Senior Software Security Engineer

The Role

You will own the security architecture and secure-platform engineering of our appliance products: the trusted boot chain, disk and payload encryption, hardware-backed key management, attestation, OS hardening, and the build and provisioning systems that produce tamper-resistant units. The role also involves work on our media streaming stack and its integration with third-party platforms, but the center of gravity is software security - designing, implementing, and defending the mechanisms that keep our devices and our intellectual property protected in hostile environments.

What You Will Do

. Design and maintain the appliance trust architecture: UEFI Secure Boot key hierarchy and signing workflows, measured boot, and TPM-anchored secrets

. Work with TPM 2.0 in production: key creation and attributes, PCR measurement and policy, sealed storage, remote attestation(quotes, verification chains), and LUKS/Clevis disk-encryption binding

. Harden the Linux platform end to end: kernel configuration and lockdown, IMA appraisal policy, AppArmor confinement, sysctl and module-blacklist hardening, auditd, and systemd sandboxing

. Own the secure build pipeline: hardened kernel builds, signed OS image assembly, reproducibility practices, and cryptographic verification at every stage

. Implement applied-cryptography work flows correctly: signature schemes (RSA-PSS, OAEP), authenticated encryption(AES-GCM), canonical serialization for signed documents, key ceremonies, and key-compromise response

. Build verification in frastructure: QEMU/OVMF/swTPM-based boot testing, self-tests with negative controls, andfail-closed validation gates

. Contribute to threat modeling: define adversaries and trust boundaries, document what is in and out of scope, and defend architectural invariants through written decision records

. Develop and debug within our media streaming stack (RTSP, ONVIF, media pipelines) as product work requires

. Write operator-grade tooling (bash, Python, C)and the runbooks that go with it

Required Experience

Software and platform security (core of the role):

. 5+ years in security-focused systems engineering on Linux

. UEFI Secure Boot: key hierarchy (PK/KEK/db),image signing, enrollment workflows

. TPM 2.0 hands-on experience: key attributes, PCR policies, sealing, attestation concepts (EK, AK, quotes)

. Disk encryption in production: LUKS2,cryptsetup, TPM binding (Clevis or equivalent)

. Linux hardening: mandatory access control(AppArmor or SELinux), kernel lockdown, IMA/EVM or comparable integrity mechanisms, audit frameworks

. Applied cryptography: correct use of asymmetric signatures, authenticated encryption, and verification chains - able to implement, review, and spot misuse not expected to design primitives

. Threat modeling and secure design review experience

Linux systems engineering:

. Deep Linux internals: boot process (UEFI →bootloader → kernel → init), systemd, udev, initramfs

. Building custom Linux images or distributions kernel build and configuration

. Expert-level bash and strong Python Cproficiency for systems work

. A quality bar of idempotent, fail-loud, self-tested tooling

Streaming and integration (working knowledge):

. Familiarity with video streaming protocols(RTSP/RTP) and device-integration standards such as ONVIF

. Exposure to media frameworks (GStreamer, FFmpeg, or equivalent) and debugging protocol-level issues with packet captures

. Codec-agnostic: we care about sound engineering, not any specific video format

Nice to Have

. Anti-tamper and reverse-engineering-resistance techniques: encrypted payloads, secure loaders, self-integrity checks

. Experience with air-gapped orno-update-channel deployment models and the operational discipline they require

. Secure provisioning at scale or in manufacturing contexts per-unit key management

. Reproducible builds supply-chain security awareness

. VMS/NVR platform integration experience

. Performance engineering: profiling, optimization of systems or media code

. Singapore work eligibility

How We Work

. Small team, high trust, high ownership

. Architecture decisions are written down invariants are documented and changes go through review

. Quality and paper trail matter: our units ship to security-critical deployments where compromise response is measured in recalled hardware, not hotfixes