System Reliability Engineer

Shedul

Warszawa

Type of work

Undetermined

Experience

Mid

Employment Type

B2B

Operating mode

Office

Tech stack

Docker

master

Heroku

master

PostgreSQL

master

Ansible

regular

AWS

regular

Elixir

regular

Jenkins

regular

New Relic

regular

Ruby

regular

Terraform

regular

Job description

Do you want to work for Shedul.com, a fast-growing platform that is revolutionizing the beauty and wellness industry? We are an incredibly ambitious, innovative and fast-growing global software startup with offices in Warsaw, London, and Dubai. Our high-traffic booking platform has quickly become a game-changing industry leader, with user base in over 200 countries. Our users transact millions of appointment bookings monthly, with thousands of active users at any time.

Today we’re seeking for a System Reliability Engineer (SRE) - a person who'll (shamelessly quoting Wikipedia ...) "apply her/his Software Engineering expertise to solve IT Operations problems". This role is not about (at least primarily) building new business features, but about taking care of non-functional aspects of the platform's architecture (& infrastructure code behind it) - e.g. performance, high availability, resilience, maintainability, security, etc.

In other words, such a person's daily activities will cover (a selection, not a complete list):

setting up & improving observability mechanisms for various platform elements (both technical & business aspects) - monitoring, alerting, error reporting, notifications, etc.
detecting (e.g. via chaos engineering) & driving the removal (with your own or other teams' hands) of architectural bottlenecks, malicious attack vectors, root causes of technical problems
measuring & optimizing non-functional architecture qualities (expressed as SLIs/SLOs)
design, execute, validate & evolve mechanisms (tools & procedures) needed by such crucial processes like: disaster recovery, capacity & performance testing, out-scaling various components of the platform, end-to-end deployment pipeline, etc.
automation of all of the above & much more :)

All of that to make sure that our exponentially growing traffic won't affect our never-ending quest to bring unparalleled value to both beauty salons & their demanding customers.

Your profile (required):

Practical experience in writing complex, web-scale on-line applications (preferably with Ruby on Rails)
Engineering attitude: based on pragmatism, measurable facts & common-sense (e.g. understanding of "good enough")
Engineering maturity: not being stuck to own opinions, taking ownership over decisions, cold-blooded risk assessment
Experience in optimizing online services (at least their back-end components)
Being able to plan, design & execute complex, multi-step change action plans (e.g. platform component upgrades, migrations, complex deployments) while eliminating (or at least minimizing) platform down-times
Genuine interest in non-functional, infrastructure parts of the platform & their architectural qualities (performance, maintainability, resilience, high availability, etc.)
DevOps attitude - collaboration, silo removal, shared responsibility, improving quality, fast feedback, automation
Experience with CI tools (preferably Jenkins)

Nice to have:

Practical (hands-on) experience with writing Ruby+Rails or Elixir+Phoenix applications
Practical (hands-on) experience with PostgreSQL, RabbitMQ and/or Redis
Experience with distributed architectures & various enterprise integration patterns (e.g. message brokers, RPC)
Strong communication skills, ability to self-organize and work well within a team (& with other teams)
Experience with monitoring & alerting of infrastructure, containers, web apps and services
PostgreSQL scalability, data replication, and backup skills and experience
Experience with Kubernetes for container orchestration
Experience with Heroku hosting

Our technology stack:

Recent versions of Ruby + Ruby on Rails and Elixir + Phoenix tandems at the core of back-end
PostgreSQL used through ORMs (ActiveRecord & Ecto) and raw SQL queries (for ETL purposes)
RabbitMQ as message queue and custom Protocol Buffer RPC layer on top of it
Docker running through custom scripting for development and end-to-end testing purposes
Solid patterns for organizing large codebase across front-end, back-end and test suites
Monolithic repository to organize multiple micro-services
Modern operations tool-chain built upon Kubernetes, Jenkins, Terraform and Ansible
Modern JavaScript (ES2015+) running React SPA frontend backed by Redux store
JSON API used as a contract between backend APIs and the client code
Use of external APIs including Twilio, Mandrill, AWS, Heroku
Automated end-to-end test suite based on Java and Selenium
Custom system for creating isolated test environments per feature

Our workflow highlights:

Agile development flow based on GitHub, JIRA, Slack and the CI
Mature product pipeline with predefined specs, designs, and architectures for all features
Proper Scrum process with multiple teams, overseen by Scrum master
Battle-proven approach to testing, static code analysis and code reviews
Code linters to guard a top-class Elixir (Credo, ExFormat), Ruby (Rubocop) and JavaScript code (ESLint)
Complete toolset including New Relic, Librato and AppSignal to inspect & fix performance issues
Frequent prototyping of new technologies to lead in the project's business

What we offer:

Competitive salary, 10,000 - 18,000 PLN net B2B negotiable based on your experience
Working with a talented team of about 40 passionate engineers, architects, and designers
Flexible working hours in the perfectly located modern office
Passionate, young and creative team in a fun, startup-biased working environment
Regular in-house events for sharing knowledge and passion: lightning talks, retros, demos
Occasional integration events like board games, bowling nights, ping-pong tournaments etc
Fruits, veggies, cakes, coffee, tea on a house to keep you rolling like a pro