Collin K. - Software architect / Fullstack Developer

Mönchengladbach, Germany

Experience

Jan 2023 - Present

2 years 8 months

Built an international e-commerce platform from scratch
Developed cloud native applications to provide a multi-vendor marketplace for various digital assets (e.g. NFTs)
Designed and operated a microservice architecture using Nest.js, Postgres, Redis, Hasura, Algolia, Docker and Serverless
Created CI/CD pipelines with GitHub Actions for automated deployment of applications
Provisioned the entire infrastructure using Terraform on AWS
Integrated Stripe to handle international payments
Used Algolia for real-time search of digital assets on the platform
Federated services with GraphQL and Hasura
Discussed architecture decisions of the IT landscape and their impacts
Used message queues for in-app communication / component encapsulation
Test Driven Development – (Unit / Integration / E2E) testing with JUnit
Used Next.js / React (with SASS / SCSS) for frontend applications
Integrated security mechanisms (e.g. JWT tokens with Auth0, OAuth, OIDC, IP guards, BOLA, Secret Vaults)
Created microfrontends using Retool for the business department for rapid prototyping / testing of features
Used nx monorepo with nrwl

Mar 2022 - Dec 2022

10 months

Integrated services into a streaming data ecosystem
Developed cloud native applications
Designed and operated a streaming data architecture using Nest.js, MySQL, Redis, Kafka (with JSON schemas) and Docker
Created CI/CD pipelines in Bitbucket for automated application deployment
Tested and evaluated new techniques for more stable / faster / secure / sustainable application development
Applied Domain Driven Design within own bounded contexts
Presented results to stakeholders / held internal meetups
Deep discussions on micro and macro architecture decisions of the IT landscape
Advised internal staff on implementing functional and technical requirements
Created architectural design proposals for software developers
(Unit / Integration / E2E) testing with JUnit, Cypress
Used Vue.js (with SASS / SCSS) for frontend applications
Implemented an internal component library / styling guides for Vue.js
Used message queues for in-app communication

Jun 2018 - Mar 2022

3 years 10 months

Insurance startup that I supported from the ground up
Developed cloud native applications
Designed and operated a streaming data architecture on Flink, Kafka (with AVRO schemas) and Cassandra
Supported actuary department with data collection, processing and analysis
Maintained and operated cloud infrastructure on AWS
Integrated web scrapers (Serverless / AWS Lambda)
Designed and implemented data protection and IT security in collaboration with the Data Protection Officer
Technical lead for data engineers and DevOps engineers
Led team as interim Product Owner
Created CI/CD pipelines in GitLab for automated application deployment
Created / prototyped chatbots
Prototype Rasa NLU
In production Ebot-7
Tested and evaluated new techniques for more stable / faster / secure / sustainable application development
Presented results to stakeholders / held internal meetups
(Unit / Integration / E2E) testing with JUnit, Cypress, Selenium, Puppeteer
Used Vue.js / Angular (with SASS / SCSS) for frontend applications
Used GraphQL to interact with the backend