Upwork Tech Stack

Global work marketplace connecting businesses with independent talent and AI capabilities

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

Upwork operates a two-sided marketplace for contingent work, spanning 10,000+ skills across development, design, support, and operations. The tech stack reveals a hybrid architecture: legacy enterprise systems (Sitecore, Oracle, .NET/ASP.NET, SQL Server) paired with modern data tooling (Planful, Airtable, Monday.com) and emerging AI—they're now adopting REST APIs and Agentforce while grappling with Kubernetes optimization and technical debt. The hiring acceleration (70 roles in 30 days) is heavily weighted toward engineering (35) and data (26), suggesting a push toward platform reliability and AI-driven matching.

Tech Stack 132 technologies

Core StackAirtable Monday.com Jira SQL Server .NET C# Oracle ASP.NET Planful MCP SharePoint Adobe Analytics Google Search Console SEMrush Adobe Experience Manager Labelbox SQL HTML CSS Word Excel Drupal Drush Git Composer SQL Server Integration Services VB.NET Sitecore Azure Solr+98 more

AdoptingREST API Agentforce

What Upwork Is Building

◆Challenges

Improving system reliability
Reducing technical debt
Availability increase
Improving ai accuracy
Accurate transcription
Optimizing kubernetes infrastructure
Streamlining processes
Maintaining luxury quality standards
Optimizing host performance
Optimizing platform tool adoption

▲Active Projects

Seo strategy development
Fictional character recording for tts training
Crop type classification from satellite imagery
Staggered cohort rollout
Create and answer questions to train ai models
Evaluating ai-generated responses
Assessing factual accuracy
Building high-quality dataset for crop classification models
Ai llm evaluation project
Pricing elasticity framework development

Hiring Activity

Accelerating160 roles · 70 in 30d

Department

Engineering

Data

Ops

Support

Product

Research

Sales

Finance

Seniority

Mid

Senior

Junior

Lead

Manager

Director

Principal

Notable leadership hires: Market Lead, Research Director, Director of Engineering

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About Upwork

Upwork is a public marketplace that matches businesses—from one-person startups to Fortune 100 enterprises—with independent professionals globally. The platform spans 25+ hiring countries and hosts a community of independent contractors across website and app development, creative and design, customer support, finance, accounting, consulting, and operations. Operationally, Upwork serves a 501–1,000 person team from San Francisco; they are actively scaling engineering and data capabilities while addressing system reliability and technical debt challenges.

HeadquartersSan Francisco, California

Company Size501–1,000 employees

Founded2015

Hiring MarketsCanada, United States, Finland, Tanzania, Zambia, Kuwait, Philippines, Thailand

Frequently Asked Questions

What tech stack does Upwork use?

Core stack includes .NET, C#, ASP.NET, SQL Server, Oracle, and Azure for backend; Drupal, Sitecore, and Adobe Experience Manager for content; Git, Jira, and Composer for engineering workflows; and Planful, Airtable, and Monday.com for operations. They are adopting REST APIs and Agentforce.

Is Upwork hiring engineers?

Yes. Upwork has 35 active engineering roles across the organization, with 56 mid-level, 39 senior, and 35 junior openings in total. Hiring spans 25 countries including the US, Canada, UK, India, Philippines, and others.

What is Upwork working on?

Active projects include AI model training (fictional character TTS recording, Q&A generation, LLM evaluation), computer vision (crop classification from satellite imagery), pricing elasticity analysis, and cohort rollouts. They are also addressing system reliability, technical debt reduction, and Kubernetes infrastructure optimization.