---
title: 'Senior AI Builder at Replit'
canonical: 'https://feeny.ai/job/senior-ai-builder-replit-foster-city-dsfvv6m0w0c8'
type: 'job'
last_seen: '2026-09-08'
---

# Senior AI Builder at Replit

- **Company:** [Replit](https://feeny.ai/companies/replit)
- **Location:** Foster City, CA
- **Employment:** full-time
- **Work type:** hybrid
- **Posted:** 2026-07-17
- **Last confirmed live:** 2026-09-08
- **Apply:** https://jobs.ashbyhq.com/replit/b333118f-965a-4d94-9557-88aa76779e9a

## Job description

Replit is the agentic software creation platform that enables anyone to build applications using natural language. With millions of users worldwide, Replit is democratizing software development by removing traditional barriers to application creation.

The AI Studio is the team responsible for designing, building, and operationalizing internal software platforms across every functional department of the company, including People Operations, Customer Support, Sales, Marketing, Finance, Recruiting, and Executive Operations. We treat each internal department as its own product surface, and in truth as its own startup, with its own customers, its own metrics, and its own reasons for existing. We ship custom software, built on Replit’s own platform, to solve operational problems that off-the-shelf SaaS tools cannot serve well at our scale and pace of growth.

## POSITION SUMMARY

The Member of Technical Staff (AI Builder) is a full-time builder role with substantial autonomy. You will design, architect, and ship AI-powered internal platforms that run the operations of the company across many departments at once. This is not a role for someone who wants a narrow, well-defined lane. It is a role for someone who wants to walk into an ambiguous business problem, understand it well enough to argue about it with the department lead, and then ship the software that fixes it.

We are looking for people who genuinely understand the mechanics of a business: how revenue is actually made, why recruiting velocity matters, what makes support scale or break, how finance closes a month, and why each department is critical to whether the company wins or loses. You do not need to have run every function, but you need to respect why each one exists and be able to reason about it like an operator, not just an engineer.

Because we treat each department as its own startup, we strongly favor people who have either run their own business or worked on a fast-scaling startup. You know what it feels like to build with incomplete information, to ship before it is comfortable, and to own an outcome rather than a ticket. The work is genuinely a ton of fun, and it is also demanding: it rewards diplomacy, creativity, technical depth, and business acumen in roughly equal measure. You will move fast, work long hours when it matters, and switch fluidly between a deep technical conversation and a conversation with a non-technical stakeholder who just needs their problem solved.

## KEY RESPONSIBILITIES

## INTERNAL PLATFORM DESIGN AND ENGINEERING

- Design, architect, and ship custom AI-powered internal platforms that serve specific operational needs across Replit’s functional departments, including but not limited to People Operations, Customer Support, Sales, Recruiting, Marketing, Finance, and Executive Operations.
- Translate ambiguous, often non-technical business requirements into technical specifications, system architectures, and shipped software products.
- Own platform development end-to-end, including front-end interfaces, back-end services, data models, third-party integrations, and AI model orchestration.

Applied AI and Large Language Model Engineering

- Architect multi-stage AI pipelines incorporating large language models, including prompt engineering, tool-call architecture, structured output generation, retrieval-augmented generation, and agentic workflows.
- Conduct model selection across multiple frontier and open-source providers, evaluating models against cost per query, latency, output quality, reliability, and task-specific performance.
- Design and implement evaluation frameworks for AI features, including test datasets, scoring rubrics, and regression tests, so that AI-driven workflows stay reliable in production.
- Optimize AI systems for cost and performance, including the appropriate use of lighter-weight models for qualification passes, batching strategies for high-throughput workloads, and caching architectures.

Business Understanding and Stakeholder Partnership

- Treat each internal department as its own startup: understand its goals, its constraints, and the metrics that define whether it is succeeding.
- Partner directly with department leads to identify operational inefficiencies, scope solutions, and prioritize the work that creates the most leverage.
- Conduct stakeholder interviews, lead requirements-gathering sessions, and translate qualitative feedback into iterative product improvements.
- Present technical work and operational outcomes to executive leadership, including the President and senior staff, and do it in language each audience can act on.

Third-Party System Integration

- Design and implement integrations with the third-party platforms used at Replit, including enterprise HR platforms, support ticketing systems, CRM platforms, applicant tracking systems, project management tools, and identity providers.
- Evaluate third-party APIs, SDKs, and data schemas, and design integration architectures appropriate to scale, security, and maintainability requirements.

Production Operations and Reliability

- Maintain and operate shipped platforms in production, including dependency management, security updates, observability, error handling, and performance monitoring.
- Respond to production incidents and continuously iterate on shipped platforms based on user feedback and operational telemetry.

Documentation and Knowledge Transfer

- Document architectural decisions, system designs, and operational procedures for shipped platforms.
- Onboard future team members and contribute to the evolution of the AI Studio as the function scales.

