Founding Engineer (Full Stack Web) Job at YC Work at a Startup (San Francisco)

Founding iOS Engineer

Babylist is looking for a Senior iOS Engineer to join our newest venture—a stand...

Location

United States , Needham

Salary:

180100.00 - 225082.00 USD / Year

Babylist

Expiration Date

Until further notice

Requirements

Strong understanding of software development principles, capabilities, and limitations of the iOS platform
Well-versed in the intricacies of iOS development and can navigate its unique features and constraints
8+ years of proven experience in iOS app development using Swift
Comfortable working with Swift and SwiftUI and have a deep understanding of syntax, features, and best practices
Familiar with Foundation, SwiftUI, CoreAnimation and other foundational Apple frameworks and patterns
Hands-on experience with SwiftUI, Previews, and rapid prototyping
Passion for building consumer-facing products and moving quickly in the zero-to-one of a new product
Experience with AI-driven software development practices and tools
Solid understanding of the Android ecosystem, with direct Android development experience being a plus
Comfortable and enthusiastic about working in an AI-forward environment where AI tools are part of daily operations

Job Responsibility

Conceptualize, design and develop our new standalone iOS app, taking ownership of the entire development lifecycle
Develop features and functionality, ensuring a seamless and delightful user experience
Collaborate closely with your designer and product manager to translate requirements into technical specifications and user-friendly interfaces
Transform concepts and designs into intuitive and visually appealing iOS app interfaces
Collaborate closely with a full-stack web engineer to align on architecture, API design, and more
Write clean, efficient, and maintainable code following industry best practices and coding standards
Employ various testing techniques, write unit tests, and leverage debugging tools to identify and address any issues or bugs
Collaborate effectively with team members, actively participating in discussions and brainstorming sessions
Contribute to feature ideation, and providing insights to the team

What we offer

Competitive salary with equity and bonus opportunities
Company-paid medical, dental, and vision insurance
Retirement savings plan with company matching and flexible spending accounts
Generous paid parental leave and PTO
Remote work stipend to set up your office
Perks for physical, mental, and emotional health, parenting, childcare, and financial planning

Fulltime

Founding AI Engineer

Flint is defining the next generation of websites: ones that can constantly buil...

Location

United States , San Francisco

Salary:

150000.00 - 250000.00 USD / Year

Flint

Expiration Date

Until further notice

Requirements

You are a product-first engineer
You have built and deployed AI products that real users depend on
You have extensive hands-on experience with prompt engineering, context optimization, and model fine-tuning
You have strong full-stack engineering skills with experience integrating AI into web applications
You regularly use AI IDEs like Cursor or Windsurf to code
You take ownership of problems from start to finish and are eager to learn whatever you need to succeed
You’re comfortable in a fast-paced environment with evolving requirements
You have enthusiasm for building MVPs and iterating based on user feedback

Job Responsibility

Designing and implementing production-grade agentic systems that power web experiences and marketing workflows, leveraging advanced prompt engineering and multi-agent architectures to do so
Architecting and optimizing RAG (Retrieval-Augmented Generation) systems with context engineering
Strengthening our engineering processes through robust evals, observability, and testing
Developing and maintaining the core application across frontend, backend, and infrastructure
Shaping our technical vision and leading architectural discussions. You'll make foundational decisions that influence both Flint's technical architecture and engineering culture.
Creating and testing prototypes to gather rapid feedback from users

What we offer

Historic office in Jackson Square (with 2 rooftops and a shower)
A crazy upside-down battlestation
20 PTO days a year and full health benefits
Lunch and a fully stocked snack bar at the office, incl. Cometeer coffee pods
Dog friendly
Competitive salary + equity

Fulltime

New

Founding Engineer: Backend + AI-Focused Full-Stack Developer

We’re building autonomous AI agents that resolve customer support tickets for e-...

