Senior Full-Stack Software Engineer, PsiQuantum
Quantum Architecture / Platform
$150-210k
Salary dependent on location + Equity
Office located in Palo Alto, CA
Quantum computer builder
Open for applications
Quantum computer builder
501-1000 employees
Open for applications
$150-210k
Salary dependent on location + Equity
Office located in Palo Alto, CA
501-1000 employees
Company mission
To build and deploy useful, fault tolerant quantum computers.
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 and Google, 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 recently securing $1B in funding, making it the largest funding round for a quantum computing startup.
Steph
Company Specialist at Welcome to the Jungle
Insights
16% employee growth in 12 months
Company
Funding (last 2 of 7 rounds)
Jun 2025
$1bn
GROWTH EQUITY VC
Jun 2024
$125m
CONVERTIBLE
Total funding: $2.7bn
Company benefits
- Financial & Retirement: 401(k) with company match, equity grants, and access to financial wellness tools and planning resources.
- Health: Competitive health coverage for you and your dependents that go beyond your standard medical, dental & vision.
- Wellness: $200 quarterly health reimbursement, 12 therapy + 6 coaching sessions with Modern Health for you and depndents, and annual membership to Care.com.
- Time Off: Discretionary Time Off (DTO) for full-time employees in addition to federal holidays and an end-of-year company shut-down.
- Family Leave: 12 weeks of paid parental leave with the support of a dedicated leave consultant.
- Flexible WOrk: Work in office, hybrid, or remote depending on your team and location.
Company HQ
Palo Alto, CA
Leadership
Jeremy O'Brien
(Co-Founder & CEO)Prior to founding PsiQuantum, researched and taught at universities across the world, including Bristol, Stanford, Osaka, Sydney and Queensland.
Mark Thompson
(Co-Founder & 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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