Nicolae Stelian Astefanoaie

Professional Summary

Senior Backend Engineer with over 15 years of experience designing and scaling high-performance backend systems using Java, PHP, TypeScript, and AWS. Deep expertise in cloud-native applications, real-time processing, media platforms, telecom, and e-commerce integration. Strong background in Symfony, Node.js, serverless computing, Elasticsearch, and observability tools like Grafana and Prometheus. Multilingual and adaptable with international consulting experience across multiple industries.

Technical Skills

Languages

Java, TypeScript/JavaScript, PHP, SQL

Cloud & DevOps

AWS (Lambda, API Gateway, SQS, S3, Step Functions), Docker, Bluemix

Frameworks

Spring Boot, Symfony, Node.js, TDD

Databases

DynamoDB, MySQL, Elasticsearch

Monitoring & Tools

Grafana, Prometheus, Git, Redmine, SVN, Agile/Scrum

Web & API

REST, SOAP, HTML/CSS, Capistrano, XULRunner

Professional Experience

Software Engineer

Teya, Madrid

Nov 2023 – Present

Building scalable fintech solutions handling up to €1M daily in transactions
Developed secure 3DS integrations, merchant onboarding automation, and CMS plugins (WordPress, Magento, PrestaShop)
Ensured PCI-DSS compliance, API key management, and subscription handling

Software Developer

Aircall, Madrid

Jan 2022 – Oct 2023

Developed telecommunication services for call lifecycle, availability checks, and call recording
Technologies: TypeScript, AWS Lambda, DynamoDB, SQS/SNS
Enabled transcript generation and real-time monitoring

Senior Software Developer

Novabase (Consultant to Prisa Group), Madrid

Apr 2018 – Jan 2022 & Mar 2015 – Aug 2017

Migrated multimedia content to ARC XP (Washington Post's platform)
Built radio content automation with ad-detection and audio translation
Led integration with Alexa, Google, and Apple Podcasts
Reduced CDN costs by 40% via migration from Akamai to S3/Fastly

Senior Software Developer

IBM, Madrid

Aug 2017 – Apr 2018

Internal analytics system using Elasticsearch, MySQL, Bluemix, and Grafana
Built data aggregation tools from APIs, logs, and Excel for dashboards

Software Developer

Pipeline Software, Madrid

Jan 2019 – Dec 2020 (part-time) & Jul 2012 – Mar 2014

Developed and optimized booking engine (OrbisBooking.com) using Gearman, PHP, MySQL
Balanced load using MySQL replication and integrated APIs (flights, insurance)

IT Team Lead

Romanian Border Police, Otopeni Airport

Dec 2005 – Apr 2011

Managed 8-person IT team, led national Schengen integration project
Administered systems using FoxPro, MySQL, PHP, Linux, Windows Server

Certifications

AWS Serverless

Amazon (2022)

Certified Symfony 3 Developer

SensioLabs (2018)

Algorithms Specialization

Coursera (2019)

PHP 5.3 Certified Engineer

Zend Technologies (2010)

Education

BS in Computer Science

Faculty of Computer Science
University A.I. Cuza, Iași, Romania
(1999–2003)

High School – Accounting and Finance

Colegiul Economic "Octav Onicescu"
Botoșani, Romania
(1995–1999)

Languages

Romanian

Native

English

Professional

Spanish

Full Professional

Additional Experience

Senior Software Developer - PromoTouch Global, Madrid (May 2014 – Mar 2015)
Developed retail and smart display applications using PHP, JavaScript, Ansible, TDD

Software Developer - Genexies Mobile, Madrid (Mar 2014 – May 2014)
Built mobile-focused web solutions for Movistar and Vodafone using Symfony, Ruby, Capistrano

Software Developer - Dejavu Arts, Madrid (Apr 2011 – Apr 2012)
Developed and maintained e-commerce sites with Magento, Prestashop, Joomla

Junior Software Developer - Petar Computers, Romania (Feb 2005 – Dec 2005)
Developed document management tools using C#, .NET Framework 2.0, SQL Server