Expert C++ Engineer (Fintech)

TL;DR

Expert C++ Engineer (Fintech): Designing, implementing, and maintaining features in a high-throughput payment processing platform with an accent on security, performance optimization, and integration of payment gateways. Focus on migrating legacy code towards newer C++ standards, debugging production issues, and ensuring PCI-DSS compliance.

Location: Remote (Poland)

Company

hirify.global is a custom product engineering company that supports multinational organizations and scaling startups, engineering technology that redefines industries.

What you will do

• Design, implement, and maintain features in a high-throughput payment processing platform.
• Develop and integrate payment gateways such as Braintree, Adyen, Klarna, Shift4, MPGS, and others.
• Implement security-critical functionality including encryption, secure data handling, and PCI-compliant workflows.
• Optimize transaction processing pipelines for performance, scalability, and reliability.
• Build and maintain automated tests including unit, integration, and security-focused tests.
• Investigate, debug, and resolve production issues in a complex legacy system.

Requirements

• 7+ years of professional experience with C++ in production systems.
• Strong understanding of systems programming, including memory management, concurrency, and performance optimization.
• Experience working with financial or payment processing systems.
• Solid knowledge of security best practices, including cryptography and secure handling of sensitive data.
• Experience working with large, legacy codebases.
• Familiarity with HTTP/HTTPS and RESTful APIs.

Nice to have

• Experience with Kafka or event streaming platforms.
• Experience in the financial services industry.
• Hands-on experience with OpenSSL or cryptographic libraries.
• Experience with gradual modernization of legacy systems.

Culture & Benefits

• Work alongside top professionals in a friendly, open-door environment.
• Take on large-scale projects with a global impact and expand your expertise.
• Tailored learning: internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certifications.
• Enjoy flexibility – full remote working possibilities.
• Company-paid medical insurance, mental health support, and financial & legal consultations.