Senior Software Engineer - Back End
Supio
Software Engineering
Seattle, WA, USA
USD 180k-220k / year + Equity
Posted on Oct 27, 2025
Senior Software Engineer - Back End
Seattle
Software Engineering
In office
Full-time
About Us
Supio is a trusted AI platform purpose-built for law firms, reshaping how data drives impactful outcomes. Our innovative approach blends technology with deep legal expertise, making us a leader in our field. We go beyond surface-level AI to deeply understand our customers’ daily needs, empowering law firms with unparalleled data insights. Supio delivers human-level, accurate analysis of complex data and legal records, quickly and efficiently bringing critical insights when they matter most. Trusted by top litigation lawyers, our platform has supported over $1 billion in settlements.
Headquartered in Seattle with an office in San Francisco, we raised $60M Series B in April 2025 led by Sapphire Ventures with Mayfield and Thomson Reuters Ventures, bringing total funding to $91M. We're scaling rapidly and looking for exceptional talent to join us in this next phase of growth.
We're looking for passionate team members who are motivated by our mission and ready to help us achieve it.
Who Are We Looking to Add to Our Team?
We are seeking a dedicated Senior Software Engineers to architect and implement the backend systems powering our large language model (LLM) workflows. You’ll build evaluation pipelines and feature-construction services in Python, collaborate with ML scientists to productionize models, and optimize systems for scalability and reliability. Occasional front-end work - such as lightweight UIs or dashboards - will help you navigate and monitor our environment.
Key Responsibilities
- Backend Architecture & Development: Design, build, and maintain Python-based services for LLM evaluation, data preprocessing, and feature construction.
- ML Integration: Embed statistical, mathematical, and machine-learning methods into production pipelines; collaborate closely with research and data-science teams to translate prototypes into robust applications.
- Performance & Scalability: Optimize throughput and latency of backend systems; ensure high availability and fault tolerance.
- Quality & DevOps: Write comprehensive unit and integration tests; maintain CI/CD pipelines; perform code reviews and enforce best practices.
- Cross-Functional Collaboration: Partner with ML engineers, product managers, and analysts to define requirements and deliverables.
- Documentation & Monitoring: Create clear API documentation, system diagrams, and runbooks; implement monitoring and alerting for critical workflows.
- Front-End Support (Bonus): Develop simple dashboards or tooling to visualize model outputs, metrics, and pipeline health.
Qualifications
- 6+ years of professional software development experience focusing on backend systems.
- Expert-level Python skills; strong coding ability in application development.
- Exposure to statistics, mathematics, and machine-learning concepts.
- Experience building data pipelines or evaluation frameworks for ML/LLM workloads.
- Proficiency with testing frameworks, CI/CD tools, and code-review processes.
- Solid collaboration and communication skills in agile environments.
Nice-to-Haves
- Hands-on experience with large language models or advanced AI frameworks.
- Familiarity with cloud platforms (AWS, GCP, or Azure) and containerization (Docker, Kubernetes).
- Prior experience in startups or fast-paced tech settings.
- Backend expertise in microservices, RESTful APIs, and database technologies.
The base salary range for this position in the selected region is $180,000-$220,000 annually + equity. Compensation may vary outside of this range depending on a number of factors, including a candidate’s qualifications, skills, competencies, and experience.
Benefits & Perks
Supio offers an extensive benefits package and perks which include:
- Health insurance: medical, dental, and vision
- 401k
- Flexible paid time off (PTO) and company-paid holidays
- Monthly commuter subsidies
- DoorDash subsidies for breakfast and dinner
E-Verify Participation Notice
Supio participates in E-Verify, an employment authorization program through the U.S. Department of Homeland Security and the Social Security Administration.
Equal Employment Opportunity (EEO) Statement
Supio is committed to creating a diverse environment and is proud to be an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, gender, gender identity or expression, sexual orientation, national origin, genetics, disability, age, or veteran status.
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This role requires working 5 days/week from our downtown Seattle office. Does that work? *
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Req ID: R3
