Yiannis Ioannidis

• Pylon ERP customizations, integrations, and platform services for OneBusiness customers and internal products.
• Designed and delivered the OneBusiness internal ticketing system for productivity measurement and client charging.
• Implemented Pylon integration with fuel‑station software, e-Shops and multiple third‑party APIs to automate operational and billing workflows.
• Architected Aspire‑based orchestrators for PayPal/Stripe payment‑link creation with ERP reconciliation, Google Maps routing integration for backend workflows, and Dias RF payment distribution.
• Built MCP Server for centralized Pylon schema metadata management and runtime discovery to accelerate integrations and ensure consistent contracts.
• Initiated an AI‑driven business classification pipeline using website embeddings, semantic search, and LLM reasoning to automate client profiling and routing; defined a hybrid RAG + embedding approach for accuracy and explainability.

Project Manager (external contractor), 05/2025 to Present
Protergia (Metlen) – Athens

• Led a six‑member cross‑functional team responsible for support, incident resolution, and small enhancements for the Galaxy billing system.
• Managing the end‑to‑end migration to the new billing platform, owning data mapping, validation, reconciliation, cutover planning, and post‑go‑live stabilization activities (in-progress).

• Led and motivated VAS Development team (16 professionals) & DWH Development team (4 professionals).
• Successfully delivered tasks within tight deadlines.
• Collaborated with cross-functional teams to achieve project goals.
• Managed IT projects from inception to completion.
• Defined project scope, allocated resources, and set timelines.
• Conducted performance evaluations and provided feedback.
• Installed modern technologies without disrupting workflow.
• Recommended upgraded technologies to meet evolving business requirements.
• Used critical thinking to break down problems, evaluate solutions and make decisions.
• Oversaw the entire incident management process, from identification to resolution.
• Managed technology resources within department budgets.
• Addressed compliance requirements (e.g., data privacy, security).
• Assessed potential vendors for software and services.

• Optimized multi-project, multi-team performance with long-term plans, increasing productivity by 25%.
• Supervised and mentored programmers, designers, and technicians, monitoring performance against targets.
• Improved software performance and usability, reducing bugs by 20% with guidance and feedback.
• Designed and developed robust framework using Blazor (.NET 7.0) for web application development and Xamarin/MAUI for mobile development.
• Implemented custom Object-Relational Mapping (ORM) to increase development speed and efficiency.
• Implemented DevOps practices by introducing source control and issue tracking systems, resulting in improved collaboration and productivity.
• Conducted research on various DevOps tools and selected appropriate systems based on team's needs and requirements.
• Created and managed Team Foundation repositories and integrated them with team's workflow, resulting in streamlined version control and code sharing.
• Introduced JIRA as issue tracking system to manage and track project tasks, ensuring timely and efficient delivery of features and bug fixes.
• Trained team members on new systems and provided ongoing support, resulting in improved adoption and utilization of DevOps practices.
• Actively participated in cross-functional team meetings to discuss potential system solutions and client requirements, providing valuable input that led to successful project completion and enhanced collaboration.
• Streamlined processes with contributions to team meetings, ensuring project success.
• Delivered regular updates to management and clients, keeping stakeholders informed on progress, deadlines, and enhancements.

• Supervised, trained, and mentored team of 10+ engineers to meet product quality, performance, and delivery goals.
• Conducted regular code reviews and provided feedback to team members, promoting culture of continuous learning and improvement, resulting in increased team performance and productivity.
• Designed and implemented Pylon Service, Picking Packing, Rebates, Orders' Processing, and Budget modules.
• Developed enhancements and tools for Pylon framework, improving software performance and usability.
• Implemented Schema Designer tool, leading to 75% increase in team productivity.
• Managed requirements, scopes, resources, and schedules for multiple clients' projects.
• Collaborated with cross-functional team to analyze system solutions based on evolving client requirements.
• Recruited and trained 15+ team members, ensuring high-quality software delivery.
• Trained and supported external developers, improving their performance and skills.

• Led 8+ engineers to drive productivity and efficiency.
• Designed and developed custom solutions and integrations with third-party systems for Galaxy ERP, increasing client satisfaction by 25%.
• Trained partners' developers and technical consultants, improving collaboration and issue resolution.
• Participated in cross-functional team meetings, providing input for successful project completion and enhanced collaboration.
• Conducted regular performance reviews, implemented improvement plans, and mentored team members.
• Prepared and delivered technical presentations at Annual Partners' Meeting events, increasing partner satisfaction and retention.
• Represented company at industry conferences and events, networking with peers and gathering valuable insights.