Senior Visual Basic Software Developer in Mexico at 3Pillar Global
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Job Description
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.
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
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 proficiency required to interact with a globally-based engineering and operations team.
A demonstrable track record of reading, decoding, and documenting undocumented legacy code.
Experience working alongside an active code owner on a shared critical-path component, including change-window coordination and parallel-run validation.
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.
Experience leading a modernization or strangler-fig migration of a long-lived legacy estate, including parallel-run validation harnesses and cut-over governance.
Familiarity with the Windows Server / IIS / Task Scheduler operational surface that legacy billing platforms typically run on.
Medical Insurance benefits as per company policy.
Life Insurance as per company policy
15 days of paid vacation plus additional days based on tenure
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
Punctuality and attendance bonuses as per company policy
Food tickets as per company policy
Direct deposit of payroll.
Paid professional certifications
At 3Pillar, we offer a world of opportunity:
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.
We're big on your well-being -- as a company, we spend a whole trimester in our annual cycle focused on wellbeing. 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.
We are an equal opportunity employer. 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 global tech community! Check out our Linkedin site and Careers page to learn more about what it's like to be part of our #oneteam!