Senior Code Review Expert

EXOGROUP CONSULTING SERVICES; Johannesburg; On-site; ZAR 600,000 - 900,000; Full time

Job summary

A financial technology consulting firm based in Johannesburg is looking for a senior Code Review Expert. You'll act as a technical quality gatekeeper, critically assessing code for financial and regulatory systems. Your responsibilities include reviewing APIs and backend services, identifying vulnerabilities, and providing clear feedback on risk severity. Strong experience in security-aware development is required, along with an understanding of async systems. This role offers an opportunity to work in a fast-paced environment focused on security and compliance.

Qualifications

• Proven experience reviewing production-grade code in sensitive systems.
• Strong background in security-aware development.
• Deep understanding of async systems and concurrency.

Responsibilities

• Review backend services, APIs, bots, integrations, and infra-adjacent code.
• Identify security vulnerabilities and logic issues.
• Act as a merge gate for production deployments.

Skills

Code review proficiency

Security-aware development

Understanding of concurrency

Job description

We are seeking a senior Code Review Expert to act as a technical quality, security, and compliance gatekeeper. Critically assess, challenge, and approve code before it reaches production in financially and regulatorily sensitive systems.

Key Responsibilities

• Review backend services, APIs, bots, integrations, and infra-adjacent code

Identify

• Security vulnerabilities
• Logic and financial correctness issues
• Race conditions, async failures, and edge cases
• Performance and scalability risks
• Review crypto-specific logic (wallets, signing flows, reconciliation, balances)
• Enforce secure coding standards and architectural boundaries
• Act as a merge gate for production deployments
• Provide clear, written feedback with risk severity (low / medium / critical)
• Support incident reviews and post-mortems where code is involved

Required Experience

• Proven experience reviewing production-grade code in sensitive systems
• Strong background in security-aware development

Deep understanding of:

• Async systems and concurrency
• Error handling and failure modes
• Database correctness and consistency

Experience with one or more of:

• Ability to reason about system-level impact, not just individual files
• Comfortable pushing back on risky or unclear implementations

Highly Desirable (Strong Advantage)

• FinTech, crypto exchange, payments, or RegTech experience
• Trading systems / market-making logic
• Exposure to DevOps / CI/CD / production deployment workflows