Senior Fullstack Software Engineer (AI)

Location: Hybrid in San Francisco, California; remote work is available for exceptional candidates.

California base salary range: $190,000–$240,000 per year

Company

hirify.global is a Series A company building neuro-symbolic AI applications for its accounting firm, Aardvark Tax Advisors.

What you will do

• Own substantial product and platform work from problem definition through production rollout.
• Build backend systems with clear APIs, well-modeled data, reliable execution, observability, and maintainable code.
• Develop execution engines for AI-assisted tax workflows, document-processing pipelines, internal tools, automations, and customer-facing features.
• Build systems for tracing and auditing automated decisions and integrate with tax and accounting platforms.
• Improve engineering tools, patterns, deployment practices, observability, and technical debt management.
• Mentor engineers and raise the quality of design discussions, implementation, reviews, and production ownership.

Requirements

• Deep backend expertise with the ability to work across the stack, including frontend product experiences when needed.
• Direct ownership of production systems where correctness, performance, reliability, or scale created significant engineering complexity.
• Experience designing data models, execution paths, background jobs, queues, retries, observability, and operational workflows.
• Experience with technically deep systems such as workflow execution, rule evaluation, document processing, search and indexing, data pipelines, distributed jobs, domain-specific languages, or correctness-sensitive automation.
• Experience working in an early-stage environment with incomplete requirements, changing priorities, and broad ownership.
• Ability to make architecture decisions, debug production issues, lead projects, and own ambiguous systems end to end.

Nice to have

• Experience with data platforms, developer tools, workflow automation, compilers or languages, ML infrastructure, or enterprise SaaS platforms.
• Experience in fintech, tax and accounting software, or healthtech.
• Familiarity with TypeScript, Python, Julia, Java, Go, Datalog, knowledge graphs, ontologies, neuro-symbolic AI, or AWS services.

Culture & Benefits

• AI-assisted development is integrated into daily engineering workflows with high standards for correctness, maintainability, testing, and production quality.
• Medical, dental, vision, life, and long-term disability insurance.
• 401(k) with company match.
• Remote and onsite work options, with the primary hybrid setup based in San Francisco.

Hiring process

• Application requires a 4–8 sentence description of the most technically complex production system personally built or owned.
• The response should cover the data model, algorithms, scale, reliability constraints, failure modes, and personal ownership.