Senior Engineer, Quantum Algorithms (Optimization)

Quantum Computing Inc.; Hoboken (NJ); On-site; USD 150,000 - 200,000; Full time

Job summary

Quantum Computing Inc. in Hoboken, NJ, seeks a Software Engineer with deep expertise in mathematical optimization and quantum algorithm development. You will architect the core software engine for our photonic quantum processors, blending advanced optimization with optical hardware feedback.

You will design a high-performance C++ runtime and HAL, optimize critical paths, and collaborate with hardware and firmware teams to map complex problems onto quantum-enabled hardware.

Qualifications

• 6+ years of software engineering experience focused on systems or HPC.
• Strong C++ and Python proficiency.
• Experience with quantum algorithms, quantum information, or quantum optics.
• Background in Convex Optimization, QP, MILP, or Gradient-Free Methods.
• Experience with Numerical Analysis and high-performance math libraries.
• Familiarity with protocols (UART, SPI, gRPC, REST) and software integration.
• Strong performance tuning, memory management, and fault-tolerant design.
• Familiarity with Linux system programming and CMake build tools.
• Experience in cross-functional teams with hardware, physics, and software.

Responsibilities

• Design and implement high-performance C++ runtime and HAL for photonic optimization.
• Profile and optimize critical paths to minimize latency and memory bottlenecks.
• Collaborate with FPGA, Electrical, and Firmware engineers on interfaces.
• Develop algorithmic enhancements for quantum feedback to improve solutions.
• Write efficient, thread-safe code for concurrent hardware control and processing.
• Map optimization and ML problems to photonic quantum processors with post-processing.
• Build layers to orchestrate large-scale optimization across hardware resources.
• Contribute to quantum algorithms on the company roadmap.

Skills

C++

Python

Quantum algorithms

HPC

Multi-threading

Linux

CMake

Performance profiling

Signal processing

Hardware abstraction

Algorithm design

Mathematical optimization

Education

MS/PhD in CS, Physics, or Mathematics

Tools

BLAS

LAPACK

Eigen

Job description

Job Title: Software Engineer, Quantum Algorithms (Optimization)

Location: Hoboken, NJ

Division: Technology

Department: Engineering

About Us

Quantum Computing Inc. (QCi) (Nasdaq: QUBT) is an innovative, integrated photonics company that provides accessible and affordable quantum machines to the world today. QCi products are designed to operate at room temperature and low power at an affordable cost. The Company's portfolio of core technology and products offer unique capabilities in the areas of high-performance computing, artificial intelligence, cyber security as well as remote sensing applications.

Position Description

We are looking for a Software Engineer with deep expertise in Mathematical Optimization and quantum algorithm development. This role is critical in architecting the core software engine that drives our proprietary photonic quantum processors, combining complex mathematical formulations with physical optical hardware feedback.

Responsibilities

• Design and implement the high-performance C++ runtime and Hardware Abstraction Layer (HAL) for photonic optimization computers
• Profile and optimize critical execution paths to minimize latency, addressing bottlenecks in memory bandwidth, cache locality, and data transfer
• Collaborate with FPGA, Electrical engineers and Firmware engineers to ensure to create, test, and optimize device interfaces.
• Develop algorithmic enhancements to usage of quantum feedback to solve NP hard optimization problems more efficiently with higher solution quality.
• Write efficient, thread-safe code for concurrent hardware control and real-time signal processing.
• Design and implement novel algorithms that map optimization and machine-learning problems onto entropy-based photonic quantum processors, including post-processing pipelines.
• Build software layers to decompose and orchestrate large-scale optimization problems across multiple photonic hardware resources.
• Contribute to quantum algorithms on the company roadmap

Required Qualifications

• 6+ years of experience in software engineering with a focus on systems or HPC.
• Strong proficiency in C++ and Python
• Experience with quantum algorithms, quantum information, or quantum optics.
• Strong mathematical background in Convex Optimization, Quadratic Programming (QP), Mixed-Integer Linear Programming (MILP), or Gradient-Free Methods.
• Experience with Numerical Analysis and high-performance math libraries (e.g., BLAS, LAPACK, Eigen).
• Familiarity with protocols (e.g., UART, SPI, gRPC, REST) and software integration.
• Strong understanding of performance tuning, memory management, and fault-tolerant design.
• Familiarity with Linux system programming and build toolchains (CMake, GCC/Clang).
• Experience working in cross-functional teams involving hardware, physics, and software.

Preferred Qualifications

• Advanced degree (MS/PhD) in Computer Science, Physics, or Mathematics.
• Experience with classical optimization solvers (e.g., CPLEX, Gurobi) or heuristic frameworks.
• Familiarity with Open Quantum Systems or optical feedback mechanisms.
• Background in Digital Signal Processing (DSP) or control theory.
• Knowledge of containerized deployment using Docker.

Skills

C++, Quantum Algorithms, High Performance Computing (HPC), Algorithm Design, Mathematical Optimization,, Multi-threading, Linux, CMake, Python, Performance Profiling, Hardware Abstraction, Signal Processing

Quantum Computing Inc. (QCi) is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability, protected veteran status, or any other characteristic protected by applicable federal, state, or local law.

Incumbent(s) in this position may be required to perform other duties and special assignments not specifically stated above. Statements outlined in this section are designated as essential job functions in accordance with the Americans with Disabilities Act of 1990.