Jan 2025 – Jun 2025 · 5 mos · Sofia, Bulgaria · On-site

• Developed and maintained ground segment mission operations software using AWS DynamoDB and AWS Lambda.
• Designed and implemented monitoring solutions with Grafana, Prometheus, and Pushgateway for Spring Boot and non-web Spring Boot applications.
• Migrated projects from Java 11 to Java 21.
• Wrote and refactored plain Java AWS Lambda functions.
• Supported Python Lambda functions.
• Mentored the team to enhance scrum refinement and planning sessions.

Aug 2011 – Jan 2025 · 13 yrs 5 mos · San Mateo, CA · Remote

• Independent contractor, doing web/enterprise/mobile applications with Spring Boot, Spring, Spring MVC, JSF 2.x, CDI, Maven, Angular, React, Vue JS
• Specializing in improving developer experience and productivity
• Performance optimization
• Enterprise integration
• Knowledge Management
• Expert Systems

Feb 2011 – Jul 2023 · 12 yrs 5 mos · San Francisco

• I was initially hired as independent contractor (1099) for a 3 weeks project.
• TRUSTe has a startup like culture, very agile and open to new ideas and technologies.
• During the years, I've influenced the architecture used in TRUSTe by introducing several technologies and architecture styles:
• Spring Framework - since Feb 2011
• Spring Boot - since Sep 2014
• Spring Cloud Data Flow - since 2018
• JPA - using Hibernate as implementation
• OAuth 2.0 - initially internal implementation ( jan 2012 ) , later based on Spring Security OAuth ( since oct 2014 )
• Domain Driven Design - The grouping of the different technical aspects around the domain concepts is contributing to high cohesion and significantly increases the developers productivity ( compared to the more traditional layered approach ).
• microservices - (since oct 2014) - used in the latest enterprise projects of TrustArc/TRUSTe
• Docker - (since oct 2014 ) - used for local development and deployment to Kubernetes
• oct 2018 - jul 2023 - project IRIS
• apr 2017 - oct 2018 - Data Flow Manager
• oct 2015 - april 2017 - Assessment Manager
• oct 2014 - sep 2015 - Privacy Assessment Manager - enterprise privacy solution.
• refactored to use Spring Boot, Angular JS,
• I've refactored the application from layered to domain driven structure. The codebase was reduced to ~50% of its original size.
• dec 2014 - jan 2015 - Authentication and Authorization Service - OAuth 2.0 provider - based on Spring Boot, Spring Security and AngularJS.
• jan 2012 - sep 2015 - Ads Compliance Manager (mobile platform) - REST service.
• Under normal conditions, the load reaches close to 1000 requests per second, the production environment is deployed on 2 Tomcat nodes.the implementation is based on the Spring Framework, JPA (hibernate) and JAX-RS (Jersey). Uses DeltaSet ( my own internal framework) for the Admin UI of the application. The Admin UI has 347 different views, the source needed to configure them is <700 lines.

Jul 2009 – Aug 2011 · 2 yrs 1 mo

• I've relocated to San Mateo, CA. The main task is to support the US activities of InterComponentWare.
• R&D in the area of Health Related Applications:
• integration with Google Health
• integration with Microsoft Health Vault
• Application of portal (jsr 286 and jsr 168) technologies in the ICW technology portfolio.
• Apache Camel integration.

Oct 2004 – Aug 2011 · 6 yrs 10 mos

• Participant in the Architecture Board Meetings ,
• Responsible for:
• web framework (introducing, supporting ) used in "LifeSensor" - personal health record.
• research and implementation of prototypes based of various new technologies (JSF, Spring MVC, GWT, Wicket, Tapestry, Grails)
• organizing, leading, defining architecture, implementation of various customer projects.
• participating in meetings with customers and partners as web expert

Apr 2001 – Feb 2002 · 10 mos

• Senior Developer responsible for designing and implementing of various small sub projects of the main application LifeSensor 6 of the company :
• Concept and Realization of General List ver 1 - inhouse ORM framework specialized in displaying lists of data, with capabilities similar to DisplayTag and iBATIS
• Concept for JavaScript Validation Framework - non intrusive js library
• Optimization of Menu sub system

Feb 2001 – Oct 2004 · 3 yrs 8 mos

• Team and technical leader of small size team - 4 people. Participating in defining, designing , implementing of various small sub projects of the main application LifeSensor 6 of the company :
• Health Summary - aggregation of data
• Login - authentication in the application and session handling
• Internal Navigation System - the menu sub system including authorization aspects
• introducing MVC for Cover pages - improving the software design of the help system

Jan 2008 – Apr 2009 · 1 yr 3 mos · Sofia, Bulgaria

• The portal, is part of the Bulgarian "NATIONAL HEALTH PORTAL AND ELECTRONIC PERSONAL AMBULATORY BOOKS" project developed by ICW and Kontrax for the Bulgarian Government, The portal is the entry point for the Personal Ambulatory Books, and offers the Bulgarian citizens immediate access to up-to-date health information, a registry of all physicians, hospitals and pharmacies. The project was awarded by The European Institute of Public Administration ( http://www.epsa2009.eu ) as "BEST PRACTICE CERTIFICATE HOLDER".
• I was responsible for the development (architecture, implementation, acceptance tests, etc.) of the Health Portal.

Jun 2006 – Jan 2008 · 1 yr 7 mos · Sofia Bulgaria

• Experience in the full life cycle of the project realization
• experience in the software development lifecycle, the domain of the application and platform
• scope estimation, planning, time management and scheduling
• resource planning, resource management, and procurement
• risk analysis, dependencies, and decision analysis skills
• presentation, communication, and negotiation skills
• team building capabilities
• deliverables based management, a focus on the delivery of customer value, in the form of executing software that meets the customer's needs.
• Used technologies:
• Apache Jackrabbit, Spring MVC, Acegi Security, Derby DB, Ajax,

Apr 2000 – Jan 2001 · 9 mos · Sofia, Bulgaria

• Creating a lot of small web projects based on PHP/MySql, Perl/MySql, ASP 3.0 / Microsoft SQL server,
• using DHTML , CSS
• participating in the full life cycle of the projects.

Jun 1999 – Apr 2000 · 10 mos · Sofia, Bulgaria

• Creating a lot of small web projects based on PHP/MySql, Perl
• using DHTML , CSS
• participating in the full life cycle of the projects.