Jobs in the United States

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Senior Motor Design Engineer
Sensata Technologies, Inc.
Vista, CA
The Senior Motor Design Engineer is responsible for leading the design and development of advanced Brushless DC (BLDC) Motors, Voice Coil Actuators (VCAs), and other precision…
Added just now
Mechanical Engineer
Crane Aerospace & Electronics
Auburn, CA
The Mechanical Engineer works with minimal supervision and uses originality, ingenuity and established procedures to perform engineering duties in researching, planning, designing, and…
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Mechanical Engineer I
EMCOR Group
West Sacramento, CA
- $31.25 to $38.46 USD / hour
We are a full-service HVAC, building automation, chiller, and retrofit contractor with a reputation for combining high-quality consulting services with customized energy solutions. Our…
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Staff Mechanical Buildings Engineer - HVAC / Plumbing (KC, TX, TN, FL, CA, WI) Job Details | Black & Veatch Family of Companies
Black & Veatch
Rancho Cordova, CA
The Mechanical Buildings Engineer – HVAC/Plumbing – Water and Industrial Water will support HVAC and plumbing engineering for water treatment and wastewater treatment facilities across the…
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Quality Technician Calibration
Saint-Gobain
GARDEN GROVE, CA
…impossible. Within Omniseals Solution, our teams design and engineer critical, high-performance materials and proven solutions – most in challenging conditions and core systems that play an…
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Supervisor, Energy Engineering
Walker-Miller Energy
Ann Arbor, MI · Detroit, MI
Track engineering metrics, project status, productivity, workload balance, quality, and timelines; use data to prioritize work, make timely decisions, and ensure individual and team goals…
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Supervisor, Energy Engineering
Walker-Miller Energy
Lansing, MI · Detroit, MI
Track engineering metrics, project status, productivity, workload balance, quality, and timelines; use data to prioritize work, make timely decisions, and ensure individual and team goals…
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Supervisor, Energy Engineering
Walker-Miller Energy
Grand Rapids, MI · Detroit, MI
Track engineering metrics, project status, productivity, workload balance, quality, and timelines; use data to prioritize work, make timely decisions, and ensure individual and team goals…
Added just now
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Tool Crib Machinist, CPS
Saint-Gobain
GARDEN GROVE, CA
- $30 to $40 USD / hour
…beyond the impossible. Within Mobility, our teams design and engineer critical, high-performance materials and proven solutions – most in challenging conditions and core systems that play…
Added just now
EC
Manufacturing Engineer
Eaton Corporation
Camarillo, CA
- $82,000 to $120,000 USD / year
Eaton’s AER FED Fluid Electrical Distribution division is currently seeking a Manufacturing Engineer. This is a Full-Time role (Monday-Friday, Daylight) based at our manufacturing site in…
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EC
Sr. Quality Engineer
Eaton Corporation
Camarillo, CA
- $99,000 to $145,000 USD / year
Eaton Aerospace’s Camarillo, California facility has an opening for a Senior Quality Engineer within our Interconnect Technologies Division. The Senior Quality Engineer is responsible for…
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Product Engineering Specialist - NEA and Connectors
Eaton Corporation
Camarillo, CA
…architecture, mechanism design, design margins, material and process selection, mechanical interfaces, performance, reliability, manufacturability, and…
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Industrial Engineer - Continuous Improvement
Siemens
Pomona, CA
Assures product and process quality by designing manufacturing and/or testing methods; establishing standards; confirming manufacturing processes.
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TB
Engineering Manager, OSP Construction
TAK Broadband
Corona, CA
- $110,000 to $120,000 USD / year
…crews productive and work on schedule. You will own design quality and cycle time from outage handoff through job closeout, manage the engineering team, and serve as the key technical…
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Sr. Logistics Systems Engineer
ManpowerGroup
Hayward, CA
- $90 to $95 USD / hour
Our client is seeking a Sr. Logistics Systems Engineer to join their team. As a Sr. Logistics Systems Engineer, you will be part of the Supply Chain Digital Integration team supporting…
Added 1 min ago
Manufacturing Engineer II
Crane Aerospace & Electronics
Burbank, CA
Crane Aerospace and Electronics has an exciting opportunity for a Manufacruring Engineer II at our Burbank, CA location.
Added 1 min ago
Senior Embedded Robotics SDE, Compass
Amazon
Pasadena, CA
Are you an embedded software engineer who wants to own the code that keeps robots safe and can prove it to the world? At Amazon Robotics, we're seeking an Embedded SDE to own our library of…
Added 1 min ago
RTP Manufacturing Process Engineer (SM1)
Texas Instruments
Sherman, TX
Texas Instruments is looking for an energetic engineer with a passion for process. This position provides the opportunity to drive continual improvement at all levels. Our team is primarily…
Added 1 min ago
Factory Automation Staff Engineer
ThermoFisher Scientific
Carlsbad, CA
We are seeking a hands-on Factory Automation Staff Engineer to join the Life Sciences Group (LSG) Advanced Engineering team and help build an operations-led automation acceleration…
Added 1 min ago
Digital Automation Staff Engineer
ThermoFisher Scientific
Carlsbad, CA
We are seeking a hands-on Digital Automation Staff Engineer to join the Life Sciences Group (LSG) Advanced Engineering team and help build an operations-led automation acceleration…
Added 1 min ago
Sr. Construction Manager, North America Construction Manager SSD
Amazon
Santa Monica, CA
Developing or updating process playbooks based on lessons learned from current projects
Added 1 min ago
Wireless Network Engineer - Enterprise Infrastructure
Meta
Fremont, CA
Wireless Network Engineer - Enterprise Infrastructure Responsibilities:
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Associate Manufacturing Engineer
Northrop Grumman
Palmdale, CA
Must have the ability to obtain and maintain a U.S
Added 1 min ago
Liaison Engineer (Mid-Level or Senior)
The Boeing Company
Long Beach, CA
…to develop interim or final engineering solutions to product/process issues throughout production and/or for technical, operational and quality issues that cannot be resolved by the…
Added 1 min ago
Closures Systems Engineer
Ford Motor Company
Long Beach, CA
…Working as one end-to-end organization, we turn ideas into high-quality vehicles, software and experiences across gas, hybrid and electric, designed around what customers…

