Senior Full Stack Software Engineer at Cynch AI | CA, US | Rezi

Senior Full Stack Software Engineer at Cynch AI

Senior Full Stack Software Engineer

Cynch AI · CA, US

2 days ago

Senior Full Stack Software Engineer

Cynch AI · CA, US

2 days ago
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About the Role

Cynch AI is seeking a senior software engineer to build neuro-symbolic AI applications for tax professionals. This role focuses on backend systems, data models, and execution engines, leveraging AI tooling to enhance engineering velocity and software quality.

Responsibilities

  • Own substantial product and platform work from problem definition through production rollout, collaborating with founders, product, AI, operations, and domain experts.
  • Build backend systems with clear APIs, well-modeled data, reliable execution, useful observability, and maintainable code.
  • Transform messy operational workflows into clean software abstractions, internal tools, automations, and customer-facing features.
  • Continuously identify areas where AI meaningfully improves software quality and velocity.
  • Improve the engineering system through better tools, patterns, deployment practices, observability, and reduced technical debt.
  • Mentor other engineers by enhancing design discussions, implementation choices, reviews, and production ownership.

Requirements

  • Experience building production software where correctness, performance, and reliability are critical.
  • Deep backend expertise with the ability to work across the full stack.
  • Direct responsibility for a production system with significant engineering complexity related to correctness, performance, reliability, or scale.
  • Experience designing data models, execution paths, background jobs, queues, retries, observability, and operational workflows for systems under production load and failure modes.
  • Experience building systems where the core challenge involved technical depth, such as workflow execution, rule evaluation, document processing, search/indexing, data pipelines, distributed jobs, DSL implementation, or correctness-sensitive automation.
  • Experience in an early-stage environment with evolving requirements and broad ownership.
  • Strong product judgment, shipping code that effectively solves problems.
  • Experience owning ambiguous, technically complex systems end-to-end, making architectural decisions, debugging production issues, and improving engineering standards.
  • Ability to lead projects, accept feedback, engage in thoughtful discussions, and deliver work.
  • Recent work experience should extend beyond marketing sites, simple CRUD applications, prompt wrappers, prototypes, or frontend-only product surfaces, focusing on building underlying systems for AI-assisted workflows.

Skills

  • TypeScript
  • Python
  • Julia
  • Java
  • Go
  • Datalog
  • Knowledge graphs
  • Ontologies
  • Neuro-symbolic AI
  • AWS EC2
  • AWS ECS
  • AWS RDS (postgres)
  • AWS Lambda
  • AWS S3
  • AWS Bedrock
  • AI tooling
  • Backend systems
  • Data modeling
  • Execution engines
  • Reliability
  • Observability
  • API design
  • Workflow automation
  • Document processing
  • Domain logic
  • Auditing
  • Integrations
  • Product development
  • System design
  • Debugging
  • Refactoring
  • Mentoring

Location

  • San Francisco
  • Remote

Work Type

  • Hybrid
  • Remote

Experience Level

  • Senior

Salary/Compensations

  • $190,000–$240,000

Benefits

  • Medical
  • Dental
  • Vision
  • Life
  • LTD
  • 401k (with match)

About the Company

  • Cynch AI is a Series A company that has grown revenue 4x in the past year.
  • We build neuro‑symbolic AI applications for our accounting firm, Aardvark Tax Advisors.
  • We are growing both organically and through strategic acquisitions.
  • We have a mix of remote and onsite employees and offices in San Francisco, the South Bay, and the East Bay.