CrawlJobs Logo

Founding Engineer (Full-Stack)

workatastartup.com Logo

YC Work at a Startup

Location Icon

Location:
United States , San Francisco

Category Icon
Category:
IT - Software Development

Job Type Icon

Contract Type:
Not provided

Salary Icon

Salary:

150000.00 - 200000.00 USD / Year
Save Job
Save Icon
Apply Position

Job Description:

Companies waste billions on bad ads, mismatched landing pages, and poor budget allocation. Uplane fixes this by replacing a patchwork of agencies, spreadsheets, and siloed tools with one self-improving AI system. It creates ads, builds matching landing pages, allocates budgets across different channels, and more. We are building the AI engine that will manage and spend the world's marketing budget.

Job Responsibility:

  • Full-Stack Development: Design, build, and maintain scalable applications using Node.js, TypeScript, and Nuxt (Vue)
  • System Architecture: Architect and manage robust database schemas with PostgreSQL and Supabase, ensuring data integrity and performance
  • Infrastructure & Operations: Manage deployments and background jobs using Render and Inngest, and assist in maintaining dedicated deployments on Microsoft Azure
  • Product Ownership: Own projects across the full lifecycle, including concept development, implementation, deployment, and ongoing maintenance
  • User-Centric Design: Apply sound product and design judgment to build user-centric software features aligned with current market and customer needs
  • Collaboration: Collaborate closely with the operations team and customers via Slack and Notion to ensure technical solutions are aligned with user requirements

Requirements:

  • Bachelor’s or Master’s degree in Computer Science or a related field, or equivalent practical experience
  • Minimum of 2 years full-time experience in software engineering, preferably in early-stage startups
  • Frontend Expertise: Proficiency in building responsive frontends using React/Next or Vue.js and the Nuxt framework
  • Backend Expertise: Strong backend development skills in TypeScript/Node.js and experience with PostgreSQL or relational databases
  • Strong creative judgment with a sense for marketing
  • Demonstrated ability to work independently
  • Based in or willing to relocate to San Francisco
  • on-site presence required (Visa sponsorship will be provided if needed)

Nice to have:

  • Experience with Language Models and AI/ML integrations (OpenAI, Anthropic, Google, etc.)
  • Familiarity with serverless workflows or event-driven architecture (e.g., Inngest)
  • Previous touchpoints with marketing or AdTech are a plus
What we offer:
  • Be one of the first employees at a well-funded startup
  • Solve a massive problem in a massive market
  • Take ownership and grow quickly
  • Culture: fast-moving, ambitious, fun, humble

Additional Information:

Job Posted:
January 07, 2026

Employment Type:
Fulltime
Work Type:
On-site work
Icon
YC Work at a Startup - All Job Offers
Job Link Share:
Copy Link Icon
Facebook Icon Twitter Icon LinkedIn Icon

Looking for more opportunities? Search for other job offers that match your skills and interests.

Briefcase Icon

Similar Jobs for Founding Engineer (Full-Stack)

Founding Full-Stack Software Engineer – AI for Biopharma

Founding Full-Stack Engineer role at Equator, an AI-native startup building next...
Location
Location
Spain , Barcelona
Salary
Salary:
70000.00 EUR / Year
bluselection.com Logo
Blu Selection
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • 4–6 years of software engineering experience (mid to senior level)
  • Strong backend engineering skills with Python
  • Proficiency in React, Next.js, TypeScript, Node.js
  • Experience building data-heavy or versioned backend systems
  • Strong clean-code discipline and architectural thinking
  • English (Advanced/C1+)
  • Valid Spain work permit (no sponsorship available)
Job Responsibility
Job Responsibility
  • Architect scalable, auditable backend systems (Python, PostgreSQL, modern frameworks)
  • Build APIs enabling seamless collaboration between humans and AI agents
  • Develop clean, modular frontend interfaces using React, Next.js, and TypeScript
  • Implement and maintain data-heavy systems and structured knowledge frameworks
  • Write clean, precise code and contribute to strong engineering standards
  • Collaborate closely with founders, designers, and early users to deliver impactful features
  • Influence product, technical direction, and architectural decisions as a founding engineer
What we offer
What we offer
  • Gym membership
  • Fulltime
Read More
Arrow Right

