QNu Labs · Bangalore · In person

Before you apply

This is an early-career role (0–2 years) and an in-person one in Bangalore. We only review applications that include a link to cryptographic code you have written yourself. If you have not implemented a primitive or protocol from a specification, this is not the right role for you yet. This is not a firmware, SOC, VAPT or full-stack position.

About QNu Labs

QNu Labs is India's first and only quantum security technology company, building quantum-safe solutions that protect mission-critical data. Headquartered in Bangalore, we are backed by the National Quantum Mission under the Department of Science & Technology, Government of India.

Our patent-backed products — Armos, Tropos, QHSM and the QShield™ platform built on NIST-compliant post-quantum cryptography — are TEC-certified and deployed across the Indian Army, Navy, the public sector and global enterprises.

The role

You will take cryptographic schemes from specification to shipped product: implementing them, proving them correct, making them quick, and making them resistant to attacks that target the implementation rather than the mathematics.

The role sits in our Center of Excellence for Advanced Crypto Secure Systems, which works on problems where cryptography creates a capability conventional cybersecurity cannot.

What you'll do

- Implement primitives and protocols in C and Python, working from NIST PQC specifications, standards and papers




- Write constant-time code and harden implementations against side-channel and fault attacks
- Validate against test vectors and write the negative tests that catch the failures that matter
- Benchmark schemes across parameter sets and report numbers others can reproduce
- Take those implementations down to constrained targets, where key sizes and cycle counts actually bite

Essential

- You have implemented a cryptographic primitive or protocol yourself, from a specification, without leaning on a high-level library — and can show us the code
- Strong C or Python
- The mathematics to read a scheme rather than just its pseudocode: number theory, abstract algebra, probability
- Familiarity with lattice-based constructions and the NIST PQC standards, or the background to get there quickly
- Data structures and algorithms, with real reasoning about complexity and memory

What you'll learn here You do not need to arrive with hardware experience. We will teach you embedded development, hardware bring-up, side-channel measurement and countermeasure design on the job.

Bonus

- Zero-knowledge proofs, elliptic-curve cryptography
- Contributions to open-source crypto (liboqs, PQClean, OpenSSL or similar)
- CTF crypto categories, Cryptopals, or published cryptanalysis
- Embedded systems, OS internals, ARM

Qualifications

- Bachelor's or Master's in mathematics, computer science, or a related field. Thesis work, internships and independent projects count as much as employment history.

📌 Cryptography Engineer — Post-Quantum & Secure Implementation (Bengaluru)
🏢 QNu Labs
📍 Bengaluru