RSpec Experts in Germany

Software solution company that offers tools for data-driven campaign management for Amazon Ads.

• From scratch, developed an insights tool for the Amazon DSP with several data pipelines to support reports
• Developed new backend features for the Ad Optimiser tool
• Developed and maintained data pipelines for the Ads reports
• Wrote unit tests and reviewed code from other developers
• Supported frontend developers and performed frontend development tasks

• Collaborated with stakeholders to gather requirements and use cases for new features, made implementation plans, and tracked progress.
• Improved internal links for more than 60,000 public pages by unifying link texts.
• Increased conversion of new talents by 30% without significantly dropping their quality.
• Reduced the cycle of blog domain creation from two months of engineering work to a process handled by content editors.
• Created a light, adjustable Hanami CLI application to prepare data for the Grafana team’s KPI dashboard.
• Generated content sections of public pages with data from Kafka and BigQuery, enabling almost real-time data on public pages.
• Coordinated with cross-functional teams on high-priority tasks, addressing technical challenges and balancing multiple responsibilities to meet project goals.
• Delivered urgent updates for critical website components, ensuring timely delivery and smooth functionality under tight deadlines.
• Assisted teammates with Docker, service deployment, and backend implementation questions.

• Spearheaded the development and maintenance of multiple Ruby on Rails applications, ensuring high availability and performance for time-critical and performance-sensitive systems in the mobility services sector.
• Analyzed, debugged, and resolved complex application issues, improving system reliability and reducing downtime by implementing robust bug-fixing and code optimization practices.
• Enhanced testing frameworks using RSpec and integrated continuous integration pipelines via CircleCI and Docker, achieving faster deployments and higher code coverage.

• Further development of an application for managing personnel changes.
• Development of frontend and backend.
• Implementation of the frontend with React and Material UI.
• Implementation of the backend with Java and Spring Boot.
• Use of React, Java, Spring, TypeScript, next.js, Material UI, Github Enterprise, Figma, Docker, Playwright, swagger, swagger UI, OpenAPI, npm, yarn, git.

• Technologies: Ruby on Rails (MVC), JavaScript, CircleCI, Convert, Hotjar, Bugsnag, Git, GitHub, Cursor
• Developed and maintained full-stack features using Ruby on Rails and JavaScript.
• Designed and implemented A/B tests to optimize user experience and product engagement.
• Created and executed RSpec unit and integration tests, ensuring high reliability.
• Contributed to CI/CD pipelines using GitHub Actions to automate deployments.
• Collaborated in cross-functional Agile teams, performed code reviews, and improved application performance and maintainability.

• Led the implementation of a critical backend initiative for the offer teasing feature, resulting in a 10% increase in users actively seeking counter offers.
• Contributed to high-impact features such as instant advice, customer ratings, and automatic contract switching, leading to increased user engagement and conversion rates.
• Built a gRPC service to integrate internal systems with the ERP platform, improving the reliability and observability of data exchange.
• Refactored parts of the legacy Ruby codebase into a more maintainable and scalable Elixir-based architecture.
• Delivered a greenfield project from concept to production on a new stack, integrating with internal services and managing infrastructure setup and deployment.
• Collaborated closely with the front-end team, product managers, and cross-functional team members to ensure the seamless integration of backend features, fostering effective communication and collaboration across disciplines.
• Stack: Ruby, Ruby on Rails, Elixir, OTP, Phoenix, REST, GraphQL, gRPC, PostgreSQL, AWS, Cognito, Lambda, SNS, SQS, Terraform, Helm, Docker, CI/CD, Grafana, Prometheus, Git, Agile Methodology.

• Developed and maintained a translation management platform integrating with TRADOS and ACROSS CAT tools for seamless document exchange.
• Designed and optimized database schema to support scalable multilingual document workflows.
• Built RESTful APIs to enable communication between servers and microservices.
• Implemented front-end modules using Vue.js for interactive, user-friendly interfaces.
• Applied Camunda process engine for workflow automation, task tracking, and project status management.
• Conducted performance monitoring and optimization for critical application components.
• Practiced Test-Driven Development (TDD) with RSpec and Capybara to ensure code quality and maintainability.
• Enhanced deployment workflows by modifying Bitbucket Pipelines for automated code pushes and deployments.

• Electronic logbook app developed for research centers to maintain their investigations.
• Emphasizes user-driven organization of communication: experiment groups can configure information structure and notifications, while principal investigators maintain full access control.
• Real-time integration with the facility’s metadata catalogue, control system Karabo, and data analysis tool enables the automatic logging of key events, complemented by manual entries as needed.

• Upgraded Ruby from 2.7 to 3.1, boosting application performance by 30% and reducing technical debt.
• Integrated Zendesk Messenger into the customer support platform, streamlining communication workflows and increasing support efficiency by approximately 25% through faster response times and improved issue resolution.
• Orchestrated the migration of 65,000+ Schutzklick customer records to a new cloud platform, achieving zero downtime and accelerating data access speeds by 40% for internal teams.
• Implemented JumpCloud SSO for 500+ admin users, strengthening platform security and access control.
• Conducted k6 load testing, enabling the platform to support 10,000+ concurrent users without degradation.

• Project for mobile users to perform physiotherapy remotely.

• Migration of the B2B section from Vue to Astro with new user management and statistics pages
• Languages: TypeScript (React, Astro, Node, Jest), Ruby (Ruby on Rails, rspec), CSS (Tailwind, SCSS), GraphQL, MongoDB
• Tools: Jira, Figma, npm, Git, GitHub Actions, Docker, AWS (Lambda, SQS, S3)

• Delivered MVP for strategic enterprise client including core Links banking APIs and interest rate calculations
• Integrated German banking APIs for automated credit checks
• Built lead distribution system that improved sales team efficiency by 40%
• Developed microservices architecture for mortgage offer generation from multiple banks
• Automated document verification process for customer KYC and income validation
• Implemented GDPR-compliant consent management for customer data protection
• Deployed and managed services using Kubernetes with custom YAML configurations
• Wrote comprehensive test coverage using Rspec ensuring code reliability
• Reduced customer onboarding time by 30% through workflow optimization

• Implementing new features using best practices for a long running e-commerce and content management platform used by a large variety of different customers.
• Technologies: Ruby on Rails, Ruby, REST, PostgreSQL, TDD, RSpec, Testing
• Domain: e-commerce, CMS

• Built out backend services in Golang, TimeScaleDB, and GCP, handling 10K+ reads concurrently.
• Migrated from RedPanda to a local service written in Golang, reducing latency and business cost.
• Added A/B testing using Open Replay to analyze customer behavior along with performance.
• Collaborated with marketing and firmware teams to successfully launch the MVP on time to pitch to potential customers.
• Streamlined testing and deployments by creating GitHub Actions to check for failing tests and lint errors, and deploying both staging and production releases efficiently.