TypeScript is JavaScript with types, checked by a compiler before the code runs.
Salesforce Select Partner · 15+ years of team experience · Delaware and Sydney
TypeScript development for large front ends, Node back ends and shared code.
We build TypeScript applications and libraries, move JavaScript codebases to TypeScript file by file, and get projects ready for the TypeScript 7 compiler.
See how it works
- 15+Years of team experience
- 3Ways to engage: project, team or extension
- 60 minFree TypeScript development review, with a written plan
- 5.0/5Client satisfaction (CSAT)
Proven Success With
5.0/5 CSAT
New to TypeScript development?
What is TypeScript development?
We build TypeScript front ends, Node back ends, shared SDKs and monorepos, and migrate JavaScript to TypeScript.
Work runs as a fixed-scope project, a dedicated team or TypeScript engineers who join your team.
Starting point
Where are you with TypeScript?
What does your TypeScript work look like today?
- Path 01Nothing built yet
A new TypeScript build
You need a new app, API or library and want types from day one.
- Started on TypeScript 7 with strict mode
- Shared types between front end and back end
- Tests and CI from the first sprint
- Path 02We inherited a codebase
Taking over an existing codebase
A large JavaScript or TypeScript codebase that the original team has left.
- Code, dependency and build review
- Type coverage measured and gaps listed
- A written report and a plan
- Path 03It needs modernizing
Upgrading or modernizing
Plain JavaScript, or TypeScript 5 with loose settings and many any types.
- JavaScript converted file by file
- Strict checks turned on in stages
- Build tools checked against TypeScript 7
A typed codebase where the compiler catches mistakes before your users do
What we do
What do our TypeScript development services include?
Build, migrate, upgrade and staff TypeScript work, front end and back end.
Full-stack TypeScript apps
01Front end and back end in one language, with types shared across both.
Node.js back ends and APIs
02Typed APIs with request checks in Zod or end-to-end types with tRPC.
Shared SDKs and libraries
03Typed client libraries your teams and partners install and trust.
Monorepos
04Nx or Turborepo set up so many apps share code and build quickly.
JavaScript to TypeScript migration
05Types added file by file while the app keeps shipping.
TypeScript 7 upgrades
06Deprecations cleared, strict mode on, and build tools checked for 7.0.
Salesforce integration
07TypeScript services that read and write Salesforce data over its APIs.
TypeScript team extension
08TypeScript engineers who join your team and work in your process.
Stack
The TypeScript stack we work with
TypeScript runs across the whole stack, so the tooling matters as much as the code.
- React
- Angular
- Vue.js
- Vite
- Node.js
- tRPC
- Zod
- tsc
- typescript-eslint
- esbuild
- SWC
- Nx
- Turborepo
- Vitest
Upgrades
What changes in TypeScript 7?
TypeScript 7.0 shipped in July 2026 with a native compiler written in Go. Options deprecated in 6.0 are errors in 7.0, and strict mode is on by default.
TodayJavaScript, or TypeScript 5 with loose settings
- TypeScript
Convert JavaScript
Add TypeScript file by file, starting with shared code and API boundaries.
Fits codebases where bugs come from wrong data shapes.
- TypeScript 6
Clear deprecations first
Upgrade to 6.0 and fix every deprecation warning before the move to 7.
Deprecations in 6.0 become errors in 7.0.
- TypeScript 7
Move to the native compiler
Switch to 7.0, turn on strict checks and confirm each build tool and linter supports it.
Some tooling still lags 7.0, so each tool is checked before the switch.
Engagement
How can you work with our TypeScript engineers?
Three ways to engage. Each one is agreed in a written proposal before work starts.
- Fixed-scope project
We deliver a defined build, migration or upgrade.
- SynconAI directs the work to agreed milestones
- Billed by milestone, as set out in the proposal
- Working code, types, tests and documentation
- Fits a migration, an SDK or a TypeScript 7 upgrade
- Dedicated team
A TypeScript team that works only on your product.
- You set priorities, our lead runs the team
- Billed monthly for the team
- Engineers, a lead and testing as needed
- Fits a product with work across front end and back end
- Team extension
TypeScript engineers who join your team.
- Your managers direct the day-to-day work
- Billed monthly for each engineer
- Vetted engineers, with employment and replacement handled by us
- Fits teams with a working process that need more hands
Process
How does a TypeScript engagement start?
Five steps from the first call to working code.
- Brief
- Call about your codebase and goals
- Repository access or a written scope
- Match or design
- Engineers matched to your stack
- Plan and proposal in writing
- Start
- NDA, access and local setup
- Codebase walkthrough and a first task
- Build and review
- Small pull requests with type checks in CI
- Code review and demos with your team
- Hand over or continue
- Documentation and a handover session
- Or a monthly plan for ongoing work
Cost and timing
What it costs and how long it takes
The review is free
A 60-minute architecture review of your TypeScript setup, with a written plan you keep.
A fixed-scope proposal first
Before any work starts you get a written proposal: a fixed-scope project with milestones, or a monthly plan. You approve it, or you do not.
