Reza Jelveh, Big Data Architect Developer in Berlin, Germany
Reza Jelveh

Big Data Architect Developer in Berlin, Germany

Member since October 8, 2017
Reza has been the CTO at various startups and at a German government institution with a 1 billion revenue that needed restructuring. Ever since he took apart his first VCR over 30 years ago, Reza's been passionate about building meaningful hardware and software that people use and love. His obsession has grown to include a love for solving complex problems across a full spectrum of technologies.
Reza is now available for hire



  • Performance 15 years
  • Performance Analysis 15 years
  • Software Architecture 12 years
  • Architecture 12 years
  • Ruby 9 years
  • Agile Software Testing 7 years
  • Ansible 3 years
  • AWS CloudFormation 2 years


Berlin, Germany



Preferred Environment

Vim Text Editor, Linux

The most amazing...

...thing I've done was to reverse-engineer Apple's bootloader that allowed the company to migrate from VMware to KVM decreasing maintenance and saving millions.


  • Solutions Architect

    2020 - PRESENT
    Industrial Automotive Machine Learning (via Toptal)
    • Designed a Kubernetes enterprise storage solution for hybrid cloud solutions.
    • Designed an AWS machine learning architecture platform.
    • Integrated HSM for a secure developer's access to infrastructure.
    Technologies: Amazon Web Services (AWS), Kubernetes, AWS
  • DevOps Engineer | Software and System Architect | Python and Data Processing Architect

    2018 - PRESENT
    Rio Tinto (via Toptal)
    • Architected a scalable containerized solution for a seismic analytics platform for real-time sensor analysis.
    • Designed and implemented a scalable on-premise Kubernetes-based cluster with deployment in a copper mine. It mirrored the deployment on the cloud for developers without the need for access to the internal corporate processes.
    • Introduced a Django-based REST API for the unified access of processed data.
    • Performed a major performance and architectural review and rewrites of all components involved.
    • Developed a Kafka-streaming solution for ingesting legacy data in Kotlin.
    • Reverse-engineered a legacy database and storage systems for integration in a Kafka streaming re-architecture significantly reducing the latency in the data access.
    • Implemented near real-time processing of seismic events.
    • Built a real-time web integration in Django.
    • Led a development team and resources.
    • Developed a Go connector to extract legacy data for stream processing in Kafka.
    • Profiled and rewrote big parts of the application, turned them into a python library, added python packaging and testing infrastructure with corresponding build pipelines.
    • Hired and directed the development of a back-end web and front-end application.
    • Rearchitected the application to reduce the amount of data passed around in messages and removed and replaced Kafka dependency for normal messaging to Kafka streams processing where it was necessary.
    • Rewrote and architected various pieces of Python code into a releasable versionable library.
    • Matched requirements with potential streaming solutions Flink, Pachyderm, Argo, Airflow, NiFi, Spark and Flink to provide the best solution to the client.
    Technologies: Cloud, Azure Kubernetes Service (AKS), DevOps, Ceph, Redis, Kotlin, Go, GlusterFS, MongoDB, Kubernetes, Apache Kafka, Django, Azure, Terraform
  • Freelance Developer

    2018 - PRESENT
    • Dockerized the platform for use with Kubernetes.
    • Implemented a GitLab CI integration with the Google Cloud platform.
    • Designed a Google Cloud architecture with Google Cloud, GKE, and Terraform.
    • Terraformed the OnPremise vSphere infrastructure and added an ELK Elasticsearch cluster for monitoring.
    • Migrated the existing manually installed Kubernetes cluster to an automated Kubespray setup and connected it to the GitLab CI.
    Technologies: Cloud, DevOps, Google Kubernetes Engine (GKE), Google Compute Engine (GCE)
  • DevOps Consultant

    2021 - 2021
    Toptal Client
    • Introduced Autoscaling for Kafka using CruiseControl.
    • Coached the client on how to autoscale Kafka consumer groups in Kafka.
    • Coached client on Kubernetes persistent volume setups/Kafka Clusters across Availability Zones.
    Technologies: Apache Kafka, CruiseControl, Prometheus, Azure Kubernetes Service (AKS), Kubernetes
  • Solution Architect

