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. 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. 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. A minimum of 6+ years of experience as a software engineer. T-SQL on Microsoft SQL Server (stored procedures, query tuning, schema reasoning), NET WebForms.





High level of English proficiency required to interact with a globally-based engineering and operations team. Strong instincts for safety-of-change: small commits, change-budget thinking, parallel-run validation, feature-flag gating, and explicit rollback plans. Direct experience with regulated or financial billing calculations — utility billing, telecom rating, insurance premium computation, or comparable.

Familiarity with the Windows Server / IIS / Task Scheduler operational surface that legacy billing platforms typically run on.

Medical

Insurance benefits as per company policy. Vacation bonus as per local law Sick leave and paid holidays as per local law Profit sharing as per local law Paternity and maternity leave as per as per local law Marriage, bereavement and graduation leaves as per company policy Christmas bonuses as per local law Work from home allowance as per company policy Direct deposit of payroll. What is it like working for 3Pillar Global?

Imagine a flexible work environment -- whether it's the office, your home, or a blend of both. From interviews to onboarding, we embody a remote-first approach. You will be part of a global team, learning from top talent around the world and across cultures, speaking English everyday.

Our global workforce enables our team to leverage global resources to accomplish our work in efficient and effective teams. Whether it is taking advantage of fitness offerings, mental health plans (country-dependent), or simply leveraging generous time off, we want all of our team members operating at their best. Our professional services model enables us to accelerate career growth and development opportunities - across projects, offerings, and industries.

It goes without saying that we live by values like Intrinsic Dignity and Open Collaboration to create cutting-edge technology AND reinforce our commitment to diversity - globally and locally. Join us and be a part of a integral tech community! Check out our Linkedin site and Careers page to learn more about what it's like to be part of our #oneteam!

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📌 Senior Visual Basic Software Developer (Iztacalco)
🏢 3Pillar
📍 Iztacalco