# Internship - FPGA Hardware Design - PQ Cryptography Hardware Accelerator

> Cryptonext Security · Paris, France · Temporary · Posted 2026-08-23

**Workplace:** on_site

## Description

### Who we are

CryptoNext Security is a deeptech startup specializing in post-quantum cryptography. Our solutions help businesses and institutions prepare for a future where quantum computers will challenge traditional data security. We work with leading clients in finance, defense, and telecommunications.

###   
**About the role**

As part of an exploratory project on **hardware accelerators for post-quantum cryptography (PQC)**, we are looking for a highly motivated **FPGA Hardware Design Engineer** to take ownership of a key strategic project at the intersection of **hardware/software codesign (FPGA development and low-level C)** and **post-quantum cryptographic accelerators**. You will work on the design, integration, and evaluation of hardware accelerators for well-identified mathematical functions used in post-quantum cryptographic algorithms, with a strong focus on demonstrating concrete performance benefits on a real embedded platform.

**Your mission**

You will study state-of-the-art approaches described in the scientific literature on PQC hardware acceleration, including relevant academic work such as [this recent study](https://dl.acm.org/doi/epdf/10.1145/3689939.3695785), and implement the selected ones. You will focus in particular on the **Number Theoretic Transform (NTT)** and the **Keccak state permutation function**, two key computational functions involved in the implementation of algorithms such as ML-KEM and ML-DSA (lattice-based PQC algorithms).

You will be responsible for **developing system-level RTL code using SystemVerilog**, integrating the resulting accelerators into a complete hardware/software system, and evaluating their impact on application-level performance. The target platform will be an **AMD Xilinx ZCU104 development board**, equipped with a **Zynq UltraScale+ MPSoC**.

The primary objective of the internship is to demonstrate, on the target platform, that a hardware accelerator for either the **NTT** or the **Keccak permutation** can effectively accelerate the corresponding **ML-KEM** or **ML-DSA** implementation in the **CryptoNext Quantum Safe Library (C-QSL)**.

## Requirements

**Required skills**

### Must-have

-   **FPGA development, RTL design using Verilog, SystemVerilog or VHDL**
-   Experience with **AMD Vivado** or **Intel Altera Quartus** and FPGA development platforms
-   Good programming skills in **C** under **Linux**, with basic knowledge of assembly language
-   Strong interest in hardware/software codesign and embedded systems
-   Experience with **Git** and standard software development workflows
-   Familiarity with **shell scripting**, **Makefiles**, and compiler toolchains
-   Experience using **profilers and debuggers** to analyze and optimize software performance
-   Ability to work independently, investigate technical problems, and communicate results clearly

### Nice-to-have

-   Knowledge of **AMBA protocols**, such as **AXI, AHB, APB, or CHI**
-   Experience with **JTAG-based debugging**
-   Experience with **QEMU**, including the **Xilinx fork of QEMU**
-   Experience with **QEMU/SystemC/Verilator co-simulation**
-   Previous exposure to **post-quantum cryptography**, lattice-based cryptography, **ML-KEM**, **ML-DSA**, NTT or DFT, or Keccak (or more generally hash functions)
-   Familiarity with embedded Linux and **Zynq UltraScale+ MPSoC** architectures

## Benefits

**Internship details**

-   **Duration:** 6 months
-   **Period:** December 2026 – June 2027
-   **Education:** Final-year engineering student or **M2 / Master's degree** in computer engineering, electrical engineering, embedded systems, microelectronics, or a related field

## Apply

[Apply at Cryptonext Security](https://apply.workable.com/cryptonext-security/j/3F404B7363/apply)

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