Grant Street Group Tech Stack

Government cloud platform for tax collection, payments, and financial auctions

Software Development Pittsburgh, PA 201–500 employees Founded 1997 Privately Held

Grant Street Group operates mission-critical infrastructure for government tax collection, e-payments, and auctions—processing $20B+ annually in transactions and $13T+ in auctioned instruments. The tech stack (JavaScript, React, TypeScript, Python, Java, PostgreSQL, Exasol, RabbitMQ, Apache NiFi, Tableau) reflects a mature, polyglot backend designed for high-volume, regulated workloads. Active projects around taxsys migration, data reverse-engineering, and legal operations suggest the company is simultaneously scaling customer onboarding while addressing technical debt in legacy tax systems and formalizing internal process frameworks.

Tech Stack 46 technologies

Core StackJavaScript Vue React Jest Playwright TypeScript Webpack Vite Stripe Python Java C++ C# Ruby Go MySQL PostgreSQL jQuery Linux RabbitMQ Apache NiFi Tableau OpenAPI Windsurf Perl Ajax Git Ubuntu Exasol SQL+16 more

What Grant Street Group Is Building

◆Challenges

Reducing incident frequency
Reducing incident duration
Reducing incident impact
Complex multi-year implementations
Bad customer data
Legacy tax data conversion
Scaling legal function
Real-time legal challenges
Data protection compliance
Inadequate data-driven decision making

▲Active Projects

Embeddable ui widgets
Taxsys implementation for a large county government
Migrate clients to taxsys
Reverse-engineer legacy tax data
Contracting playbooks development
Contract lifecycle management implementation
Legal operations efficiency improvement
Scalable analytics dashboards
Predictive forecasting models
Pipeline health views

Hiring Activity

Accelerating15 roles · 6 in 30d

Department

Engineering

Data

Ops

Support

Design

Legal

Seniority

Mid

Junior

Senior

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About Grant Street Group

Grant Street Group builds cloud-based software for government agencies and financial institutions handling tax administration, payment processing, and auctions. The company operates three core products: TaxSys (tax billing and collection, used for $21B of Florida property-tax revenue), RenewExpress (vehicle and vessel registration), and PaymentExpress (secure e-payment processing). Grant Street also runs the world's largest internet auction platform for financial and legal instruments, having conducted auctions for over 6,800 government and financial entities. The company is headquartered in Pittsburgh and operates across the United States.

HeadquartersPittsburgh, PA

Company Size201–500 employees

Founded1997

Hiring MarketsUnited States

Frequently Asked Questions

What technology stack does Grant Street Group use?

Frontend: JavaScript, React, Vue, TypeScript. Backend: Python, Java, C++, C#, Go. Data: PostgreSQL, MySQL, Exasol, RabbitMQ, Apache NiFi, Tableau. Tools: Jest, Playwright, Webpack, Vite, Git, Linux.

What is Grant Street Group currently working on?

Active projects include TaxSys implementations for large county governments, client migrations to TaxSys, legacy tax data reverse-engineering, contract lifecycle management, analytics dashboards, and predictive forecasting models for government tax operations.