Johannes Engl - Senior Software Engineer

Berlin, Germany

Experience

Aug 2021 - Apr 2022

9 months

London, United Kingdom

Senior Software Engineer

Deliveroo

Geo-sharded different Ruby services to improve scalability.
Planned and executed a project to increase peak-time order processing capacity by launching a second Amazon Aurora database cluster.
Offloaded high-volume tables with billions of rows to the new cluster.
Reduced absolute CPU usage during peak hours on average by 15.79%.
Utilized technologies and skills including Ruby on Rails, AWS, Kafka, microservice architectures, big data, Terraform, Datadog and Protocol Buffers.

Jan 2021 - Jul 2021

7 months

San Francisco, United States

Senior Software Engineer

Monograph

Consulted the engineering team on system architecture.
Advised on best practices around development workflows and processes.
Mentored team members.
Implemented product features in Ruby on Rails.
Worked with Ruby on Rails and GraphQL.

Jul 2019 - Jun 2020

1 year

Berlin, Germany

Team Lead Growth Engineering

Tourlane

Led the Growth Engineering team responsible for building customer-facing web applications for lead generation and ad-tech products.
Managed a team of seven engineers and one product manager.
Drove an initiative to extract SEO pages into a microservice in a serverless way using Gatsby.
Achieved a 3x performance improvement in time to interact with the website.
Used Ruby on Rails, AWS, Kafka, microservice architectures, ad tech, A/B testing, Docker, Snowflake and Terraform.

Sep 2018 - Jun 2019

10 months

Berlin, Germany

Senior Software Engineer

Tourlane

Built a tracking infrastructure using Apache Kafka.
Introduced a last-click attribution model and created marketing reports.
Enabled data-driven decisions in marketing across the company.
Calculated target cost per acquisition for paid marketing based on historical data to increase the efficiency of SEM ads.

Oct 2016 - May 2017

8 months

San Francisco, United States

Lead Developer

Airgora

Developed the core technology from the first prototype to product release.
Led product iterations until achieving product-market fit.
Worked with Ruby on Rails and React.js.

Nov 2014 - Dec 2016

2 years 2 months

Berlin, Germany

Co-Founder & CEO

99trips

Co-founded a travel tech startup offering a one-stop shopping experience for technology-based curated city trips.
Grew the platform to over 10,000 registered users and more than 10,000 € in sales.
Developed the product’s technology stack.
Managed a team of five people.
Used AngularJS, Ruby on Rails and AWS.

Dec 2012 - Present

13 years 2 months

Co-Founder & Board Member

NGO KAJO e.V.

Founded an association with more than 30 members focused on scholarships and education in Ethiopia.
Raised over 50,000 € in donations benefiting education in Ethiopia.
Organized and executed projects on site in Addis Ababa, Ethiopia.

Open Source Contributor

ViewComponent

Contributed to the open-source framework ViewComponent initially built by GitHub.
Worked on functionality for building reusable, testable and encapsulated view components in Ruby on Rails.

Skills

Ruby On Rails
Aws Cloud Computing
Golang
Terraform
Docker
React
Graphql
Sql
Datadog
Apache Kafka
Snowflake
Microservice Architectures
Event-driven Architectures
Bigdata
Ad-tech For Sem And Seo
Building And Managing Engineering Teams
Solving Scalability Problems
Ab-testing

Languages

German

Native

English

Advanced

Spanish

Advanced

Education

Sep 2011 - Aug 2014

University of Applied Sciences HTW Berlin

Bachelor of Science, Web Technologies · International Media and Computing · Berlin, Germany

Certifications & licenses

Certified ScrumMaster

Scrum Alliance

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99trips

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ViewComponent

Skills

Languages

Education

University of Applied Sciences HTW Berlin

Bachelor of Science, Web Technologies · International Media and Computing · Berlin, Germany

Certifications & licenses

Certified ScrumMaster

Scrum Alliance

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