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<!DOCTYPE html>
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<title>A14M</title>
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<meta name="author" content="Ahmed AbdelHalim" />
<meta name="description" content="A14M · Platform Engineer/DevOps" />
<meta name="keywords" content="DevOps, go, docker, ansible, python, bash, CI, CD, TDD, BDD, AWS, terraform, GCP, k8s, kubernetes, grafana, prometheus, loki, ELK" />
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<main>
<header class="header">
<h1 class="header__name">Ahmed AbdelHalim</h1>
<em class="header__job-title">Platform Engineer · DevOps</em>
<address class="header__contact-info">
<div class="header__location">Berlin, Germany</div>
<div class="header__tel"><a href="tel:+491770126386">+49 177 912 6386</a></div>
<div class="header__email"><a href="mailto:[email protected]">[email protected]</a></div>
<div class="header__website"><a href="https://a14m.me">website</a></div>
<div class="header__srht"><a href="https://git.sr.ht/~a14m">sr.ht</a></div>
<div class="header__github"><a href="https://github.com/a14m">Github</a></div>
<div class="header__stackoverflow">
<a href="https://stackoverflow.com/users/1769515/a14m">StackOverflow</a>
</div>
<div class="header__linkedin"><a href="https://www.linkedin.com/in/a14m">LinkedIn</a></div>
</address>
</header>
<article class="summary">
<h2 class="summary__header section-header">Summary</h2>
<p class="summary__content">
Platform engineer with
10+ years of experience in software development (backend/API focused),
5+ years in infrastructure automation and DevOps,
hobbyist security analyst and tester.
An avid fan of automation, sustainability, design patterns, and clean code.
Always interested in deriving a better problem-solving method for challenging tasks,
and learning sensible new technologies and tools (when the need arises).
</p>
</article>
<article class="skills">
<h2 class="skills__header section-header">Skills</h2>
<dl class="skills__content">
<dt class="skills__title">DevOps</dt>
<dd class="skills__items">Kubernetes, Terraform, Docker, Ansible, CloudFoundry, Helm, Fastly, Vault,
Concourse, Artifactory, ...
</dd>
<dt class="skills__title">Telemetry</dt>
<dd class="skills__items">Grafana, Prometheus, Loki, <abbr title="Elasticsearch Logstash Kibana">ELK</abbr>,
Sentry, Tempo.
</dd>
<dt class="skills__title">Programming</dt>
<dd class="skills__items">Go, Ruby, Python, Bash, Rust.</dd>
<dt class="skills__title">Paradigms</dt>
<dd class="skills__items">
Design Patterns, Test Driven Development (<abbr>TDD</abbr>), Behavior Driven Development (<abbr>BDD</abbr>),
Continuous Integration and Delivery (<abbr>CI/CD</abbr>), Infrastructure as Code (<abbr>IaC</abbr>),
Configuration as Code, RESTful APIs, Micro-Services.
</dd>
<dt class="skills__title">Tools</dt>
<dd class="skills__items">
vim, git, tmux, ssh, bash, kubectl, kubevela, ansible, helmfile, vagrant, docker, certbot, dig, bosh, vault,
nc, nmap, curl, ffuf, gobuster, sqlmap, xxd, searchsploit, meta-sploit, commix, gdb, ltrace, ...
</dd>
<dt class="skills__title">Platforms</dt>
<dd class="skills__items">
Amazon Web Services (<abbr>AWS</abbr>), DigitalOcean, Heroku, Google Cloud Platform (<abbr>GCP</abbr>),
Linux.
</dd>
<dt class="skills__title">Languages</dt>
<dd class="skills__items">English (Professional), German (Basic), Arabic (Native).</dd>
</dl>
</article>
<article class="work">
<h2 class="work__header section-header">Work Experience</h2>
<article class="work__experience">
<div class="job-position">
<h2 class="job-position__company">
<a href="https://group.springernature.com/gp/group">Springer Nature AG & Co. KGaA</a>
</h2>
<em class="job-position__title">Platform Engineer</em>
<em class="job-position__duration">Feb. 2022 - Jul. 2022</em>
<em class="job-position__location">Berlin, Germany</em>
</div>
<p class="note">Part of the Engineering Enablement team, that enables product teams to focus on
delivering value to the business.<br/>
We Provide: <br/>
</p>
<ul class="tasks">
<li>Platform as a Service (<abbr>PaaS</abbr>) with centralized services like
logging, metrics, CI/CD and caching.
