Senior Full-Stack Software Engineer, PsiQuantum

Quantum Architecture / Platform

$150-210k

Salary dependent on location + Equity

MongoDB

AWS

Python

Django

Redis

Postgres

Terraform

MySQL

Prometheus

Flask

Grafana

REST API

FastAPI

Pydantic

Senior and Expert level

San Francisco Bay Area

Office located in Palo Alto, CA

Quantum computer builder

Be an early applicant

Quantum computer builder

201-500 employees

B2BEnterpriseManufacturingDeep TechScience

Be an early applicant

$150-210k

Salary dependent on location + Equity

MongoDB

AWS

Python

Django

Redis

Postgres

Terraform

MySQL

Prometheus

Flask

Grafana

REST API

FastAPI

Pydantic

Senior and Expert level

San Francisco Bay Area

Office located in Palo Alto, CA

201-500 employees

B2BEnterpriseManufacturingDeep TechScience

Company mission

To create the world’s first useful fault tolerant, error corrected quantum computer that will solve otherwise impossible problems.

Job

Company

Role

Who you are

Bachelor's Degree or higher in Computer Science, Engineering or equivalent professional experience
8+ years building backend/platform systems in Python, including leading significant re-architecture efforts
Expert-level Python (async, packaging, profiling) with production experience in FastAPI/Flask/Django and typed interface patterns (pydantic/mypy)
Demonstrated success shipping reproducible pipelines or workflow engines that span HPC/Slurm-style schedulers and cloud infrastructure, including task orchestration and artifact provenance
Deep AWS + Terraform experience across multi-environment deployments; comfortable wiring auth layers and managing secrets/service identities
Strong database and state-system background (Postgres/MySQL/Mongo + Redis/Valkey), covering schema design, migrations, query tuning, and cache/state orchestration
History of designing and maintaining internal APIs/SDKs (REST/gRPC/Python clients) with clear contracts, versioning, and documentation practices
Hands-on with CI/CD, static analysis, typed Python tooling, observability stacks (Prometheus/Grafana/OpenTelemetry, profilers) to keep services reliable and diagnosable
Bonus: experience building platforms that serve research-heavy or experiment-driven teams, where complex workflows and long-running jobs demand clear interfaces and repeatable execution

What the job involves

We are seeking a Full-Stack Software Engineer to own the design, implementation, and evolution of the backend and web systems that underpin the Quantum Architecture (QA) platform
This role blends deep software engineering expertise in Python, distributed systems, and web architecture, with the ability to design clean interfaces and build robust, composable infrastructure for scientific and computational workflows
You’ll work directly with physicists, software engineers, and researchers to turn computational ideas into sustainable, high-value software systems that drive the simulation and exploration of quantum architectures
Lead the redesign of our core architecture platform backend, defining clear service boundaries and APIs in Python so simulation, data, and UI layers stay decoupled and manageable
Build resilient Python-first pipelines that move jobs, configs, and artifacts between on-prem/HPC environments and cloud services, emphasizing reproducibility and debuggability
Own database and caching strategy-schema/version design, indexing, migrations, and Redis/Valkey-backed state layers-so long-lived experiments evolve without breaking downstream users
Stand up and operate Terraform-managed AWS infrastructure (EC2/EKS/S3/IAM, etc.), integrate authN/Z (OAuth2/OIDC/SSO), and embed logging/metrics/tracing for operational clarity
Deliver internal tooling (CLIs, REST/gRPC endpoints, Python SDKs) and documentation that let researchers and engineers launch, observe, and compare simulations without digging through multiple repos
Raise the engineering bar: typed Python, thorough testing, CI/CD gates, and mentoring peers on platform design, performance tuning, and modular system composition

Our take

Quantum computing will change the world more than any other imminent technological development, and PsiQuantum sits at the forefront of the charge to build the first quantum computer that will actually work.

The company is unique for the scale of their ambitions. Rather than focusing on what they term “intermediate milestones” like building smaller proof of concept systems, PsiQuantum builds the first large-scale, error-corrected computer, using photonics to deliver over 1,000,000 qubits (current quantum machines have yet to cross the 1,000 qubit mark).

There are plenty of companies building quantum computers, including the likes of IBM, Google and Honeywell, but these prototypical machines lack the size to correct errors, making them exponentially less useful than what PsiQuantum aims for. While other companies operate in the same sphere, PsiQuantum is unequivocally a leader in its field, founded by world-class academics and raising hundreds of millions in funding to reach unicorn status.

Steph

Company Specialist at Welcome to the Jungle

Insights

Top investors

16% employee growth in 12 months

Glassdoor (3.5)

Company

Funding (last 2 of 7 rounds)

Jun 2025

$1bn

GROWTH EQUITY VC

Jun 2024

$125m

CONVERTIBLE

Total funding: $2.7bn

Company HQ

Palo Alto, CA

Leadership

Jeremy O'Brien

(CEO)

Prior to founding PsiQuantum, researched and taught at universities across the world, including Bristol, Stanford, Osaka, Sydney and Queensland.

Mark Thompson

(Chief Technologist)

Previously worked as an R&D Engineer at Toshiba and was a research fellow at the University of Cambridge. Is currently a Professor of Quantum Photonics at Bristol University as well as Chief Technologist at PsiQuantum.

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