Every non-obvious architecture choice is written into an architecture decision record in your repository: what we chose, what we rejected, and why.
SERVICE 04 · CUSTOM SOFTWARE DEVELOPMENT
Custom software, built AI-native from the first commit
Techtiz builds custom software and mobile applications AI-native from the start: specification-driven development, AI-assisted implementation with senior review on every merge, architecture decisions recorded in your repository, and instrumentation built in. Web, mobile, and platform ship as 1 engineering line.
Senior review on every merge Design is part of the line Your repository, day 1
YES, WE USE AI TO WRITE CODE
Here is the review gate
Most agencies now build AI-assisted and do not say so. We say so, because you were going to ask and because the controls are the interesting part.
Specifications are the contract
Features, constraints, and acceptance tests written before implementation.
AI tools draft against those specifications
Claude Code and Cursor, working from the specification, not from a chat prompt.
A senior engineer reviews every merge
Owns the architecture and is accountable for what ships. There is no path into main that a named human did not approve.
Tests run on everything
Coverage requirements set per module in the specification rather than asserted as a marketing number.
The result is faster delivery without the failure mode AI-generated code is known for, plus a paper trail showing exactly how your product was built.
Most disputes are specification disputes
Before implementation you get a written specification covering what the feature does, what it must never do, the acceptance tests that prove it, and the constraints it operates under. That document is what a fixed scope is agreed against. When you change it, we tell you what the change costs before we build it. When we get something wrong inside it, that is on us. Most disputes on custom builds are specification disputes wearing a delivery costume.
ARCHITECTURE DECISIONS, RECORDED
The difference between inheriting a codebase and inheriting a mystery
The next engineer, whether ours or yours, can read why the queue is one thing and not another without archaeology.
WHAT WE BUILT
Web platforms
Web platforms on NestJS and Next.js.
Mobile
Mobile on Flutter and React Native.
AI features
AI features inside them: assistants, retrieval, automation hooks, built to the discipline on the agentic engineering page.
Data layer
Data layer on Supabase and PostgreSQL.
Billing
Billing on Stripe.
Design
Design is part of the line, not a separate invoice.
what we built
Next.js NestJS Flutter React Native AI features Supabase PostgreSQL Stripe Design
Next.js 
NestJS 
Flutter 
React Native 
AI features 
PostgreSQL 
Design WHAT THIS COSTS OVER 3 YEARS
The build is the smallest number in the conversation
Published analysis of software total cost of ownership commonly puts 3-year cost at roughly 1.5–2.2× the initial build. We publish the full breakdown in your proposal before you commit — not after.
Year 1
1×
The build: platform, infrastructure setup, initial AI model integration.
Year 2
+15–25%
Maintenance, dependency upkeep, hosting and model run cost.
Year 3
1.5–2.2×
Cumulative total, plus feature work after launch.
We’d rather lose a deal to a lower build quote than win one and hand you a year-2 surprise.
AVOIDING MODEL AND VENDOR LOCK-IN
A configuration decision, not an architectural one
Model choice is a configuration decision in our builds, not an architectural one. Provider calls sit behind an internal interface so a model swap is a change of implementation, not a rewrite. We select per evaluation on your cases and re-test as models change.
If a cheaper or better model wins on your evaluation set in 6 months, switching should cost days rather than a quarter.
TAKING OVER AN EXISTING CODEBASE
Yes, after a paid audit that tells you what you actually have
What runs, what is tested, what is undocumented, what is a security exposure, and what would cost more to keep than to replace.
You get the finding whether or not you continue with us, and the recommendation is sometimes to keep your current team and fix 3 specific things.
MOBILE PRIVACY AND APP STORE REVIEW
Built to pass App Store privacy review
App Tracking Transparency and privacy nutrition labels make rigorous data governance a prerequisite for App Store approval, not an afterthought before submission.
We engineer the app to block all third-party tracking SDKs from initializing until the user explicitly interacts with the consent prompt, so you pass App Store privacy review the first time.