Timing follows scope
How long it takes depends on what is in scope. The proposal states the milestones, so you see the timeline before you commit.
Client stories
Client work we have delivered
Real engagements, described by industry. Each story covers the starting position, what we built and how we delivered it, end to end.
Commercial & Business ServicesA Subscription Estimator and Technical Library for Fire Protection ProfessionalsA Next.js web application for a fire protection business: a searchable technical library and estimator with role-based access, manufacturer filtering, PDF output and subscriptions, with AI product identification in development.Next.js · Custom web application · Authentication and roles · SubscriptionsRead the story 
Communications, Media & TechnologyA Bilingual Knowledge Base That Answers Callers During a Major International EventA bilingual English and Japanese knowledge base for contact centre operators at a major international event: live answer suggestions, cross-language search with translated embeddings, operator content management and missing-question tracking.Custom AI · Vector search · Translated embeddings · Large language modelsRead the story 
EducationOne Tutoring Calendar Across Salesforce and TeachWorksSalesforce development for an Australian tutoring provider: a custom session calendar, two-way TeachWorks appointment sync, attendance and completion mapping, and session notes into after-session reports.Salesforce Platform · Lightning Web Components · Apex · TeachWorks APIRead the story Client reviews
What clients say about working with our architects
See how teams describe working with SynconAI, from first scope to production delivery.
Salesforce Select Partner30+ Salesforce certificationsDelivery from Delaware & Sydney, worldwide
Simply Outstanding
“SynconAI Consulting are Simply the Best in the Business When it comes to Salesforce implementation and AI-powered solutions, SynconAI are in a league of their own. Their expertise, dedication, and ability to deliver results that truly move the needle sets them apart from every other consulting partner we've worked with. What they achieved with our Sales Cloud, Service Cloud, and custom Agentforce agent has completely transformed how we operate streamlining our pipelines and our customer service, and automating tasks that used to consume hours of our team's time. They don't just implement technology they transform businesses. If you want the best, you work with their team.”
Sales CloudService CloudAgentforce
Jack BennettConsumer Goods & Retail · United States
“I had a very urgent deadline for our project reporting to be delivered and needed to build the module, dashboard and output reports in Salesforce. SynconAI were very responsive - they met with me online, responded to my emails quickly and took calls - whatever was needed to progress the work quickly. We are thrilled with the outcome and will continue to work with SynconAI in the future to continue to build our Salesforce capability and platform.”
Sales CloudService CloudNonprofit Cloud
Salesforce Managed ServicesAustraliaSalesforce Verified
“The team at SynconAI were fantastic, and promptly delivered on each project. They were able to guide us through every stage and made sure we were satisfied with the outcomes on multiple scopes of work.”
Sales CloudSlackFlowAgentforceMuleSoft
ManufacturingAustraliaSalesforce Verified
“They have been great and helping us transform out business by bringing what I conceptualize to life. Great at translating process/workflow needs into a solution. Been a pleasure work with and they're a critical part of our team and will be instrumental into bringing about my vision.”
Sales CloudFinancial Services CloudArchitectureAI
Financial ServicesUnited StatesSalesforce Verified
“Working with SynconAI was a seamless and highly professional experience from start to finish. They took the time to deeply understand our business processes before designing and implementing a Salesforce solution tailored specifically to our operational needs. The team demonstrated strong technical expertise across Salesforce configuration, automation, integrations, reporting, and user experience design.”
SalesforceExperience CloudCustom DevelopmentAutomationReporting
Salesforce ImplementationSalesforce Verified
Frequently asked questions
TypeScript development, answered.
Straight answers about TypeScript builds, migrations, engineers and how the work runs.
Building and supporting software in TypeScript. We build large front ends, Node.js back ends, shared SDKs, monorepos, serverless functions and CLI tools.
Yes, in steps. TypeScript 7.0 shipped in July 2026, and options deprecated in 6.0 are now errors. We clear deprecations on 6.0, then check your tools support 7.0.
As a fixed-scope project with milestones, a dedicated team, or engineers who join your team. Scope, people and billing are agreed in a written proposal before work starts.
Yes. They work in your repositories, standups and code review, and your managers direct the work. We handle their employment and any replacement.
Each engineer goes through a technical interview on TypeScript and your framework, a practical code task and a review with a SynconAI lead. You can interview them before they start.
Yes. jsforce, a community library for the Salesforce APIs, is written in TypeScript. We use it, or the REST API directly, from back ends and serverless functions.
Our hubs in Delaware and Sydney cover United States and Australian working hours, and we deliver remotely worldwide on your business hours. Overlap hours with your team are agreed before work starts.
TypeScript is a trademark of Microsoft Corporation. React is a trademark of the React Foundation. Angular is a trademark of Google LLC. Node.js is a trademark of the OpenJS Foundation. Salesforce is a trademark of Salesforce, Inc. Other names are trademarks of their owners. SynconAI is an independent consulting firm and is not affiliated with or endorsed by these organizations.
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