Project Roulette / Projects

Mobile and DevOps & Cloud projects

5 of 30 projects. Each has a stack, five features to ship, a difficulty, a time estimate, and a bonus challenge.

Mobile · Intermediate · 2–3 weeks

Offline-first Field Inspection App

A mobile app for technicians who inspect equipment on site: checklists, photos, and signatures that work with no signal and sync later.

  • React Native (Expo)
  • TypeScript
  • SQLite
  • Supabase

Features

  1. Dynamic checklist templates loaded from the server
  2. Photo capture with on-image annotation
  3. Local-first storage with background sync and conflict handling
  4. Signature capture and PDF report export
  5. GPS-tagged inspections

Bonus: A small web admin dashboard where managers create templates and review submitted inspections.

Mobile · Intermediate · 2 weeks

Bluetooth LE Sensor Companion App

A phone app that discovers a Bluetooth Low Energy sensor, streams live readings, keeps a history, and sends settings back to the device.

  • Flutter (Dart)
  • flutter_blue_plus
  • SQLite
  • ESP32 or nRF52 as the peripheral

Features

  1. Scan, connect, and auto-reconnect to the device
  2. A custom GATT service and characteristics that you define
  3. Live charts of incoming readings
  4. Local history with CSV export
  5. Write settings like sample rate and thresholds back to the device

Bonus: Firmware updates delivered over Bluetooth straight from the app.

DevOps & Cloud · Advanced · 2–3 weeks

GitOps Kubernetes Home Lab

A fully automated Kubernetes cluster where pushing to Git builds, scans, and deploys your apps, with monitoring and alerts built in.

  • Terraform
  • k3s
  • Argo CD
  • Helm
  • Prometheus
  • Grafana
  • GitHub Actions

Features

  1. Infrastructure as code for all VMs or cloud instances
  2. CI pipeline that builds, scans, and pushes container images
  3. Argo CD auto-sync from a Git repository
  4. Grafana dashboards and alert rules
  5. Secrets managed safely with Sealed Secrets

Bonus: Canary rollouts that roll back automatically when the error rate spikes.

DevOps & Cloud · Intermediate · 1–2 weeks

Distributed Tracing Playground

Three small microservices instrumented end to end, so you can follow a single request across every service with linked logs, metrics, and traces.

  • OpenTelemetry
  • Docker Compose
  • Jaeger or Tempo
  • Prometheus
  • Grafana
  • Loki

Features

  1. Three services in two languages, instrumented with OpenTelemetry
  2. Trace context carried through HTTP calls and a message queue
  3. Dashboards for rate, errors, and duration
  4. Logs linked to their trace IDs
  5. SLOs with burn-rate alerts

Bonus: A fault-injection switch that adds latency or errors so viewers can see exactly how problems show up.

DevOps & Cloud · Intermediate · 1–2 weeks

Serverless Media Pipeline on AWS

Upload an image or video and an event-driven pipeline resizes, transcodes, and tags it automatically. All infrastructure is defined in code.

  • AWS S3, Lambda, SQS, DynamoDB
  • AWS CDK or Terraform
  • TypeScript or Python
  • GitHub Actions

Features

  1. Direct uploads using presigned URLs
  2. S3 events feeding SQS and Lambda, with retries and a dead-letter queue
  3. Thumbnails and metadata stored in DynamoDB
  4. Least-privilege IAM roles for every function
  5. CI/CD that deploys separate dev and prod stages on merge

Bonus: A cost report in the README showing the real cost per 1,000 uploads.