Martin Wilhelmi
Security Auditor
Experience
Aug 2023 - Present
2 yearsSecurity Auditor
MissionMe
- Environment: AWS, Ruby on Rails, GraphQL, React Native
- Penetration test for Backend, Android app and iOS app
May 2023 - Sep 2023
5 monthsSenior Software Architect & DevOps Engineer
Financial Industry (protected by NDA)
- Environment: Ansible, GitHub, GitHub Actions, WireGuard, Terraform, AWS, Ruby on Rails, Next.js, Docker, MSSQL
- Provisioning specially configured instances with Ansible on AWS
- Building and developing new features
- Backup strategy on AWS for MSSQL
- Deploying staging and production environments on AWS with Terraform including S3, Elastic Beanstalk, EC2, SES, SNS and more services
Apr 2023 - Present
2 years 4 monthsSenior Software Architect
Medical Industry (protected by NDA)
- Environment: Ruby on Rails
- Creating accounting software for billing
- EDIFACT generation for statutory health insurance accounting
- Testing
Sep 2022 - Nov 2022
3 monthsSenior Software Architect
Graylog
- Environment: OpenSearch, Python, Debian, Ubuntu, GitHub
- Writing a design issue to document the approach to build a DEB package for OpenSearch
- Extending the OpenSearch Build project to build a DEB package
Apr 2022 - Nov 2022
8 monthsSenior Software Architect
Graylog
- Environment: React, TypeScript, Java, Docker, GitHub
- Further developing the React frontend
- Maintenance and refactoring of deprecated and legacy code
- Developing new features
Oct 2021 - Present
3 years 10 monthsSecurity Auditor
Medical Industry (protected by NDA)
- Environment: Ruby on Rails, React Native, REST APIs
- Penetration test for Backend, Android app and iOS app
May 2021 - Present
4 years 3 monthsDevOps Engineer
MissionMe
- Environment: AWS, Postfix, Dovecot, Sieve
- Restructuring sending and receiving emails
- Transfer of support emails
- Consulting on topics like AWS
Dec 2020 - Mar 2022
1 year 4 monthsSenior Software Architect
Financial Industry (protected by NDA)
- Environment: Vue.js, TypeScript, Ruby on Rails, GitLab, Cypress, Google Cloud
- Further developing the Rails backend and the Vue.js frontend
- Maintenance and refactoring of deprecated and legacy code
- Developing new features
May 2020 - Jul 2023
3 years 3 monthsSenior Developer & DevOps Engineer
Wedding Planner
- Environment: AWS, GitHub Actions, CircleCI, Ansible, Ruby on Rails, Redis
- Further development and relocation of the existing application
- Provisioning new instances with Ansible on AWS
- Developing new features
- Maintenance
Jun 2019 - Apr 2020
11 monthsSenior Developer & DevOps Engineer
MissionMe
- Environment: React, React Native, TypeScript, AWS, Rails 5, GitHub, CircleCI, Stripe
- Customizations for Strong Customer Authentication (SCA) with Stripe for one-time and recurring payments
- Further developing the React frontend and Rails backend of two applications
- Hosting a new application on AWS with Elastic Beanstalk
May 2019 - Jun 2019
2 monthsDevOps Engineer
sum.cumo
- Environment: Docker, Kubernetes, AWS, Rails 5, GitLab
- Setting up a Kubernetes cluster on AWS
- Connecting Kubernetes to GitLab’s Review Apps feature
- Creating Docker containers from existing Rails, Scala and Node projects and deploying them in Kubernetes
Apr 2018 - Mar 2019
1 yearSenior Developer
- Project: Startpage
- Environment: Cassandra, Riak, Rails 5, Kubernetes, Docker, Kafka, Grafana, OpenStack, Elixir, RabbitMQ, Redis, Perl
- Converting the application for parallel operation with Riak and Cassandra
- Migrating data (many terabytes) from Riak to Cassandra during operation
- Maintenance and refactoring of the projects
- Developing new features
Feb 2018 - Present
7 years 6 monthsSenior Software Architect & DevOps Engineer
Medical Industry (protected by NDA)
