Founding Software Engineer - Backend

Hypercubic
San Francisco
Workplace: OnsiteFull timeUSD 125,000 - 300,000 annuallyFunction: Software EngineeringSkills: ["Engineering taste","Systems thinking","Bias for action","Comfort with uncertainty","Cross-level problem solving"]

Build AI-powered systems to understand, reason about, and rearchitect large-scale legacy applications for mission-critical enterprise infrastructure. Work directly with the CTO in a founding role with ownership of architecture, product direction, and engineering culture. Rapidly prototype concepts, ship AI-driven features end to end, and set early standards for testing, reliability, and code quality while translating ambiguous problems into working experiments.

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FursaFursa
Hypercubic
Hypercubic
3 days ago

Founding Software Engineer - Backend

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI
Last checked: 19 hours agoStatus: Live

Job Summary

Build AI-powered systems to understand, reason about, and rearchitect large-scale legacy applications for mission-critical enterprise infrastructure. Work directly with the CTO in a founding role with ownership of architecture, product direction, and engineering culture. Rapidly prototype concepts, ship AI-driven features end to end, and set early standards for testing, reliability, and code quality while translating ambiguous problems into working experiments.
Location: San Francisco
Workplace: Onsite
Employment Type: Full time
Job Function: Software Engineering
Seniority: Entry level

Key Responsibilities

  • •Rapidly prototype new concepts and features to validate ideas before full implementation.
  • •Ship AI-driven backend features end to end, from model interaction to user-facing workflows.
  • •Set early engineering standards around testing, reliability, and code quality.
  • •Translate ambiguous problem statements into concrete experiments, constraints, and working systems.
  • •Lead architecture decisions and long-term technical direction with the CTO.

Pay and Benefits

Salary: USD 125,000 - 300,000 annually
Equity and Bonus:Equity
Perks:Health InsuranceDentalVisionPaid LeaveRelocation

Key Requirements

  • •Prototype and validate AI/backend concepts quickly before full implementation.
  • •Ship AI-driven features end to end, from model interaction through user-facing workflows.
  • •Translate ambiguous problem statements into concrete experiments, constraints, and working systems.
  • •Demonstrate strong testing intuition (e.g., TDD and property-based testing).
  • •Have experience with complex agentic products or infrastructure, ideally with legacy systems (mainframes/COBOL), compilers, program analysis, or HPC.
Experience:Agentic systemsLegacy systemsEnterprise softwareMainframesHigh-performance computing (HPC)
Skills:Engineering tasteSystems thinkingBias for actionComfort with uncertaintyCross-level problem solving
Tech Stack:COBOLMainframesProgram analysisCompilersTDDProperty-based testingHPCAgentic systemsKnowledge extraction

Eligibility

Visa:H1B

Company Brief

Hypercubic
Develops infrastructure and tooling to simplify building, fine-tuning, and deploying large AI models and applications, focusing on performance, scalability, and developer experience for production AI workloads.
Industry: Developer Tools
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