EarnIn

Senior AI Builder

Mountain View, CA, United States

Apply on job-boards.greenhouse.io About employer

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Job details

Experience: 4+ years of full-time software engineering experience, with at least 2 years building tooling, platforms, or internal developer products
Posting language: English
Posted: Jul 9, 2026

Original job description

ABOUT EARNIN

As one of the first pioneers of earned wage access, our passion at EarnIn is building products that deliver real-time financial flexibility for people living paycheck to paycheck. Our community members access their earnings as they earn them, with options to spend, save, and grow their money without mandatory fees, interest rates, or credit checks. We’re fortunate to have an incredibly experienced leadership team, combined with world-class funding partners like A16Z, Matrix Partners, DST, Ribbit Capital, and a very healthy core business with a tremendous runway. We’re growing fast and excited to bring on world-class talent to help shape the next chapter of our growth journey.

EarnIn is becoming an AI-native company, embedding AI agents into how we build, analyze, and operate across every function. Teams use AI Agents to move from ideas to execution faster. By letting agents handle repetitive tasks, our people can focus on judgment, creativity, and hard problems. We pair this experimentation with the strict review and security guardrails our regulated financial environment requires, always keeping a focus on privacy and the people who rely on our products.

As a company, we are becoming AI-native, and we encourage you to use AI tools throughout much of your interview process. If you use AI during the live interview, just say so; a quick, natural mention of how it helped and why you are using it is all we need. What we're evaluating is your judgment, reasoning, and ability to own and defend your work, not whether AI was involved. Some rounds, particularly those focused on your career history and past experiences, will not allow the use of AI, and we'll let you know of those in advance. When in doubt, ask your recruiter or interviewer directly.

POSITION SUMMARY

EarnIn is making AI-native engineering a core capability - not an initiative, but how we design, build, and ship. We're not hiring a software engineer who dabbles in AI. We're hiring an AI builder who also writes great software - someone who looks at every step of how we design, build, test, and ship, and asks: why isn't an agent doing this? This is not a side project. The agents and harnesses you build here will run in production, making real decisions for real people - people who depend on EarnIn to access their pay when it matters most. If that bar excites you rather than intimidates you, keep reading.

