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Essabri Zakaria

@essabrizakaria

Full-stack software engineer at Leyton CognitX building workflow automation, OCR verification, and AI-powered platforms.

Morocco

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At Leyton CognitX, I develop a full-stack platform for CAE and operations workflows, including configurable approvals, dashboards, document handling, and third-party integrations. I also engineered a mobile app for operations installer users with push notifications.

I built an embeddable assistant widget and an admin console at Leyton CognitX, integrating LLM capabilities and project-scoped RAG with citations. At Leyton, I developed a Keycloak security starter that reduced integration time from several weeks to a few minutes.

At Leyton, I also collaborated with a data science team on an OCR application and implemented verification results returned through RabbitMQ. At XayOne, I worked on CIAM and trust services, including multi-factor authentication and migrations from Java 8 to Java 17.

Experience

Work history, roles, and key accomplishments

Current

Full-Stack Workflow Automation & Operations Platform

Current

Leyton CognitX

May 2025 - Present (1 year 6 months)

Developed a full-stack internal SaaS platform for managing CAE/operations workflows, including configurable workflow orchestration, real-time notifications, role-based dashboards, and AI agent integration. Engineered a mobile app for installer users and an OCR-based document verification module.

Full-Stack Multi-repo platform & embeddable assistant widget

Leyton CognitX

Jan 2025 - May 2025 (4 months)

Designed and implemented an embeddable chat/widget layer using Stencil/Web Components, built an admin console in Angular 19, and developed a Spring Boot backend with RAG capabilities for project-scoped knowledge.

Java 17 Spring Boot Spring Security Spring AI PostgreSQL Angular 19 TypeScript Stencil Web Components Keycloak i18n Liquibase LiteLLM Minio RAG

Java/Angular Full Stack Developer

Leyton

Mar 2023 - Dec 2024 (1 year 9 months)

Developed a Spring Boot starter for Keycloak security integration, reducing integration time from weeks to minutes. Implemented backend services, external communications via web-service, gRPC, and message queuing, and collaborated on an OCR application.

Java 11 Maven Gitlab PostgreSQL Spring Boot Angular Unit Testing Integration Testing Swagger JaCoCo SonarQube Clean Code Test Driven Development Code Quality OpenAPI Liquibase Keycloak Minio RabbitMQ

Software Engineer

XayOne

Jul 2022 - Dec 2022 (5 months)

Developed and maintained microservices for an Electronic Identification Management Solution (CIAM), built CI/CD pipelines with Jenkins and Docker, and implemented multi-factor authentication using OAuth2, OIDC, SAML, and SSO.