- Environment: Ansible, Kubernetes, GitLab, GitLab Pipelines, Ruby on Rails, Docker, Icinga/Nagios, Hetzner Cloud
- Provisioning new instances and bare-metal servers with Ansible
- Developing new features
- Maintenance
- Backup strategy
- Penetration test for REST API, Backend, Android app and iOS app
- Consulting for ISO 27001
Feb 2018 - Mar 2018
2 monthsSenior Developer & DevOps Engineer
- Project: Alexa Skill
- Environment: TypeScript, AWS (Lambda)
- Creating an Alexa skill that retrieves information from the user’s profile and then plays it back
Nov 2017 - Mar 2018
5 monthsSenior Developer
- Project: Microsoft Outlook Add-ins
- Environment: React, Redux, TypeScript, Rails 5
- Further development and maintenance of the XING Add-in
- Implementing new features
- Developing the measures necessary for GDPR compliance
May 2017 - Aug 2017
4 monthsLead Developer, Senior Software Architect, Agile Coach
Portal for job advertisements (protected by NDA)
- Environment: Elixir, Erlang, Ruby on Rails 5, Elasticsearch, Vue.js, Docker, Ansible, GitLab Pipelines, Kubernetes, Google Cloud Platform
- Building new applications to replace the old platform
- Hosting on Google Cloud
- Coaching the team and the customer
Jun 2015 - Present
10 years 2 monthsSenior Developer
Freifunk iOS App
- Environment: Swift
Jan 2015 - Apr 2017
2 years 4 monthsScrum Master, Lead Developer, Senior Developer, Product Owner, Product Manager, DevOps Engineer, IT Manager, Agile Coach, Senior
Avocado Store GmbH
- Environment: Ruby on Rails 3-5, Docker, Ansible, AWS, Elasticsearch, Netdata
- Introducing processes using Scrum
- Creating a customer database
- Further development of the marketplace
- Converting tracking (including Google e-commerce tracking)
- Platform hosting via AWS, managed hosting, bare metal
- Automation and integration of various parts
- Platform monitoring
Jan 2014 - Sep 2014
9 monthsLead Developer & DevOps Engineer
Metafoto GmbH
- Environment: Ruby on Rails 4, Elasticsearch, Swift, Objective-C, RubyMotion
- Establishing a platform for licensing images
- Creating an iOS app and a REST API
- Creating an Android app with a service provider
Jul 2013 - Oct 2013
4 monthsLead Developer & DevOps Engineer
Qwanji GmbH
- Environment: Ruby on Rails, Ember.js, Babushka, WordPress
- Establishing a commentary platform
- Hosting via managed hosting
Nov 2010 - Jun 2013
2 years 8 monthsLead Developer & DevOps Engineer
Wer liefert was? GmbH
- Environment: Ruby on Rails 3-4, jQuery, Elasticsearch, Nginx, F5
- Creating a prototype
- Developing the new platform
- Hosting on bare metal
Oct 2009 - Feb 2010
5 monthsDeveloper & DevOps Engineer
Avocado Store GmbH
- Environment: Ruby on Rails 2, AWS (EC2, Route 53, S3)
- Establishing and developing a new marketplace
- Hosting on Amazon Web Services
Jan 2008 - Sep 2009
1 year 9 monthsDeveloper
Wunderloop Media Service GmbH
- Environment: Ruby on Rails 2, Emediate Ad Server, ExtJS
- Further development of the Connect platform
- Building the mobile ad targeting structure
Feb 2007 - Feb 2007
1 monthCo-author
Linux Professionell Magazine
- Financial management
- Desktop publishing (DTP)
Jan 2007 - Jan 2008
1 year 1 monthDeveloper
Qype GmbH
- Environment: Ruby on Rails 2, Puppet, Solr
- Further development of the site
- Internationalization (I18n)
Jan 2006 - Dec 2017
12 yearsIT Consultant
AKRA GmbH
- Consulting for startups and relaunches
- Development with Ruby on Rails, JavaScript, Objective-C, Swift, Elixir and others
Jan 2003 - Dec 2006
4 yearsTrainee
Kontinuum Informationssysteme GmbH
- Customer support for the CRM system, among others
- Development with C++/PHP and others
- DevOps
- WiFi link over 7 km
- Telephone systems software (custom and Asterisk)
Languages
German
NativeEnglish
AdvancedSpanish
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