## WHO YOU ARE

- You understand how a business actually works and can explain why each department matters to the company winning.
- You have either run your own business or worked on a fast-scaling startup, and you carry the ownership instinct that comes with it.
- You are comfortable with long hours and a very high pace, and you treat that as part of the fun rather than a cost.
- You can engage credibly with both deeply technical people and non-technical stakeholders, often in the same afternoon.
- You bring diplomacy, creativity, technical knowledge, and business acumen, and you know when each one is the tool the moment calls for.
- You would rather ship something real and iterate than wait for perfect information.

## EXPERIENCE AND QUALIFICATIONS

- Bachelor’s or master’s degree in Technology Management, Computer Science, Software Engineering, Information Systems, or a closely related technical or technology-business hybrid field. Equivalent foreign degrees acceptable subject to credential evaluation. Exceptional non-traditional backgrounds with a strong shipped portfolio will be considered.
- A demonstrated portfolio of shipped software products, including AI-powered applications, and the ability to discuss technical architecture, design trade-offs, and engineering decisions in detail.
- Experience either running your own business or working at a fast-scaling startup, with real exposure to how the business operated end-to-end.
- Working proficiency in modern software engineering practices, including version control, code review, deployment pipelines, and production debugging.
- Hands-on experience with one or more large language model providers and their APIs, tool-calling interfaces, and structured output mechanisms.
- Demonstrated experience designing prompt and tool-call architectures, conducting model selection across providers, and optimizing AI systems for cost and latency.
- Programming proficiency in Python and TypeScript or JavaScript, including familiarity with relevant frameworks for AI application development.
- Experience with relational databases, SQL, and modern data tooling.
- Strong written and verbal communication skills, including the ability to present technical work to non-technical stakeholders.
- Demonstrated ability to operate with autonomy in ambiguous, fast-moving environments.

## PREFERRED QUALIFICATIONS

- Prior experience as a founder, co-founder, or early team member at a venture-backed startup, particularly one with an AI-native product.
- Prior experience in technology investment analysis or operational consulting, with a demonstrated ability to evaluate business operations and identify high-leverage interventions.
- Hands-on experience building on the Replit platform, including familiarity with Replit Agent and Replit Deployments.
- Experience designing and shipping internal tools at a high-growth technology company.
- Multilingual proficiency, particularly in languages relevant to Replit’s international customer base, including Italian, Portuguese, Spanish, or other major commercial languages.
- Experience with mobile application development frameworks, including React Native and Expo.

## TRAVEL AND LOCATION REQUIREMENTS

This position is based in Foster City, California. The company operates on a hybrid in-person schedule, with employees expected to be in-office Monday, Wednesday, and Friday in Foster City. Occasional domestic travel may be required for company offsites and customer engagements.

Full-Time Employee Benefits Include:

💰 Competitive Salary & Equity

💹 401(k) Program with a 4% match (US Only)

⚕️ Health, Dental, Vision and Life Insurance

🩼 Short Term and Long Term Disability

🚼 Paid Parental, Medical, Caregiver Leave

🏝 Flexible Time Off (FTO) + Holidays

🚗 Commuter Benefits (In-Office & US Only)

📱 Monthly Wellness Stipend

🧑‍💻 Autonomous Work Environment

🖥 In Office Set-Up Reimbursement (In-Office Only)

🚀 Quarterly Team Gatherings

☕ In Office Amenities (In-Office Only)

Want to learn more about what we are up to?

- Self-driving Company https://replit.com/blog/self-driving-company
- Replit Agent at Scale https://replit.com/blog/evaluating-and-improving-agent-at-scale
- AI Adoption https://replit.com/blog/ai-adoption
- Build Open-Source Apps https://replit.com/build/open-source-app-builder

Interviewing + Culture at Replit

- Operating Principles https://blog.replit.com/operating-principles
- Reasons not to work at Replit https://blog.replit.com/reasons-not-to-join-replit

To achieve our mission of making programming more accessible around the world, we need our team to be representative of the world. We welcome your unique perspective and experiences in shaping this product. We encourage people from all kinds of backgrounds to apply, including and especially candidates from underrepresented and non-traditional backgrounds.

## About Replit

## Company Overview
- **One-liner**: Replit is an agentic creation platform that enables anyone to turn ideas into real, working software using AI-powered tools, a collaborative browser-based IDE, and full-stack infrastructure.
- **Entity Type**: Private (Series D)
- **Headquarters**: Foster City, California, United States
- **Founded**: 2016
- **Founders**: Amjad Masad, Haya Odeh, Faris Masad

## Core Business
- Primary industry/industries: Developer Tools, AI-Powered Software Development, Cloud-Based IDE
- Target customers: Individual developers, learners, non-programmers, enterprise teams (B2B, B2C)
- Mission or purpose statement: To empower one billion creators by making software creation more accessible, immediate, and real, regardless of technical background.

