Houssem Eddine Zerrad

Houssem Eddine Zerrad

Staff Software Engineer | Cloud Architect

MSc. Computer Science Spc. Artificial Intelligence

Work Experience

Ordaos Bio - New York, United States - Remote

Staff Software Engineer

October 2024 - Present

  • Own backend and data-platform surface area across multiple Python services (FastAPI APIs, ETL/ML pipelines, job monitor, CLI tooling), reporting directly to the CTO on platform direction.
  • Redesigned ingestion and retrieval paths in the core data pipeline, improving end-to-end performance by ~70%.
  • Authored and drove team adoption of a Redis caching strategy (endpoint selection, TTLs, invalidation) across production APIs.
  • Defined shared platform conventions for service boundaries and API contracts, reducing integration friction across the wider system.
  • Partnered with DevOps and ML teams on roadmap-level architecture decisions for computational and lab workflows.

Master Technology Computers - Algeria - On-Site

Lead Software Engineer

July 2023 - October 2024

  • Defined and rolled out engineering operating standards to improve delivery throughput and reduce rework.
  • Tech-led a multi-developer delivery from planning through production rollout, coordinating scope, sequencing, and quality gates to ship on schedule.
  • Designed a cloud-native, serverless-first architecture to scale predictably while controlling operational cost.
  • Introduced coding standards and review checklists, reducing code review cycle time by ~15% while improving consistency and maintainability.

Senior Software Engineer - Full-Time

October 2020 - July 2023

  • Designed and developed a highly-available, fault-tolerant web application using modern cloud technologies
  • Developed a secure authentication system with two-factor authentication and user identity management
  • Architected and led the migration from a monolithic Elixir backend to a microservices architecture, boosting load capacity by 200%.
  • Built a distributed system that increased throughput by 120%
  • Implemented an event-based microservices architecture that improved system modularity and reduced dependencies between components
  • Implemented a Continuous Integration/Continuous Deployment (CI/CD) pipeline that reduced time-to-deployment from 1 day to ~40 minutes

Fortune.app - Montreal, Canada - Remote

Founding Engineer - Contract

October 2023 - April 2024

  • Led the backend migration from JavaScript to TypeScript, materially reducing production error volume and improving long-term maintainability.
  • Designed and implemented multi-tier subscription logic and real-time currency exchange, contributing to improved retention.
  • Developed REST APIs and implemented OAuth-based authentication for secure third-party access.
  • Established review and tooling practices that raised code quality and reduced repeat issues.

IntegrationOS - Ontario, Canada - Remote

Senior Software Engineer - Contract

July 2022 - July 2023

  • Built event-driven streams, queues, and workflows on Kafka capable of handling billions of events in production.
  • Established the contract pattern for source and target integrations, significantly accelerating the rate at which new integrations could be added.
  • Developed 10+ source integrations and 6+ target integrations, including GitHub and Shopify.
  • Top contributor to the IntegrationOS open-source Core repository during tenure.

FelixSmart Inc. - Calgary, Canada - Remote

Software Engineer - Contract

March 2020 - October 2020

  • Played a critical role in debugging and reconstructing the smart aquarium firmware,restoring system functionality and reducing customer churn.
  • Performed deep optimization of the smart aquarium firmware, reducing errors by 90%
  • Established real-time connectivity between the aquarium system and the Firebase backend, reducing costs by 22% and enhancing system feedback.

Selected Projects

CloudCare

Co-founder & Engineering Lead

A healthcare EHR platform targeting private clinics in Algeria. CloudCare is designed end-to-end around the constraint that medical data must remain in country, which shapes the entire architecture.

  • Application-layer encryption built on HashiCorp Vault and AWS KMS so data is protected before it reaches storage.
  • Identity and access stack built on Keycloak, Open Policy Agent, and a custom Go auth-broker for policy-aware authorization.
  • PostgreSQL for relational data, MinIO for object storage, golang-migrate for CI/CD-friendly migrations.
  • Modeled around the Algerian medications catalog and clinical workflows.

EnsVAE

Ensemble Variational Autoencoders for Recommendations — IEEE, 2020

Master's research combining a variational autoencoder ensemble with GloVe-based content filtering and a GRU matrix-factorization component, applied to recommender systems.

Testimonials

A fantastic job done by Houssem, as always!

Daniel Spataro

Daniel Spataro

CEO at IntegrationOS

Houssem is a great developer and a great person to work with. He showed himself like a real professional. He helped us to understand those nuances [in our system] and find a way to handle them.

Tom Goedhart

Tom Goedhart

Co-Founder at Barbaard Management

He is a professional engineer with a great deal of experience and a will to jump into fixing any problem.

Lucas Gozalvez

Lucas Gozalvez

CTO at FelixSmart Inc.

His technical skills and attention to detail were impressive. What stood out even more was his exceptional communication throughout the project.

Nina Rezec

Nina Rezec

Founder at Global Consultancy UAE

Houssem Eddine Zerrad

Staff Software Engineer & Cloud Architect · © 2026