Florin Alexandru Cristian Rusu

With 10+ years of experience in backend development, I specialize in PHP (Symfony/in-house built) and architecting scalable, high-performance solutions for complex applications, particularly in e-commerce. I have a strong foundation in cloud-native technologies, leveraging AWS (SQS, SNS, S3, Lambda, Step Functions, CloudWatch, RDS) to build resilient and event-driven systems.

Key Expertise & Responsibilities:

✅ Backend Development & Architecture – Building and optimizing RESTful APIs using PHP (Symfony), ensuring clean, maintainable code.

✅ Cloud & DevOps – Deploying and managing containerized applications with Docker, Kubernetes, Helm, and Telepresence for seamless development and scaling.

✅ Search & Data Optimization – Enhancing search and data retrieval efficiency using ElasticSearch, OpenSearch, and Redis.

✅ Database Management – Designing and optimizing PostgreSQL & RDS solutions for high-performance and reliability.

✅ Testing & API Documentation – Ensuring code quality with unit, API, and feature testing, and maintaining robust documentation using Swagger / OpenAPI 3.

✅ CI/CD & Automation – Streamlining development workflows using Git Actions / Workflows for automated testing, deployments, and monitoring.

✅ Architecture documentation using C4 modeling through Structurizr, diagram and whiteboard documentation on Confluence, along with AGILE task management via JIRA

✅ Monitoring of logs and management of business critical dashboards by creation of NewRelic events and traces to query performance and identification of potential system flaws.

Major Achievements:
🏆 Optimized e-commerce platforms handling high-traffic transactions, reducing API response times and improving database performance.
🏆 Implemented containerized CI/CD pipelines with Kubernetes & Helm, reducing deployment time and increasing system reliability.
🏆 Designed event-driven architectures using AWS SQS, enhancing scalability and fault tolerance.
🏆 Led backend system refactoring, improving maintainability, performance, and adherence to best coding practices.
🏆 Certified in AWS Cloud (Cloud Quest badges), continuously expanding expertise in cloud computing and modern backend technologies.

• Developer skills used and grown:

> PHP

> Symfony

> NewRelic

> Structurizr

> GIT

> Helm

> Docker

> Kubernetes

> AWS: SQS, SNS, S3, Lambda, Step Functions, CloudWatch, RDS (+ Cloud Quest badges)

> ElasticSearch

> OpenSearch

> Telepresence

> Unit-testing / API-testing / Feature-testing

> Swagger / OpenAPI 3

> Redis

> PostgreSQL

> Git Actions / Workflows

• Development and maintenance of two android based E-Health applications 'MSing with Trauma' and 'MSing with Crowds'
• Development and maintenance of one E-Health web application 'Smart Doc Management'
• Integrate OCR application using composer libraries and python libraries
• Integrate implementation with HEROKU application - php/nginx/sql/redis integration, continuos integration (CI)

• Enhanced software functionality by identifying and resolving complex technical issues.
• Developed scalable applications using agile methodologies for timely project delivery.
• Maintained comprehensive documentation of development work, facilitating knowledge sharing among team members.
• Regularly reviewed peers'' code contributions, offering constructive feedback to enhance overall product quality.
• Development skills: PHP7.4, DDD, OOP, SOLID, PHPSTORM+SONAR
• UNIT-TESTING
• REST APIs
• SWAGGER
• DOCKER
• REDIS
• SPHINX
• JIRA / AGILE
• GIT
• SPLUNK / KIBANA / GRAPHANA

• Improved software efficiency by troubleshooting and resolving coding issues.
• Contributed to a positive team environment through effective communication, problem-solving, and collaboration skills.
• Collaborated with cross-functional teams to deliver high-quality products on tight deadlines.
• Developed software for desktop and mobile operating systems.
• Developed customized software solutions for diverse clients, resulting in increased satisfaction and repeat business.
• Main development points: PHP Framework applications (Symfony 2, Symfony 3, Symfony 5), Queue management framework: RabbitMQ; Database frameworks: mySQL, Redis, ElasticSearch; Docker applications; HTML, CSS, Javascript; Sendgrid email management e-commerce development experience.
• Developer responsibilities: create/maintain/improve features for communication notifications service app (email, sms); create/maintain/improve features about apis and document them via Swagger; provide support service on problems regarding applications use cases.

• Company Overview: http://www.dcsplus.net/
• Improved software efficiency by troubleshooting and resolving coding issues.
• Contributed to a positive team environment through effective communication, problem-solving, and collaboration skills.
• Achieved faster development cycles using Agile methodologies, including Scrum or Kanban processes.
• PHP Development of core and custom features for travel (tourism) clients
• maintenance of travel application- backend operations using REST API, SOAP API (via SOAPUI)
• front-end operations using Smarty templates
• Advanced use of PHP with Object oriented programming
• Advanced use of MySQL with PHPMyAdmin

• Delivered highly efficient code optimization techniques which reduced overall processing time across numerous software applications, enhancing end user experiences.
• Authored code fixes and enhancements for inclusion in future code releases and patches.
• Testing of database implementation
• Updated legacy systems with modern technologies, improving overall system stability and performance.
• Database maintenance
• Implementing iBeacon (Apple tool) in the company system
• Mastered tasks: PHP Development
• Back end architectures learned and used: Drupal 7, Drupal 8, CakePHP.
• Additional tasks: Front-End Developer for the clients' websites (HTML, CSS, Javascript, jQuery)
• database implementation for multiple projects (SQL, MySQL)
• creating REST API (interoperability between database structures and mobile/desktop devices)