## Products & Services
- **Replit Agent (Agent 4)**: An AI agent that writes production-ready code, evolves it, and handles the coordination and execution of building apps. Users describe and publish projects using natural language.
- **Collaborative IDE**: A browser-based, full-stack integrated development environment that allows real-time coding and collaboration, with no local setup required.
- **Replit Platform (Core)**: A full-stack cloud solution including built-in services for Authentication, Database, Hosting, and Monitoring, enabling scalable app development from day one.
- **Integrations**: Connects to 100+ services and APIs, including OpenAI, Stripe, and Google Workspace.
- **Enterprise Controls**: Features include SSO/SAML, SOC 2 compliance, admin controls, and secure screening services.

## Market Standing
- **Valuation/Market Cap**: Not publicly disclosed (Series D)
- **Key Metric**: Total Funding of $872M raised (as of latest Series D); over 50 million users on the platform.
- **Notable Investors/Partners**: Not detailed in search results, but the company is well-funded at the Series D stage with a strong investor base.
- **Growth Signals**: Over 50 million creators on the platform; rapid adoption of AI Agent capabilities; expansion into enterprise with Forward Deployed Engineering; active hiring across 28+ open roles as of mid-2026.

## Competitive Advantages
- **Agentic Creation**: The "Agent 4" feature allows non-programmers to build and ship software through natural language, radically lowering the barrier to entry.
- **All-in-One Platform**: Combines IDE, AI, hosting, database, authentication, and monitoring in a single, browser-based environment, eliminating setup friction.
- **Full-Stack Infrastructure**: Offers scalable services (Auth, DB, Hosting) that work out of the box, enabling rapid prototyping and deployment without DevOps overhead.
- **Massive User Base**: 50M+ creators provide a strong network effect and a rich ecosystem for learning and sharing.

## Strategic Focus
- **Democratizing Software Creation**: Focus on making software creation as intuitive as using a smartphone, targeting the "next billion creators" beyond traditional developers.
- **AI-Native Development**: Prioritizing AI agents (Agent 4) that handle complex coding and coordination, allowing humans to focus on ideas and planning.
- **Enterprise Adoption**: Building enterprise-grade security (SOC 2, SSO) and dedicated Forward Deployed Engineering teams to capture business customers.
- **Platform Ecosystem**: Expanding integrations and third-party services to make the platform a central hub for all software creation needs.

## Why Work Here
- **Culture**: Described as a place for "builders who care about craft, speed, and making things that matter." The company values "ideas first. Proof matters. Momentum wins."
- **Work Style**: "In person, on purpose." Replit emphasizes working from its HQ in Foster City, believing that proximity accelerates decisions and improves work quality. It operates a hybrid model with a strong in-office expectation.
- **Compensation & Benefits**:
    - Competitive salary, equity, and performance bonus
    - Health, dental, and vision insurance with HSA contributions ($2k individual / $4k family)
    - 24 weeks paid birth-parent leave; 12 weeks paid bonding and family care leave
    - 401K with company matching
    - $1,000 annual learning & development reimbursement
    - Monthly wellness stipend, commuter benefits, and in-office meals (breakfast, lunch, dinner)
    - Flexible time off and paid sick leave
- **Engineering Culture**: Strong emphasis on building resilient, scalable systems (Kubernetes, GCP). Roles like Staff Infrastructure Engineer and GRC Engineer indicate a mature, security-conscious engineering environment.

## Sources
1. [replit.com/careers](https://replit.com/careers)
2. [replit.com/about](https://replit.com/about)
3. [replit.com](https://replit.com/)
4. [tryjeremy.com/companies/replit](https://tryjeremy.com/companies/replit)
5. [jobs.ashbyhq.com/replit](https://jobs.ashbyhq.com/replit)

## Other roles at Replit

- [Cohort 0](https://feeny.ai/job/cohort-0-replit-foster-city-9qgx2vpykne6) — Foster City, CA
- [Learning Experiences Creator](https://feeny.ai/job/learning-experiences-creator-replit-foster-city-j76ttn67ggbm) — Foster City, CA
- [AI Agent Security Architect](https://feeny.ai/job/ai-agent-security-architect-replit-foster-city-kmf659p8tp4j) — Foster City, CA
- [Legal Operations Manager](https://feeny.ai/job/legal-operations-manager-replit-foster-city-vvmg0ffrmhrs) — Foster City, CA
- [Mid-Market Account Manager](https://feeny.ai/job/mid-market-account-manager-replit-foster-city-wkhdp50frw73) — Foster City, CA
- [Support Systems Lead (NYC)](https://feeny.ai/job/support-systems-lead-nyc-replit-new-york-jww52bg2br8x) — New York, NY
- [Support Systems Lead (Foster City)](https://feeny.ai/job/support-systems-lead-foster-city-replit-foster-city-ve93df5afrc9) — Foster City, CA
- [Director of Product Design](https://feeny.ai/job/director-of-product-design-replit-foster-city-rzhv29ay6b1q) — Foster City, CA
- [Forward Deployed Engineer](https://feeny.ai/job/forward-deployed-engineer-replit-foster-city-sjfk5dgczbg7) — Foster City, CA
- [Director of Compensation Strategy](https://feeny.ai/job/director-of-compensation-strategy-replit-foster-city-dr2wq26g194b) — Foster City, CA