; contributed to enterprise-grade software projects.
Education
Master of Science Program Part-time at University of Texas, Arlington
September 1, 1992 - May 1, 1994Not finished
Bachelor of Science at Minnesota State University, Mankato
September 1, 1989 - April 1, 1992Qualifications
Security Clearance TOP SECRET
June 28, 2023 - February 24, 2026Industry Experience
Government, Software & Internet, Transportation & Logistics, Professional Services, Media & Entertainment, Travel & Hospitality, Healthcare
- Average Investor Final Profit: 0.38
- Average Market Maker Final Profit: 99.95
- Probability Investor Lost Money: 47.6%
- Probability Market Maker Lost Money: 0.0%
Use ChatGPT to build a Monte Carlo simulation showing why market makers profit while most investors lose:
Business Insights from Monte Carlo (1000 simulations):
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