Fixed price
AI Sprint
A fixed-scope build delivered to production in 1–3 weeks.
- An LLM feature inside an existing product
- An agent or a workflow automation
- A RAG system over your own documents
- Documented code and a handover your team can run
Fractional AI Tech Lead · Senior Full-Stack Engineer
Ship AI features and modernize legacy systems in weeks, not quarters.
I help product teams and agencies bring AI into production and move aging systems to modern stacks: architecture, hands-on development and technical leadership, delivered by one senior engineer using AI-assisted development.
A fractional AI tech lead is a senior engineer on a part-time engagement. You get the decisions and the code, without hiring a full-time AI lead.
- 25+ yearsbuilding and shipping software
- 2 yearsleading an AI product team
- 10x+faster delivery on recent projects
- 48 hoursto a written scope and price
The usual trade-off
Fast or done right. You shouldn't have to pick.
Most teams get one of two options. Neither holds up when real traffic, real money, and real deadlines arrive.
The fast, junior team
Quick demos, fragile foundations. The rewrite bill arrives right after launch.
The big agency
Solid, slow, and layered. Account managers, hand-offs, and a timeline measured in quarters.
Lynguru
Senior architecture with the speed of AI-assisted development, from one accountable engineer.
Services
Three ways to work together
Start with a fixed build, modernize a legacy system, or keep a senior technical lead on a monthly retainer. All three stay hands-on.
Fixed scope
Legacy Modernization
Move an aging system, for example a .NET Framework application, to modern .NET using AI-assisted development with senior review at every step.
- Assessment of the existing codebase and dependencies
- Replacement of unsupported libraries
- Structured rewrite and migration to a modern stack
- Documented code and a handover your team can maintain
Monthly retainer
Fractional AI Tech Lead
Senior technical leadership for teams that need direction and still want someone in the code. Limited slots.
- Architecture and technical direction
- Code reviews and delivery oversight
- Hiring support for AI and full-stack roles
- Guidance for your team, freelancers, or agency
Fit
When this is the right call
- You need a senior technical voice and you do not have a CTO.
- Your team is adding AI and nobody has shipped it in production yet.
- You won the AI work and need a senior engineer to deliver it under your brand.
- A prototype exists, and it needs to become something customers can use.
- You run an aging system (for example .NET Framework) with unsupported libraries and want it modernized without a year-long rewrite.
- You want a clear scope and a short timeline, not a quarter of research.
Work
Selected work
Anonymized examples of what gets shipped.
Legacy .NET Framework system, migrated to modern .NET
- Problem
- An aging .NET Framework application built on libraries that were no longer supported, hard to change and risky to keep running.
- What I built
- A structured migration and rewrite to modern .NET, using AI-assisted development (Claude Code, Cursor) with human review throughout, including replacing unsupported dependencies.
- Result
- Delivered more than 10x faster than the original development effort. Running in production.
Back-office system and dashboards
- Problem
- A business that needed internal tooling and operational visibility, and could not wait for a long development cycle.
- What I built
- A back-office application with dashboards, designed and delivered in a matter of days.
- Result
- Built more than 10x faster than a traditional build. Running in production.
Complex retail and web systems for new clients
- Problem
- Multi-channel retail logic and web platforms that had to launch fast without cutting corners.
- What I built
- New client systems covering complex retail workflows and web applications, built end to end.
- Result
- Delivered more than 10x faster than the original approach. Running in production.
About
One senior person, start to handover
I'm Rani Rimon, a full-stack engineer with more than 25 years of building and shipping software. For the last two years I led a team building AI-powered products, managing people while staying in the code.
You get one person who owns the outcome. I work fast, write things down, and care about the details.
- 25+ years full-stack
- 2 years leading an AI team
- Based in Israel, working with teams in Europe and beyond
Industries
Built for markets where downtime costs money
My core domains share one rule: when traffic spikes, the platform has to hold.
eCommerce
Storefronts that hold on your biggest sales day.
- Custom and headless storefronts
- Checkout, payments, and subscriptions
- Catalog, search, and inventory systems
- Fast front-ends built for conversion
Gaming
Real-time systems your players never notice.
- Game backends and live-ops tooling
- Real-time multiplayer services
- Player accounts, wallets, and in-game economies
- Admin dashboards and analytics
Betting
Platforms built for peak-match traffic.
- Sportsbook and casino platforms
- Odds feeds and bet-settlement engines
- Wallets, payments, and KYC integrations
- Back-office, risk, and reporting tools
Highly scalable applications
Outside these domains, the same engineering applies to any product that needs to grow without breaking.
- High-traffic APIs
- Event-driven architecture
- Real-time data
- Cloud infrastructure
- Performance audits
- Legacy modernization
Working to a deadline?
Tell me what you're building. Most projects can be scoped in a single call.
Process
How it works
A short, predictable path with no surprises on scope, price, or timeline.
-
Discovery call
20 minutes on the goal, constraints, and timeline. No cost, no pitch.
-
Clear proposal
A written scope, timeline, and fixed price within 48 hours.
-
Delivery
AI-assisted development with weekly demos and senior review on every change.
-
Handover
Clean, documented code in your repositories, and a team that can maintain it.
For agencies
Delivery you can put your name on
- You keep the client relationship.
- I work under your brand and your processes.
- Senior engineering, without a new hire.
Start a project
Tell me what you're building
Five fields, two minutes. I'll reply within one business day with next steps, or a written proposal within 48 hours if the scope is clear.
FAQ
Questions I usually get
How can you deliver this fast without cutting corners?
AI handles the repetitive work: scaffolding, boilerplate, test coverage, and integration code. My 25 years of experience go into the parts that matter: architecture, security, data design, and review. Every change is read and approved by me before it ships.
How do we work together if you're not in our time zone or office?
Async-first. We agree on overlap hours, share a channel for day-to-day questions, and meet once a week for a demo.
Do you sign an NDA?
Yes, before any detailed discussion.
How is pricing set?
Sprints and modernization projects are a fixed price, set after a written scope. Retainers are monthly, for an agreed number of hours. There's no price on this page; I send a written proposal within 48 hours of the discovery call.
Who owns the code?
You do. All work is delivered to your repositories, with documentation.
Which stack and models do you work with?
Full-stack (backend, frontend, cloud) and the major LLM providers. I choose based on your constraints, not my preference. I also migrate legacy .NET Framework applications to modern .NET.
Do you work with regulated betting and gaming operators?
Yes. I build with jurisdiction rules, KYC, responsible-gaming, and audit requirements in mind from day one, and I work alongside your compliance team rather than around it.
What if the project needs more than I can deliver alone?
I'll say so upfront. Then we scope the work to fit, or I help you hire.
Have an AI or modernization project in mind?
Book a call or send a WhatsApp message. I'll reply within one business day.