Haseeb A. - Full Stack Ruby on Rails Developer

Berlin, Germany

Experience

Oct 2021 - Present

4 years 3 months

Berlin, Germany

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

Apr 2017 - Oct 2021

4 years 7 months

Lahore, Pakistan

Led the architectural transformation of yallamotor.com, serving over 3M monthly sessions, migrating to microservices with Ruby on Rails and GraphQL APIs
Developed innovative automotive features including advanced search filters and real-time inventory management systems
Created robust dealer dashboards facilitating inventory management and lead tracking for 500+ automotive dealers
Streamlined payment processing by integrating various regional gateways with automated reconciliation
Optimized performance through Redis caching and AWS infrastructure, achieving significant cost reduction and high PageSpeed scores

Jul 2016 - Apr 2017

10 months

Lahore, Pakistan

Worked on multiple projects for US clients, contributing to the development of web applications using Ruby on Rails, JavaScript, HTML, and CSS
Collaborated with cross-functional teams, including product managers, designers, and quality assurance engineers, to deliver high-quality software products
Developed a chat application for tenants using web sockets and real-time communication technologies
Built and maintained APIs for various projects
Integrated with third-party APIs for payment processing, geolocation, and other services
Implemented Devise Token Auth to enable secure authentication and authorization
Developed a deep understanding of software development best practices, including Agile methodologies, test-driven development (TDD), and continuous integration and deployment (CI/CD)

Backend Frameworks: Ruby on Rails, Ruby, FastApi, Python
Frontend Frameworks: React, Redux, Javascript, Hotwire, HTML, Turbo
Deployment: Heroku, DigitalOcean, AWS, Kubernetes, Docker, FastApi Cloud, Render
Cloud Services: AWS Lambda, AWS S3, AWS Cognito, AWS SNS, API Gateway, EC2, RDS, AWS Lex, AWS AppSync
Database: MySQL, PostgreSQL, Aurora Serverless DB, SQLAlchemy ORM, Alembic
Caching: Redis, Memcache, Varnish, Page Caching
Payment Integration: Stripe Subscription, PayPal, Payfort
E-commerce Platforms: Solidus, Spree, Mirakl, Klaviyo
API Documentation: Graphql, Swagger, Graphiql, Hasura, Pydantic
Authentication: SAML, OAuth, JWT, AWS Cognito
Background Jobs: Sidekiq, Kafka, Delayed Jobs
AI Tools: Hasura, Claude Code, LLM Integration