You'll work at the intersection of platform engineering, developer experience, and applied AI - partnering with architects, domain leads,, and product engineers to build the tools, patterns, and guardrails that make AI adoption fast, safe, and durable. The Mountain View base salary range for this full-time position is $228,000 - $279,000, plus equity and benefits. Our salary ranges are determined by role, level, and location. This is a hybrid position in Mountain View that requires in-office work 2 days a week.

WHAT YOU'LL DO

Agents that take real actions. You'll design how agents think - prompts, reasoning chains, tool calls, and the full architecture beneath them. From MCP servers and agent scaffolding to context harnesses and a Skills Marketplace, you're building the layer every squad at EarnIn builds on. Not a proof of concept. Production infrastructure.

A PDLC that doesn't look like 2022. The product development lifecycle is overdue for a rethink. You'll challenge each stage - from scoping and design through to review, testing, deployment, and monitoring - and replace manual friction with agentic workflows wherever it makes sense. Evaluation pipelines, automated PR hygiene, deployment gating, generation-to-merge metrics: you'll build the scaffolding that makes governed AI fast, not slow.

Evals that actually mean something. You'll own the evaluation infrastructure - building the pipelines, benchmarks, and quality gates that tell us whether our AI is working, degrading, or ready to ship. That means designing eval harnesses for AI-assisted workflows, setting generation-to-merge and review latency baselines, and making model quality visible and trustworthy across teams. If you've built evals that caught real problems before they hit production, you'll fit right in.

Pilots that graduate to production. EarnIn's engineering leads are running experiments. You'll be the person who takes what's working and turns it into something the next team can fork and ship in a week. Less "interesting prototype," more "thing we rely on." You’ll build reusable libraries, templates, and reference implementations that give squads a running start on AI integration, so no one has to solve the same problem twice

WHAT SUCCESS LOOKS LIKE

Teams across engineering can ship AI-assisted features faster, with fewer rework loops
The harnesses you build are actively used and well-documented
AI pilot quality and safety metrics are visible, trustworthy, and improving

WHAT WE'RE LOOKING FOR

4+ years of full-time software engineering experience, with at least 2 years building tooling, platforms, or internal developer products
Bachelor’s, Master’s, or PhD in Computer Science, Computer Engineering, or a related technical discipline, or equivalent industry experience. We care about what you’ve built, not where you studied.
Hands-on experience with LLM integration patterns - prompt engineering, RAG pipelines, tool/function calling, and agent architectures
Proficiency and comfort working across the stack when needed
Experience with MCP, LangChain, or comparable orchestration frameworks
Experience with open source LLM models
Strong opinions about developer experience and a track record of building things other engineers actually use

YOU'LL STAND OUT IF YOU HAVE

Hands-on experience with reinforcement learning - especially RLHF, RLAIF, or reward modeling in applied product contexts
Experience in fintech or regulated/security-sensitive environments
Hands-on work with AI governance - bias evaluation, audit logging, model cards
Exposure to multi-step reasoning pipelines or human-in-the-loop system design

At EarnIn, we believe that the best way to build a financial system that works for everyday people is by hiring a team that represents our diverse community. Our team is diverse not only in background and experience but also in perspective. We celebrate our diversity and strive to create a culture of belonging. EarnIn does not unlawfully discriminate based on race, color, religion, sex (including pregnancy, childbirth, breastfeeding, or related medical conditions), gender identity, gender expression, national origin, ancestry, citizenship, age, physical or mental disability, legally protected medical condition, family care status, military or veteran status, marital status, registered domestic partner status, sexual orientation, genetic information, or any other basis protected by local, state, or federal laws. EarnIn is an E-Verify participant.

EarnIn does not accept unsolicited resumes from individual recruiters or third-party recruiting agencies in response to job postings. No fee will be paid to third parties who submit unsolicited candidates directly to our hiring managers or HR team.

Work requirements

Jobs in the United States