Senior FullStack Engineer
Lisbon, Portugal
#OpenToWorkFeras is a senior full-stack engineer with over 15 years of experience in software development, including roles at OWNR GMBH, Marillo.ai, and other companies. He has worked on building data orchestration platforms, AI systems, and backend services using technologies like NestJS, GraphQL, and AWS. His key skills include Typescript, Reactjs, Java, Spring Boot, PHP, Swift, AWS, GCP, GraphQL, Terraform, AWS CDK, MCP, and AI Chaining/Functions. He has achievements such as launching Badil.io and building apps like YaBulursam and La Kasa, along with mentoring in entrepreneurship. Based on his career, Feras is well-suited for senior full-stack engineering or product engineering roles in tech companies, particularly those involving cloud infrastructure, AI, and full-stack development.
Product Engineer where my role is beyond writing code; receiving inputs from stakeholders and creating creative solutions that meets the requirements
Marillo.ai
Built an AI system that converts natural language into SQL and executes queries on user databases using NestJS/React. Engineered a Docker-based containerized architecture for secure, isolated query execution. Implemented CI/CD pipelines and a token-based billing system with payment integration. Delivered real-time results as tables, CSVs, and charts with zero data retention.
Self Employed
Designed and developed websites using PHP and WordPress, including custom plugin development to extend functionality and improve performance. Delivered client projects by translating requirements into responsive, scalable web solutions. Built personal side projects to explore new technologies and strengthen full-stack development skills.
Dama Dev
Led development of a GraphQL backend for a GPS-based mobile app enabling real-time location tracking and communication. Built scalable architecture using WebSockets, AWS Lambda, Firebase, and Expo. Also contributed to Drupal and WordPress systems, improving CMS functionality and workflows.
Aljazeera
Researched and authored technology content for Al Jazeera on innovations including Face ID, IPv6, and OLED, and developed the company’s portal using PHP and Drupal.
Finbyte GMBH
As a Fullstack Developer, I worked across the stack, building and maintaining backend services with NestJS and GraphQL. I managed infrastructure deployments using Terraform and GitHub Actions, and contributed to the React Native mobile app, including deep linking implementation and component development. I was also involved in creating a Buy Now, Pay Later (BNPL) solution and integrating systems in compliance with PSD2 regulations for a local bank.
Stowk Inc.
As a Backend Developer, I built and maintained Express.js and GraphQL services, managing deployments through the Serverless Framework, AWS CodePipeline, CircleCI, and GitHub Actions. Worked within a stack featuring Node.js, MongoDB, and React, ensuring reliable backend performance and smooth CI/CD automation.
OWNR GMBH
At OWNR, I built a data orchestration platform that unified information from Salesforce, the company’s CMS, and various AWS services, enabling seamless property data synchronization across systems. Using NestJS, GraphQL, and AWS CDK for infrastructure as code, I helped automate data flows and improve reliability. I also maintained and enhanced the Next.js frontend, ensuring a consistent and efficient experience for real estate data management.
Nano Degree · iOS Development
Bachelor of Computer Science (Hons) · Mobile Computing
