Jonathan Demers
Verified Expert in Engineering
Software Developer
Montreal, QC, Canada
Toptal member since November 15, 2021
Jonathan is a creative, hands-on leader. He has extensive experience in software architecture across banking, finance, insurance, and R&D, delivering multiple high-profile projects. He's a strategic decision-maker with a propensity to perform in fast-paced environments and is an inspiring and highly technical model for other leaders and teams. Morgan Stanley, the Canadian Space Agency, Desjardins, and the National Bank of Canada have all benefited from Jonathan's expertise.
Portfolio
Experience
- Java - 19 years
- SQL - 18 years
- Spring - 10 years
- REST - 7 years
- OAuth 2 - 5 years
- Spring Boot - 4 years
- TypeScript - 4 years
- React - 2 years
Preferred Environment
Java, React, REST, SQL, NoSQL, OAuth 2, Node.js, JavaScript, TypeScript, Spring Boot
The most amazing...
...mobile banking and instant messaging solutions I've delivered for Thales improved the back-end performance and stability to up to 1,000 transactions per second.
Work Experience
Full-stack Developer Lead (Consultant)
National Bank of Canada
- Led an agile team of front-end, back-end, SQL, and test-automation developers.
- Recruited, onboarded, motivated, assigned tasks, unblocked, and evaluated the performance of team members.
- Advised on project estimates and delivery planning.
- Completed hands-on development on the back end, front end, and CI/CD pipeline.
Developer Lead (Consultant)
TD Bank Group
- Led teams of developers and DevOps on numerous successful enterprise projects.
- Advised the department senior director on organizational matters.
- Facilitated communications between business stakeholders and technical teams.
- Conducted hands-on development on the back end (Java and Node.js), CI/CD pipeline, and some front end.
Senior Software Engineer (Consultant)
Pstox
- Contributed to the architecture and development of the online financing platform for businesses.
- Integrated with multiple external systems, including SalesForce and Equifax.
- Contributed to the automated API test suite build with JMeter.
Senior Software Engineer and Architect (Consultant)
Various Clients
- Designed, developed, hosted, and maintained the TERNingpoint quote and policy management system for TERN Financial Group as the senior software engineer and architect (2014-2021).
- Served as a senior software engineer at Morgan Stanley. Managed a team while completing an NDA project (2015-2017).
- Contributed to the development of a new insurance policy management system with service oriented architecture (SOA back end) for Intact Insurance as the senior software engineer (2013-2014).
- Contributed to the architecture and development of the new fixed income trading platform Bond Trader for Industrial Alliance Securities as the senior software engineer (2013). Multiple system integrations included Bloomberg TOMS, CBID trading platform, and IBM ISM (SIS).
- Led back-end development of a new online trading platform (stocks, options, mutual funds, etc.) for Desjardins as the tech lead and senior software developer (2012-2013 and 2010-2011).
- Developed mobile banking and instant messaging solutions on the back end and front end (Android) for Gemalto (now Thales) as the senior software engineer (2011-2012 and 2008-2009). Improved performance and stability of the back end up to 1,000 tx/second.
- Migrated and enhanced several financial applications from the IBM ISM platform to Broadridge platform for Penson Financial Services as the senior software developer (2010).
From Intern to Senior Software Developer and Architect (Employee)
Various Employers
- Developed, architected, and customized supply chain management applications for clients. Started as a software developer in R&D and was promoted to solutions architect in the Custom Enhancement division at Tecsys (2006 - 2008).
- Created a distributed financial system for trade allocation of fixed income securities at Morgan Stanley as a systems architect (2004 - 2006).
- Built many applications for clients from CMS to custom eCommerce solutions at Logient as a software developer (2002 - 2004).
- Developed real-time software and hardware integration for an underwater robot at the Institut de recherche d'Hydro-Quebec as a software developer (2002) to inspect hydroelectric dams.
- Developed a testbed to measure the performance of spatial RF communication modules for the Canadian Space Agency as an intern (2001).
Experience
TD MyInsurance Online Service
https://www.tdinsurance.com/my-policiesThe system enabled customers to follow and manage their insurance products 24/7, enhancing customer service and satisfaction while reducing the workload on call centers.
I led back-end developers and DevOps teams for this product. I also conducted hands-on development on the back end (Java and Node.js), CI/CD pipeline, and some front end.
DevConnector - MERN Stack Front to Back
The application features additional improvements outside of the course: CORS, a front end deployed in CDN (GitHub Pages), upgraded to React Router v6, and extra bug fixes.
Education
Bachelor of Engineering Degree in Engineering
Polytechnique Montreal - Montreal, Canada
Certifications
MERN Stack Front To Back
Udemy
TensorFlow Developer
DeepLearning.AI
Deep Learning
DeepLearning.AI
Leading People and Teams
University of Michigan
Skills
Libraries/APIs
JAXB, React, Node.js, Java Message Service (JMS), jQuery, TensorFlow, Keras, Pandas, NumPy, Matplotlib, Java Servlets, Taglibs, JAX-WS, GitHub API
Tools
Jenkins, Git, Apache Tomcat, Eclipse IDE, Certbot, Apache Maven, NPM, ActiveMQ, Apache JMeter, MQSeries, IBM MQ, Ansible, PM2, Auth0, Anypoint Studio, Jira, SBT, Autosys, Jetty, Amazon Virtual Private Cloud (VPC), MATLAB, GitHub Pages
Languages
Java, SQL, Bash Script, Java 11, XML, XPath, Java 6, JavaScript, TypeScript, HTML, Web Services Description Language (WSDL), XSLT, Python, CSS, GraphQL, Scala, XSD, C++
Frameworks
OAuth 2, Spring Boot, Spring, Hibernate, JSON Web Tokens (JWT), Jakarta Server Pages (JSP), Bootstrap, Selenium, JPA, Swagger, Spring 5, Angular, OSGi, Apache Struts, Android SDK, Express.js, Redux
Paradigms
REST, Agile
Platforms
Linux, Amazon EC2, Ubuntu, Debian, Eclipse, Amazon Web Services (AWS), Docker, Oracle, WebSphere MQ, Jakarta EE (Java EE or J2EE), Red Hat Linux, Kubernetes, OpenShift, JBoss, Mule ESB, WebSphere, AIX, Heroku
Storage
JSON, MariaDB, PostgreSQL, MySQL, NoSQL, Sybase, Elasticsearch, IBM Db2, Microsoft SQL Server, IBM Informix, MongoDB
Other
Leadership, Talent Management, Team Leadership, Programming, Software Engineering, Cloud, DNS, Transport Layer Security (TLS), SOAP, Optimization, FIX Protocol, Amazon RDS, Deep Learning, RHEL, Influencers, Software, Electronics, Artificial Intelligence (AI), Machine Learning, Convolutional Neural Networks (CNNs), Natural Language Processing (NLP), Time Series, Prediction Markets, Neural Networks, Hyperparameters, Regularization, Sequence Models, Kerberos, JSch, DTD, Inertial Navigation System (INS), Kalman Filtering, QNX, Real-time Operating System (RTOS), CORS, Axios, Generative Pre-trained Transformers (GPT)
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