Developed new features to facilitate the integration of a company acquisition, the LIMINE funds administrator.Interviewed candidates applying to work in Kanastra using system design tests and take-home projects.Technologies: React, Laravel, Python, DDD, Redis, Postgres, Kubernetes

Added many new features using React/Relay and GraphQL (Ruby).Refactored the code of a job candidate portal written in React.Migrated some application modules from bare-metal to Kubernetes.Improved application logs indexation.Developed a feature on an internal library to run one-time jobs on Kubernetes.Improved IaC features using SparkleFormation.Centralized a common feature that was spread all across different modules.Interviewed candidates applying to work in Jobvite using algorithm tests.Technologies: Ruby on Rails, MySQL, PostgreSQL, Docker, Kubernetes, Helm, Kibana, Jenkins, React, Java, Spring, ElasticSearch, Logstash, Harness, Sinatra, Sparkleformation, GraphQL

Fixed bugs on the payments module.

Integrated two new payment gateways.Refactoried part of the payments context.

Integrated with a new e-invoice format, for both importation and exportation.

Developed a new API version to improve usability by using best REST practices.Created an API gateway library to build API gateways on-demand easily.Designed a sandbox solution to improve client onboarding.Helped new team members to understand the company business model and grasp the company's code rules.Technologies: Docker, Apache, Nginx, RabbitMQ, MySQL, Bash, Git, Jenkins, Jira, Domain-driven Design (DDD), AWS ECS, SlimPHP, Amazon API Gateway, API Gateways, PHP, Leadership

Gave web security training based on the OWASP standards to more than 100 colleagues.Mapped and penetration tested the entire system's attack surface to meet PCI obligations.Wrote handcrafted reports, which not only pointed security vulnerabilities but also gave instructions and best practices for mitigation.Provided specific security advice to developers teams about features they were developing at the time.Defined model risk of new features, microservices, and APIs.Managed the security vulnerabilities to meet deadlines.Tested new mitigations and security features after delivery to see if there wasn't a bypass way.Technologies: PHP, Vulnerability Management, Vulnerability Assessment, Risk Modeling, NMap, Risk Analysis, Application Security, Bash, Metasploit, Python, Ruby on Rails (RoR), Ruby

Broke a core part of a monolith into a resilient microservice, which improved the development process of adding new features.Developed a new refund solicitation UI, which improved usability.Built a new checkout microservice, improving the conversion rate by 10%.Created many reusable libraries to improve development speed and readability.Worked with old frameworks and legacy systems such as osCommerce and Tomato.Used and promulgated the domain-driven design techniques together with SOLID and Clean Code practices to improve the code maintainability.Technologies: AWS ECS, Amazon SQS, Domain-driven Design (DDD), CQRS, Event Sourcing, GraphQL, Jira, Go, Node.js, Jenkins, Git, AWS S3, AWS EC2, MySQL, MongoDB, RabbitMQ, Nginx, PHP, Docker, Apache, JavaScript

Analyzed and described requirements for the new features.Created many different features focused on each client-specific need.Developed COM objects to increase the system's functionalities through reusable components.Technologies: ActiveX, DLL, Microsoft SQL Server, Oracle, PL/SQL, JavaScript, C#, Delphi, ASP.NET, Requirements Analysis

Created a REST API on top of an existing one, improving its features without changing the old code.Developed a new UI, improving both usability and performance.Found and fixed an old bug related to concurrency that caused significant problems.Developed a new product that improved the client's overall resilience in his primary line of business.Created DLLs and COM objects to facilitate the integration of new clients.Built and implemented many important invoice-related features, such as cross-field semantic validations and digital invoice sending.Technologies: Scrum, Inno Setup, COM, ActiveX, DLL, C#, Visual Basic 6 (VB6), Subversion (SVN), Jenkins, Redmine, PostgreSQL, JavaScript, HTML, CSS, Node.js, AngularJS, Delphi