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Ayoub Sayah
Ayoub Sayah

Senior Full Stack Developer | Frontend Specialist

Open to offers · Member since 18 Sep 2026
Message
Location
Porto, Portugal
Desired salary
Unspecified
Work preference
Remote Only / Full Time, Freelance
Experience level
Senior

About

Professional summary

I am a senior full-stack developer and frontend specialist with more than six years of experience building banking, fintech, SaaS, and enterprise web products for over 10,000 users.

I specialize in React, Angular, Vue.js, TypeScript, Node.js, and NestJS. I build accessible, high-performing interfaces and scalable backend APIs, with particular experience in multi-tenant systems and critical financial workflows.

I focus on measurable product quality through performance optimization, bundle reduction, WCAG accessibility, API standardization, and robust testing strategies using Jest and Cypress.

I have delivered solutions for banking institutions, microfinance platforms, workflow automation products, e-commerce, and real-time freelance marketplaces. My work includes architecture design, frontend modernization, dynamic form workflows, and real-time collaboration features.

I enjoy defining technical standards, mentoring teams, and translating complex business requirements into reliable, maintainable software. I am currently based in Porto, Portugal, and hold a D3 Visa.

Skills

26 capabilities
AccessibilityAgileAngularAPI DesignArchitecture DesignBackend DevelopmentCI CDDatabase DesignFrontend DevelopmentGraphQLJavaScriptMentoringMicroservicesNestJSPerformance OptimizationReactReal Time ApplicationsSystem DesignTechnical LeadershipTypeScriptUnit TestingVue.JsWeb DevelopmentWeb PerformanceWebSocketsWorkflow Automation

Tech stack & tools

Working toolkit

Application Utilities

Swagger

Data Stores

MongoDBPostgreSQL

Design

Storybook

Development

DockerGitJest

Languages & Frameworks

AngularBootstrapGraphQLJavaScriptNestJSReactTypeScript

Libraries

Redux

Experience

Career history

Senior Full Stack Developer ServicePower

Designed and deployed a Cypress end-to-end testing strategy covering 80% of critical multi-tenant workflows. This eliminated production regressions and established a quality foundation used by more than 15 client teams.

Designed and integrated a Kiro AI orchestration system for workflow automation and task routing, reducing merge request review time by 50%. Integrated Swagger documentation and standards for more than 90 API endpoints to improve onboarding and long-term maintainability.

Frontend Developer Proxym-IT

Delivered React, TypeScript, and Chakra UI banking interfaces used by more than 10,000 users with zero downtime during peak usage. Built an AI-powered Formio form generator to accelerate dynamic workflow creation for client teams.

Migrated state and server-data management from Redux to React Query, reducing boilerplate by 30% and API calls by 25%. Improved application performance through code splitting and lazy loading, achieving a 50% bundle reduction, and implemented Jest, Cypress, and Storybook practices that reduced production bugs by 30%.

Junior Frontend Developer Alfaprint

Delivered a React and Bootstrap e-commerce platform with a Google PageSpeed score of 99%. Focused on mobile-first user experience and performance improvements that contributed to measurable conversion-rate improvement.

Collaborated on frontend implementation and responsive interface delivery while ensuring fast page loading and maintainable component development.

Full Stack Developer Intern Children's Club Platform

Built an end-to-end platform using Angular, Express.js, and MongoDB for managing children's activities. Implemented account management, activity scheduling, and parent-child messaging workflows.

Supported a platform serving more than 50 test users and gained hands-on experience delivering integrated frontend, backend, and database functionality.

Freelance Full Stack Developer ExtraExpertise

Designed and developed a full-stack freelance platform using React, Node.js, NestJS, PostgreSQL, and WebSocket technologies. The platform connected clients and professionals through project-management and secure-payment workflows.

Implemented real-time notification and collaboration capabilities with WebSockets, while designing scalable NestJS backend services to support user growth and transactional reliability.

Education

Learning history

EPI Sousse

Engineering Degree, Computer Science

Engineering Degree in Computer Science.

Sousse Higher Education Institute

Bachelor's Degree, Computer Science

Bachelor's Degree in Computer Science.

This professional hasn’t added portfolio projects yet.

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