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JEFF MARTIN JR ABAYON

FULL-STACK ENGINEER | ENTERPRISE SAAS | DATA-INTENSIVE SYSTEMS

Calgary, AB | 825-561-3509 | jmjabayon@gmail.com | jeffabayon.com

linkedin.com/in/jeff-martin-abayon-calgary | github.com/jmjabayon928

PROFESSIONAL SUMMARY

Full-stack engineer experienced in maintaining production SaaS and building enterprise platforms across five domains: cyber readiness, insurance claims, industrial engineering, healthcare, and government operations. Works across React and Next.js, Node.js, .NET, Python, Java, PostgreSQL, and SQL Server, with strengths in APIs, multi-tenant architecture, RBAC, troubleshooting, testing, and CI/CD. Founder of Turnover Ledger, a governed engineering-to-turnover readiness platform.

TECHNICAL SKILLS

Frontend: React, Next.js, TypeScript, responsive UI, SSR/ISR, forms, data-driven workflows

Backend & APIs: Node.js, Express, .NET/C#, Python/FastAPI, Java/Spring Boot, REST, authentication, RBAC

Data: PostgreSQL, SQL Server, MySQL, Oracle, MongoDB, schema design, indexing, reporting queries

Cloud & Delivery: AWS, Docker, Terraform, GitHub Actions, CI/CD, automated testing, production troubleshooting

Architecture: Multi-tenant SaaS, API integration, distributed services, auditability, lifecycle and approval workflows

PROFESSIONAL EXPERIENCE

Readiness AI - Full-Stack Engineer

Calgary, Alberta

May 2026 - Present

Delivered two feature enhancements and seven defect fixes across five technical areas since joining.
Converted six product and business requirements into improvements to the control-evidence review workflow, reducing the process from 10 steps to seven and average completion time from approximately 18 minutes to 12 minutes.
Resolved seven defects across application logic, APIs, databases, integrations, and user interfaces, reducing repeat incidents by 20% and average resolution time by 25%.
Refactored four frequently modified modules and added 16 automated tests, increasing test coverage from 60% to 73% and reducing regression defects by 25%.
Supported four successful production releases with no critical rollbacks or production incidents attributable to my changes.
Worked with a four-person product and engineering team to clarify 10 requirements and deliver more than 90% of committed work on schedule.

Calnetic - Full-Stack Engineer (Contract)

Calgary, Alberta

December 2025 - February 2026

Delivered 22 production enhancements and 12 defect fixes during a three-month engagement.
Built improvements across React and Next.js interfaces, Node.js APIs, and Supabase and PostgreSQL services, improving three customer workflows and reducing one process from nine steps to seven.
Improved authentication, RBAC, and tenant isolation across four modules, resolving three access-control and data-scoping issues.
Designed and integrated 16 API endpoints across three services, eliminating four recurring integration failure patterns.
Resolved 26 production and preproduction issues, including 12 confirmed defects, and reduced average resolution time by 25%.
Added 48 automated tests and three CI/CD validations, supporting six production releases with no critical rollbacks or production incidents attributable to my changes.
Worked with an eight-person engineering and product team to deliver 14 of 15 committed items on schedule, a 93% delivery rate.

Verum Integra, Inc. - Senior Software Developer

Parañaque City, Philippines

January 2020 - December 2021

Designed and maintained REST APIs supporting 12 core business workflows, reducing manual processing time by 30%.
Optimized SQL schemas, indexes, and reporting queries across eight high-use processes, reducing average report generation time from 10 seconds to four seconds.
Automated build and deployment activities through CI/CD, reducing the release cycle from five days to two days and deployment-related defects by 35%.
Worked with product and QA teams to deliver 13 of 14 planned releases and major features on schedule, a 93% delivery rate.

Department of Transportation - Philippines - Software Developer / Data Architect

Republic of the Philippines

April 2018 - December 2019

Consolidated 18 separate data sources and recurring reports into shared workflows, reducing manual reconciliation time from eight hours to three hours.
Developed 20 modules, reports, and automated workflows that replaced spreadsheet-based and manually coordinated processes.
Standardized 15 key datasets and report types, reducing duplicate or inconsistent records by 40%.
Supported more than 50 internal users across five offices through centralized operational and reporting access.

SELECTED PROJECTS

Turnover Ledger

Founder / Full-Stack Engineer

June 2025 - Present

Built a multi-tenant engineering platform spanning six areas and eight governed decision stages.
Implemented Release, Hold, and Escalate outcomes with reviewer separation, stale-record denial, exact-item waivers, role-based access, and auditable history.
Architected a configurable datasheet engine supporting more than 100 dynamic fields and three engineering value states.

Plant 3D P&ID Data Reconciliation Diagnostic

Full-Stack Engineer

Built six review workspaces, seven bounded reconciliation queues, and a five-step path from KPI signals to source-linked evidence.
Protected the source environment through fixed parameterized SQL Server queries, typed route contracts, bounded parsing, and zero write paths.

LCCAP Climate Planning Workspace

Full-Stack Engineer

Delivered two product phases across .NET 8, PostgreSQL, Next.js and TypeScript, and Python with FastAPI.
Implemented six core planning functions, eight Phase 2 capabilities, seven enterprise controls, and a bounded four-stage exposure workflow.

EDUCATION & PROFESSIONAL DEVELOPMENT

Bow Valley College - Software Development Diploma | Calgary, AB | June 2023

Completed training: Software Architecture: From Developer to Architect; Microsoft SQL Server 2019 Essential Training