Location

United States , New York

Salary:

150000.00 - 250000.00 USD / Year

YC Work at a Startup

Expiration Date

Until further notice

Requirements

You can own features end-to-end and enjoy doing so
You ship fast and care about quality, clean architecture, solid tests, good UI
You’re resourceful and persistent, you figure things out
You’ve built things you’re proud of (products, open source, side projects)
You use AI tools daily and want to keep raising that bar
You think in systems and multipliers, not just tasks
Skills: Next.js, Python, React, TypeScript, Amazon Web Services (AWS)
Backend: Python, FastAPI, AWS
Frontend: TypeScript, React, Next.js

Job Responsibility

Ship production features across the stack
Work in tight loops: build → test → measure → refine
Use AI tools daily (Cursor, Claude, etc.) and push them further
automate glue work, generate scaffolds, build evals, multiply your own output
Take ownership of outcomes, not tickets
Build the agent runtime, evals, and integration layer that let us scale

What we offer

0.50% - 2.25% equity

Fulltime

New

Founding Engineer: Product-Focused Full-Stack Developer

We’re building autonomous AI agents that resolve customer support tickets for e-...

Location

United States , New York

Salary:

150000.00 - 250000.00 USD / Year

YC Work at a Startup

Expiration Date

Until further notice

Requirements

Can own features end-to-end and enjoy doing so
Ships fast and cares about quality, clean architecture, solid tests, good UI
Is resourceful and persistent, figures things out
Has built things they're proud of (products, open source, side projects)
Uses AI tools daily and wants to keep raising that bar
Thinks in systems and multipliers, not just tasks
Skills: Next.js, Python, React, TypeScript, Amazon Web Services (AWS)

Job Responsibility

Ship production features across the stack
Work in tight loops: build → test → measure → refine
Use AI tools daily (Cursor, Claude, etc.) and push them further
automate glue work, generate scaffolds, build evals, multiply your own output
Take ownership of outcomes, not tickets
Build the interfaces and workflows that make self-serve setup actually work
Talk to users to figure out what's missing

What we offer

0.50% - 2.25% equity

Fulltime

New

Associate Quality Control

The Associate in Sample Management and Stability is responsible for the receipt,...

Location

United States , Holly Springs

Salary:

66222.00 - 82012.00 USD / Year

Amgen

Expiration Date

Until further notice

Requirements

High school diploma / GED and 2 years of Quality, Analytical Testing, or GxP Computerized System validation experience
Associate’s degree and 6 months of Quality, Analytical Testing, or GxP Computerized System validation experience
Bachelor’s degree

Job Responsibility

Receive and log incoming samples into the Laboratory Information Management System (LIMS)
Ensure proper labeling, storage, and chain-of-custody documentation for all samples
Coordinate sample distribution to appropriate testing labs and personnel
Maintain sample inventory and ensure timely disposal of expired or completed samples
Support investigations related to sample discrepancies or deviations
Assist in maintaining sample storage areas in compliance with safety and regulatory standards
Participate in audits and inspections by providing sample traceability documentation
Collaborate with cross-functional teams to improve sample handling processes
Follow SOPs and contribute to their periodic review and updates
Perform data entry and generate reports related to sample management activities

What we offer

competitive and comprehensive Total Rewards Plans that are aligned with local industry standards

Fulltime

New

Dental Assisting Instructor

Join our faculty at American Career College and discover an innovative learning ...

Location

United States , Ontario

Salary:

28.53 - 38.51 USD / Hour

American Career College

Expiration Date

Until further notice

Requirements

Two (2) years of occupational (i.e., practical) experience in the subject field in which they teach
or Three (3) years of occupational (i.e., practical) experience in the subject field in which they teach (if candidate does not meet education requirement)
High School Graduate or equivalent
Must be a graduate from a program accredited by an agency recognized by the U.S. Secretary of Education or the Council for Higher Education Accreditation (CHEA) in the specialty field or the subject area in which they teach
Must hold a valid, active, current license as a Registered Dental Assistant (RDA)/ Certified Dental Assistant (CDA) and have been licensed for a minimum of two (2) years
Must possess a Certificate of Completion of a course in teaching methodology of at least 30 hours or must be obtained within six (6) months of hire
Current CPR Card

