Senior Engineer, Backend: Cloud & API Development

QUANTUM COMPUTING, INC.; United States; Remote; USD 140,000 - 210,000; Full time

Job summary

Quantum Computing Inc. seeks a Senior Engineer, Backend: Cloud & API Development, to maintain and grow cloud APIs for interacting with photonic quantum hardware. You will design RESTful services in Golang/Python, build asynchronous workflows with message brokers, and secure APIs with OAuth2/OIDC/mTLS in a distributed stack.

The role spans cloud and on-premise environments, requiring distributed-systems expertise and solid CI/CD experience to ship reliable services.

Qualifications

• 4+ years of professional backend software engineering experience.
• Expert proficiency in Golang and Python for production services.
• Strong background in message queuing systems (RabbitMQ, Kafka, or NATS).
• Proven track record implementing API security best practices (OAuth2, JWT).
• Experience designing scalable SQL/NoSQL databases with indexing/TTL.
• Familiarity with CI/CD pipelines and automated testing strategies.

Responsibilities

• Design, build, and maintain high-performance RESTful APIs using Golang and Python.
• Architect asynchronous, event-driven workflows with RabbitMQ or similar brokers.
• Optimize service-to-service communication for low latency in a distributed stack.
• Monitor system health and implement distributed tracing for complex interactions.
• Implement API security (OAuth2, OIDC, mTLS) and best practices.
• Contribute to CI/CD deployment and testing patterns.

Skills

Golang

Python

Kubernetes

RabbitMQ

Microservices

REST APIs

gRPC

OAuth2

Docker

PostgreSQL

Linux

Git

CI/CD

MongoDB

FastAPI

Tools

RabbitMQ

Kafka

NATS

GitLab CI

GitHub Actions

Docker

PostgreSQL

MongoDB

Job description

Position: Senior Engineer, Backend: Cloud & API Development

Location: Remote

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. We are the pioneers of Entropy Quantum Computing (EQC), utilizing open quantum systems to solve NP-hard optimization problems. The Company’s portfolio offers unique capabilities in high-performance computing, artificial intelligence, cybersecurity, and remote sensing.

Position Description:

We are seeking a Senior Cloud API Developer to maintain and develop our cloud APIs which allow users to interact with our photonic quantum hardware. In this role, you will maintain and expand a microservices ecosystem that orchestrates complex optimization jobs, manages user access, and connects high-level cloud APIs and low-level hardware controllers.

You will be working in a hybrid environment, developing services that will run on cloud as well as on resource-constrained on-premise hardware stacks. This is a role that requires expertise in distributed systems, asynchronous event messaging, and strict API security standards.

Responsibilities:

• Design, build, and maintain high-performance RESTful APIs using Golang and Python to support a broad ecosystem.

• Architect asynchronous, event-driven workflows using RabbitMQ (or similar message brokers) to decouple job scheduling, hardware execution, and result processing.

• Optimize service-to-service communication to ensure low latency and high reliability across a distributed stack.

• Monitor system health and implement distributed tracing to debug complex microservice interactions.

• Implement industry-standard security best practices for API authentication and authorization (OAuth2, OIDC, mTLS).

• Work within existing deployment and testing patterns to add new services to CI/CD.

Required Qualifications:

• 4+ years of professional backend software engineering experience.

• Expert proficiency in Golang and Python for production services.

• Strong background in message queuing systems (RabbitMQ, Kafka, or NATS) and event-driven architecture patterns.

• Proven track record of implementing API security best practices, including OAuth2, JWT, and protection against OWASP Top 10 vulnerabilities (Injection, Broken Auth).

• Experience designing scalable database schemas (SQL, NoSQL) and managing databases with indexing and TTL.

Preferred Qualifications:

• Experience with gRPC and Protocol Buffers

• Experience with CI/CD pipelines (GitLab CI, GitHub Actions) and automated testing strategies.

Skills

Golang, Python, Kubernetes, RabbitMQ, Microservices, REST APIs, gRPC, OAuth2, Docker, PostgreSQL, Linux, Git, CI/CD, MongoDB, FastAPI

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.