</li>
<li>CloudFoundry platform capable of handling an average of 13.000 requests/min.</li>
<li>CloudFoundry and Kubernetes clusters with around 2.800 apps (Micro-Services).</li>
<li>Concourse pipelines that handle an average of 4.000 deployments/week.</li>
<li>Internal tooling around building pipelines for CI/CD on Concourse and GitHub actions.</li>
<li>Prometheus as a Service, and pre-configured customizable Grafana dashboards for developers to use.</li>
<li>Logging via ELK/Loki and logging metrics.</li>
<li>Implementing solutions for cloud services, focusing on high availability, security,
disaster recovery, scaling and performance.
</li>
</ul>
</article>
<article class="work__experience">
<div class="job-position">
<h2 class="job-position__company"><a href="https://sapera.com/">Sapera GmbH.</a></h2>
<em class="job-position__title">Senior Developer/DevOps</em>
<em class="job-position__duration">Apr. 2018 - Nov. 2021</em>
<em class="job-position__location">Berlin, Germany</em>
</div>
<ul class="tasks">
<li>
Implemented infrastructure as code (<abbr>IaC</abbr>) for different projects using Terraform and Ansible.
</li>
<li>Standardized the deployment process (and maintained the process documentation).</li>
<li>Built templates to provision infrastructure on different cloud providers and development stages.</li>
<li>
Built standardized workflows using CircleCI to automate deployments (for internal and external projects).
</li>
<li>
Implemented and maintained the (Rails 5) JSON API serving our
<a href="https://app.visualpedia.igg.cloud"> infographics portal</a>.
</li>
<li>
Maintained 99+% documentation coverage of the
<a href="https://app.visualpedia.igg.cloud"> infographics portal</a> API and 90+% test coverage.
</li>
<li>Worked with Docker to provide deliverables for some of our external projects.</li>
<li>
Provided support and tutoring to work with our standard deployment workflows (internally and externally).
</li>
<li>Worked closely with our Systems Engineer to support with various DevOps tasks.</li>
<li>
Rewrote, maintained and provisioned some of the data pipelines to adhere to a better security standards.
</li>
</ul>
</article>
<article class="work__experience">
<div class="job-position">
<h2 class="job-position__company"><a href="https://liqid.de/">LIQID GmbH.</a></h2>
<em class="job-position__title">Senior Backend Developer</em>
<em class="job-position__duration">Mar. 2016 - Dec. 2017</em>
<em class="job-position__location">Berlin, Germany</em>
</div>
<ul class="tasks">
<li>Maintained the RESTful API (used by admins and front-end).</li>
<li>Implemented and maintained the integration with Deutsche Bank.</li>
<li>
Implemented and maintained the integration with Intercom
<abbr title="Customer Relationship Management">CRM.</abbr>
</li>
<li>Implemented and maintained the Invoicing system.</li>
<li>
Implemented the new authentication layer using
<a href="https://tools.ietf.org/html/rfc7519">(RFC7519: JWT)</a>.
</li>
<li>Implemented the Two-Factor Authentication (<abbr>2FA</abbr>) for user/client login.</li>
<li>Integrated other services like DocuSign, PostIdent,...</li>
<li>Implemented day to day business/marketing/technical requirements.</li>
</ul>
</article>
<article class="work__experience">
<div class="job-position">
<h2 class="job-position__company">PrioriData GmbH.</h2>
<em class="job-position__title">Full Stack Developer</em>
<em class="job-position__duration">Jul. 2015 - Feb. 2016</em>
<em class="job-position__location">Berlin, Germany</em>
</div>
<p class="note">Was acquired by <a href="https://airnow.com/">Airnow Data Ltd.</a></p>
<ul class="tasks">
<li>Maintained the Rails web (dashboard) app.</li>
<li>Optimized the scraping process of getting the data from Apple and GooglePlay stores.</li>
<li>Reimplemented the queueing and monitoring around the scrapers.</li>
<li>Migrated acquired data from different resources to Google BigQuery.</li>
<li>
Maintained and provisioned different purpose <abbr title="Virtual Machines">VM</abbr> instances on Google
Cloud Platform (using chef).
