Key Talent Solutions
Senior Software Engineer (San Mateo)
Key Talent Solutions, San Mateo, California, United States, 94409
Job Title:
Senior Software Engineer (Full-Stack) Employment Type:
Full-time Salary:
$175K
$250K per annum Location:
San Francisco (Hybrid, 2 days/week) Start Date:
ASAP Visa:
No H1B sponsorship available
About Client: Our client is a Series A start up, growing quickly as they onboard new customers and scale platform, using AI to remake the way consumer underwriting is done, starting with residential real estate. Most consumers' most important financial information is locked up in documents, and weve built technology that is able to harness this data to help make better lending decisions. Weve coupled this underwriting agent with advanced document and identity anti-fraud, and were working toward democratizing sophisticated consumer underwriting for all.
About the Role Seeking a
Staff Software Engineer
with 78+ years of experience to lead the
re-architecture of our core platform
as we scale rapidly. After two years of fast-paced product development, our system has grown into a collection of disparate services, and we need a senior IC to
unify, rebuild, and streamline the foundation . This role reports directly to the CTO and plays a critical part in shaping the technical future of the company.
What Were Looking For 78+ years of professional experience as a strong
individual contributor . Deep expertise in systems design, architectural refactoring, and scaling codebases beyond the fast startup phase. Experience at a
high-growth startup
(Seed
Series B/C) where engineering teams expanded meaningfully. Strong full-stack or backend skills ( Typescript, React, Node.js, Python
preferred). Ability to navigate ambiguity, make sound technical decisions with incomplete context, and iterate quickly. High engineering barsomeone who can elevate the
code quality and system design
of the entire team. Tech Stack Frontend:
Typescript, React Backend:
Node.js, Python Databases:
Postgres, BigQuery, Redis Cloud:
GCP
Seniority & Experience 7+ years in full-stack software engineering (backend-leaning). Experience
leading technical projects , refactoring code, and re-architecting systems. History of
progression or promotions
within startup roles (e.g., to Staff/Principal level).
Education CS degree from a top 20 school
What Youll Do Architect & Rebuild the Core System Re-architect major parts of the existing platform into a cleaner, scalable, and more maintainable system. Refactor or remove unnecessary code to create a cohesive architecture. Drive high-level technical decisions across backend and full-stack systems. Establish and reinforce best practices and architectural consistency across the engineering team. Lead High-Impact Feature & Infrastructure Work Collaborate with the CTO to define long-term technical direction. Work with senior and junior engineers to implement new features and improve systems. Support onboarding of larger enterprise customers by enhancing platform stability and extensibility. Own Key Product Initiatives Lead system architecture for new workflows, including real-time ID, income, and document verification. Integrate and maintain in-house ML models used for fraud detection and financial document understanding. Improve the technical foundation powering our 70%+ automated approval/denial workflow.
Why Join This is a rare opportunity to join a
fast-scaling Series A company with real customers and traction . Youll act as the
technical adult in the room , refactoring, simplifying, and shaping the long-term architecture while influencing major product decisions. You will have a direct impact on the companys core systems and help define the foundation for future growth.
Senior Software Engineer (Full-Stack) Employment Type:
Full-time Salary:
$175K
$250K per annum Location:
San Francisco (Hybrid, 2 days/week) Start Date:
ASAP Visa:
No H1B sponsorship available
About Client: Our client is a Series A start up, growing quickly as they onboard new customers and scale platform, using AI to remake the way consumer underwriting is done, starting with residential real estate. Most consumers' most important financial information is locked up in documents, and weve built technology that is able to harness this data to help make better lending decisions. Weve coupled this underwriting agent with advanced document and identity anti-fraud, and were working toward democratizing sophisticated consumer underwriting for all.
About the Role Seeking a
Staff Software Engineer
with 78+ years of experience to lead the
re-architecture of our core platform
as we scale rapidly. After two years of fast-paced product development, our system has grown into a collection of disparate services, and we need a senior IC to
unify, rebuild, and streamline the foundation . This role reports directly to the CTO and plays a critical part in shaping the technical future of the company.
What Were Looking For 78+ years of professional experience as a strong
individual contributor . Deep expertise in systems design, architectural refactoring, and scaling codebases beyond the fast startup phase. Experience at a
high-growth startup
(Seed
Series B/C) where engineering teams expanded meaningfully. Strong full-stack or backend skills ( Typescript, React, Node.js, Python
preferred). Ability to navigate ambiguity, make sound technical decisions with incomplete context, and iterate quickly. High engineering barsomeone who can elevate the
code quality and system design
of the entire team. Tech Stack Frontend:
Typescript, React Backend:
Node.js, Python Databases:
Postgres, BigQuery, Redis Cloud:
GCP
Seniority & Experience 7+ years in full-stack software engineering (backend-leaning). Experience
leading technical projects , refactoring code, and re-architecting systems. History of
progression or promotions
within startup roles (e.g., to Staff/Principal level).
Education CS degree from a top 20 school
What Youll Do Architect & Rebuild the Core System Re-architect major parts of the existing platform into a cleaner, scalable, and more maintainable system. Refactor or remove unnecessary code to create a cohesive architecture. Drive high-level technical decisions across backend and full-stack systems. Establish and reinforce best practices and architectural consistency across the engineering team. Lead High-Impact Feature & Infrastructure Work Collaborate with the CTO to define long-term technical direction. Work with senior and junior engineers to implement new features and improve systems. Support onboarding of larger enterprise customers by enhancing platform stability and extensibility. Own Key Product Initiatives Lead system architecture for new workflows, including real-time ID, income, and document verification. Integrate and maintain in-house ML models used for fraud detection and financial document understanding. Improve the technical foundation powering our 70%+ automated approval/denial workflow.
Why Join This is a rare opportunity to join a
fast-scaling Series A company with real customers and traction . Youll act as the
technical adult in the room , refactoring, simplifying, and shaping the long-term architecture while influencing major product decisions. You will have a direct impact on the companys core systems and help define the foundation for future growth.