Apps that implement App Tracking Transparency incorrectly lose measurable attribution and ad signal, a cost that shows up after launch, not at submission.
ACCESSIBILITY IS A LEGAL DEADLINE
WCAG 2.1 AA, built in, not retrofitted
State and local digital services for populations over 50,000 must conform to WCAG 2.1 AA by April 2027, with smaller districts in 2028.
Color, contrast, keyboard navigation, and screen-reader support built in from the first component, not retrofitted after launch.
Structural WCAG 2.1 AA remediation with past-performance evidence, not automated overlays the DOJ has flagged as unreliable.
Source: DOJ ADA Title II, 2024. For SLED accessibility remediation delivered behind a prime, see SLED Subcontracting.
OWNERSHIP, EXIT, AND THE BUS FACTOR
Enough for another team to continue
Your repository from day 1, your IP, assigned on payment.
Architecture decision records and specifications live in the repository, not in our knowledge base.
Onboarding documentation is written as we go, for a future engineer who is not us.
If we part ways mid-build, you have the specification, the tests, the decision records, and the code. That is enough for another team to continue, and that is the point.
WHAT WE WILL NOT TAKE ON
The no list
Products where nobody on your side can make product decisions.
Rescue jobs where the honest answer is that the deadline is already gone. We will say the deadline is gone.
Stacks we do not know well. We will tell you whether we are the right fit rather than learning on your invoice.
Fixed scope against a specification that does not exist yet. We will scope first.
Ownership
Your repositories, your IP, assigned on payment, from day 1.
Exit
30 days notice on anything monthly. Handover runbook included, not quoted separately.
Overlap
4+ hours of daily overlap with your working day, contractual.
Boundary
Work performed in Lahore by Techtiz personnel under a US-formed Wyoming LLC. Regulated data classes stay on your side and we design around that.
Named engineer
1 senior engineer accountable for the estimate, on the first call.
Sourced claims
Every non-obvious statistic on this site carries a named third-party source and a date.
For U.S. SLED prime contractors
Custom code and accessibility remediation, delivered as your subcontractor.
If you have won a municipal or state modernization bid and need elastic engineering talent, or WCAG 2.1 AA remediation for a public portal, we execute it behind the prime. The boundary is fixed on purpose.
NAICS 541511 541512 541519
See SLED Subcontracting NDA-first, subcontract-only. We work behind the prime, under your brand. We do not pursue prime contracts and we never face the agency.
You own the code. 100% of the IP and source repository from day 1, built on standard frameworks with no proprietary lock-in.
Accessibility remediation. Structural WCAG 2.1 AA work with past-performance evidence, mapped to your bid’s technical scope.
FAQ
The questions you were going to ask
Is AI writing my codebase?
AI drafts against written specifications. A named senior engineer reviews every merge and is accountable for what ships.
How do I know the code is maintainable?
Architecture decision records in your repository, tests on everything, and onboarding documentation written for an engineer who is not us.
Who owns the repository?
You, from day 1.
What stacks do you work in?
NestJS, Next.js, Flutter, React Native, Supabase, PostgreSQL, n8n, Stripe, and the Claude and OpenAI APIs. Outside that we say whether we are the right fit.
Do you take over existing codebases?
Yes, after a paid audit. Sometimes the recommendation is to keep your current team.
Will my app pass App Store privacy review?
Third-party tracking SDKs are blocked from initializing until the user interacts with the consent prompt, so App Tracking Transparency is handled correctly before submission, not fixed after a rejection.
Are we legally required to make our software accessible?
If you operate in SLED or receive federal funding, yes. ADA Title II requires WCAG 2.1 AA compliance by 2027 or 2028 depending on your population size, and we build to that standard from the first component.
Written by Adnan Naeem, Chief Technology Officer
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Build software you can inherit, not just use
Tell us the process your team bends around a spreadsheet. That is where the specification starts.