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Stashfin Tech Stack / Infra

Stashfin Infra Diagram​

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Tech Stack​

  1. Languages
    • Backend - PHP, Python
    • Frontend - HTML, CSS, JS, React
    • Android - Java + Kotlin, Firebase
    • iOS - Swift + Objective C
    • Libraries - Pandas, Numpy (other AI models and libraries)
  2. Frameworks - CodeIgniter 3 for PHP, Flask/FastAPI and Django for Python
  3. Unit Testing - Phpunit for PHP, Pytest for Python
  4. Databases - Aurora MySQL (OLTP), Redshift (OLAP), Redis (Caching and Queueing), S3 (blob storage) + Athena (Query layer on top of S3)
  5. Architecture - Microservices and Event Driven, REST Based
  6. Testing and QA Tools - Postman, Appium, Selenium
  7. DevOps - Docker, Kubernetes, Helm, Jenkins, Airflow, Prometheus + Grafana + Loki, Newrelic, Sentry, AWS (Cloud Provider)
  8. BI Tool - PowerBI
  9. Dev Tools - VSCode, Gitlab (git - VCS), Slack/Google Chats

Kubernetes EKS Infra / Stashfin Infrastructure and DevOps​

Deployment Infra​

  • Helm package management (client) - Updates - Whatup
  • Kubernetes Manifests
  • Jenkins (CICD)
    1. Pipeline
    2. Self service CICD

AWS​

  • VPCs
  • S3 - Athena
  • IAM
  • EC2
  • Spot Instances
  • Savings plan
  • Elastic Container Registry (ECR)
  • Pinpoint - AWS Firehose for delivery metrics
  • EKS
  • ELB (Classic LoadBalancers)
  • Amazon Rekognition
  • Amazon Textract
  • Amazon Transcribe

Databases​

  • Redshift
  • Aurora (RDS)
  • Redis
    1. RedisInsight
    2. Redis Streams
  • DynamoDB
  • S3 (Blob storage)

Airflow​

  • Postgres
  • Airflow web
  • Airflow flower
  • Celery Workers
  • Kubernetes Executor

Others Used​

  1. CloudFlare
  2. GitLab
  3. Kubernetes - Kubernetes Dashboard / BotKube
  4. Istio - Keycloak
  5. Sentry (Error Tracking)
  6. cert-manager and LetsEncrypt
  7. NewRelic (Application Performance Monitoring APM)
  8. Prometheus
  9. Alertmanager
  10. Grafana
  11. Locust (load testing)
  12. Application and Web Servers
    • Nginx
    • Apache
    • Gunicorn
  13. Application Development
    • Precommit
    • Crashlytics
  14. Testing
    • Selenium
    • Appium
    • Postman Runners (newman)
  15. Languages used
    • PHP (Codeigniter)
    • Java + Kotlin (Android)
    • Python (Fast API / Django / Flask)
    • Javascript (React)
  16. OpenVPN
  17. JupyterLab
  18. Analytics
    • PowerBI
    • Firebase
    • SonarQube
  19. Velero - Disaster Recovery
  20. Deployment Strategies
    • Blue/Green
    • Canary
    • A/B
    • Mirroring
  21. ExternalDNS

Others Alternatives POC​

  1. TICK
    • InfluxDB (device health monitoring)
    • InfluxDB (server health monitoring)
    • Kapacitor
    • Chronograf
    • Telegraf
  2. Kong (dbless)
  3. Konga
  4. Vernemq (mqtt broker)
  5. Druid - Zookeeper

Fintech Tools​