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Martin Wilhelmi
Security Auditor
Hamburg, Germany
Experience
Aug 2023 -
Present
1 year 11 months
Security Auditor
MissionMe
Environment: AWS, Ruby on Rails, GraphQL, React Native
Penetration test for Backend, Android-App and iOS-App
May 2023 -
Sep 2023
5 months
Senior 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 special configured instances with Ansible on AWS
Build and develop of new features
Backup Strategy on AWS for MSSQL
Deploy Staging and Production Environment on AWS with Terraform including S3, Elastic Beanstalk, EC2, SES, SNS and more services
Apr 2023 -
Present
2 years 3 months
Senior Software Architect
Medical Industry (protected by NDA)
Environment: Ruby on Rails
Creating accounting software for billing
EDIFACT generation for GKV (gesetzliche Krankenversicherung) accounting
Testing
Sep 2022 -
Nov 2022
3 months
Senior Software Architect
Graylog
Environment: OpenSearch, Python, Debian, Ubuntu, GitHub
Writing a design issue to document the approach to build a DEB package for OpenSearch
Extend OpenSearch Build project to build a DEB package
Apr 2022 -
Nov 2022
8 months
Senior Software Architect
Graylog
Environment: React, TypeScript, Java, Docker, GitHub
Further development of the React frontend
Maintenance and refactorings of deprecated and legacy code
Development of new features
Oct 2021 -
Present
3 years 9 months
Security 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 2 months
DevOps Engineer
MissionMe
Environment: AWS, Postfix, Dovecot, Sieve
Restructure sending and receiving emails
Transfer of support e-mails
Consulting for topics like AWS
Dec 2020 -
Mar 2022
1 year 4 months
Senior Software Architect
Financial Industry (protected by NDA)
Environment: Vue.js, TypeScript, Ruby on Rails, GitLab, Cypress, Google Cloud
Further development of the Rails backend and the Vue.js frontend
Maintenance and refactorings of deprecated and legacy code
Development of new features
May 2020 -
Jul 2023
3 years 3 months
Senior Developer & DevOps Engineer
Hochzeitsplaner
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
Development of new features
Maintenance
Jun 2019 -
Apr 2020
11 months
Senior 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 Repeat Payments
Further development of the React frontend and Rails backend of two applications
Hosting a new application on AWS with Elastic Beanstalk
May 2019 -
Jun 2019
2 months
DevOps 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
Docker container created from existing Rails, Scala and Node projects and its deployment in Kubernetes
Apr 2018 -
Mar 2019
1 year
Senior Developer
XING
Project: Startpage
Environment: Cassandra, Riak, Rails 5, Kubernetes, Docker, Kafka, Grafana, OpenStack, Elixir, RabbitMQ, Redis, Perl
Conversion of the application for parallel operation with Riak and Cassandra
Migration of data (many terabytes) from Riak into Cassandra during operation
Maintenance and refactorings of the projects
Development of new features
Feb 2018 -
Present
7 years 5 months
Senior 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
Development of new features
Maintenance
Backup Strategy
Penetration test for Rest API/Backend/Android-App/iOS-App
Consulting for ISO 27001
Feb 2018 -
Mar 2018
2 months
Senior Developer & DevOps Engineer
XING
Project: Alexa Skill
Environment: TypeScript, AWS (Lambda)
Creating an Alexa skill which retrieves information from the user's profile and then plays it back
Nov 2017 -
Mar 2018
5 months
Senior Developer
XING
Project: Microsoft Outlook Add-Ins
Environment: React, Redux, TypeScript, Rails 5
Further development and maintenance of the XING Add-In
Implementation of new features
Development of the measures necessary for the GDPR
May 2017 -
Aug 2017
4 months
Lead 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 via Google Cloud
Coaching of the team and the customer
Jun 2015 -
Present
10 years 1 month
Senior Developer
Freifunk iOS App
Environment: Swift
Jan 2015 -
Apr 2017
2 years 4 months
Scrum Master, Lead Developer, Senior Developer, Product Owner, Produkt Manager, DevOps Engineer, IT-Leiter, Agile Coach, Senior
Avocado Store GmbH
Environment: Ruby on Rails 3-5, Docker, Ansible, AWS, Elasticsearch, Netdata
Introduction of processes with the help of Scrum
Creation of a customer database
Further development of the marketplace
Conversion of tracking (including Google e-commerce tracking)
Platform hosting including AWS, managed hosting, bare metal
Automation and connection of various parts
Plattform Monitoring
Jan 2014 -
Sep 2014
9 months
Lead Developer & DevOps Engineer
Metafoto GmbH
Environment: Ruby on Rails 4, Elasticsearch, Swift, Objective-C, RubyMotion
Establishment of a platform for licensing images
Create an iOS app and a REST API
Creating an Android app with a service provider
Jul 2013 -
Oct 2013
4 months
Lead Developer & DevOps Engineer
Qwanji GmbH
Environment: Ruby on Rails, Ember.js, Babushka, Wordpress
Establishment of a commentary platform
Hosting via Managed Hosting
Nov 2010 -
Jun 2013
2 years 8 months
Lead Developer & DevOps Engineer
Wer liefert was? GmbH
Environment: Ruby on Rails 3-4, jQuery, Elasticsearch, Nginx, F5
Prototype creation
New development of the platform
Hosting via Bare Metal
Oct 2009 -
Feb 2010
5 months
Developer & DevOps Engineer
Avocado Store GmbH
Environment: Ruby on Rails 2, AWS (EC2, Route 53, S3)
Establishment and development of a new marketplace
Hosting via Amazon Web Services
Jan 2008 -
Sep 2009
1 year 9 months
Developer
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 month
Co-Autor
Linux Professionell Magazine
Financial Management
Desktop-Publishing (DTP)
Jan 2007 -
Jan 2008
1 year 1 month
Developer
Qype GmbH
Environment: Ruby on Rails 2, Puppet, Solr
Further development of the site
Internationalization (I18n)
Jan 2005 -
Dec 2017
12 years
IT-Consultant
AKRA GmbH
Consulting for start-ups and relaunches
Development with Ruby on Rails, JavaScript, Objective-C, Swift, Elixir and others
Jan 2003 -
Dec 2006
4 years
Trainee
Kontinuum Informationssysteme GmbH
Customer support of the CRM system, among others
Development with C++/PHP and others
DevOps
WiFi line over 7 kilometer
Telephone systems software (Self-developed and Asterisk)
Languages
German
Native
English
Advanced
Spanish
Elementary
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