    2020 - 2020
    Industrial 3D Printing Quality Control Startup (via Toptal)
    • Designed a multi-tenant secure cloud Kubernetes infrastructure for a platform that supports multiple enterprise clients secure compartmentalized ML workflows.
    • Worked with the client to educate and design an easy to use job queuing as a step before the ML pipeline for high-velocity integration.
    • Educated the client on designing the aforementioned autoscaling solutions with Terraform on AWS.
    Technologies: Amazon Web Services (AWS), RQ, Terraform, TensorFlow, AWS, Python
  • CTO

    2020 - 2020
    Toptal Law Firm Client
    • Restructured the team, led to halving the team size and improved velocity tenfold.
    • Recruited a new team and trained the CEO in the importance of engineering quality and created an environment for him to take over the lead with minimal effort.
    • Led technology and product decisions temporarily along with development and communication ground rules to allow the CEO to efficiently run his new performance team.
    Technologies: Vue.js, Heroku, Ruby on Rails (RoR)
  • CTO

    2016 - 2019
    Association of Statutory Health Insurance Physicians
    • Introduced Angular and Ruby on Rails for the new web projects.
    • Guided the installation of 100G MTP wiring as well as the necessary core drillings for a future-proof construction.
    • Introduced Agile project management to the organization.
    • Mentored young developers and product owners to grow further on their own.
    • Wrote the blueprint for transitioning the current on-premise domain controller (DC) to a private cloud.
    • Guided the transition of network access control, physical access control, and system architecture.
    Technologies: DevOps, .NET, Oracle, Java, VMware, Ruby on Rails (RoR), Ruby
  • DevOps Engineer

    2018 - 2018
    In One Motion
    • Created a one-click solution for generating and updating secure Windows images customized for the Google Cloud to be used with graphic acceleration.
    Technologies: Cloud, DevOps, Ansible, Packer, Terraform, Remote Desktop Protocol (RDP), Windows Server, Ruby on Rails (RoR), Ruby
  • Cloud Computing Director

    2014 - 2015
    Softsage Solutions
    • Reverse-engineered Apple's bootloader and extended the EDK for an OSX boot.
    • Automated software development onboarding environments with Ansible.
    • Improved Sauce Labs' cloud performance for up to 38% and boot times over 17%. Analyzed virtualized I/O, Networking and other bottlenecks against a bare-metal performance.
    • Designed and built preboot environments to migrate hundreds of Mac minis from VMware to KVM.
    • Implemented custom cloud deployment and performance work.
    • Developed packer imaging for Mac and Windows images.
    Technologies: Cloud, DevOps, BladeCenter H, VMware, Ansible, Python, Ubuntu, Boot, PXE, UEFI, KVM
  • Team Lead Web

    2014 - 2014
    Fly Victor
    • Led a team of web developers to build the new web platform and landing pages with Angular and the Node.js API.
    • Increased the conversion rates for new visits by 29%.
    Technologies: MongoDB, Angular, WordPress, Percona, Node.js
  • Software Engineer

    2012 - 2013
    Center for Business and Information Technologies
    • Reviewed and distributed an XMPP application for the Department of Homeland Security.
    • Designed and built the first RESTful Medicaid API.
    • Wrote special tooling to allow normal developers to modify data structures in the Dynamics CRM.
    • Evaluated the use of AWS GovCloud for Medicaid solutions.
    Technologies: Customer Relationship Management (CRM), XMPP, Erlang, Ruby on Rails (RoR), Ruby, .NET
  • Principle Software Architect

    2009 - 2012
    • Wrote significant portions of the web application.
    • Integrated various payment gateway systems before the age of Stripe.
    • Introduced Chef for infrastructure automation.
    Technologies: DevOps, SOAP, VMware, Ruby on Rails (RoR), Ruby, Chef
  • Software Architect

    2008 - 2009
    TalentRun GmbH
    • Heavily improved the database-heavy app with help from the Percona engineers.
    • Optimized the application by introducing full-text search and moving all the necessary queries out of the relational database.
    Technologies: Sphinx Search Engine, Memcached, MySQL, Zend Framework, PHP
  • Junior Engineer

    2007 - 2008
    Acculogic, Inc.
    • Built a new circuit testing algorithm to improve the performance of the checks against golden boards.
    • Built custom solutions for Intel to use with their circuit testing machinery.
    • Implemented a new circuit testing system using magnetic fields.
    Technologies: C++, Integrated Circuit Testing, Information & Communications Technology (ICT)


  • Eblotter (Development)

    Role: CTO | Co-founder
    • Designed and developed a price discovery platform for ETL brokers for one of the biggest securities brokerage firms.
    • Built Eblotter with React and Redux on a Ruby on Rails API with PostgreSQL as the datastore.