</li>
<li>
Reimplemented the “Extract” step in the
<abbr title="Extract, Transform, Load">ETL</abbr> process (using an API based crawler instead of phantomJS
browser).
</li>
</ul>
</article>
<article class="work__experience">
<div class="job-position">
<h2 class="job-position__company">AskNative</h2>
<em class="job-position__title">Backend Developer/DevOps</em>
<em class="job-position__duration">May. 2013 - Jul. 2015</em>
<em class="job-position__location">Remote, Egypt</em>
</div>
<ul class="tasks">
<li>
Reimplemented large portions of the API to follow better design patterns<br />
(Hexagonal Architecture, and <abbr title="Publish-Subscribe">Pub/Sub</abbr> pattern).
</li>
<li>Implemented the test suite for the API.</li>
<li>Implemented events booking feature via Stripe.</li>
<li>Reimplemented caching for better response times.</li>
<li>Maintained the Heroku stacks for staging/production.</li>
</ul>
</article>
</article>
<article class="projects">
<h2 class="projects_header section-header">Writing</h2>
<article class="project">
<h2 class="project__title">The Publish/Subscribe Pattern on Rails</h2>
<p class="project__content">
A
<a href="https://www.toptal.com/ruby-on-rails/the-publish-subscribe-pattern-on-rails">
Toptal published blog post
</a>
on implementing the <abbr title="Publish-Subscribe">Pub/Sub</abbr> pattern in practice in Rails apps.
</p>
</article>
<article class="project">
<h2 class="project__title">Clean Code and the Art of Exception Handling</h2>
<p class="project__content">
A
<a href="https://www.toptal.com/abap/clean-code-and-the-art-of-exception-handling">
Toptal published blog post
</a>
on different tactics and strategies for exception handling and how to employ them to write cleaner code.
</p>
</article>
<article class="project">
<h2 class="project__title">
<a href="https://git.sr.ht/~a14m/OTW"> Over The Wire Solutions </a>
</h2>
<p class="project__content">
Solutions for some of the <a href="https://overthewire.org/wargames/">OTW wargames</a>
documented in a README files format.
</p>
</article>
<article class="project">
<h2 class="project__title">
<a href="https://git.sr.ht/~a14m/HTB"> Hack The Box Solutions </a>
</h2>
<p class="project__content">
Learning security analysis via documenting the solutions for some of the
<a href="https://hackthebox.eu">HTB machines</a>
in a README files format.
</p>
</article>
</article>
<article class="projects">
<h2 class="projects__header section-header">Projects</h2>
<article class="project">
<h2 class="project__title">
<a href="https://git.sr.ht/~a14m/game-of-life"> Conway's Game of Life </a>
</h2>
<p class="project__content">
A mono-repo with different command line interface (<abbr>CLI</abbr>) implementations for the
<a href="https://en.wikipedia.org/wiki/Conway%27s_Game_of_Life">Game of Life</a> in multiple languages
(currently Ruby/Rust), with the automation for publishing updates to different package managers using a
git-ish workflow.
</p>
</article>
<article class="project">
<h2 class="project__title">
<a href="https://git.sr.ht/~a14m/a14m.srht.site"> a14m.srht.site </a>
</h2>
<p class="project__content">The source code, and deployment scripts for this website/CV.</p>
</article>
</article>
<article class="education">
<h2 class="education__header section-header">Education</h2>
<article class="education__details">
<h2 class="education__degree">B.E. in Computer Science and Engineering</h2>
<p class="education__university">Arab Academy for Science and Technology</p>
<p class="education__gpa">GPA 3.1/4.0 (B - Very Good)</p>
<em class="education__location">Alexandria, Egypt</em>
<em class="education__duration">Sep. 2005 - Jan. 2011</em>
</article>
</article>
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