Modernise legacy systems, or rescue a prototype that must reach production
Two common paths: (1) upgrade aging apps to modern architecture, cloud and safer releases, and (2) audit and harden stalled agency builds or AI-generated prototypes (Lovable, Replit, Bolt) into secure, tested production software.
Does this sound like your team?
“Legacy stack is too slow or risky to change”
“Your previous agency or freelancer disappeared”
“A Lovable, Replit or Bolt prototype works in demos but breaks with real users”
“Every release causes new bugs and nobody knows why”
What you get with Application Modernization
- Code and architecture audit
- Security and dependency review
- Stabilisation or migration plan with priorities
- Rebuild of fragile parts (auth, data, payments)
- Automated tests and CI/CD
- Hosting and monitoring setup
- Documentation and knowledge transfer
Prototype Rescue Checklist
20 things that break when a Lovable, Replit or Bolt app meets real users.
Phases, timelines and what you receive
Discover
Scope, user flows, architecture and written quote
Design & MVP
Designed and working first release
Launch
Production deploy, monitoring and handover docs
Improve
Support retainer, fixes and new features
What we measure before Go / Adjust / Stop
Every phase ends with a decision based on numbers agreed at the start.
Audit
written findings and a plan before any rebuild
Stability
error rates and failed releases go down
Security
critical issues closed first
Velocity
new features ship without breaking old ones
Get a plan for Application Modernization
A few fields, no sales script. We reply within 1 business day with next steps.
Senior people, named roles
Tech Lead
Owns architecture, code quality and delivery.
Full-stack / Mobile Engineers
Build the product end to end.
Product Designer
UX, UI and design system.
QA Engineer
Test plans, automation and release checks.
What we build with
Industries we deliver this for
Ways to work with us
Every project gets a written quote after a short scoping call.
Fixed-scope project
Clear scope and timeline. Scope agreed before code starts; change requests quoted separately.
Dedicated team / AI Pod
Evolving roadmap or AI systems in production. Monthly, scale up or down with notice.
Support & maintenance retainer
Live products that need fixes, updates, monitoring and small features each month.
Who this is not for, and what we won't do
- We don't recommend full rewrites unless the audit proves it is cheaper
- We don't start fixing before we understand the codebase
What clients say
“Working with the Bit & Bytes team on our CRM data automation project was an excellent experience. The team understood our requirements clearly, transformed complex email data into meaningful insights, and delivered a reliable backend solution that significantly improved our workflow.”
“Bit&Bytes Team quickly understood our goals on SEO assistant project and implemented complex machine learning features with precision. there communication were clear, delivery was timely, and the overall collaboration was smooth and efficient. We're very satisfied with the results and would definitely work with them again.”
“We collaborated with Bit&Bytes team on the development of YourList, our real estate and investment networking platform. From the very beginning, they demonstrated a deep understanding of both the technical stack and the business vision behind the product. They helped us shape the MVP, ensuring smooth integration between backend and frontend. Throughout the process, they were proactive, detail-oriented, and always committed to delivering on time. Working with them seamless and highly productive, they truly went above and beyond to make the project a success.”
Frequently asked questions
Straight answers on cost, timelines, ownership and data.
Rescues start with a code and architecture audit and a stabilisation plan. The rebuild is quoted from the audit findings.
Yes. We regularly harden prototypes from Lovable, Replit and Bolt. We keep what works and rebuild what doesn't.
Rarely. Most projects are stabilised piece by piece while still running.
No. Legacy upgrades and stalled custom builds are in scope; prototype rescue is one common path, not the only one.
Ready to talk about Application Modernization?
Book a short call with a senior engineer. No pitch deck, just a clear next step.
- We reply within 1 business day.
- NDA available on request
- You own all code from day one