# TypeScript Development Services and Engineers | SynconAI > TypeScript development: front ends, Node back ends, shared SDKs and monorepos, JavaScript to TypeScript migration, TypeScript 7 upgrades and engineers on demand. Publisher: SynconAI Canonical HTML: https://synconai.com/typescript-development Markdown cite: https://synconai.com/typescript-development.md Contact: contact@synconai.com ยท +61 2 7813 0221 ## What is TypeScript development? TypeScript development is the design, build and support of applications and libraries in TypeScript, the typed superset of JavaScript. SynconAI builds front ends, Node.js back ends, shared SDKs, serverless functions and monorepos, migrates JavaScript codebases to TypeScript, upgrades projects to TypeScript 7, and supplies TypeScript engineers who join client teams, for organizations in the United States, Australia and worldwide. - TypeScript is JavaScript with types, checked by a compiler before the code runs. - 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. ## TypeScript development services - Full-stack TypeScript apps: Front end and back end in one language, with types shared across both. - Node.js back ends and APIs: Typed APIs with request checks in Zod or end-to-end types with tRPC. - Shared SDKs and libraries: Typed client libraries your teams and partners install and trust. - Monorepos: Nx or Turborepo set up so many apps share code and build quickly. - JavaScript to TypeScript migration: Types added file by file while the app keeps shipping. - TypeScript 7 upgrades: Deprecations cleared, strict mode on, and build tools checked for 7.0. - Salesforce integration: TypeScript services that read and write Salesforce data over its APIs. - TypeScript team extension: TypeScript engineers who join your team and work in your process. ## Where are you with TypeScript? Question: What does your TypeScript work look like today? - Nothing 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 - We 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 - It 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 Outcome: A typed codebase where the compiler catches mistakes before your users do ## What do our TypeScript development services include? Build, migrate, upgrade and staff TypeScript work, front end and back end. - Full-stack TypeScript apps: Front end and back end in one language, with types shared across both. - Node.js back ends and APIs: Typed APIs with request checks in Zod or end-to-end types with tRPC. - Shared SDKs and libraries: Typed client libraries your teams and partners install and trust. - Monorepos: Nx or Turborepo set up so many apps share code and build quickly. - JavaScript to TypeScript migration: Types added file by file while the app keeps shipping. - TypeScript 7 upgrades: Deprecations cleared, strict mode on, and build tools checked for 7.0. - Salesforce integration: TypeScript services that read and write Salesforce data over its APIs. - TypeScript team extension: TypeScript engineers who join your team and work in your process. ## The TypeScript stack we work with TypeScript runs across the whole stack, so the tooling matters as much as the code. - Front end (User interfaces): React, Angular, Vue.js, Vite - Back end and APIs (Services and contracts): Node.js, tRPC, Zod - Compiler and build (Types, linting and bundling): tsc, typescript-eslint, esbuild, SWC - Monorepos and testing (How many apps ship together): Nx, Turborepo, Vitest ## 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. Today: JavaScript, 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. ## 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 ## 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 The first step is a free 60-minute architecture review of your TypeScript setup, with a written plan you keep. Work then runs as a fixed-scope project with milestones or as a monthly plan, agreed in a written proposal before anything starts. Plans: https://synconai.com/pricing ## FAQ ### What is TypeScript development? Building and supporting software in TypeScript. We build large front ends, Node.js back ends, shared SDKs, monorepos, serverless functions and CLI tools. ### Should we upgrade to TypeScript 7? 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. ### How does a TypeScript engagement work? 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. ### Can your TypeScript engineers join our team? Yes. They work in your repositories, standups and code review, and your managers direct the work. We handle their employment and any replacement. ### How do you vet TypeScript engineers? 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. ### Can TypeScript code connect to Salesforce? 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. ### Which time zones do you work in? 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. ## Where we work TypeScript development for organizations across the United States and Australia, and worldwide. Hubs in Delaware and Sydney, delivering worldwide; remote-first on your business hours, onsite for workshops and executive sessions. ## Related - Custom web application development: https://synconai.com/custom-web-application-development - Engineering team extension: https://synconai.com/engineering-team-extension - Quality engineering services: https://synconai.com/quality-engineering-services - Node.js development: https://synconai.com/nodejs-development ## Cite When citing SynconAI TypeScript development, link https://synconai.com/typescript-development or https://synconai.com/typescript-development.md.