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Fares Elsadek

Fares Elsadek

Backend Software Engineer

Cairo, Egypt

Backend Software Engineer focused on building scalable APIs, distributed systems, and cloud-native applications. Experienced in designing observable, reliable backend services with a strong foundation in security and DevOps.

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Engineering Focus

I build scalable backend systems, focusing on clean API design, distributed communication, and cloud-native architecture. My work spans real-time systems, event-driven architectures, and robust cloud deployments.

I care about the details that keep systems running well: observability with OpenTelemetry and Grafana, cache invalidation strategies, cursor-based pagination, and authentication flows with OAuth2 and JWT. I also bring a security-first perspective from hands-on vulnerability research.

Experience

Software Engineer — Health Insights Group

December 2025 – Present

Cairo, Egypt

  • Worked on backend modules for a healthcare platform, contributing to feature development and maintenance.
  • Helped redesign the real-time notification legacy system to support higher connection counts using SignalR and a Redis backplane.
  • Participated in architecture discussions, code reviews, and technical planning.
  • Collaborated with clinical and product teams to translate requirements into production-ready features.
  • Supported production systems by resolving bugs, improving performance, and contributing to roadmap planning.

Software Engineer Intern — EJADA Systems

July 2024 – September 2024

Cairo, Egypt

  • Developed application backend features and maintained CRM integrations.
  • Designed SQL Server queries for CRM and reporting workflows.
  • Automated business processes using JavaScript.
  • Built internal dashboards for data insights.
  • Implemented role-based security controls.

Web Security Researcher — HackerOne

January 2023 – April 2024

Remote

  • Identified and responsibly disclosed vulnerabilities for programs including U.S. DoD and AT&T.
  • Received Hall of Fame recognition across multiple programs.
  • Applied security knowledge to API design, authentication, and architecture decisions.

Cyber Security Intern — ITI

August 2022 – September 2022

Cairo, Egypt

  • Completed 120-hour cyber security training.
  • Studied computer networking fundamentals, Windows Server Administration, RedHat System Administration, and firewall technologies.

Featured Projects

DevTalk

GitHub →

A developer social platform with posts, comments, voting, bookmarks, and categorized feeds.

.NET 9SignalRRedisElasticsearchKibanaOpenTelemetryPrometheusGrafanaAzureGitHub Actions
  • Built using Clean Architecture and CQRS via the Mediator library.
  • Implemented real-time notifications using SignalR with an in-memory message queue for asynchronous processing.
  • Implemented end-to-end observability using OpenTelemetry, collecting distributed traces and metrics, exposing them to Prometheus, and visualizing request throughput, latency, and error rates through Grafana dashboards.
  • Used Redis caching with event-driven cache invalidation to keep data fresh and responsive.

Limitry

GitHub →

A Redis-backed distributed rate limiter in Go supporting Token Bucket and Sliding Window Counter algorithms.

GoRedisLuaOpenTelemetryPrometheusGrafanak6KubernetesKustomizeDocker
  • Implemented Token Bucket and Sliding Window Counter algorithms via atomic Lua scripts.
  • Designed dual-mode architecture: transparent reverse proxy and standalone check API, allowing drop-in integration with any stack.
  • Implemented per-route configuration with fail-open/closed resilience policy for Redis outages.
  • Instrumented full observability pipeline using OpenTelemetry for distributed tracing, Prometheus for metrics, and Grafana for dashboards.

SyncSpace

GitHub →

A Discord-style collaboration platform with messaging, notifications, video rooms, and real-time presence.

Spring BootAngularWebSocket/STOMPPostgreSQLRedisKeycloakDockerAWS EC2
  • Designed as a 6-module modular monolith with clean architecture.
  • Implemented OAuth2/OIDC authentication with Keycloak and JWT.
  • Applied CQRS read/write separation and Redis caching.
  • Used PostgreSQL schema-per-module design with Flyway migrations and indexing.

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Other Projects

Platform-Command — Two communicating microservices with synchronous and asynchronous messaging.
.NET CoreRabbitMQRESTgRPC
ClickMart — A complete e-commerce application with product management, cart, and payments.
ASP.NET MVCSQL ServerStripeBootstrap
QuesGenie — Fine-tuned T5 models for automatic question generation.
PyTorchHugging Face TransformersT5

Technical Skills

Languages

C#JavaGoPythonJavaScriptTypeScriptC++

Backend & Frameworks

.NET CoreSpring BootSignalRAngular

Databases & Search

SQL ServerPostgreSQLRedisElasticsearch

Architecture

Clean ArchitectureCQRSMicroservicesModular MonolithRepository PatternEvent-Driven Design

DevOps & Cloud

DockerKubernetesAWSAzureNginxGitHub ActionsCI/CD

Security

OAuth2JWTKeycloakSecure Coding Practices

Technical Writing

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Education & Certifications

Bachelor of Computer Science

Ain Shams University, Cairo, Egypt

September 2021 – May 2025

Certifications

  • AWS Certified Cloud Practitioner — Amazon Web Services
  • Certified AppSec Practitioner (CAP) — SecOps Group
  • Object Oriented Programming in Java — UC San Diego (Coursera)
  • Cyber Security Training — 120 hours — ITI

Volunteering

Contact