Gwen Glaser
Senior Ruby on Rails Developer | Technical Product Owner
Experience
Senior Ruby on Rails Developer
Sapiens
Senior Consultant
VivoSensMedical GmbH
Concept, advising, and implementation of fundamental system upgrades of the legacy software (mobile API, web apps) as of 2014/15 to a modern tech stack.
- Strategic consulting of CTO and Head of Product for tech stack management regarding the product vision
- Optimised performance and profoundly simplified the overall system architecture, unlocking cost savings and improvements to the development process Updated the Linux OS, Ruby, Rails, nodeJS, MongoDB as well as other libraries; adapting code and tooling for development, build and deployment; implemented server provisioning with Ansible, introducting IaC
- Ported a Sinatra app to Ruby on Rails, with wide-ranging refactoring, using Hotwire, Stimulus and Tailwind
- Introduced a container based DevOps workflow using Docker Compose and Hashicorp Nomad
TECH: Ruby on Rails 3 → 7 · Sinatra · R · MongoDB 2 → 6 · nodeJS 0.8 → 16 · Javascript · Typescript · BackboneJS · CoffeeScript · Redis · Hotwire · Turbo · StimulusJS · TailwindCSS · Git · PRTG → Prometheus · Loki · Grafana
TOOLS: Ansible · Capistrano → Nomad · VMware · LXC → Docker · Git · Github · Centos Linux → Ubuntu & Alpine Linux · OpenProject
Lead Developer
Die Produktmacher
Development of a new web app for medical personnel to collect treatment and drug consumption data of haemophilia patients, and report those to the German Haemophilia Registry (DHR). Interfaces to an internal JSON API and to the DHR SOAP API provided by Adjumed.
- Supported the client with crucial product concept considerations and UX design
- Designed the system's architecture and data model
- Developed critical components, e.g. a SOAP-API client with 2FA via IMAP
- Data management and protection according to medical technology standards
TECH: Ruby 3 · Rails 6/7 · PostgreSQL · Redis · Sidekiq · JSON-API · SOAP · XML · IMAP · HotwireJS · Turbo · StimulusJS · Less CSS · RSpec · Service Objects · Design Patterns · Feature Flags
TEAM: Full remote · Jira · Confluence · Slack · MS Teams · Google Meet · Github · Pair programming · Code Review
TOOLS: Figma · Make · Docker · CircleCI · AWS
PROCESS: Internally agile (SCRUM) · client-side waterfall
Software Architect and Lead Developer
DistriSmart GmbH
Hired and lead the development team for the 2014 relaunch of the price comparison shop for office supplies. Controlling of a complex refactoring process of core components for a business model pivot from B2B to B2C. From 2018 on further development, maintenance and support (part time), advising the new owners of potential directions of product development.
- Technical Lead of 4-6 developers; interviewing and onboarding
- Planning and implementation of functional extensions for B2C customers
- Development of a new system architecture using service objects, i.e. Interactors
- Payment process integration via Payone, Paypal, and later Stripe
- Integration and development of various interfaces: BMECat, eClass, WebValid, ClosedFinance, Optiva, TrustPilot, as well as data import from CSV and XML files
- Implementation of JSON APIs for article data, bulk prices, inventory; integrating an in-house ERP system
- Upgrade from Rails 3 to Rails 4, migration from MySQL to PostgreSQL
- Preparation of scaling concepts, load tests
TECH: Ruby on Rails 3-5 · MySQL · PostgreSQL · Memcache · Sphinx · ElasticSearch · DelayedJob · Prawn · RSpec · Cucumber · JSON · XML · SASS/CSS · jQuery3 · ActiveInteraction · StateMachine
TEAM: Full remote · Slack · Google Meet · Asana · Gitlab · PivotalTracker · Code Review · Semi-Agile inspired by SCRUM
TOOLS: Ubuntu Linux · Baremetal Server · Ansible · Capistrano
Interim CTO
Wimdu GmbH
Regular board meetings; hiring process and technical interviews for CTO candidates, onboarding of and hand-over to the CTO successor.
Technical Product Manager
Wimdu GmbH
Advisory cooperation with the product owners team. Technical lead of up to 25 developers, including a near-shore team. Driving large-scale refactoring processes for performance improvements to the systems architecture and in the development processes, as well as to enable compliance features.
Senior Ruby on Rails Developer
Wimdu GmbH
Developed many new features of the then-leading European accommodation market place. Lead the onboarding process for new developer teams as well as for product managers.
- Interviewing, team lead, moderation, coaching
- Guided the transition from a monolithic to a (micro-) service-based architecture
- Introduced organisational improvements, e.g. an internal RFC process inspired by EmberJS & Rust
- Payment integration via Adyen, for incoming and outgoing payments in several currencies
- Integration of GetYourGuide's REST APIs
- Compliance topics: implementing GDPR; extended KYC for payment receivers (hosts)
TECH: Ruby on Rails 4/5 · service objects · dry-rb · GraphQL · MySQL · ElasticSearch · Redis · Sidekiq · Memcache · Haml · Sass · Compass · BackboneJS · ReactJS · TDD · RSpec · Capybara · Watir · Cucumber · A/B Testing · Feature Flags
TEAM: Hybrid remote/in office · Slack · Google Meet · Jira · Confluence · Trello · Github · Pair programming · Tech Talks · Hackathons
TOOLS: Capistrano · LHM for MySQL · Docker · Chef · Puppet · Terraform · Heroku · AWS CloudFormation · S3 · Rackspace
PROCESS: SCRUM / LESS, moderating all ceremonies · Kanban · Engineering Meetings
Software Architect and Lead Developer
DistriSmart GmbH
Hired and lead the development team for the 2014 relaunch of the price comparison shop for office supplies. Controlling of a complex refactoring process of core components for a business model pivot from B2B to B2C.
- Technical Lead of 4-6 developers; interviewing and onboarding
- Planning and implementation of functional extensions for B2C customers
- Development of a new system architecture using service objects, i.e. Interactors
- Payment process integration via Payone, Paypal, and later Stripe
- Integration and development of various interfaces: BMECat, eClass, WebValid, ClosedFinance, Optiva, TrustPilot, as well as data import from CSV and XML files
- Implementation of JSON APIs for article data, bulk prices, inventory; integrating an in-house ERP system
- Upgrade from Rails 3 to Rails 4, migration from MySQL to PostgreSQL
- Preparation of scaling concepts, load tests
TECH: Ruby on Rails 3-5 · MySQL · PostgreSQL · Memcache · Sphinx · ElasticSearch · DelayedJob · Prawn · RSpec · Cucumber · JSON · XML · SASS/CSS · jQuery3 · ActiveInteraction · StateMachine
TEAM: Full remote · Slack · Google Meet · Asana · Gitlab · PivotalTracker · Code Review · Semi-Agile inspired by SCRUM
TOOLS: Ubuntu Linux · Baremetal Server · Ansible · Capistrano
Senior Ruby Developer
Saxiona AG
Development of new features, refactoring, architectural consulting and third level support for AMOS, an in-house backend system for high-profile web shops (e.g. bonprix.ru, quelle.ru, otto.ru)
TECH: Ruby · JRuby · RubyQt · ActiveRecord · SOAP · Oracle · PL/SQL
TOOLS: Subversion · Windows · Vagrant · Ubuntu Linux · Qt Designer · Oracle SQL Developer
PROCESS: Classic waterfall