Resume

Download

Semika Siriwardana (BSc in Computer Science) semika.siriwardana@gmail.com|+94713258253 Semika Siriwardana, 276/7, Boralugoda Road, Athurugiriya, Sri Lanka. www.skillshared.blogspot.com
PROFILE
Software Architect with over 15 years of industry experience in various domains and having proven skills of designing and architecting software systems with innovative solutions using latest technologies to satisfy ever-changing business requirements and diverse industries. Technologist with keen knowledge of utilizing emerging technologies for applications in order to optimize the overall project achievements. Sound knowledge in full software development life cycle, OOAD, design patterns, DDD, CI/CD, TDD. Sound skills on problems and issues identification, research and development on new technologies and frameworks, problem solving and resolution skill. Proven skills on architecting monolithic and microservice cloud native applications using Java and related frameworks and technologies
ACADEMIC QUALIFICATIONS
BSc(Second Class) in Computer Science - 2005 University of Peradeniya, Sri Lanka
MSc in Advance Software Engineering – 2020 (Reading) University of Westminster (IIT Sri Lanka)
TECHNICAL SUMMARY
Java 8, J2EE Spring Framework, Spring Boot, Spring Cloud, Spring Security, Spring Cloud Projects (Gateway, Sleuth etc), Spring security authentication and authorization. Deployment - Apache Tomcat, Docker and Kubernetes, Kustomization Spring MVC, Struts2, Servlets, JSP Streaming platforms like Apache Kafka, Apache NiFi AWS Services – AWS Developer Tools, S3, RDS, EKS, ECR etc. High available network infrastructure setup and deploy microservice application in AWS Test Driven Development - Junit, TestNG, Cucumber, Mokito GRPC, Spring Cloud Open Feign Monitoring Tools ELK, NewRelic, Elastic APM, Spring Sleuth for distributed tracing. Database - MySql, Oracle, Postgress, DB change management with Liquibase, Flyway Code quality tools like Sonar, Checkstyle, PMD, FindBug, Bugzilla. Report generating tools like iText, Jasper, Freemarker. Source Control - GIT, SVN, CVS Front end technologies - Smart GWT, Angular, jQuery, Dojo, Ext JS, jQuery mobile Build Tools - Maven, Ant, Gradle CI/CD – Jenkin, AWS Developer Tools (Code Build, Code Pipeline) ORM – JPA, Hibernate, Spring Data Jpa
ACCOMPLISHMENTS
Handling complete multistage deployment strategy for new product of KALERIS (ACM – Accessorial Charge Management). This includes developing microservice application, containerizing using Docker, orchestration using Kubernetes and deploying the applications into a high available AWS network infrastructure with load balancing. Contributed for many architectural improvements of new KALERIS microservice platform. This is the core framework for newly developing microservice based products. Technically manage the whole ShipXpress TCM engineering team around 8 years by customizing products for many customers. Implemented Facebook similar chat application using CometD for BLIMP application at EFutures Pvt LTD. Implemented security module, internationalization using spring for BLIMP application at EFutures Pvt LTD. Developed a streaming platform using Apache NiFi for the company in order to easily integrate with external system. Implemented application to view server consoler logs via web browser. Implemented full software architecture for SHIMS (Sabaragamuwa Health Information Management System). This is a multi-module project which was an excellent technology utilization of Struts2, Spring 2.5, Hibernate 3.2.[ Freelancer Project]
PROFESSIONAL EXPERIENCE
Software Architect – KALERIS	April 2021 - Present
Projects	ACM (Accessorial Charge Management): ACM is a microservice application which was developed on top of a newly build microservice platform. ACM calculates the demurrage changes of rail cars by using events (PLC, PLA, REL etc) received from different application. The microservice platform was developed so that many modules can be shared among other microservices which helps to reduce the time and enhance the code reusability.
