a.k.a. Leon · Rexli · Guru
Freelance developer specialised in R&D and AI development. I research hard problems, prototype fast and ship production software — plus the web, mobile, cloud, security and growth work around it.
I build AI agents
Most of my work starts where off-the-shelf software stops — an idea nobody has built yet, or a process that needs to think. That is where R&D and AI meet.
From “is this even possible?” to a working proof-of-concept you can demo, test and fund.
Practical AI that does real work inside your business — in the cloud or fully on your own servers.
Pick one service or hand over the whole product — design, build, launch and growth stay in the same hands.
All services in detail →Agents, chatbots, RAG, recommendation, forecasting, vision and speech models.
Learn more →Proof-of-concepts, MVPs, feasibility research and technical reports.
Learn more →Fast, secure, SEO-ready websites and web apps — from landing pages to portals.
Learn more →Android, iOS and cross-platform apps with Flutter or React Native, Play Store ready.
Learn more →Multi-tenant platforms, dashboards, subscriptions, roles and billing.
Learn more →Online stores, marketplaces, UPI / Razorpay / Stripe and custom payment gateways.
Learn more →Windows / Linux apps, utilities, drivers-level tools, Electron and .NET software.
2D/3D games in Unity, Unreal and Godot, plus HTML5 / WebGL browser games.
Learn more →Penetration testing, secure code review, hardening and malware analysis.
Learn more →AWS, Google Cloud, Azure, VPS, Docker, CI/CD, domains, SSL and monitoring.
Learn more →REST / GraphQL APIs, ERP, CRM, WhatsApp, SMS, maps and third-party integrations.
Telegram & WhatsApp bots, n8n workflows, scrapers and browser automation.
Learn more →MT4/MT5 integrations, trading CRMs, wallets, dashboards and payment flows.
Smart contracts, tokens, crypto wallets and blockchain integrations (EVM, TRON).
Technical SEO, Core Web Vitals, schema, local SEO, content and link strategy.
Learn more →Instagram, Facebook, YouTube & LinkedIn growth, content calendars and paid ads.
Learn more →Figma prototypes, design systems, logos and brand kits that convert.
Bug fixes, upgrades, security patches, backups and monthly care plans.
The right tool for each job — not one framework forced onto every problem.
Sample prototype screens for every service line. Client projects stay confidential — ask on WhatsApp for a live demo in your category.
Chat with invoices, PDFs and databases on a local GPU.
Ensemble models, heatmaps and forensic signals.
Experiment tracking from baseline to fine-tuned model.
MRR, churn, plans and API usage at a glance.
Catalogue, offers, UPI / COD checkout and returns.
Android & iOS from one codebase.
Unity / Unreal / Godot, desktop, mobile and WebGL.
Core Web Vitals, rankings and organic growth.
Content calendar, ads and engagement tracking.
Live alerts, vulnerability tracking and pentest results.
A WhatsApp chat or call to understand the goal, users, budget and deadline. You get a written scope.
Risky parts are tested first. A clickable prototype or proof-of-concept before the full build.
Milestones with regular demos, clean code, security checks and documentation.
Deployment, SEO, social media and ongoing support so the product keeps improving.
Fixed scope, fixed price, milestone payments. Best for websites, apps and well-defined products.
A short research cycle that ends with a working proof-of-concept and a clear go / no-go report.
Dedicated hours every month for features, maintenance, SEO and marketing.
Anything else? Ask directly on WhatsApp — replies are personal, not a bot.
Yes. I work remotely with clients in India and abroad, over WhatsApp, email and video calls, and adjust meeting times to your time zone.
Yes. Besides cloud models such as OpenAI, Claude and Gemini, I deploy open models like Llama, Mistral and Whisper on your own GPU server or VPS so your data never leaves your infrastructure.
We start with a short research sprint: I study the problem, test approaches and deliver a working proof-of-concept with a written report of what works, what does not and what it will cost to build fully.
Yes, I sign NDAs. Code ownership and IP terms are written into the agreement before work starts.
Yes. I can take a product from build to growth: technical SEO, content, social media calendars, paid ads and monthly reports.
Send a WhatsApp message to +91 82990 75171 or email info@sonuojha.in with a short description of your idea. You will get questions, a plan and a quote.
The fastest way to reach me is WhatsApp. Share what you have in mind — a rough idea is enough to start.