Job Responsibility

Employing appropriate instructional methods and learning strategies to communicate subject matter to students and modifying where appropriate to meet diverse students’ needs
Preparing outlines of instructional programs and training schedules according to established course objectives
Observing and evaluating students' work to determine progress, provides feedback, and makes suggestions for improvement
Encouraging the development of communication skills and higher order thinking skills through appropriate assignments
Presenting lectures and conducting discussions to increase students' knowledge and competence, using visual aids such as graphs, charts, videotapes, and slides
Supervising independent or group projects, field placements, laboratory work, or other training, as necessary
Providing individualized tutorial and/or remedial instruction
Conducting simulated on-the-job training, classes, or training sessions to teach and demonstrate principles, techniques, procedures, and/or methods of designated subjects
Posting and maintaining regular office hours to ensure accessibility to students for advisement and consultation
Participating in graduation ceremonies

What we offer

HEALTHCARE
401(K) RETIREMENT PLANS AND EMPLOYER MATCHING
PROFESSIONAL DEVELOPMENT
DAY OF SERVICE
PTO DAY
COLLABORATION
MANAGEMENT AWARDS & RECOGNITION

Parttime

New

Respiratory Therapy Instructor

Join our faculty at American Career College and discover an innovative learning ...

Location

United States , Ontario

Salary:

70153.30 - 101733.10 USD / Year

American Career College

Expiration Date

Until further notice

Requirements

Three (3) years of occupational (i.e. practical) experience in the subject field in which they teach
At least an associate degree with the appropriate coursework in the subject required
Must be a graduate from a program accredited by an agency recognized by the U.S. Secretary of Education or the Council for Higher Education Accreditation (CHEA) in the specialty field or the subject area in which they teach
Current Registered Respiratory Therapist (RRT) license to practice in California
Current CPR Card

Job Responsibility

Delivering class and/or clinical instruction according to an approved course syllabus using accepted and effective teaching methods
Developing daily lesson plan
Advising and tutoring students
Maintaining current and accurate attendance and grade records
Remaining current in applicable program teaching field
Participating in faculty meetings, professional growth activities in the respective field and two (2) in-service training sessions annually
Participating in college activities such as in-services, faculty meetings, student functions, graduation exercises, open houses, new student orientations, and advisory board meetings
Striving for student success by providing quality instruction that results in students’ achievement of course and program objectives, retention of students, and prepares students for entry-level positions in the healthcare field

What we offer

Healthcare
401(K) Retirement Plans and Employer Matching
Professional Development
Day of Service
PTO Day
Collaboration
Management Awards & Recognition

Fulltime

New

Retail to Business Account Executive

Responsible for the sale of integrated communication structure to small-to-mediu...

Location

United States , Washington

Salary:

45000.00 - 75000.00 USD / Year

Comcast Corporation

Expiration Date

Until further notice

Requirements

Bachelor's Degree
0-2 Years Relevant Work Experience
Customer-Focused
Workplace Organization
Persuasion
Technical Knowledge
Adaptability
Resilience
Critical Thinking Problem Solving
Communication

Job Responsibility

Assists with the creation and delivery of face-to-face sales presentations
Promotes the sale of bundled products
Stays abreast of competitive landscape and emerging technologies
Generates new leads through various prospecting activities
Assists with developing sales territory
Retains customer base by delivering on the Comcast Credo
Prepares sales and activity reports
Participates in out-of-the-office meetings with customers
Must be able to work nights and weekends, variable schedule(s) and overtime as necessary

What we offer

Paid Time off
Physical Wellbeing benefits
Financial Wellbeing benefits
Emotional Wellbeing benefits
Life Events + Family Support benefits

Fulltime

Founding Engineer (Full Stack Web)

YC Work at a Startup

Location:
United States , San Francisco

Category:
IT - Software Development

Contract Type:
Employment contract

Salary:

Job Description:

Job Responsibility:

Requirements:

Nice to have:

Additional Information:

Job Posted:
January 07, 2026

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