Technologies	Java 8, Spring Boot, Spring Data JPA, Gradle, JUnit, GRPC, Kafka, Docker, Kubernetes, Angular with material design, Liquibase
Project Responsibilities	Design and architect new feature enhancements Architectural enhancements for new microservice platform. Generic approach for auditing, exception handling, i18n etc. Handling authentication and authorization. Deploying all microservices into AWS EKS cluster by writing docker files, deployment scripts. Developing security module which supports RBAC. Code reviews
Software Architect Technical Lead Senior Software Engineer - ShipXpress Inc	Feb 2012 - April 2021
Projects	ShipX Portal: ShipX portal is a web base application which allows to gain the real time visibility of the ETHANOL supply chain in USA. The system supports to create and manage contracts with the ethanol sellers and buyers and also to create shipments and nomination. The system supports frequent shipment monitoring from origin to destination to freight accruals and reconciliation. And also, the system supports to know contract ratability status, credit exposure and products available for sale in real time and all the time.
Technologies	JSP, Servlets, Struts 2, Spring 2.5, Hibernate 3, Smart GWT, AJAX, JSON, JDK 1.6, Oracle 10, Jasper Reports
Project Responsibilities	Component level design, implementation. Application deployment into clustered environment. Component level design, Implementation, Development for new features and modules. Architectural enhancements. Performance improvements. Technical Consultancy for the whole engineering team. Code reviews, Code Quality Measurements and improvements Requirements clarifications and finding solutions. Software delivery planning. Feasibility studies and effort estimation. Planning and managig team to achieve security compliances. Research and Development.
Senior Software Engineer - EFutures(Pvt) Ltd	August 2011 - Feb 2012
Projects	MARSWEB – Manage Accounts Rebalancing System: Manage Account Rebalancing System is web base application which help investment managers to find the best investment approach in a share market. Investors can maintain their own accounts and account is attached with a portfolio. A strategy can be defined by Investment Managers with some input parameters which are required by NIS optimizer. With this input parameters and data, IM’s can perform optimization and get the information about the best investment approach for each account. MARS web helps to optimize a set of accounts at once after creating an integrated bench mark portfolio.
Technologies	JSP, Struts 1, JDBC, Web Services, Axis1, Dojo, AJAX, JSON, JDK 1.6, Oracle 10, Apache tomcat 6
Project Responsibilities	Requirement clarification with communicating with client. Component level design and implementation. Performance enhancement at client side by carefully utilizing Javascript object. Developing front end UI functionalities with Dojo framework. Developing Javascript components.
Senior Software Engineer - JKCS	December 2009 – July 2011
Project	Zhara HS: Zhara HS is the all-in-one hotel management software that enables a resort or a hotel chain to run its entire operation by simply logging on to the Internet. Zhara HS has three modules, Zhara CRS, Zhara PMS and Zhara IBE. Zhara Central Reservation System is designed to manage all types of hotel bookings, whether made directly by guests at the main reservation centre, at the hotel or through travel agents and corporate clients. Zhara CRS is a fully web based solution which supports all types of reservations, individual, group, company, travel agent, multi-rate, and waitlisted. Also system allows for Processing split charges, shared reservations, negotiated rates, and rate discounts. Some of the more features comes with Zhara CRS are defining rates for room type, room category and meal plan, defining discounts and special offers on a varying basis. Ref: http://www.jkcsworld.com/zhara_crs.html
Technologies	JSP, Struts 2, Hibernate 3, Spring 2.5, EJB3, Maven2, jQuery, AJAX, JSON, FreeMarker, iReport, JDK 1.6, Jboss AS, Oracle 10
Project Responsibilities	Report generation with Jasper,iText and Free marker. Development of security module of Zhara HS product. Development of new java script component which support multiple selection and de selections items. Maintenance of Reservation module which is the major functionality of the Zhara HS product. Reservation module customization for two separate hotel chain. All the back end development of Quotation module of Zhara HS product. Source code merging from QA environment to Production, release planning, Build management with Hudson, deploying the applications into production servers. Assigning responsibilities to junior engineers and frequent monitoring their progress and support to them also reporting to project managers about the development status, issues and concern. Knowledge transfers to data base administrators to get done some complex stored procedures.
