Software Engineer
Senior developer responsible for maintaining and enhancing a mission‑critical AI platform, leveraging Visual Basic and .NET to build robust, scalable solutions that power enterprise AI applications.
3Pillar is an AI transformation partner on a mission to help enterprises build the AI-native products and intelligent agents that will define the next era of business. With teams across North America, Europe, Latin America, and Asia, we work with the most ambitious companies in financial services, healthcare, media, and technology — helping them move faster, modernize boldly, and compete on their own terms. Our HelixAI platform and Helix Pods delivery model put our engineers at the center of real agentic transformation — doing work that is open, portable, and built to last. We are building the future of enterprise AI.
Management of a Mission-Critical Platform:
3Pillar invites you to join an elite team taking direct ownership of the legacy code that runs a regulated, multi-state utility-and-rent billing platform. Imagine you: stabilizing 18-year-old VB6 components that touch every resident bill, reverse-documenting modules no one else can read, and partnering with the active core-engine owner to keep month-end running while the strangler-fig modernization unfolds around you.
This role is not a greenfield assignment and is not a maintenance-only seat. It is a high-leverage role for an engineer who is energized by complex, undocumented, regulation-bound code — and who knows how to make a legacy estate safer, more observable, and more migratable, one surface at a time. Seize the chance to be the person the team trusts when the bill-generation cycle, the rate-aggregation engine, or a state-specific tax proc needs an expert's hand. 🧭🔥
Key Responsibilities
Independently own, maintain, and extend the legacy billing surfaces — the VB6 COM components, the classic ASP / VBScript operator pages, the SQL Server T-SQL billing procedures, and the ASP.NET WebForms screens that wrap them.
Partner with the existing COM component owner (who keeps the bill-generation core) on shared interfaces, change windows, and parallel-run validation.
Reverse-document and add safety tests to the highest-risk undocumented modules — the rate-aggregation engine, the jurisdiction-specific tax and regulatory procs (CARE / FERA / WSA / state-specific admin fees), the classic-ASP operator UI for revenue-affecting workflows, and the Australia-specific billing logic and its opaque property-settings keys.
Prove and maintain the VB6 build for the full legacy estate, including the three licensed-dependency report DLLs (ActiveReports 2.0 components, Persits AspPDF, SoftArtisans ExcelWriter 4.0).
Plan and execute the migration of the most fragile legacy surfaces over time
Minimum Qualifications
A minimum of 6+ years of experience as a software engineer.
Strong, current expertise in
VB6 and COM / COM+ interop,
classic ASP and VBScript,
T-SQL on Microsoft SQL Server (stored procedures, query tuning, schema reasoning),
ASP.NET WebForms.
High level of English
Posted June 21, 2026