15 Best TypeScript Web Development Companies in San Francisco, USA (2026)

Gilzor handles full-cycle web development, covering architecture, frontend engineering, quality assurance, deployment, and post-launch support. TypeScript appears in both its frontend and backend technology stacks. The team combines it with React, Next.js, Node.js, NestJS, Express, TypeORM, and Sequelize.

This range makes Gilzor suitable for businesses building TypeScript applications across more than one layer of the stack. The company can also step into existing products that need performance work, architectural changes, bug fixes, or continued feature development. Its broader capabilities include mobile apps, UI/UX design, R&D, and AI or machine learning integration.

Azumo develops custom web applications and provides software teams for companies that need ongoing engineering capacity. Its model combines a San Francisco headquarters with nearshore developers working in compatible US time zones.

The company is particularly suited to TypeScript projects that sit alongside AI, data engineering, or cloud infrastructure. Clients can engage a single developer, form a dedicated team, or assign Azumo responsibility for a full product build. Web, mobile, enterprise software, and AI applications all fall within its delivery scope.

GeekyAnts works on web platforms, mobile products, SaaS applications, and enterprise modernization. Its engineering background is closely connected to the React and React Native ecosystems, including work on open-source tools such as NativeBase and gluestack-ui.

For TypeScript projects, this experience is useful when one codebase must support web interfaces, component systems, backend services, or cross-platform applications. The company offers product engineering as well as dedicated development support. It also maintains a physical San Francisco office, making it a practical option for local companies that want a vendor with both US and international delivery operations.

Vention supplies software engineers and multidisciplinary product teams to startups and established companies. Its technology coverage includes TypeScript, JavaScript, React, Angular, Node.js, cloud platforms, databases, and mobile development frameworks.

The company is a reasonable fit for larger TypeScript programs where the buyer needs more than frontend implementation. Teams can support interface development, backend services, API integrations, cloud infrastructure, and quality assurance within one engagement. Vention also works with businesses that need to expand an internal engineering group without handing over the entire product.

BairesDev provides distributed software development teams across the Americas. TypeScript is available within its technology-specific hiring and development services, while its wider capabilities cover React, Angular, Node.js, cloud engineering, quality assurance, data, and mobile applications.

The company can support a dedicated TypeScript project or supply individual engineers to an existing team. This flexibility may suit San Francisco businesses with established product leadership but limited hiring capacity. BairesDev also handles complete outsourced development for companies that prefer one partner to manage design, engineering, testing, and deployment.

Simform develops digital products and helps businesses modernize existing software systems. Its engineering services cover web applications, cloud-native systems, APIs, DevOps, data platforms, and quality engineering.

TypeScript teams can work across React or Angular interfaces and Node.js backend services rather than treating the language as a frontend-only tool. Simform is therefore more appropriate for products with several connected components, integrations, or significant cloud requirements. The company also provides dedicated engineering teams for organizations that want continuing delivery support after an initial release.

ArcTouch designs and builds digital products for consumer and enterprise audiences. Although it is widely associated with mobile applications, its work also covers websites, connected products, backend systems, and product strategy.

TypeScript can be used within the company’s React, React Native, and web engineering work, making ArcTouch a useful option when a project crosses web and mobile channels. The team can participate from product definition and UX design through engineering, testing, and release. Its San Francisco base also gives local companies access to a product studio with experience in customer-facing applications.

Cheesecake Labs develops web and mobile products for startups and established businesses. Its engineering teams work with React, React Native, Node.js, TypeScript, cloud infrastructure, and product design.

The company is particularly relevant to projects that need a shared technical approach across browser-based and mobile applications. It can handle product discovery, interface design, engineering, testing, and continued development after launch. Cheesecake Labs has a presence in San Francisco and an engineering operation in Brazil, giving clients a combination of US-based coordination and nearshore delivery.

Diffco works with startups and growth-stage companies on web platforms, mobile applications, and AI-enabled software. Its development capabilities include TypeScript, React, Next.js, Node.js, databases, cloud platforms, and mobile technologies.

This mix is useful for companies that need a TypeScript team to manage both the visible application and the services operating behind it. Diffco can begin with product discovery and continue through UX design, software engineering, testing, and maintenance. Its San Francisco presence also makes the company relevant to local founders seeking a product-oriented development partner.

Yellow builds web applications, mobile products, AI systems, and business software. The company works with TypeScript within modern frontend and backend stacks, including React, Angular, Next.js, and Node.js.

Its service range fits projects that combine application engineering with machine learning, data processing, or third-party integrations. Yellow can also provide product discovery, interface design, architecture planning, and post-release support. For San Francisco businesses, the company offers access to a distributed development team while maintaining a local market presence.

Zazz develops web platforms, mobile applications, and custom business software. Its engineers work with modern JavaScript frameworks and TypeScript-based development environments for both customer-facing and internal products.

The company’s broader capabilities cover product strategy, UI/UX design, backend engineering, testing, cloud deployment, and application maintenance. That makes it suitable for clients that need an entire delivery team rather than a TypeScript contractor working in isolation. Zazz maintains a San Francisco presence and works with organizations in several regulated and consumer-facing sectors.

Dayspring Partners provides web application development and custom software development for organizations across the San Francisco Bay Area and Silicon Valley. TypeScript appears in its technology stack alongside JavaScript, React-related tools, Node.js, and other web development technologies.
The company works on data-intensive applications, business tools, new products, e-commerce platforms, and custom web applications. Its combination of software development and web design allows clients to work with one team across application engineering, interface development, and ongoing product improvements.

Appstem is a San Francisco digital product agency that develops web applications, mobile apps, and connected experiences. Its work combines product planning, interface design, frontend development, backend engineering, analytics, and quality assurance.

For TypeScript projects, Appstem is most relevant when the web application forms part of a wider customer experience that may also involve mobile devices or integrated services. The agency can support the full product cycle instead of limiting its role to implementation. This structure can help businesses that have an initial idea but still need technical scoping and UX decisions before development begins.

Povio designs and develops digital products for startups and established companies. Its engineering services cover frontend development, backend development, web development, mobile applications, DevOps, quality assurance, and product delivery.
For TypeScript projects, Povio works with modern React and JavaScript ecosystems. The company specifically discusses TypeScript as an integral part of modern React web development and covers TypeScript support in tools such as TanStack Router. Its broader engineering capabilities allow teams to combine frontend development with backend services, testing, and product design.

Toptal connects businesses with independent software developers, designers, product managers, and other specialists. Companies can use its network to find engineers with TypeScript, React, Angular, Node.js, Next.js, or full-stack experience.

This is a different model from hiring a conventional development agency. The client generally retains more responsibility for product leadership, technical direction, and day-to-day work management. It can still be a practical option for San Francisco companies that already have an engineering team and need one or more TypeScript specialists for a defined period.