AI
Inside the Black Box of AI: How Data Labeling and Annotation Really Work
Imagine a self-driving car merging onto a highway, recognising traffic lights and predicting where a cyclist is heading next. Or a warehouse robot weaving...
17 min read
Full-stack AI & data company
We build AI and data systems that move the number.
Welzin is a full-stack AI and data company: data science, AI engineering, and the MLOps to keep it running. We move your numbers - revenue, risk, uptime, margin - shipped by senior engineers, in production from day one.
Data Science & ML
Statistical and ML modeling that turns messy data into decisions.
AI Engineering
RAG, copilots, and autonomous agents, grounded with evaluation and guardrails.
MLOps & Ownership
The pipelines and monitoring to keep it running; we own the metric, end to end.
Work that moved the number.
Real systems in production for real teams. We scope to the metric that matters, ship it,
and stay accountable to moving it - shoulder to shoulder with the people who own the result.
3x
Organic reach
Learn moreClient impact
Rewiring how brands stay visible in the age of AI search
Search is being rebuilt around answers, not links. CogNerd optimizes brands for ChatGPT, Gemini, Claude and Perplexity - keeping organic reach from quietly disappearing into AI answers.
6:1
Services vs software spend
Client impact
Services are the new software, and the full-stack firm wins
The world spends six dollars on services for every one on software. AI is finally coming for that larger number. A field guide to the full-stack AI firm, the shift from selling tools to owning outcomes, and why Welzin was built for it.
Learn more92%
Calls resolved
Client impact
A voice agent that answers, books, and closes the loop
A national home-services brand was losing calls to hold times and after-hours gaps. Welzin shipped a production voice agent that answers naturally, books appointments, and writes back to the CRM - with guardrails and full observability.
Learn more100%
Cash traceability
Client impact
The last mile, finally on a ledger
A financial system of record for the field - where the cash is collected, the deliveries are made, and the money has always been hardest to see.
Learn more31%
Fewer stockouts
Client impact
Demand forecasting wired straight into replenishment
A national retailer was forecasting in spreadsheets and paying for it twice: stockouts on the fast movers, working capital buried in the slow ones. Welzin shipped a forecasting system that feeds replenishment directly - backtested, monitored, and owned to the metric.
Learn more
What we do
Our services.
Five disciplines, one senior pod - from the first model to a system running in production.
View all servicesData Science
We turn messy, real-world data into models and insight you can act on - rigorous, validated, and tied to a business question that matters.
- Exploratory data analysis
- Statistical & ML modeling
- Experiment design & A/B testing
- Customer & revenue analytics
- Feature engineering
- Data storytelling
Predictive Analytics
Forecast what happens next - demand, churn, risk, revenue - and wire those predictions straight into the decisions that depend on them.
- Forecasting
- Churn & risk
- Anomaly detection
AI Engineering
Production Generative AI and autonomous agents - RAG, copilots, and tool-using workflows, grounded with evaluation and guardrails.
- RAG
- Agents
- Evals & guardrails
MLOps / AIOps
Keep models and AI systems healthy in production - automated pipelines, monitoring, and the observability that catches drift before your users do.
- CI/CD
- Monitoring
- Governance
Engineering Development
Full-stack product engineering around your AI - APIs, web and mobile apps, cloud infrastructure, and the data platforms that ship and scale it.
- Web & mobile
- APIs
- Cloud & DevOps
Scoped to a number.
The outcomes every engagement is scoped to move - the numbers a senior pod signs up to own, from the first model to a system running in production.
See our workReturn rate94%
of clients come back for the next build
Reliability99.95%
uptime across platforms we operate
Time to value6 wks
median time to first measured result
The stack we build and run on
AWSGoogle CloudDatabricksKubernetesLangChainTensorFlowPyTorchNVIDIA NeMoPineconeMLflowApache SparkApache Kafka
Why teams choose Welzin.
A senior pod accountable for the outcome, no juniors, no hand-offs.
Discovery to a measured result.
One senior pod, from the first metric conversation to a system in production you own.
Talk to a senior engineer- 01
Discover
A senior pod maps the metric, the data, and the constraints, then scopes the smallest build that moves the number.
- 02
Build
We ship to production from day one - real pipelines, evaluated agents, grounded GenAI - with you in the loop throughout.
- 03
Operate & measure
We run what we build, watch the metric we agreed to move, and hand over a system your team can own.
We build what we teach.
Products born out of client work - the upskilling program our engineers run, the founder toolkit we wished we had, the annotation studio behind our vision models, and the credit stack behind smarter lending.
What it’s like to work with Welzin
Senior pods only
A senior pod owns your metric end to end - the people who scope the work are the people who ship it. No juniors, no hand-offs.
In production from day one
The work is running and observable from the first sprint, not demoed at the end. You watch it move before you commit further.
Accountable to the number
We scope to the metric you need to move - revenue, risk, uptime, margin - then stay on the hook for it, in writing.
Insights
From insight to action.
Practical, opinionated writing on building AI and data systems that hold up in production, so your team can move faster and act with confidence.
Open Source
SODA Contexture: The Open Context Engine Supercharging AI Data Pipelines at Scale
In the rush to deploy AI agents across massive data landscapes, one silent killer lurks: missing context. AI models drown in raw metrics, CPU spikes, query...
8 min read
AI
Evaluate Your Large Language Model
Large Language Models (LLMs) like GPT-4, LLaMA, and Claude now power critical real-world applications - from customer support bots that might accidentally...
17 min read
Frontend Engineering
Supercharge Your Frontend with Lovable AI
In this article, we’ll guide you step by step to build your very first React project using Lovable AI, connect it to Supabase, and publish it online. By the...
9 min read
AI
How Context Length Optimization improves AI Performance
Like explaining a project to a friend, you give background not 200 pages of docs. AI models face the same challenge with context length.
7 min read
Web Engineering
How To Optimize the Performance of a Web App
A fast and smooth app keeps users happy, lowers bounce rates, and encourages people to come back. But if your app is slow, users quickly lose patience,...
7 min read
Frontend Engineering
A Beginner’s Introduction to React.js
React.js, commonly known as React, is an open-source JavaScript library developed by Facebook for building user interfaces, specifically for single-page...
7 min read
Agentic AI
LangChain vs LangGraph vs LangSmith
Large Language Models(LLMs) are changing how we create AI-powered applications. However, the actual impact depends on the frameworks we use to manage and...
7 min read
Cloud Native
Introduction to Cloud Native Artificial Intelligence (CNAI) Part-3
So here we are the grand finale of our three-part journey into Cloud Native AI (CNAI). We have explored what CNAI is and walked through how an AI project...
7 min read
Answers to questions about
What does Welzin actually do?
We are a full-stack AI & data firm across five disciplines: data science, predictive analytics, AI engineering (RAG, copilots, agents), MLOps/AIOps, and the product engineering that ships it all. One senior team owns the path from the first model to a system running in production - not slideware.
What kinds of problems do you take on?
Anything where data should be driving a decision and is not yet: forecasting, risk and fraud scoring, churn, document and workflow automation, copilots and agents, and the data platforms underneath them. If it touches a number you care about, it is in scope.
Connect with us
Do you have a specific AI or data challenge, interest in a career at Welzin, or just want to get in touch?
Talk to a senior engineer