Founding DevOps Engineer

As a Founding Engineer with a DevOps focus, you will play a central role in buil...
Location
Location
France , Paris
Salary
Salary:
60000.00 - 80000.00 EUR / Year
bluselection.com Logo
Blu Selection
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Strong full-stack engineering background with a DevOps mindset
  • Hands-on expertise in cloud platforms (GCP ideal): deployments, infra, CI/CD
  • Proficient in TypeScript and Python
  • Experienced with React, Next.js, and FastAPI
  • Solid knowledge of PostgreSQL and Redis
  • Ability to design scalable systems and deliver production-grade code quickly
  • Comfortable using AI-assisted coding tools (Cursor, Claude Code, Copilot)
  • Thrives in fast-moving, ambiguous, 0→1 environments
  • Fluent in English (French is a plus)
Job Responsibility
Job Responsibility
  • Build fast, lightweight, and reliable front-end applications (React)
  • Develop backend services powering conversational and AI-driven experiences
  • Design and maintain scalable cloud infrastructure (preferably GCP)
  • Set up CI/CD pipelines, observability, monitoring, and infra-as-code
  • Optimize performance, reliability, and security across systems
  • Own core architectural decisions and enforce best engineering practices
  • Ensure code quality, stability, and scalability from the ground up
  • Collaborate closely with early users and customers to iterate quickly
  • Fulltime
Read More
Arrow Right

Founding iOS Engineer

Babylist is looking for a Senior iOS Engineer to join our newest venture—a stand...
Location
Location
United States , Needham
Salary
Salary:
180100.00 - 225082.00 USD / Year
babylist.com Logo
Babylist
Expiration Date
Until further notice
Flip Icon
Requirements
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
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
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
Read More
Arrow Right
New

Founding AI Engineer

Flint is defining the next generation of websites: ones that can constantly buil...
Location
Location
United States , San Francisco
Salary
Salary:
150000.00 - 250000.00 USD / Year
Flint
Expiration Date
Until further notice
Flip Icon
Requirements
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
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
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
Read More
Arrow Right
New

Founding Full-Stack Engineer

At Truth Systems, we’re building the only trust and safety software any organiza...
Location
Location
United States , San Francisco
Salary
Salary:
200000.00 - 250000.00 USD / Year
workatastartup.com Logo
YC Work at a Startup
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Taste and product building experience (must have)
  • React + backend + engineering hygiene (must have)
  • Deeply empathetic (must be)
  • Independent and process building (must be)
  • Endpoint/inference experience (nice to have)
  • 1+ years experience
  • US citizen/visa only
  • Skills: Next.js, Python, React, TypeScript
Job Responsibility
Job Responsibility
  • 0 → 1 roadmap delivery
  • Reliable, secure, accurate, and fast engineering
  • Talk to clients, scope and design features, and implement from scratch
  • Own a section of our roadmap and ship them from 0 → 1
What we offer
What we offer
  • Equity: 0.3-1%
  • Meals, housing/relocation, equipment, and benefits provided
  • Fulltime
Read More
Arrow Right
New

Founding Engineer (Full Stack Web)

Pax Historia is an alternate-history sandbox game where players choose a country...
Location
Location
United States , San Francisco
Salary
Salary:
150000.00 - 215000.00 USD / Year
workatastartup.com Logo
YC Work at a Startup
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Extremely comfortable with cross-functional full-stack development
  • Able to think through problems, create workable solutions, and debug complex code on your own
  • Experience using NextJS
  • Experience using Typescript
  • Experience using Firestore
  • Experience using Supabase
  • Experience using R2
  • US citizen/visa only
  • 1+ years experience
Job Responsibility
Job Responsibility
  • Help build and improve the customer experience of paxhistoria.co
  • Frequently help with other ad-hoc projects as needed
What we offer
What we offer
  • 0.25% - 1% equity
  • 12 month cliff and 4 year monthly vesting
  • Non-matching 401k plan
  • Fulltime
Read More
Arrow Right
New

