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Diamantis Kyriakakis

@diamantiskyriakakis

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Principal Backend Architect specializing in distributed systems, platform modernization, and applied AI automation.

Greece

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What I'm looking for

I’m looking for a principal backend role where I can modernize long-lived distributed platforms—zero-downtime migrations, real-time messaging, and production-grade observability—while applying AI/LLM-assisted automation to reduce manual ops and improve reliability.

I’m a hands-on backend engineer and principal-level systems architect with 20+ years building distributed, high-reliability platforms across telecom, fintech, and automation-heavy environments. I lead with architectural judgment while staying deeply credible in implementation.

As Chief Technology Officer & Lead Architect, I led technology direction across telecom infrastructure, backend systems, networking, and AI initiatives. I built an in-house signaling and messaging foundation that reduced third-party dependency and improved profitability by 9x.

I architect and evolve high-throughput distributed messaging and routing systems in Rust, using controlled rollouts, progressive traffic shifting, and zero-downtime migration patterns. I also design ML and LLM-assisted operational workflows for anomaly detection, traffic protection, and real-time remediation—reducing manual intervention and cutting customer complaints by 70%.

Earlier, I architected and built a white-label multi-level SaaS reseller platform and delivered production-grade Node.js systems, including a complete SMPP server with billing, routing, spam filtering, and multi-uplink support. I currently provide independent technical advisory and compliance/reporting tooling for a financial platform modernization effort, integrating external financial services under strict regulatory constraints.

Experience

Work history, roles, and key accomplishments

CTO & Lead Architect

MobiWeb Ltd

Nov 2012 - Apr 2026 (13 years 5 months)

Led technology direction across telecom infrastructure, backend systems, networking, and AI initiatives while staying deeply hands-on. Built a signaling/messaging foundation that improved profitability by 9x; architected distributed routing delivering 3x throughput with lower memory, and designed ML/LLM-assisted operational workflows that reduced manual intervention and cut customer complaints by

Rust Distributed Systems Redis

Independent Technical Advisor

DirectPay.gr

Apr 2024 - Jul 2025 (1 year 3 months)

Provided external architecture and technical advisory for a financial platform modernization effort, leading technical discussions with contracted engineering teams. Built compliance and reporting tooling and integrated external financial services under strict regulatory constraints.

Technical Advisory Systems Architecture Compliance Reporting Backend Engineering

Senior Software Engineer

MobiWeb Ltd

Jul 2007 - Nov 2012 (5 years 4 months)

Architected and built a white-label multi-level SaaS reseller platform with multi-currency billing and an extensibility model for large reseller hierarchies. Developed production-grade Node.js SMPP server with billing/routing/spam filtering and multi-uplink support, and delivered a distributed bulk-calling platform coordinated with ActiveMQ and FreeSWITCH.

ActiveMQ Freeswitch Multi Currency Billing Distributed Bulk Calling Systems Architecture

Senior Software Engineer

Conexus

Jan 2003 - Jan 2007 (4 years)

Developed a hotel PBX and workflow system in Java and Asterisk, combining billing, alerts, notifications, and operational control that remains in production. Delivered client POS/mobile applications and related software projects, building early foundations in systems integration and customer-facing delivery.

Java Asterisk Workflow Automation Alerting System Integration