Gene Zeiniss
With 13+ years in the HighTech industry, including 9 years in FinTech, I specialize in building scalable, high-performance backend systems for eCommerce and financial platforms. My expertise lies in Java, Spring Boot, Microservices, Domain-Driven Design (DDD), and Relational Databases, ensuring businesses have reliable, efficient, and secure infrastructures.
Beyond my technical role, I am passionate about mentorship and community impact. I led a Backend Guild, fostering knowledge sharing and best practices across engineering teams. I also co-managed the Tech-Blogging Program at Baot, helping women in tech publish their first technical articles, and served as an Intuit Women’s Network ERG Leader, advocating for career growth and inclusion in tech.
Over the years, I played a pivotal role in architectural transformations and financial integrations, including:
✅Hybrid SDK for Sensitive Data Detection (Intuit) – Designed a Hybrid SDK that enabled dynamic configuration updates without requiring SDK version upgrades. Extracted validation logic from the SDK and represented it as mathematical expressions. This approach was secured through a patented method: Secure, Dynamically Loaded Input Validation Using Mathematical Expressions.
✅ Monolith to Microservices Transition (Behalf) – Led the company’s first microservice transition, mentored other teams, and introduced an Anti-Corruption Layer (ACL) to bridge legacy dependencies and ensure a smooth migration.
✅ Wells Fargo Integration – Engineered a seamless connection to enhance payment processing.
✅ Cross River Bank & PPP Integration – Led the integration efforts during the pandemic, enabling SMBs to access critical funding through the Paycheck Protection Program (PPP).
Now, as a freelance backend engineer, consultant, and mentor, I help businesses architect scalable eCommerce platforms, optimize payment flows, and build robust backend infrastructures tailored to their needs.
💡 What I Offer:🔹 Backend Development – Scalable, high-performance Java & Spring Boot applications.
🔹 Consulting & Mentorship – Guiding teams on architecture, best practices, and code quality.
🔹 Code Reviews – Ensuring clean, efficient, and maintainable codebases.
🔹 Public Speaking & Thought Leadership – Sharing insights on backend development, FinTech, and eCommerce.
Let’s connect! Whether you need backend expertise, consulting, or mentorship, I’m happy to help. 🚀
REVIEWS FROM CLIENTS
- Lead engineer for a Java-based application that detects sensitive data, preventing data leakage and safeguarding customer informa...
- Lead engineer for a Java-based application that detects sensitive data, preventing data leakage and safeguarding customer information. The application features a RESTful service and a Hybrid SDK designed for latency-sensitive clients. This innovative Hybrid SDK approach provides essential benefits, allowing for dynamic configuration without requiring SDK version upgrades, and enabling comprehensive auditing and monitoring of SDK usage.
- Drive Security R&D efforts, enhancing the security posture of Intuit’s financial products like QuickBooks and CreditKarma by addressing issues related to secrets leakage and weak authorization configuration.
- Design and develop highly available and low-latency distributed systems for sensitive data detection and management, including training and delegating tasks to cross-continental teams to ensure effective collaboration and project success.
- Work closely with the AI team to integrate a Named Entity Recognition (NER) model, enhancing data classification accuracy.
- Granted a patent for input validation using mathematical expressions.
- Delivered the company’s first Java Spring Boot microservice, initiating monolith decomposition and refactoring legacy systems to ...
- Delivered the company’s first Java Spring Boot microservice, initiating monolith decomposition and refactoring legacy systems to modern, scalable architectures.
- Oversaw the redesign of the Customers and Payments domains, implementing an Anti-Corruption Layer to allow a gradual transition of features from monolith to microservices, and from not-transactional database to transactional.
- Collaborated with cross-functional teams to develop highly available distributed systems for payment processing and credit services, ensuring seamless integration across engineering, product, and operations teams to deliver scalable, reliable solutions.
- Mentored peers on designing and building microservices using a Domain-Driven Design approach to ensure modularity and clear separation of concerns.
- Promoted from Junior to Senior, and led the Backend Guild, focusing on R&D training, technological growth, and backend development best practices.
Managed QA and automation for a video creation platform, ensuring scalability and performance using JMeter for automation testing.
Managed QA and automation for a video creation platform, ensuring scalability and performance using JMeter for automation testing.