I have been consulting for 7+ years, and have been involved in a wide range of technical topics, both in development and operations. If you're looking for lead-dev / CTO-like level of skills, I can deliver.
Over the years I developed a strong ability to get up and running on new/existing projects very quickly. Also, having products (and paying clients) myself means I understand what drives a business and can often find solutions that were not envisioned by other tech people.
My main interests right now
Streamlining deployment pipelines. Compared to the usual deployment tooling, orchestration tools such as Kubernetes or Convox give you at least a 10x velocity for deploying apps, for at least half of the cost.
Hosting high traffic websites, and finding every way to reduce hosting bills with agressive caching (both HTTP and application-level), performance improvement in the hosted apps (less time spent processing requests = less servers needed), profiling and refactoring hot paths, and last but not least, better usage of cloud providers.
Development of Rails apps. Also interested in Next.js and React.
Some examples of things I've done in the past
Revamping AWS infrastructure for a company offering a SaaS, reducing AWS bill from $15k to $2.5k. And at the same time, getting them a nice platform and continuous integration system to build, test, deploy, and monitor their services.
Migrating large (and critical) RubyOnRails projects from Rails2.x/Ruby1.8 to Rails4.x/Ruby2.x (and then Rails 5.x and 6.x), adding a strong test suite and CI pipeline to ensure the main features were working with the new stack as we went over the numerous changes required to upgrade.
Setup of CI/CD systems.
Setup of infrastructure provisioning with Puppet.
Migrating applications to docker, and everything that goes with it.
Writing tests, both as blackbox tests against legacy systems to prepare for a migration, and unit/integration/system tests.
Advising and implementing Single Sign On solutions.
ElasticSearch interactions (indexing, aggregations, reporting).
I'm preferably working remotely, but for larger projects I will generally travel to meet your team at the beginning of the contract. I can also work on site if you're based in the region of Rennes, France.