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

Founding Application Engineer

geCKo Materials is looking for an Application Engineer to join our growing team....

Location

United States

Salary:

Not provided

geCKo Materials

Expiration Date

Until further notice

Requirements

Excellent communication and people skills
Highly competent in producing technical documents and managing information
Proficient with CAD
Proven skills with mechanical assemblies
Prototyping proficiency, to include tools such as CNC machines, laser cutter, 3D printers, etc.
Experienced with designing and building electromechanical systems
Meticulous attention to detail
Highly organized
Bachelor's degree (or equivalent experience) in Engineering related discipline and 5+ years of related experience or Master's Degree with 4+ years of related experience.

Job Responsibility

Interact with customers and research collaborators
Manage information systems, to include customer database and communications
Work cross-functionally with manufacturing and application engineers
Provide recommendations on design and manufacturing procedures leading to new product launches
Design, build, and implement custom fixtures, tools, and test machines
Develop fabrication processes in accordance with DFM / DFA
Conduct detailed research and record findings
Create and maintain relevant technical documentation
Demonstrate excellent time management skills for on-time delivery of assignments
Take ownership of and manage projects as assigned

What we offer

Health
Vision
Dental
401k
Paid volunteering opportunities

Founding Support Engineer

Reducto helps AI teams ingest real world enterprise data with state of the art a...

Location

Salary:

Not provided

Reducto

Expiration Date

Until further notice

Requirements

Communicate clearly and empathetically with developers and non-technical users
Are excellent at systematic debugging (HTTP, JSON, auth, retries, idempotency, webhooks)
Are comfortable reading/writing code (Python or TypeScript preferred) to create minimal repros
Have strong product sense: you don't just fix symptoms — you propose changes that eliminate whole classes of issues
Thrive in a high-ownership, early-stage environment and bias toward action

Job Responsibility

Be the front line for developers using Reducto's API — triage, reproduce, and resolve issues across auth, webhooks, rate limits, schema/field extraction, and SDKs
Own the debugging loop end-to-end — capture great repros, dig through logs/metrics, file crisp bug reports, and drive fixes across Engineering
Build durable support processes — write playbooks, macros, and self-serve docs
instrument queues and SLAs
tighten feedback loops so issues don't repeat
Use AI to move faster — summarize long logs, cluster similar tickets, propose replies, and draft docs
measure where AI assists actually reduce time-to-resolution
Champion the developer experience — spot rough edges in our API, docs, and tooling
partner with Engineering and Product on roadmap fixes and quality-of-life improvements

What we offer

Unlimited PTO
Lunch: Receive a free lunch to eat with your teammates daily at the office
Reimbursed Transportation: Provide us with your receipts and we’ll take care of the costs
Insurance: Generous health insurance covering medical, dental, and vision
Health and Wellness Budget: We provide up to $150/mo reimbursement for health and wellness spending, such as gym memberships, fitness classes, or similar
Parental Leave: Work with us to build a leave schedule that works for you and your family

Fulltime

Founding Security Engineer

Reducto helps AI teams ingest real world enterprise data with state of the art a...

Location

United States , San Francisco

Salary:

150000.00 - 300000.00 USD / Year

Reducto

Expiration Date

Until further notice

Requirements

Philosophy: You are your own worst critic. You have a high bar for quality and don't rest until the job is done right—no settling for 90%. We want someone who ships fast, with high agency, and who doesn't just voice problems but actively jumps in to fix them
Experience: You have 3+ years of hands-on security engineering experience, ideally in high-growth startups or cloud-native environments. You've been through at least one SOC2 or similar compliance audit
Technical Depth: You're comfortable reading and auditing code (Python strongly preferred), understanding infrastructure architecture, and implementing security controls across the stack—from application layer to cloud infrastructure
Tools: Build your own tools as needed—whether it's a quick script to audit secrets across repos or an internal dashboard to track security metrics
Approach: A practical, risk-based approach to security. You understand when to say no and when to help engineering ship securely. You can balance security rigor with business velocity and aren't dogmatic about perfect security at the expense of progress

Job Responsibility

Owning and managing SOC2, HIPAA, and other compliance certifications end-to-end, including evidence collection, control implementation, and audit coordination
Implementing proactive security monitoring and alerting systems to detect and respond to threats in real-time across our cloud and on-prem deployments
Building and maintaining security CI/CD tooling to catch vulnerabilities before they reach production—static analysis, dependency scanning, secrets detection, and more
Managing our relationship with platforms like Vanta to streamline compliance workflows and maintain continuous monitoring
Responding to customer security questionnaires and conducting security reviews for enterprise deals
Establishing and managing our bug bounty program, triaging vulnerabilities, and coordinating remediation with engineering teams
Working directly with the founders and customers to shape our security strategy and build trust with enterprise buyers

What we offer

Unlimited PTO
Lunch: Receive a free lunch to eat with your teammates daily at the office
Reimbursed Transportation: Provide us with your receipts and we'll take care of the costs
Insurance: Generous health insurance covering medical, dental, and vision
Health and Wellness Budget: We provide up to $150/mo reimbursement for health and wellness spending, such as gym memberships, fitness classes, or similar
Parental Leave: Work with us to build a leave schedule that works for you and your family
Offers Equity

Fulltime

Founding DevOps Engineer

As a Founding Engineer with a DevOps focus, you will play a central role in buil...

Location

France , Paris

Salary:

60000.00 - 80000.00 EUR / Year

Blu Selection

Expiration Date

Until further notice

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

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

Founding Infrastructure Engineer

As the first dedicated Infrastructure Engineer at Reducto, you will influence ev...

