Hire TypeScript developers for your existing JavaScript codebase
Static type checking added to the code you already have, without a rewrite
TypeScript is JavaScript with static type checking. Developers define the expected shape of each value, such as a price, a name or a date. The build fails when the code does not match, so errors surface in development, not in front of customers. Infoloop places a TypeScript developer in your team within 1 to 2 weeks to introduce these checks into your existing code.
- Experienced TypeScript engineers, onboarded in 1 to 2 weeks
- An interview with each developer before they start
- Work in your codebase, your conventions and your daily stand-up
- Scope, delivery dates and price agreed in writing first
People you can also hire
Type errors caught at build time, not in production. Scope, budget and timeline agreed in writing first.
What engineering teams get from an Infoloop TypeScript developer
Fewer defects reach your customers, and pricing is agreed in writing first.
Two offices, one delivery team
Our TypeScript developers work from the head office in Surat, India. The Dover, Delaware office serves US clients.
Types that document the business
The type definitions describe your business rules, not only what the compiler requires. A developer who opens the file next year can understand how it works.
Pricing agreed before work starts
You approve the rate and an estimate in writing before development begins. A clearly scoped migration can have a fixed price. Changing work is billed hourly against the estimate.
Your codebase, your standards
We follow your team's conventions, not our own. One of your developers approves every change before it merges.
End-to-end type safety
The same developer can trace one data field from the database, through the API, to the interface. Infoloop also delivers content management systems, online stores and AI assistants.
Hiring process
From first call to a type-safe codebase
Four steps from an introductory call to a developer contributing to your codebase.
01Short diagnostic call
You describe the codebase and the recurring defects. We confirm whether TypeScript is the right remedy. If the root cause is elsewhere, we tell you. The call is free.
02Written scope and pricing
We document what gets type-checked, what does not and the acceptance criteria for completion. You approve the rate and an estimate, or a fixed price for a clear scope. Any later addition is quoted in writing before development starts.
03Small, reviewed pull requests
You interview every developer first. Work arrives in small pull requests that your own developers review and approve. Nothing merges without your team's approval.
04Handover or monthly support
Your developers receive written documentation and a recorded walkthrough. Then your team takes ownership, or the code moves to monthly support.
TypeScript frameworks and runtimes we cover
| Frontend |
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| Backend and APIs |
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| Mobile |
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| eCommerce |
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Engagement models for TypeScript work
Three ways to engage a TypeScript developer, each agreed in writing before work begins.
- Scope the migration
Fixed-scope migration
- Fixed price
- End date
One defined deliverable, such as typing the files that fail most often or sharing types between the front end and the back end. Priced and scheduled in writing, then handed over or moved to monthly support.
- Interview an engineer
Dedicated TypeScript developer
- Hourly or monthly
- 1 to 2 weeks to start
A dedicated TypeScript developer joins your team for an agreed term, billed hourly or monthly. They work in your codebase and your backlog. You interview them first. After the initial term, the contract continues month to month.
- Discuss hourly work
Hourly work for changing scope
- Time and materials
Hourly billing suits typing work whose scope will change, such as gradual migration, ongoing improvements and support. The rate and an estimate are agreed in writing first. Support covers monitoring, fixes within an agreed response time, strict type checks and a monthly report.
What our clients say
They shipped our support agent in five weeks and it has run ever since. Response time dropped from hours to two minutes.
COO, fintech scale-up
Read the case studyRelated work
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Fintech
AI support assistant for a fintech scale-up
- View case study: Nine garage branches on one scheduling platform
Automotive
Nine garage branches on one scheduling platform
- View case study: Multi-plant ERP for a machinery manufacturer
Manufacturing
Multi-plant ERP for a machinery manufacturer
Book a TypeScript scoping call
Describe the recurring defects and who maintains the code today. A named person replies within one business day.
FAQs
What CTOs ask before hiring TypeScript developers
Direct answers. Raise anything else on the scoping call.
What is TypeScript, and why add it to existing code?
TypeScript is JavaScript with static type checking. Developers define the expected shape of each value, and the build fails when code breaks that definition. Adding it to existing code catches defects before release and makes the codebase easier for new developers to understand.
What does a TypeScript developer cost?
Infoloop does not publish rates. The rate and an estimate are agreed in writing after a short call. A fixed-scope migration has one fixed price and delivery dates. A dedicated developer is billed hourly or monthly. Any later addition is quoted separately. Post-launch support is agreed and billed separately.
Can one developer convert our codebase to TypeScript gradually?
Yes. TypeScript is designed for incremental adoption, one file at a time. Old and new files coexist in the same project, and the build continues to pass throughout. We start with the files that fail most often and agree the target strictness level up front.
Can your developer work inside our team?
Yes, that is the standard arrangement. The developer works in your codebase, follows your branching and review rules and joins the meetings you choose. Your own developers approve each change. Alternatively, we deliver one separate component and hand it over complete.
What happens when the work is complete?
You decide. Your team takes over with documentation and a walkthrough. Or the code moves to monthly support. It covers monitoring, fixes within agreed response times, security updates, strict type checks as the codebase grows and a monthly report.
Who owns the code if we stop working with you?
You do, from the first day. The work lives in your repository, on your hosting, under your accounts. There is no license fee to keep paying. If you end monthly support, you retain the code, the documentation and the automated checks.
Describe the defects reaching production
In half an hour, we assess whether TypeScript is the right remedy. You receive the scope, delivery dates and a price or estimate in writing.
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Roles that work alongside TypeScript developers
Client ratings
Rated 4.9
Rated 4.8
Rated 4.7
Rated 4.7