We are looking for an experienced Lead QA Engineer to own quality for the Net2Phone billing platform. We are building a billing system where every invoice is provably correctly rated, taxed, prorated, reconciled and where the team can defend that claim with documented coverage rather than assumptions.
You will focus on testing billing correctness end-to-end: how a call becomes a rated record and then an invoice line, where usage gets lost or double-counted between the switch and the bill, how proration behaves when a customer changes plans mid-cycle, and how a third-party tax engine's output is verified when you can't inspect it. You are equally skilled in leading a team: setting the documentation standard, acting as the intake gatekeeper with Product, and deciding where automation effort yields true value.
This is a manual-testing-heavy position: automation leadership here means planning, prioritization, and coverage governance, not day-to-day framework development. You will not be the primary implementer, but you will be expected to read, review, and debug the team's suites.
- PLEASE SUBMIT CV IN ENGLISH.
- ONLY ACCEPTING CANDIDATES FROM LATAM.
- ADVANCED SPOKEN ENGLISH IS REQUIRED.
Responsibilities
- Act as an active member of a Scrum team, participating fully in all agile ceremonies and maintaining all related artifacts.
Own the test strategy for billing: Covering rating, mediation, invoicing, taxation, payments, credits, adjustments, dunning, and reseller/white-label billing hierarchies.
Design and document test coverage for month-end billing cycles, including cutoff and timezone boundaries, reruns, partial failures, and retry safety.
Perform revenue-assurance testing: Reconciling CDR volumes against invoiced amounts and quantifying the financial impact of any discrepancies.
Trace billing discrepancies to their root cause: Distinguishing rating-engine defects from mediation or switch-side issues, including reading SIP traces or packet captures when necessary.
Enforce the requirement intake gate: Ensuring no user story enters a sprint without testable acceptance criteria.
Set and enforce documentation standards: Ensuring requirement-to-test-case traceability and reviewable per-epic coverage.
Drive the automation roadmap: Deciding what gets automated, in what order, and with what expected ROI, while conducting code and test reviews for the resulting suites.
Establish and report billing quality metrics: Defect escape rate, coverage, defect density, and release readiness.
Mentor billing QA engineers and provide clear technical direction.
Communicate and escalate product quality risks: Holding ground when supported by data.
Requirements:
8+ years in QA, including hands-on experience with a production billing, rating, or payments system.
Working knowledge of rating and usage billing: Rate decks, prefix matching, billing increments, minimum durations, connection fees, and destination zones.
Subscription billing experience: Recurring and non-recurring charges, mid-cycle proration, upgrades, downgrades, trials, promotions, and discounts.
Invoicing experience: Invoice generation, line-item totals, usage detail, credit memos, manual adjustments, refunds, and dunning.
Strong SQL skills (joins, aggregations, window functions) sufficient to reconcile usage against invoices independently.
Precision and rounding literacy: Decimal vs. floating-point representation, rounding modes, line-level vs. invoice-level rounding, and identifying where each produces cent-level defects.
Proven experience leading or mentoring QA engineers.
A track record of pushing back with evidence: Rejecting untestable requirements, holding releases based on data, and negotiating scope using metrics.
Proficiency with a formal Test Management System (TMS) and Jira.
Professional English proficiency (spoken and written) with reliable overlap with US Eastern business hours
We use the following technologies:
- Python & Pytest: For service and integration automation.
Playwright: For UI automation.
SQL: For billing and rating data validation—this is a daily tool in this role, not an occasional one.
Allure TestOps: As our Test Management System (TMS). Automated test cases are linked to TMS cases, and we expect QA to extend coverage directly within it.
Jira: For project management and defect tracking.
GitHub Actions (GHA) & Jenkins: For CI/CD, leveraging shared pipeline libraries.
Grafana: For monitoring quality and delivery metrics, including defect escape rate.
Third-Party Tax Engine: For telecom tax and regulatory fee calculations.
We are always open to adopting any reasonable tool that drives higher quality into the product.
Pluses:
Working knowledge of SIP/VoIP call flows as they relate to billable records: call legs, answered vs. unanswered calls, billable vs. elapsed duration, transfers, and conference legs.
Proficiency in Python/pytest and Playwright: Valued for reviewing, debugging, and evaluating test automation, rather than building frameworks from scratch.
REST API testing experience against billing and rating services.
Payment gateway integration testing experience.
Telecom tax engine validation (Avalara, SureTax, Vertex, or equivalent).
Multi-currency and FX (foreign exchange) handling experience.
Familiarity with Jenkins and GitHub Actions (GHA) pipelines, sufficient to analyze and interpret build results.
We are pleased to offer:
Remote work opportunity!
B2B Employment ($, gross).
Stable job with long-term growth perspective.
Competitive salary with annual performance review.
Really good hardware.
An exciting and challenging job with talented people around.
Continuous learning and career growth opportunities.
Compensation for professional training, seminars, and conferences.
Referral program: get rewarded for helping us grow the team with talented people.
Company-supported English classes to enhance your professional growth.
IDT Technologies is a part of IDT Corporation—an American telecommunications company founded in 1990 and headquartered in New Jersey. It is an industry leader in prepaid communication and payment services and one of the world's largest international voice carriers. We are listed on the NYSE, employ over 1,500 people across 20+ countries, and have revenues in excess of $1.5 billion.
Net2Phone (https://www.net2phone.com/) is a global provider of unified cloud communications solutions. It offers an integrated communications suite featuring powerful collaboration tools, including voice, messaging, chat, and unlimited domestic and international calling to 23+ countries.
PLEASE SUBMIT CV IN ENGLISH
Skills Required
- 8+ years of QA experience, including hands-on experience with a production billing, rating, or payments system
- Working knowledge of rating and usage billing, including rate decks, prefix matching, billing increments, minimum durations, connection fees, and destination zones
- Subscription billing experience covering recurring and non-recurring charges, proration, upgrades, downgrades, trials, promotions, and discounts
- Invoicing experience, including invoice generation, line-item totals, usage detail, credit memos, adjustments, refunds, and dunning
- Strong SQL skills, including joins, aggregations, and window functions
- Knowledge of decimal and floating-point precision, rounding modes, and line-level versus invoice-level rounding
- Experience leading or mentoring QA engineers
- Evidence-based quality leadership, including rejecting untestable requirements and holding releases based on metrics
- Proficiency with a formal Test Management System and Jira
- Professional spoken and written English with reliable overlap with US Eastern business hours
- Candidates must be located in Latin America
- CV submitted in English
- Advanced spoken English
- Working knowledge of SIP/VoIP call flows and billable records
- Proficiency in Python, Pytest, and Playwright for reviewing and debugging automation
- REST API testing experience
- Payment gateway integration testing experience
- Telecom tax engine validation experience with Avalara, SureTax, Vertex, or equivalent
- Multi-currency and foreign exchange handling experience
- Familiarity with Jenkins and GitHub Actions pipelines
IDT Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about IDT and has not been reviewed or approved by IDT.
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Healthcare Strength — Medical, dental, and vision coverage are included for full‑time employees, with published transparency files indicating employer‑sponsored health plans. This establishes a conventional benefits foundation across major coverage areas.
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Leave & Time Off Breadth — Paid vacation and sick time are characterized as generous, with illustrations of multi‑week vacation and defined sick‑leave allotments that can vary by team and tenure. This breadth provides a solid baseline for time away from work.
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Wellbeing & Lifestyle Benefits — Office amenities such as an on‑site gym, recreation spaces, free breakfast and coffee, and flexible work arrangements are highlighted. These wellbeing‑oriented perks augment the core package for in‑office and hybrid roles.
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