Company profile

Upwork Tech Stack

Global work marketplace connecting businesses with independent talent

Software Development San Francisco, California 501–1,000 employees Founded 2015 Public Company

Upwork runs a global talent marketplace, and its job posts show two distinct tracks: an internal Salesforce-centric stack (Service Cloud, Apex, Lightning Web Components, Copado, now adding MuleSoft) and a React/Next.js/TypeScript web front end. Much of the accelerating, engineering- and ops-heavy hiring targets AI training work such as speech data, TTS recordings and generative AI code evaluation, plus managed-services programs for hospitality clients.

Tech Stack 200 technologies

Core StackApex Salesforce Python JavaScript Go Java Node.js React Next.js Contentful Strapi GraphQL gRPC Jest Playwright TypeScript Salesforce Service Cloud Lightning Web Components SOQL Visualforce Copado Lua Roblox Studio Roblox Salesforce Sales Cloud Lightning Contentstack React Testing Library ESLint Prettier+170 more

AdoptingMuleSoft React

What Upwork Is BuildingChallenges and projects from their job posts

◆Challenges

Improving AI training data quality and reliability
Improving speech recognition models
Integration failures and platform reliability issues
Ensuring code quality for AI models
Fluctuating assignment volume

▲Active Projects

Airbnb Luxe managed services and home consultant program
AI code evaluation for generative AI
Audio transcription and TTS training recordings
Home assessment and property evaluation reports
Vulnerability testing and detection

Hiring Activity

Accelerating95 roles · 60 in 30d

Department

Engineering

Ops

Support

Data

Research

Marketing

Creative

Seniority

Mid

Senior

Junior

Companies like Upwork

400+ Software Development companies running Apex and Lightning Web Components

See the full list

About Upwork

Upwork operates a work marketplace that matches businesses with independent professionals and agencies worldwide. Its customers range from solo-founder startups to very large enterprises, and its talent pool spans development, design, customer support, finance, consulting and operations. The company is publicly traded, headquartered in San Francisco, California, and has 501–1,000 employees. Hiring spans the Philippines, Malaysia, Mexico, Vietnam, India, Romania, the United States and several other countries.

HeadquartersSan Francisco, California

Company Size501–1,000 employees

Founded2015

Hiring MarketsPhilippines, Malaysia, Mexico, Vietnam, India, Romania, United States, Peru

Frequently Asked Questions

What tech stack does Upwork use?

Upwork's stack includes Salesforce Service Cloud and Sales Cloud, Apex, Lightning Web Components, Copado, Python, Go, Java, Node.js, React, Next.js, TypeScript, GraphQL and gRPC, with MuleSoft being adopted.

What countries does Upwork hire in?

Upwork hires across the Philippines, Malaysia, Mexico, Vietnam, India, Romania, the United States, Peru, Australia, Indonesia, the UK, Canada, Poland, Israel, Portugal and Costa Rica.

What is Upwork working on?

Current work includes AI training data projects, speech transcription and TTS audio collection, generative AI code evaluation, vulnerability testing, and a managed home consultant and assessment program.

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How this profile is built

Upwork's technology stack, projects, and hiring signals are inferred from public hiring and company data — career pages, public listings, and company web presence — then clustered and de-duplicated. Figures are estimates that refresh over time. Read our full methodology →

This is not an official vendor or customer list. It is a technology-adoption signal inferred from public data, intended for B2B research.