Founding Engineer: Product-Focused Full-Stack Developer

You lean toward product, UX, and the user experience. You’ll build the interface...
Location
Location
Netherlands , Amsterdam
Salary
Salary:
75000.00 - 130000.00 EUR / Year
workatastartup.com Logo
YC Work at a Startup
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Can own features end-to-end and enjoy doing so
  • Ship fast and care about quality, clean architecture, solid tests, good UI
  • Resourceful and persistent, figure things out
  • Have built things you're proud of (products, open source, side projects)
  • Use AI tools daily and want to keep raising that bar
  • Think in systems and multipliers, not just tasks
Job Responsibility
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
  • Fulltime
Read More
Arrow Right
New

Senior Software Engineer

Arqit is a global cybersecurity company delivering quantum-safe encryption to se...
Location
Location
United Kingdom , Belfast
Salary
Salary:
Not provided
Arqit
Expiration Date
Until further notice
Flip Icon
Requirements
Requirements
  • Significant commercial experience of developing complex enterprise software and services
  • Demonstrable experience in building horizontally-scalable mission-critical enterprise software and services, preferably in a startup environment
  • Experience of cloud service development (public/hybrid/private cloud PaaS or SaaS)
  • Extensive experience of Python programming and best practice
  • Demonstrable passion for software development through self-learning, personal projects, competitions etc.
  • Experience of triage, RCA and fix for software issues within a distributed system
  • Competence in multiple programming languages
  • Experience of database development (SQL and NoSQL)
  • Experience with design patterns, refactoring, OO design and related areas
  • Strong analytical, problem-solving and organizational skills
Job Responsibility
Job Responsibility
  • Developing software for our Encryption Intelligence technology, working under the guidance of our software architects and other senior colleagues
  • Transforming architectural models into component designs ready to be incrementally developed, tested and deployed
  • Collaborating closely with our team of software, automation and DevOps engineers to implement, review, test and deploy full-stack software changes
  • Working extensively with Python, you will have the opportunity to train on Rust and AngularJS
  • Analysing the metrics of your deployment changes, ensuring high resiliency and performance is maintained, resolving issues if they arise
  • Fixing issues found internally and by our customers
  • Actively participating in Agile development activities and rituals, supporting the growth of the team and its members
  • Being open to receiving feedback and being willing to offer constructive feedback and support to others
  • Working closely with the Product Management team to help further refine requirements
What we offer
What we offer
  • 25 days paid holiday
  • 8 bank holidays
  • Pension
  • Private Medical Insurance
  • Life Insurance
  • Income Protection
  • Employee Assistance Programme
  • Coaching
  • Parental Leave
  • Personal Travel Insurance
  • Fulltime
Read More
Arrow Right
Jobs by Category
Art and Entertainment Jobs Banking Jobs Call Center Jobs Construction Jobs Consulting Jobs Customer Service Jobs Education Jobs Energy Jobs Finance Jobs Gastronomy Jobs Health and Beauty Jobs Hospitality and Tourism Jobs Human Resources Jobs Insurance Jobs IT - Administration Jobs IT - Software Development Jobs Legal Jobs Logistics Jobs Manufacturing Jobs Marketing, Digital Marketing, SEO, SEM Jobs Media Jobs Nursing Jobs Office Administration Jobs Pharmacy Jobs Physical Work Jobs Public Relations Jobs Public Sector Jobs Purchasing Jobs Quality Control Jobs Real Estate Jobs Research and Development Jobs Sales Jobs
Job Positions Jobs by Country
United States Jobs United Kingdom Jobs India Jobs Canada Jobs Australia Jobs Germany Jobs Ireland Jobs Poland Jobs
Company
Blog About Us Contact
Follow Us
Facebook
X (Twitter)
LinkedIn
Instagram
© 2026 CrawlJobs Ltd. All Rights Reserved
Terms & Conditions Privacy Policy