Martin Wilhelmi - Security Auditor

Hamburg, Germany

Experience

Aug 2023 - Present

2 years 5 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 development 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 9 months

Senior Software Architect

Medical Industry (protected by NDA)

Environment: Ruby on Rails
Creating accounting software for billing
EDIFACT generation for GKV (statutory health insurance) 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

4 years 3 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 8 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

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
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 – 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 11 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 – 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 – 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 7 months