Mark Joseph Zaballero Estareja

Senior Full Stack Developer at Prudential Singapore (One North Consulting Pte Ltd)

Led full-stack development for Insurance Services; acted as technical lead for the development team; guided and mentored juniors; coordinated with stakeholders to align technical implementation with business goals; ensured seamless integration of front-end and back-end systems; designed complex workflows, data models, and distributed systems; implemented integrations with insurance data providers and payment gateways; built responsive UIs with modern frameworks and ensured accessibility; developed and optimized REST APIs and server-side rendering as needed; maintained comprehensive documentation of systems, APIs, and workflows.

Part Time Software Engineer L2 at PayMaya/Maya Bank Inc

Participated in Agile ceremonies; designed, developed and tested core functionalities of credit card system, including transaction processing, billing cycles and statement generation; wrote modular code for payment authorization, settlement, and reversals; conducted unit, integration and end-to-end testing; resolved production issues under tight deadlines; collaborated with QA, DevOps and product managers to deliver robust solutions.

Packaged App Development Senior Analyst at Accenture Inc.

Designed, built, and configured packaged applications to meet TOPDANMARK's business processes; implemented best practices in SDLC, CI/CD, and DevOps; participated in client demos and knowledge transfer; trained new resources; conducted code reviews to uphold quality and standards; contributed to performance and integration testing; maintained documentation and supported ongoing improvements.

IT Instructor at PHINMA Saint Jude College

Part-time IT Instructor responsible for delivering IT curriculum, creating lesson plans, assignments, and assessments; provided student progress reports; advised at-risk students; kept current knowledge to illustrate concepts; monitored attendance and classroom activities; designed a project-based end-of-year project aligned with curriculum.

Senior Application Development Analyst at Accenture Inc.

Contributed to MOE Singapore applications using Java, J2EE, Oracle SQL, Jasper Reports, Jenkins, Microservices, Gerrit, Git, Jira, Eclipse, WebLogic, Putty, DevOps, WinSCP, AWS, Jasper Server, Spring Framework, Teradata, ReactJS, AngularJS, NodeJS; participated in Agile/Scrum ceremonies; implemented DevOps practices, including CI/CD; performed testing and documentation; supported Teradata databases; collaborated with cross-functional teams to deliver robust education solutions.

Software Developer at Trend Micro

Implemented and maintained automated tests; enhanced test automation frameworks for functional and system tests; optimized API response times with caching and asynchronous processing using FastAPI and Golang; built dynamic UIs with ReactJS and VueJS to deliver responsive user experiences.

Freelance Full Stack Web Developer at AMRI Web Portal Services Corporation

Created website layouts and UIs with HTML/CSS/JS; integrated data from back-end services and databases; documented service requests and incidents; designed, built, and configured applications to meet business requirements; participated in code reviews; implemented CI/CD; conducted performance testing; produced technical documentation.

Freelance Full Stack Web Developer at Self Employed

Developed full-stack web applications with a focus on clean, maintainable code; created responsive UIs; integrated back-end services and databases; produced client documentation and deliverables; collaborated with clients to meet business needs; adhered to best practices in coding and deployment.