Stelios Lambros

1. Remote work-study illustrating recent web development toolkits and multiple remote collaboration tools.

1. Resumed earlier 2016-2019 role at the company. Tech stack updates: Java 11, Spring Boot, Cloud migration

1. Developed workflows with Java / Spring Boot to capture data modifications in a legacy sports betting platform, synchronizing transactions with a modern REST API for legacy system compatibility during phase-out. Collaborated with external colleagues remotely, including data schema experts and quality assurance teams.

Tech Stack: Java 8, Spring Boot, older legacy Spring Framework, Eclipse IDE, VS Code, Git, Shell Scripting, pgAdmin for PostgreSQL.

1. Assigned to the on-site developer team at client Cosmote Telekom's premises. Built a Spring Boot utility to extract, transform and aggregate structured SQL data from the client's Dynatrace installation and its internal ElasticSearch datastore via its REST API

Tech Stack: Java 8, Spring Boot, Eclipse IDE, Apache Kafka, MySQL, GNU/Linux, Shell Scripting

1. Lead developer of a custom user-facing web application for interfacing with Docusign digital signature devices. Application customized for, and deployed to, affiliate company Adacom (https://aqs-portal.adacom.com) and JCC Payment Systems (https://trust.jcc.com.cy).
2. Developed Java Server Faces front-end modules for the company's in-house batch document generation system, “i-docs”, gradually replacing most of the older Google Web Toolkit UI modules

Tech Stack: Java 7, Spring Framework (MVC, Data, Security, Batch), JSF/PrimeFaces, Google Web Toolkit, SOAP & REST APIs, Swagger, SoapUI, PKI, Apache Tomcat, SSL Certificates, JBoss/Wildfly, XML, Apache PDFBox, Eclipse IDE, Git, Jira, Multi-module Maven build scripts, Jenkins CI

(Approx. eight years total full-time equivalent software engineering experience, under OAEE/TEBE contractor status)

1. Modernized legacy reporting systems for the Public Power Corporation (PPC), replacing an MS Access application with a .NET client-server application (VB.NET, WinForms, SQL Server, Crystal Reports) used for KPI monitoring across power-generation units.
2. Migrated desktop reporting modules to an ASP.NET-based MIS portal, implementing new visualization components and a custom Single-Sign-On mechanism integrating JSP and ASP.NET modules.
3. Conducted extensive on-site requirements analysis with engineers, managers, and data-entry employees across Athens and regional PPC sites.
4. Designed and delivered a lignite mining tracking system for PPC's Lignite Mining Division, including SQL data modeling of mining processes, daily/monthly data-entry workflows, and automated reconciliation logic aligning daily estimates with monthly measured totals.
5. Developed a data-integration module for a proprietary SCADA system, reading its time-series database via custom SQL syntax and transferring aggregated operational metrics into a SQL Server schema of our own design.
6. Worked on additional engineering tasks in usability evaluation, workflow digitization, configuring VPNs, Datacenters and Firewalls.
7. Participated in public-private academic EU research projects via the University of Athens.
8. Self-taught and trained new hires in Java technologies to develop proof-of-concept web and mobile applications for Benefits Science LLC, in healthcare analytics, airport delay modeling, and nutritional planning (JavaEE, GWT, CoronaSDK)