we do create cryptocurrency exchange with mobile in flutter for ios and android and we have created many exchanges before and delivered on time,  we are using cutting edge technology everything docker based deployment, please check following link for demo https://coincooper.com

Stack:

Backend:

- Go 1.18

- Grpc (replace management api) (management api is stupid idea)

- Vault

- Elasticsearch (search engine make your search very fast)

- Postgresql (database)

- Redis (cache like old and cache for frontend too)

- QuestDB (Timeseries database replace influxdb in old version)

- materialize (materialize.com is sql stream) (realtime chart for admin)

- Redpanda (Kafka like) (replace rabbitmq in old version)

Frontend

- Vue 3 + Nuxt 3