Location

United States , San Francisco

Salary:

150000.00 - 300000.00 USD / Year

Reducto

Expiration Date

Until further notice

Requirements

Have 5+ years of hands-on experience in building or supporting production-grade infrastructure and reliability processes for high-throughput systems
Are comfortable with Python or similar languages
Exceptional at working across cloud platforms, container orchestration (e.g., Kubernetes), networking, and storage technologies
Build your own tools on the fly to diagnose, experiment, and address reliability problems
Bring a quantitative, hands-on approach to system operations, automation, and continuous improvement
Are your own worst critic—have an extremely high bar for quality and always aim for robust solutions rather than quick fixes

Job Responsibility

Designing, building, and maintaining highly available, scalable infrastructure to support intensive AI/ML workloads and real-time model deployments
Implementing robust monitoring, alerting, and observability systems to ensure system health, performance, and uptime across cloud and on-prem environments
Debugging, optimizing, and automating infrastructure for fast iteration and rapid deployment cycles, focusing on both reliability and developer velocity
Proactively identifying, investigating, and resolving incidents to minimize downtime and maintain world-class service levels for enterprise customers
Collaborating closely with engineers, ML specialists, and founders to shape product, infrastructure, and security strategies

What we offer

Unlimited PTO
Free lunch daily at the office
Reimbursed Transportation
Generous health insurance covering medical, dental, and vision
Health and Wellness Budget up to $150/mo reimbursement
Parental Leave

Fulltime

Founding Software Engineer (Data/ML)

Koah Labs is building the ad network to power the next generation of AI-native p...

Location

United States , San Francisco

Salary:

150000.00 - 300000.00 USD / Year

Koah Labs

Expiration Date

Until further notice

Requirements

You like debugging and optimizing performance
You are detail oriented and use data to support your claims
You enjoy digging deeply and owning the platform side supporting product
You enjoy experimentation, measuring, and creating reliable systems

Job Responsibility

Build data pipelines using Debezium to stream real-time changes from PostgreSQL to our OLAP database for analytics workloads
Reduce p99 latency in critical write paths by optimizing SQL query execution plans, implementing robust retry mechanisms, and enforcing strict timeouts for third-party services
Tune conversion and clickthrough rate metrics in our core ad matcher from analyzing impression and click data
Enhance ad matching algorithms using regression analysis to identify data patterns and develop hypotheses for new predictive features that improve conversion likelihood
Set up experiment tracking and observability with logs and custom metrics that make it easy for us to understand why certain ads are chosen

What we offer

Meaningful Equity
Offers Bonus

Fulltime

Founding Robotics Engineer (R&D)

geCKo Materials is looking for a Robotics Engineer (R&D) to join our growing tea...

Location

United States

Salary:

Not provided

geCKo Materials

Expiration Date

Until further notice

Requirements

Mechatronics: ROS, Linux, controls, system integration
Programming: C++, Python, MATLAB
Electronics: circuit building and troubleshooting
Proficient with CAD
Prototyping, to include tools such as CNC machining, laser cutter, 3D printer, etc
Proficient in creating, reviewing, and editing of relevant technical documents
Industrial robot programming
Proven record of accomplishment in robotics R&D
Excellent written and verbal communication skills
Meticulous attention to detail

Job Responsibility

Develop specialized end of arm tooling for robot arms
Design, build, and implement manufacturing automation machines and processes
Design of Experiment and test apparatus creation for quality control and product testing
Work cross-functionally with manufacturing and applications engineers as a robotics SME
Provide recommendations on design and manufacturing procedures leading to new product launches
Conduct detailed research and record findings
Create and maintain relevant technical documentation
Demonstrate excellent time management skills for on-time delivery of assignments
Take ownership of and manage projects as assigned

What we offer

Health
Vision
Dental
401k
Paid volunteering opportunities

Founding Manufacturing Engineer

geCKo Materials is looking for a Manufacturing Engineer to join our growing team...

Location

United States

Salary:

Not provided

geCKo Materials

Expiration Date

Until further notice

Requirements

Mechatronics: controls, system integration, automation
Programming: C++, Python, MATLAB, etc.
Experience with CAD/CAM/FEA software
Prototyping, to include tools such as mill/lathe, laser cutter, 3D printer, etc
Proficient in operating a CNC mill
Solid foundational knowledge of GMP
Proficient in creating, reviewing, and editing of relevant technical documents
Excellent written and verbal communication skills
Meticulous attention to detail
Minimum lifting requirement of 20 lbs.

Job Responsibility

Define, develop, and implement continuous process improvements to existing manufacturing operations
Provide daily direct manufacturing support to troubleshoot and resolve issues and document solutions following GMP
Build products to meet customer demands
Design, build, and implement manufacturing automation machines and processes
Create standardized methods and procedures to improve manufacturing line efficiency–to include internally published work instructions, SOPs, and R&D reports
Estimate manufacturing costs, determine time standards, and make recommendations to improve manufacturing throughput
Identify the root causes of manufacturing related issues and perform corrective and preventive action using established problem solving methods
Prototype and test new tooling, fixtures, methods, automated systems, and production concepts
Maintain detailed records of manufacturing operations
Demonstrate excellent time management skills for on-time delivery of assignments

What we offer

Medical
Dental
Vision
401k
Paid volunteering opportunities

Founding Engineer

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

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

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Founding Engineer

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

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

Similar Jobs for Founding Engineer

Founding Application Engineer

Founding Support Engineer

Founding Security Engineer

Founding DevOps Engineer

Founding Infrastructure Engineer

Founding Software Engineer (Data/ML)

Founding Robotics Engineer (R&D)

Founding Manufacturing Engineer

Location:
United States , San Francisco

Category:
IT - Software Development

Contract Type:
Employment contract

Job Posted:
January 07, 2026