Software Engineer – Neo Info Mind(Pvt) Ltd	Feb 2009 - December 2009
Project	Mimoza for SOMPHO Insurance Co Ltd – Japan: Mimoza is a web base application facilitating to manage large number of company’s employee information and healthcare records. System registers large number of companies and branches and their employee information. System keeps track of healthcare records for each employee and analyzes that healthcare information in graphical way.
Technologies	JSP, Struts 2.1.2, Hibernate 3, Spring 2.5, JDK 1.6, MySQL
Project Responsibilities	Implementation and unit testing
Software Engineer - AXIOHELIX CO LTD, Tokyo, Japan	November 2007 - Feb 2009
Project	Semantic Web Folders (SWF): SWF is a web based database integration system for knowledge description and discovery by interferences. The SWF is based on the Resource Description Framework (RDF) which is a standardized data format for representing information on the web using an XML based syntax and support SQL like query semantics. SWF provides semantic links instead of simple hyperlinks. Furthermore, integrated search engines in heterogeneous data sources were implemented.
Technologies	JSP, SERVLETS, AJAX, JSON, JDK 1.5, Apache tomcat 6, MySQL 5
Project Responsibilities	Development and unit testing
Software Engineer - Neo Info Mind (Pvt) Ltd.	Sep 2006 - Nov 2007
Project	Kappa View – III (Kazusa Plant Pathway Viewer): Kappa View is a web based application developed for biological community to analysize the natural biological phenomena or pathways through a set of defined maps drawn using SVG. Researchers have gathered huge set of data as large text files and have drawn partially completed pathway maps using SVG. The system should retrieve all the data from the text files and complete the all the maps based on standard biological theories. Researches can upload their own data and can analyze the data using the predefined set of available maps. User also can create dynamic customized maps using available information. This system has unix form user control system.
Technologies	JSP, SERVLETS, AJAX, STRUTS 1, SVG, JDK 1.4, MySQL
Project Responsibilities	Requirement gathering with client discussion Requirement analysis and design Initial database design and implementation Modularization, module design, task assignment, module integration Implementation and testing Deploying application on client server
Computer Instructor – Information Technology Center, University of Peradeniya	May 2005 - Sep 2006
Project	E-Learning System for WHO Sri Lanka: A web based system to facilitate health professionals to learn technical stuff online. All technical materials are dynamically extracted to the web browser from a large database.
Technologies	PHP, MySQL
Project Responsibilities	Requirement gathering with client discussion Requirement analysis and design Initial database design and implementation Implementation and testing
Project	Bumf Keeper - Document Maintaining System: A client application to keep all the document information like document, file, block, rack of the administrative branch of University of Peradeniya. This includes a keyword search which helps to locate a particular document easily.
Technologies	VB6, MySQL
Project Responsibilities	Requirement gathering, design, implementation and testing.
Freelance Developer
Project	Blimp Network: Blimp is a social network system (SNS) which allows users to publish their goods and services (classifieds or blimps) into the world so that any user can particularly deal with a blimp and also the owner of the blimp. Google map is integrated with this application which allows the users to locate and exact location of the blimp owners. Application is providing Facebook similar chat application which allows blimp owners to communicate with other blimp owners. This application is compatible with all the modern browsers.
Technologies	Spring 3, Spring MVC, Hibernate, JSP, Servlets, Google Map, CometD, Maven 3, Apache tomcat 7
Project Responsibilities	Added project architectural change for exception handling mechanism Implemented Internationalization and Localization Implemented blimp maintenance screens Integrated Spring 3 security with the application Implemented Facebook similar chat using CometD Implemented an AJAX file uploader which is compatible with all modern browsers.
Project	SHIMS – Sabaragamuwa Health Information Management System: SHIMS is a web base application which has several modules to manage health department activities of Sabaragamuwa province.
Technologies	Java, Spring 2.5, Struts 2, Hibernate 3.2, jQuery, MySQL, Apache tomcat 7
Project Responsibilities	Implemented the full project architecture integrating Spring, Hibernate and Struts 2 Application design and development Implemented Java form based authentication
REFREES