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As one of the first pioneers of earned wage access, our passion at EarnIn is building products that deliver real-time financial flexibility for those with the unique needs of 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 are excited to continue bringing world-class talent onboard to help shape the next chapter of our growth journey.
POSITION SUMMARY
We’re seeking a Python-focused Senior backend engineer with at least 4 years of experience to join our AI/LLM platform team. You’ll help build, deploy, and evaluate agentic systems—applications that use large language models (LLMs) to autonomously reason and act in user-facing workflows. Your work will support EarnIn’s mission to provide fair and intelligent financial tools to millions of users.
The base salary range for this full-time position is $207,000 - $253,000 plus equity and benefits. Our salary ranges are determined by role, level, and location. This is a hybrid position in Mountain View (Headquarters) and will require in-office work 2 days a week.
WHAT YOU'LL DO
- Build backend services in Python to support agentic applications powered by LLMs.
- Design and implement prompt orchestration layers, memory/context pipelines, and external tool integrations used by agents.
- Develop systems for evaluating agent behavior, including success metrics, error tracing, and regression testing of multi-step workflows.
- Expose and maintain RESTful APIs that interact with internal tools and external-facing LLM applications.
- Collaborate cross-functionally with ML engineers, data scientists, and product to shape intelligent and safe AI features.
- Manage observability for agent pipelines, using tools like logging, tracing, and distributed monitoring.
- Build and maintain asynchronous processing systems (e.g., Celery, asyncio, or messaging queues).
WHA WE'RE LOOKING FOR
- Bachelor's or Master’s degree in Computer Science, Engineering, or a related field.
- 4+ years of industry software engineering experience
- Strong understanding of LLM APIs (e.g. OpenAI, Claude) and prompt engineering.
- Experience developing or integrating with agentic systems (e.g., LangChain, custom frameworks).
- Familiarity with designing evaluation frameworks for AI behavior, including automated checks and offline test harnesses.
- Experience with API design, async workflows, and production database usage (SQL or NoSQL).
- Clear communication and collaborative mindset.
- Experience with LLM evaluation tooling, prompt unit testing, or behavioral regression suites.
- Familiarity with vector stores (e.g., Weaviate, Pinecone, Qdrant).
- Knowledge of OpenTelemetry or similar observability frameworks for distributed systems.
- Exposure to container-based deployment or serverless environments (Docker, AWS Lambda, etc.).
#LI-Hybrid
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.
Earnin Palo Alto, California, USA Office
260 Sheridan Ave., Palo Alto, CA, United States, 94306
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