  • Universal-Ctags (Development)

    • Forked exuberant Ctags and moved it to a new organization with the amazing work of Masatake YAMATO.

  • Linux | EDKII | EFI | KVM | Qemu (Development)

    • Fixed initialization of SATA devices
    • Added several protocols and fixes to the open-source UEFI bootloader and Qemu to unmodified macOS to boot in Qemu
    • Added an implementation of a HFS+ filesystem driver to EDKII
    • Created custom Linux boot images to migrate VMWare ESXi to Linux

  • MPlayer | FFmpeg (Development)

    • Executed the AltiVec CPU optimizations in the FFmpeg Swscaler.
    • Implemented savage graphics for the VIDIX driver.
    • Implemented an NSV demuxer.
    • Added seeking in Real files without an index.
    • Created the first Musepack decoding patch.

  • Spca5xx Generic Linux Camera Driver (Other amazing things)

    • Ported Spca5xx to kernel 2.6.

  • Embedded Linux and Android Work (Other amazing things)

    • Created Yocto-embedded Linux images for an iMX6 platform.
    • Built custom Android images for home video and Mako-based CyanogenMod devices.

  • Go FreeNAS API Client (Development)

    • Wrote a Go FreeNAS API client that was necessary for use with the Terraform-provider that I created.

  • FreeNAS Terraform Provider (Development)

    • Created a Terraform FreeNAS provider to manage the NAS from Terraform. It makes it much nicer and easier to use in production environments.

  • Satellite Communication Simulator (Development)

    I added Layer 2 to a niche network simulator to simulate layer-2 behaviour for Inmarsat satellites. This allowed simulating communication for FDR p2p transfers in an Inmarsat zones, to estimate the optimal data transfer between planes.


  • Languages

    Python, Ruby, Bash, C++, C, SQL, Solidity, Java, Erlang, PHP, Go, Kotlin, GraphQL
  • Frameworks

    Angular, AWS HA, Ruby on Rails (RoR), .NET, Zend Framework, Django
  • Libraries/APIs

    Ruby on Rails API, Node.js, TensorFlow, React, Vue.js, RQ
  • Tools

    Packer, GitLab, GitHub, Git, RSpec, Vim Text Editor, Terraform, AWS CloudFormation, Ansible, Helm, Azure Kubernetes Service (AKS), GitLab CI/CD, Jenkins, Logstash, Kibana, Elastic, RabbitMQ, Shell, Puppet, Chef, Zsh, Kafka Streams, VMware, Google Compute Engine (GCE), Google Kubernetes Engine (GKE)
  • Paradigms

    DevOps, Agile Software Development, REST, DevSecOps, API Architecture
  • Platforms

    Amazon Web Services (AWS), KVM, Ubuntu, Docker, Kubernetes, Windows, Linux, Apache Kafka, Azure, Solaris, Android, Oracle, Percona, WordPress, Windows Server, Heroku, Ethereum, Blockchain
  • Storage

    Ceph, Redis, NoSQL, MySQL, Memcached, Elasticsearch, Database Performance, PostgreSQL, MongoDB, Sphinx Search Engine, GlusterFS
  • Other

    Cloud, Virtualization, WiFi, SANs, Software Defined Storage, Performance, Performance Analysis, Back-end Performance, UEFI, Agile Software Testing, Project Management Professional (PMP), CISSP, Linux Internals, Software Engineering, Architecture, Software Architecture, Big Data, Big Data Architecture, Time Series, Stream Processing, Streaming Data, LTE, Unified Threat Management (UTM), Intrusion Detection Systems (IDS), Intrusion Prevention Systems (IPS), Security Audits, PXE, SOAP, Windows Internals, XMPP, Customer Relationship Management (CRM), Boot, BladeCenter H, Remote Desktop Protocol (RDP), AWS, Information & Communications Technology (ICT), Integrated Circuit Testing, CruiseControl, Prometheus


  • Master's degree (Diplom Ingenieur) in Computer Engineering
    2002 - 2007
    Hamburg University of Technology - Hamburg, Germany


  • Certified Information Systems Security Professional (CISSP)
    DECEMBER 2017 - DECEMBER 2020
  • Project Management Professional (PMP)®
    AUGUST 2017 - AUGUST 2020
    PMI | Project Management Institute

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