Senior QA Engineer Job Cape Town South Africa,IT/Tech

Job Description

THE OPPORTUNITY THAT AWAITS YOU

New opportunity alert!!! We are looking for a highly skilled and technically experienced Senior QA Engineer (Payments) to join a cutting-edge fintech company shaping the future of digital payments across Africa. Our client empowers businesses of all sizes - from startups to enterprise merchants - by providing a secure, scalable, and seamless payments infrastructure. The successful candidate will be expected to help revolutionise the quality assurance function, transitioning to a proactive, "shift-left" approach where QA Engineers are embedded within engineering pods.

As a Senior QA Engineer within the Card Rails team, you will occupy a critical junction between legacy stability and future innovation. You will own and lead the quality assurance strategy, ensuring our systems meet rigorous ISO
8583 standards for Acquirer and Scheme sign-off, while simultaneously architecting AI-driven automation to redefine how we validate payment life cycles.

YOUR KEY RESPONSIBILITIES

Deep understanding of end-to-end card payment flows, from authorization through clearing, settlement, and reconciliation, across both Card-Present (CP) and Card-Not-Present (CNP) channels.

Design risk-based test strategies aligned with payment scheme rules, merchant use-cases, and regulatory requirements.

QA experience validating EMV transaction flows (contact & contactless), including:

Application selection, CVM processing, offline vs online decisioning, and issuer scripting.

Validation of EMV tags, TLV structures, and kernel behaviour across different transaction paths.

Hands-on L3 device testing, including:
Certification-style functional, negative, and edge-case testing.

Validation of terminal behaviour against scheme and kernel specifications.

Coordination of regression testing across firmware, kernel, and host changes.

Quality assurance for eCommerce card transactions, including:
Authorization, capture, refund, and reversal flows.

3-D Secure (where applicable), fraud signals, and risk decisioning scenarios.

Idempotency, retry logic, and failure-mode testing for high-volume online traffic.

Test design and validation for pre-authorizations, incremental authorizations, and delayed captures, including:
Amount adjustments, partial captures, and expiry handling.

Scheme-specific rules and edge cases across different acquirers and merchant categories.

State consistency across payment lifecycle events.

QA coverage for card tokenization flows, including:
Token creation, storage, lifecycle management, and detokenization controls.

Validation of PCI-DSS-aligned data handling and masking rules.

Testing of token usage across recurring, stored-card, and merchant-initiated transactions.

Testing of payment switch processing, including:
Routing logic, failover behaviour, and timeout handling.

Acquirer-specific rules, field mappings, and response code handling.

Resilience, concurrency, and throughput testing under peak transaction loads.

QA validation aligned with card scheme specifications (e.g. Visa, Mastercard), including:
Transaction types, reason codes, and lifecycle consistency.

Compliance with scheme mandates and rule changes.

Regression strategies to safely roll out scheme updates.

OUR REQUIRED EXPERTISE

Strategic Solution Design:
Ability to design elegant, scalable solutions for new acquirer integrations and to tackle systemic quality problems at scale.

Proactive Ownership:
Take initiative, own projects end-to-end, thrive in fast-paced, high-scale environments, and proactively identify and propose solutions for quality gaps while abstracting testing complexity.

Cross-Functional Collaboration:

Work effectively in fully remote teams, with strong written and verbal English communication skills, and comfortable collaborating cross-functionally with product, operations, and external partners.

Technical Articulation:
Ability to clearly articulate complex technical and quality concepts to diverse audiences.

Mentor and empower engineers in quality practices and tooling through constructive feedback.

Familiarity with:
Typescript, JavaScript, Node.js, AWS (Lambda, Serverless), MySQL, Postgre

SQL, Jira, Confluence, Git, K6.io, Cypress, Postman, CI/CD & Automation:
Git Lab Pipelines, Fusion Reactor / Logz.io

YOUR REWARD

A competitive salary (depending on experience in line with requirements)

An opportunity to work with one of the fastest-rising payments companies in South Africa.

Exposure to working with the latest technologies

An opportunity to work from anywhere in South Africa


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