01
Senior by default
Every engagement is led by architects and lead developers — not staffed up with juniors learning on your budget. The senior who scopes your project is the one who builds it, and stays on it.
About Us
A small team that goes deep, not wide.
Hello World Tech Consulting LLP is a senior-led Spring AI and Java consultancy — architects with 14 to 20 years each. We build and modernise the backend systems a business actually runs on, and we put production AI inside them. For engineering teams in the US, UK, Europe and Australia.
01 Our Mission
Make enterprise Java the best place to build AI — so the systems you already run can start to think, without a rewrite.
Most companies do not need a new platform. They need the one they already have to search their own data, answer in their own language, and stay upright when the load arrives. That is the whole job — and for a Java team, Spring AI is now the shortest honest path to it. No parallel Python stack to staff and secure. No rip-and-replace. No demo that quietly never reaches production.
Add AI where the data already lives
RAG, vector search and MCP servers built inside your existing Spring Boot app — talking to a ChatClient, not a vendor SDK. No parallel Python service to staff and secure.
Modernise without stopping the business
Strangler-fig decomposition, an outbox for reliable events, idempotent consumers and zero-downtime cutovers. The monolith keeps serving traffic while it's taken apart.
Prove it with numbers, not adjectives
Latency, throughput, migration time, eval scores against a fixed test set. We report what moved, and we say when it didn't.
02 Our Story
Why we bet the firm on Spring AI
For most of the last decade, adding AI to a Java application meant standing up a Python service beside it — a second stack to deploy, secure, staff and keep in sync with a codebase that already worked. We watched good teams stall at exactly that point. The demo impressed everyone; the production rollout never came.
Spring AI closed that gap. Your business logic talks to a ChatClient and a VectorStore instead of a vendor SDK, so retrieval-augmented generation, semantic search and tool-calling live inside the Spring Boot app you already run — testable with the tools you already use, portable across model providers as a configuration change. That is the whole reason this consultancy is pointed where it is.
The backend depth underneath is not decoration — it is what makes the AI part survive. We have shipped production systems across applied AI, fintech, e-commerce, civic-tech and big-data engineering: an embeddings-powered sourcing assistant with a native Java MCP server (OptaAI), a RAG recommender on self-hosted LLMs, a cross-platform fintech app with Stripe and Plaid, a civic-action platform on Google Cloud Run, and a Cassandra-to-PostgreSQL migration on Apache Spark — delivered with Terraform, Kubernetes and GitOps on AWS and GCP.
03 How We Work
Principles we engineer by
02
Numbers over adjectives
We measure what we ship — query latency, throughput, migration time, eval scores against a fixed test set — and report it straight, including when it didn't move.
03
The simplest thing that survives production
We will tell you when you don't need an LLM, when a single service beats five, and when the boring answer is the correct one. Advice we can't defend isn't worth billing for.
04
We name the pattern
Strangler fig. Transactional outbox. Idempotent consumers. Circuit breakers. RAG with grounded citations. If we can't name what we're doing and why, we don't understand it well enough to charge you for it.
04 The Team
Architects & lead developers
SPS
SPS Kohli
Founder & Principal Architect
16+ years in Java and distributed systems. Leads architecture, Spring AI integration and delivery across the team.
AV
Ankit V
Principal Architect
Seasoned software architect with 20+ years building backend systems, specialising in microservices, Kafka and cloud-native deployment.
TC
Teena Chhabra
Testing · Cloud
Automation, performance testing and CI/CD across AWS, GCP and Kubernetes.
05 By the numbers
A track record you can verify
Registered as an LLP in Gorakhpur, India. Our references are named, contactable people — not anonymous logos — and our longest-running engagement has now passed two years.
14–20
Years of experience, per engineer
100%
Senior-led engagements
24h
Response time
Let's build something together.
Tell us where you want to go — we'll engineer the path to get there.