Jobs in the United States

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Liaison Engineer (Mid-Level or Senior)
The Boeing Company
Long Beach, CA
Boeing Global Services (BGS) Post-Production Modifications Support is seeking a Mid-Level or Senior Liaison Engineer to support modification projects for Product Lines: Interiors,…
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Closures Systems Engineer
Ford Motor Company
Long Beach, CA
Product Creation and Industrialization (PC&I) brings together Ford’s vehicle, electric, digital and design teams with our global manufacturing system. Working as one end-to-end…
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Software Engineer, Product - Central Integrity
Meta
Menlo Park, CA
…exists to keep billions of people safe on Meta's platforms. We design and deploy systems that detect and disrupt harm at an unprecedented global scale, making this one of the largest…
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PT
Systems Engineer
PDS Tech Commercial
El Segundo, CA
- $56.65 to $80 USD / hour
As a Systems Engineer , you'll be a key contributor to the design, development, integration, and verification of advanced spacecraft systems. Working across multiple engineering…
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Hardware Engineering Manager
The Boeing Company
El Segundo, CA
Lead, mentor, and develop a team of electrical, electronics, RF, mechanical, and power system engineers
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Principal Product Support Engineer - Supportability (LSA)
Northrop Grumman
El Segundo, CA
Northrop Grumman Aeronautics Systems is seeking a Principal Product Support Engineer to join our diverse team of professionals within our Research and Advanced Design organization. This…
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Sr. Electrical Design Engineer (Starshield)
SpaceX
Hawthorne, CA
…communications, and hosted payloads. As an electrical development engineer on the Starshield team, you will demonstrate extreme ownership through detailed and thorough design, hardware…
Added 1 min ago
Sr. Hardware Development Engineer, AWS Board Core Design and Services Team
Amazon
Cupertino, CA
…hardware to the next level. As a Senior Hardware Development Engineer on the AWS Board Core Design team within the Core Components Organization, you will develop the building blocks for our…
Added 1 min ago
Staff Software Engineer, ML Infrastructure, Search Agentic Growth Engine
Google
Mountain View, CA
…including information retrieval, distributed computing, large-scale system design, networking and data storage, security, artificial intelligence, natural language processing, UI design and…
Added 1 min ago
Software Engineer III, AI/ML GenAI, YouTube
Google
Mountain View, CA
…including information retrieval, distributed computing, large-scale system design, networking and data storage, security, artificial intelligence, natural language processing, UI design and…
Added 1 min ago
Staff Software Engineer, DeepMind
Google
Mountain View, CA
3 years of experience leading software design and system architecture for high-throughput distributed systems, foundation model runtimes, or client applications.
Added 1 min ago
Engineer II, Mechanical - Instruments
Danaher Corporation
Irvine, CA
The Engineer II, Mechanical – Instruments is responsible for the design, development, testing, and sustaining of mechanical components and assemblies for patient monitoring instruments and…
Added 1 min ago
DC
Engineer II, Hardware Design
Danaher Corporation
Irvine, CA
- $90,000 to $115,000 USD / year
The Engineer II, Hardware Design is responsible for is responsible for the design, development, verification, and support of electronic hardware used in Masimo’s medical device products.…
Added 1 min ago
Embedded Software Development Engineer, Ring
Amazon
Sunnyvale, CA
As a Software Development Engineer, you will be responsible for defining, building and supporting the system design, architecture, and software for Ring IoT products. As a member of our…
Added 1 min ago
Software Engineering Manager II, Infrastructure, Google Cloud
Google
Sunnyvale, CA
Like Google's own ambitions, the work of a Software Engineer goes beyond just Search. Software Engineering Managers have not only the technical expertise to take on and provide technical…
Added 1 min ago
Sr. eSDE - BSPLinux, HW Compute Group
Amazon
Sunnyvale, CA
We are looking for a Sr Embedded Software Development Engineer to help design, develop, and integrate our next generation devices. In this role you will work with customers, system…
Added 1 min ago
Sr. Security & Test Engineer - Device OS (PKI & Firmware Security)
Fiserv
Sunnyvale, CA
Automated Security Test Engineering: Design, build, and maintain automated security test frameworks and test beds (in Python) to continuously validate platform security across Android…
Added 1 min ago
Senior Staff Software Engineer, NetSoft UTL, Google Global Infrastructure
Google
Sunnyvale, CA
…including information retrieval, distributed computing, large-scale system design, networking and data storage, security, artificial intelligence, natural language processing, UI design and…
Added 1 min ago
Android Application Framework Developer - Device Engineering
Fiserv
Sunnyvale, CA
If you are a recent graduate or early-career engineer eager to dive deep into the Android OS, manage USB/network hardware protocols, and see your code drive physical smart terminal hardware…
Added 1 min ago
Staff Power Management Engineer, Platforms Engineering
Google
Sunnyvale, CA
6 years of experience working with power chip or system power management features definition, design, implementation, integration, and testing.
Added 1 min ago
Senior Software Engineer, Security/Privacy, Google Cloud Security and Privacy
Google
Sunnyvale, CA
…including information retrieval, distributed computing, large-scale system design, networking and data storage, security, artificial intelligence, natural language processing, UI design and…
Added 1 min ago
Controls and Simulation Engineer Level 5
Northrop Grumman
Sunnyvale, CA
Northrop Grumman Mission Systems is seeking Systems Controls and Simulation Engineer Level 5 for the development and ongoing support of new and existing turbine generators used in surface…
Added 1 min ago
Mechanical Engineer level 3/4
Northrop Grumman
Sunnyvale, CA
Northrop Grumman is seeking Mechanical Design Engineer Level 3/4 to join our team based out of Sunnyvale, Ca. The Marine Systems organization, part of Northrop Grumman Mission Systems, is…
Added 1 min ago
Software Engineer, Infrastructure - Ads Infra and Ranking
Meta
Sunnyvale, CA
Software Engineer, Infrastructure - Ads Infra and Ranking Responsibilities:
Added 1 min ago
GPU Formal Verification Engineer
Apple
Santa Clara, CA
…detail? As part of our Silicon Technologies group, you’ll help design and manufacture our next-generation, high-performance, power-efficient processor, system-on-chip (SoC). You’ll ensure…

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