Software Engineer, Backend/Applied ML (Safety & Integrity)

Character.ai
Redwood City
Workplace: OnsiteFull timeUSD 150,000 - 300,000 annuallyFunction: Software EngineeringExperience: 8+ yearsEducation: bachelorsSkills: ["Python","Go","Java","C++","Machine learning","Distributed systems","Backend engineering"]

Engineer and scale robust backend systems for safety and integrity, applying applied machine learning to tackle Generative AI safety challenges. You will design and lead backend solutions, mentor teammates, and drive the technical roadmap to enhance trust and safety across the platform.

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FursaFursa
Character.ai
Character.ai
8 months ago

Software Engineer, Backend/Applied ML (Safety & Integrity)

✓ Verified Job

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

Source: Company careers pageValidated by: Fursa AI
Last checked: 15 hours agoStatus: Live

Job Summary

Engineer and scale robust backend systems for safety and integrity, applying applied machine learning to tackle Generative AI safety challenges. You will design and lead backend solutions, mentor teammates, and drive the technical roadmap to enhance trust and safety across the platform.
Location: Redwood City
Workplace: Onsite
Employment Type: Full time
Job Function: Software Engineering
Seniority: Director level

Key Responsibilities

  • •Architect, build, and maintain highly scalable backend systems that power our integrity and safety features.
  • •Lead the technical design and implementation of sophisticated backend solutions for detecting, preventing, and mitigating integrity risks, including Generative AI threats.
  • •Apply machine learning to address complex integrity challenges, including content classification, anomaly detection, and behavior analysis.
  • •Collaborate with product managers, data scientists, AI researchers, security teams, and operations to define requirements and deliver impactful integrity systems.
  • •Drive the long-term technical vision and roadmap for backend integrity systems and applied ML capabilities.

Pay and Benefits

Salary: USD 150,000 - 300,000 annually
Equity and Bonus:Equity

Key Requirements

  • •8+ years of professional software engineering experience with a strong emphasis on backend systems development.
  • •Bachelor's, Master's, or PhD degree in Computer Science, Engineering, or a related technical field.
  • •Proven track record of designing, building, and operating complex, large-scale distributed systems.
  • •Expertise in one or more backend programming languages such as Python, Go, Java, or C++.
  • •Hands-on experience applying machine learning techniques to solve real-world problems, specifically with demonstrable experience in addressing integrity, trust, or safety challenges.
Experience:8+ yearsTrust & safetyGenerative AIDistributed systems
Education:Bachelor's
Skills:PythonGoJavaC++Machine learningDistributed systemsBackend engineering
Languages:English
Tech Stack:PythonGoJavaC++Distributed systemsMachine learning

Company Brief

Character.ai
Builds a conversational AI platform where users create and interact with lifelike AI characters for entertainment, learning, and productivity, backed by advanced large‑language‑model research and consumer-facing products.
Industry: AI & Machine Learning
Company Size: Medium (51 to 250 employees)
Growth: Scaleup
Valuation: Unicorn (USD 1B+)
Funding: Series A
Headquarters: Menlo Park, United States
Founded: 2021
Glassdoor
Glassdoor: 3.6
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