Senior Site Reliability Engineer @ ex-Trade Republic, ex-Booking.com, ex-Klarna

12/2017 – 10/2019

As a part of a core Infrastructure team at Babbel, I'm responsible for the stability and reliability of its cloud infrastructure.
My everyday field is AWS, however, I did some big scope of work in the GCP too.
Contributed to open source; Infrastructure as Code (Terraform, Chef).
ELK.

Core development languages:
- Ruby (for apps and scripts);
- Go (for AWS Lambda functions and Terraform add-ons);
- JavaScript (for AWS Lambda functions).

Moreover, I've done a few dozens of workshops on Infrastructure and Serverless related topics and actively participate in the hiring committee.

Continuous Delivery, DevOps (allg.), Software Architecture, Backend, Docker, Go (Programmiersprache), Node.Js, Ruby, Google Cloud, Amazon Web Services (AWS), Ruby on Rails

9/2017 – 8/2018

Responsibilities: Working in a cross-functioning team side by side with different stakeholders in order to deliver the best experience to the end-users.

Key achievements:
- Successfully delivered expected scope on major release dates even under tough circumstances;
- Gave a set of workshops about AWS and Terraform for colleagues;
- Gave few tech talks on Babbel hosted meetups and externally;
- Was responsible for all hiring and stakeholder communication during the long

Engineering Manager absence;
- When was needed, took care of different technologies from other teams, such as Python Flask, Node.js Lambdas, Golang, Kibana based analytics, and others, wherever my impact was needed.

Software Architecture, Software Design, Go (Programmiersprache), Node.Js, Python, Ruby, Amazon Web Services (AWS)

8/2016 – 9/2017

Key achievements so far:
1. Made a big impact by finishing the communication subsystem refactoring project.
2. Implemented flexible communication prioritization system.
3. Successfully finished almost dead search specific project.
4. In short, time developed data-driven MVP of statistics project.
5. Was in the first team, who adopted Docker and moved to Kubernetes.


Technologies: Ruby, RabbitMQ, PostgreSQL, MongoDB, Docker, Kubernetes.

Mongodb, Postgresql, Docker, Ruby, Amazon Web Services (AWS), Kubernetes

5/2016 – 7/2016

Writing business features,
Optimizing code quality,
Web performance optimization (BackboneJS),
Leading a small team of 2 developers
for 2 eCommerce-projects based on Ruby on Rails and Backbone.js.

Projektleitung / Teamleitung (IT), Ruby, Backbone.Js, Full-Stack, Ruby on Rails

10/2012 – 5/2016

I founded this company in 2012, and we were primarily doing software development outsourcing and consultancy.
Our core technologies were Ruby and Javascript.
In 2015 focused on federal Digital market and became a web-production company.

Key achievements:
- Work with major Russian agencies and integrators (Pichesky, Artus, Diasoft),
- Places in Tagline global ratings.
- 30 employees at the peak.
- Successfully completed a few projects for the government.

My areas of responsibility:
- Business development, networking.
- Hiring and interviewing technical specialists.
- Mentoring direct reports.
- Managing projects (using Kanban and Scrum methodologies).
- Architecture design.
- Engaged in development.

Totally we made more than 40 projects in different areas: e-commerce, e-gov, e-learning, saas.

Ruby, Swift (Programmiersprache), AngularJS, React (JavaScript library), Business Development

6/2011 – 10/2012

I had to work with different type of projects in different teams. Main technologies was Ruby on Rails and Backbone.js. Had one project with Meteor.js on support.

Among a lot of tiny (40-80hrs) projects and support projects there was few big & interesting:
- CruiseChannel.de. My role: fullstack developer. Techs: Ruby on Rails, Mysql.
- Detstvoshop.ru. My role: fullstack developer, team leader. Techs: Ruby on Rails, Spree, Mysql.
- Battlekeys.com. My role: fullstack developer, team leader. Techs: Ruby on Rails, PostgreSQL.
- RealtyIsp. My role: contributor. Techs: Cloud9, Meteor.js, Angular.js, MongoDB.

Mongodb, Node.Js, Ruby, Amazon Web Services (AWS), AngularJS, Ruby on Rails

6/2010 – 9/2011

As system administrator: Automizing processes with Bash and Ruby scripts, maintaining servers and local network.

As developer:
Worked on two big USA-based projects:
- Pack of Facebook games with big backend part.
- CRM system.

CRM Beratung (allg.), Bash Shell, Ruby, Ruby on Rails