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I am a Senior Mobile & Frontend Software Engineer with over six years of experience delivering high-performance applications across telecom, fintech, and enterprise domains. I have a proven track record of leading cross-functional teams and delivering production-critical systems with strong quality metrics, including 95%+ on-time delivery, 85%+ Sonar quality, and 98% defect resolution. I specialize in React Native and modern frontend architectures, with a strong focus on performance optimization, scalability, reliability, and end-to-end ownership in demanding environments. I enjoy building reusable component libraries, shaping robust mobile and web architectures, and driving teams toward sustainable, high-quality releases.…I am a Senior Mobile & Frontend Software Engineer with over six years of experience delivering high-performance applications across telecom, fintech, and enterprise domains. I have a proven track record of leading cross-functional teams and delivering production-critical systems with strong quality metrics, including 95%+ on-time delivery, 85%+ Sonar quality, and 98% defect resolution. I specialize in React Native and modern frontend architectures, with a strong focus on performance optimization, scalability, reliability, and end-to-end ownership in demanding environments. I enjoy building reusable component libraries, shaping robust mobile and web architectures, and driving teams toward sustainable, high-quality releases.

Efthymios Pegkas

Front-End Developer, Web Developer, App Developer, +4

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I am a Senior Mobile & Frontend Software Engineer with over six years of experience delivering high-performance applications across telecom, fintech, and enterprise domains. I have a proven track record of leading cross-functional teams and delivering production-critical systems with strong quality metrics, including 95%+ on-time delivery, 85%+ Sonar quality, and 98% defect resolution. I specialize in React Native and modern frontend architectures, with a strong focus on performance optimization, scalability, reliability, and end-to-end ownership in demanding environments. I enjoy building reusable component libraries, shaping robust mobile and web architectures, and driving teams toward sustainable, high-quality releases.…I am a Senior Mobile & Frontend Software Engineer with over six years of experience delivering high-performance applications across telecom, fintech, and enterprise domains. I have a proven track record of leading cross-functional teams and delivering production-critical systems with strong quality metrics, including 95%+ on-time delivery, 85%+ Sonar quality, and 98% defect resolution. I specialize in React Native and modern frontend architectures, with a strong focus on performance optimization, scalability, reliability, and end-to-end ownership in demanding environments. I enjoy building reusable component libraries, shaping robust mobile and web architectures, and driving teams toward sustainable, high-quality releases.

Available to hire

I am a Senior Mobile & Frontend Software Engineer with over six years of experience delivering high-performance applications across telecom, fintech, and enterprise domains. I have a proven track record of leading cross-functional teams and delivering production-critical systems with strong quality metrics, including 95%+ on-time delivery, 85%+ Sonar quality, and 98% defect resolution.

I specialize in React Native and modern frontend architectures, with a strong focus on performance optimization, scalability, reliability, and end-to-end ownership in demanding environments. I enjoy building reusable component libraries, shaping robust mobile and web architectures, and driving teams toward sustainable, high-quality releases.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Language

English

Fluent

Work Experience

Principal Architect / Software Engineer at Netcompany Group A/S (EU) – Athens, Greece

October 1, 2024 - Present

Led production-level B2G projects across 5+ countries under strict SLAs. Managed a cross-functional team of 11 engineers across 4 parallel releases, achieving 95.5% on-time delivery. Improved code quality to 85%+ Sonar rating across 8 applications. Designed scalable micro-frontend architecture and reduced technical debt through reusable component libraries and POCs. Drove release visibility with structured reporting and contributed to the hiring pipeline.

Mobile Technical Lead Engineer (React Native) at Netcompany Group A/S (Vodafone UK) – Greece / Denmark

November 1, 2023 - October 1, 2024

Led development and production delivery of a cross-platform iOS & Android Travel eSIM application. Owned full SDLC (design → development → release) with telecom-grade reliability. Optimized mobile performance, reduced production incidents, and coordinated distributed teams. Delivered POCs to accelerate feature validation and enhanced QA processes to raise release quality.

Lead Android Engineer at Netcompany (EU Commission – EUIPO)

June 1, 2023 - November 1, 2023

Delivered production-ready native Android application within tight Q4 go-live deadlines. Led engineering team ensuring high-quality releases under strict compliance. Improved performance via optimized state management and reduced risks through test-driven development and proactive issue resolution. Maintained stakeholder alignment through structured reporting and risk mitigation.

Lead Frontend Engineer (Digital Banking Platform) at Netcompany Group A/S

November 1, 2021 - June 1, 2023

Led development of an enterprise Digital Banking platform deployed in production. Delivered a white-label solution enabling scalable multi-client architecture. Achieved 85% client satisfaction and reduced post-release refactoring to 15%. Resolved 98% of UAT observations and designed modular architecture to improve scalability. Managed CI/CD pipelines for stable multi-environment releases and fostered collaboration across frontend, backend, and stakeholders.

Senior Software Engineer at Netcompany Intrasoft Intl

November 1, 2021 - November 1, 2022

Contributed to large-scale Digital Banking systems with high availability requirements. Developed scalable frontend architectures and REST API integrations. Improved reliability and performance through optimized design patterns and delivered features within monorepo environments.

Senior Software Engineer at Quintessential

March 1, 2021 - October 1, 2021

Delivered multi-platform B2B applications for nationwide clients. Improved application performance through modern architecture design and reduced development bottlenecks via efficient task decomposition. Designed scalable and maintainable frontend systems.

Frontend Software Engineer at Programize LLC

September 1, 2019 - June 1, 2020

Delivered applications for major clients (UCLA, Pittsburgh University). Built scalable SPA and mobile applications using React / React Native. Integrated multiple third-party systems, maintained stable deployments, and improved delivery efficiency within Agile teams.

React Native Developer at UMI Systems

December 1, 2019 - March 1, 2020

Delivered mobile features for Drive Kyte application. Improved performance through targeted optimizations and managed deployment pipelines to ensure reliable releases. Contributed to product redesign enhancing usability and performance.