Jeevansathi
Firebase Remote Config, replaced
Built an in-house feature-configuration platform (Spring Boot, Redis, MongoDB) that replaced Firebase Remote Config after it moved to a paid tier.
- $70,000/year licensing cost eliminated
- 10M+ requests/day
What I do, 4 of 5
Backends that hold up
Event-driven backends that keep working when traffic spikes or a server dies.
The problem
- Services that slow down or fall over at peak traffic.
- One failure cascading across the system.
- Config or behaviour changes that need a deploy.
Try it
A small working tool. Change the numbers.
Break it and watch it recover
Events flow through a topic with three partitions to three consumers. Spike the traffic or stop a consumer. Nothing gets lost: the group rebalances and works through the backlog.
0events processed
0waiting (consumer lag)
0events lost
All 3 consumers healthy.
Where I've done it
Jeevansathi
Event-driven matching on Kafka
Designed a fault-tolerant, event-driven matching algorithm on Kafka and NoSQL stores.
- 500,000+ users connected
Jeevansathi
Real-time GenAI matchmaking
Delivered a real-time GenAI matchmaking engine using Spring Boot, Openfire (XMPP) and Aerospike, orchestrating GPT, Gemini and Qwen through a LangChain/LlamaIndex RAG pipeline on RedisVL vector search.
- 99.9% uptime
99acres
API aggregator
Standardised cross-service calls through a containerized Spring Boot API aggregator with unified headers.
- 15% lower API latency
Jeevansathi
Breadth across production services
Shipped changes across dozens of production microservices.
Config panelIllustration
home_screen_variantAndroid- app version = 33.5
"off"a build with a known bug - app version >= 34.0
"v2"new home screen - app version >= 33.0
"v1" - no rule matches
app default
The app gets "v2"
How I'd do it for you
Decouple with events
Services talk through Kafka or RabbitMQ, so one slow consumer doesn't block the rest.
Cache what's hot
Redis and ETags keep repeat reads off the database.
Fail safe
Every dependency has a timeout and a fallback.
Need this?
Tell me what you're working with. I'll tell you honestly whether it's worth doing and roughly what it takes.
Email me about this