Junior Backend Developer with experience in data-heavy enterprise environments, workflow automation, and backend fundamentals. Strong analytical background from accounting and system-oriented operations roles.

Thomas Sioumpalas

Junior Backend Developer with experience in data-heavy enterprise environments, workflow automation, and backend fundamentals. Strong analytical background from accounting and system-oriented operations roles.

Available to hire

Junior Backend Developer with experience in data-heavy enterprise environments, workflow automation, and
backend fundamentals. Strong analytical background from accounting and system-oriented operations roles.

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Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
See more

Language

Greek, Modern
Fluent
English
Fluent
Chinese
Advanced

Work Experience

Junior Developer at CloudOn – SoftOne Technologies
December 1, 2025 - Present
Improved feature performance and stability through code refactoring, debugging, and efficient resolution of customer-reported issues. Design and implement customer-facing integration services. Manage Backend Development and API Architecture of cloud-based Web Application.
Accountant at Lubricants and Petroleum Corporation (LPC) / Motor Oil Group (MOH)
December 1, 2024 - December 1, 2025
Worked with large structured datasets, applying validation logic, reconciliation rules, and error-handling to backend data processing. Designed standardized reporting outputs, reflecting data modeling and structured formatting concepts used in ERP. Introduced basic workflow automation steps, demonstrating process with logical thinking, and efficiency-oriented problem solving.
Governing Board Member – Process Optimization & Digital Outreach Lead at INEFAN (NGO)
January 1, 2023 - June 1, 2025
Built and maintained the company’s WordPress website using Elementor and OceanWP, configuring plugins, implementing PHP-based subscriber handling, and troubleshooting JavaScript/jQuery library behaviours for interactive UI elements. Used CRM systems (HubSpot) and analytics tools, for pipeline state management, and UI-driven data flows. Coordinated cross-team communication, reflecting agile collaboration and stakeholders requirement gathering.
Executive Administrative Assistant / Expense Auditor at HotelBrain Group
January 1, 2024 - November 1, 2024
Audited financial entries using rule-based validation, aligning with backend input validation and exception handling. Reduced financial errors by 72.6% through redesigned controls and SAP ERP monitoring.
Manager of F&B Department at European Youth Parliament (Non-profit)
January 1, 2022 - December 1, 2022
Managed logistics and budgeting for sponsorship revenue (€5,126+), ensuring accurate reporting and cost alignment. Applied OPEX/CAPEX forecasting methods for resource planning.
Operations Trainee at Protergia / Metlen (Mytilineos) Group
January 1, 2021 - June 1, 2022
Analyzed CRM workflows and KPIs through data querying, reporting evaluation, and system performance testing. Supported ERP digital rollout by creating technical documentation, UX flow mapping, and assisting teams with system adoption and onboarding.

Education

Software Engineering & Accounting Information Systems at International Hellenic University
January 11, 2030 - September 1, 2025
MicroMasters Program in Finance at MIT Sloan University
January 1, 2023 - January 10, 2026

Qualifications

Diploma in IT – DataLabs SA
May 1, 2025 - February 1, 2026
Artificial Intelligence Program EITCA/AI - EITCI Institute ASBL
September 1, 2025 - September 1, 2026
Artificial Intelligence in Finance - WorldBank Group
January 11, 2030 - January 10, 2026
Digital Currency / Blockchain Underlying Technology - University of Nicosia
January 1, 2024 - June 1, 2024
ERP Consultant - SoftOne Technologies SA
March 1, 2023 - June 1, 2023

Industry Experience

Software & Internet, Professional Services, Manufacturing, Energy & Utilities, Non-Profit Organization, Education

Experience Level

Expert
Expert
Expert
Expert
Expert
Expert
Expert
Intermediate
Intermediate
Intermediate
See more