Core Engineer

4 hours ago

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Keyless

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Cybersecurity • SaaS • Enterprise

Keyless is a privacy-first authentication company that provides passwordless, biometric-based identity and multi-factor authentication solutions for consumer and workforce use cases. Its Zero-Knowledge Biometrics approach ensures no biometric data is stored centrally while delivering fast passive liveness detection and device binding across web and mobile, enabling PSD2/SCA compliance, FIDO2 certification, and self-service account recovery. Keyless offers cloud and on-prem deployments, SDKs for integration, and targets enterprises looking to reduce fraud, helpdesk costs, and reliance on passwords or hardware tokens.

51 - 200 employees

Founded 2019

🔒 Cybersecurity

☁️ SaaS

🏢 Enterprise

📋 Description

• Develop robust, high-performance C++ libraries and SDK components used across mobile, desktop, and server environments. • Own the build tooling and cross-platform compilation pipeline (Android NDK, iOS, Linux, Windows, macOS) using Make, CMake, and custom toolchains. • Implement, integrate, and optimise cryptographic primitives using OpenSSL, Botan, and internally designed secure protocols. • Contribute to our secure multiparty computation engine and privacy-preserving algorithms. • Work closely with the security team to design defences against reverse engineering, including obfuscation, hardening, symbol management, and binary protection. • Analyse performance bottlenecks, memory behaviour, and concurrency issues across diverse environments. • Build Python tooling and automation scripts to streamline development, testing, and deployment workflows. • Participate in code reviews, architecture discussions, and long-term technical roadmap planning. • Ensure delivery of high-quality, thoroughly tested, production-ready code across all supported platforms.

🎯 Requirements

• Strong expertise in modern C++ (C++17 or later) and systems-level programming. • Experience with CMake, Make, and complex build systems targeting multiple platforms. • Hands-on knowledge of cryptography (symmetric, asymmetric, hashing, key exchange) and practical experience with libraries such as OpenSSL or Botan. • Familiarity with software security, reverse-engineering resistance, obfuscation strategies, and secure code practices. • Understanding of secure protocol design, web security fundamentals, and network communication patterns. • Experience with cross-platform development, particularly Android NDK and iOS toolchains. • Proficiency with Python for tooling, automation, and scripting. • Solid understanding of operating systems, memory models, concurrency, and performance optimisation. • Ability to work autonomously on complex technical problems and communicate effectively with engineering and product teams. • Strong understanding of the LLVM compiler architecture, including its IR, optimisation pipeline, and toolchain components.

🏖️ Benefits

• Flexible working arrangements, including remote work within the EU timezone