Manidakis Marinos

Senior Software Engineer & Systems Architect
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Executive Summary

Manidakis Marinos Portrait

High-impact Senior Software Engineer specializing in high-performance system architecture, enterprise data integrations, and low-level backend optimization across C#/.NET and PHP/Laravel ecosystems. Proven track record of bridging complex third-party platforms (Salesforce, SAP ERP) with primary Property Management Systems (PMS) to achieve vendor independence and save thousands of euros annually.


A trusted technical leader who excels at eliminating cross-departmental bottlenecks, architecting enterprise security governance (RBAC/LDAP), and transforming chaotic manual processes into centralized, high-efficiency digital workflows.

Technical Expertise

Backend Development

  • C#/.NET
  • PHP/Laravel

Infrastructure & DBs

  • Docker
  • MS SQL
  • PostgreSQL
  • Query Tuning

Systems & Security

  • API Integration
  • ETL Pipeline Design
  • RBAC Frameworks
  • LDAP / Active Directory

Enterprise Platforms

  • SAP ERP (On-Premise)
  • Salesforce CRM
  • Hospitality PMS
  • Point of Sale (POS)

Professional Experience

Senior Software Engineer

Grecotel SA
Feb 2022 – Present
  • Engineered Massive ETL Performance Gains: Overhauled legacy ETL data pipelines, slashing execution times from 5–6 hours down to just 10–15 minutes (a 95%+ efficiency increase) and significantly expanding reporting analytics backends.
  • Architected & Deployed Enterprise Pipelines: Designed, built, and deployed a new, centralized ETL pipeline using C#/.NET to connect the core PMS, Point of Sale (POS) systems, and on-premise SAP ERP, enabling seamless cross-system data synchronization.
  • Delivered Strategic Cost Efficiency: Engineered custom internal integration bridges with Salesforce CRM and a mobile quick-check-in application, achieving vendor independence from costly official PMS add-ons and eliminating substantial annual licensing fees.
  • Architected Enterprise Security & RBAC: Proposed, designed, and executed a robust Role-Based Access Control (RBAC) system integrated with Active Directory / LDAP. Automated real-time permission provisioning across all application stacks, ensuring instantaneous access-level updates when personnel shift roles.
  • Digitized Financial & Budgetary Workflows: Eliminated highly fragmented legacy spreadsheet processes by building a secure, centralized web application to manage property operational structures, budget creation, and multi-tier approval workflows with strict data validation.
  • Centralized Talent Acquisition & Internal Operations: Independently analyzed, designed, and deployed an internal regional recruiting platform using PHP/Laravel connecting all business properties to the central HR department, transforming a fragmented process into a unified dashboard tracking regional hiring demands.
  • Developed Accounting & Compliance Tooling: Designed and built a custom cross-referencing and data validation tool allowing the accounting department to seamlessly audit system data against government compliance documents.
  • Proactive R&D & Architectural Prototyping: Actively researching and prototyping a next-generation workforce and resource-management system designed to seamlessly bridge core PMS, payroll, and ERP backends, providing a highly flexible, internal alternative to rigid third-party industry software.
  • Technical Advisory & Evaluation: Serve as the primary technical evaluator for prospective third-party software integrations; act as the core technical consultant for the Business Intelligence Manager to architect high-performance reporting data structures.
  • Low-Level Optimization: Refactored application code and tuned low-level MS SQL database queries to minimize compute overhead and ensure high system availability.

Full-Stack Software Engineer (Independent Consultant)

Self-Employed
Feb 2018 – Aug 2020
  • End-to-End Product Delivery: Functioned as a solo consultant architecting, developing, and deploying custom full-stack web applications and custom business automation tools for diverse clients using PHP/Laravel and relational databases.
  • Requirements Gathering & Architecture: Actively collaborated with non-technical stakeholders, translating complex business problems into concrete database schemas and technical software specifications.
  • System Integrations & Maintenance: Designed clean API integrations, managed domain/hosting infrastructure, and performed routine optimization on legacy database queries to maximize platform uptime and user experience.

Software Engineering Intern

Netmechanics SA
Aug 2017 – Feb 2018
  • Foundational Engineering: Collaborated with a team of core developers to support code deployment, minor feature development, and active bug resolution across main application stacks.
  • Code Quality & Testing: Assisted in writing clean, documented code and participated in routine code reviews to learn enterprise software development best practices and version control workflows.

Education

IEK AKMI2016 – 2018

Diploma in Information Technology

Specialization: Computer Science / Software Engineering

Completed intensive, focused curriculum specializing in software development, data structures, algorithm design, and core IT infrastructure.

University of Crete2011 – 2015

Undergraduate Studies in Physics

Completed 4 years of rigorous coursework, establishing a deep foundational background in advanced mathematics, analytical problem-solving, and complex systems logic before intentionally pivoting to Computer Science.

Continuous Learning & Drivers

  • Self-Driven Technical Advancement: Deeply committed to proactive self-education, continuously mastering modern architectures, emerging tech stacks, and low-level performance optimization strategies.
  • Active Technical Focus: Currently expanding technical depth in advanced PostgreSQL database architecture, high-availability replication, and specialized cloud infrastructure management.
  • Process Improvement Instinct: Consistently researches and adopts cutting-edge software design patterns and industry best practices to ruthlessly optimize daily engineering and operational workflows.

Let's Connect

I am currently open to discussing senior engineering placements, backend systems consulting, or large-scale data infrastructure pipeline design. Reach out directly through the verified endpoints below.

Direct Email

manidakismarinos@gmail.com

Mobile Contact

+30 694-394-4423