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Principal Software Engineer

Philadelphia, PA, us💼 Full-time💰 $115,000–$115,000🗓 2026-05-21 → 2026-07-31

Core

Configure and extend FAST/GenTax functionality for City-specific use cases, design and maintain services/integrations connecting Revenue IT systems with other City applications, and optimize SQL for reporting and data migration.

Role type

Principal Software Engineer (Revenue Systems)

Builds

Revenue IT services, integrations, and APIs connecting City applications and data sources

Domain

Government / Public Sector / Revenue Systems

Deliverable

production ML models | product features | dashboards & analysis | infrastructure

Required skills

C# (.NET), SQL (SQL Server/Oracle/PostgreSQL), API design, system integration, agile development, code review, technical documentation, debugging complex multi-system issues

Preferred skills

FAST/GenTax configuration, eventing/messaging/ETL patterns, large governmental/non-profit agency experience, City of Philadelphia domain knowledge

Technologies

C#, .NET, SQL Server, Oracle, PostgreSQL, MySQL, FAST tools

Responsibilities

Configure and extend FAST/GenTax functionality for City-specific use cases; Design, build, and maintain services, integrations, and APIs; Write and optimize SQL for reporting and data migration; Review code and write unit/integration tests; Support production systems by triaging incidents and debugging; Document designs, decisions, and runbooks

Seniority

Principal, hands-on IC with strategic ownership

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