Senior Fullstack Software Engineer

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 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 are looking for an experienced, passionate, and resourceful senior-level engineer with a proven track record to join the EarnIn payroll services team. In this role, you will participate in the design, development, and implementation of both backend services and the frontend experiences that power EarnIn’s new time & attendance product. You’ll work across the stack to ensure backend systems and user-facing applications are well-aligned, intuitive, and reliable. Come make a difference with us and have fun doing it! This position is ideally hybrid from our Mexico City office as part of our expanding site, though remote can be considered. EarnIn offers excellent benefits, including healthcare, internet and cell phone reimbursement, a learning and development stipend, and potential opportunities to travel to our Mountain View, CA headquarters. Our salary ranges are determined by role, level, and location. WHAT YOU'LL DO Design & build key components for EarnIn’s time-and-attendance system. Develop robust, secure, and scalable backend services and APIs (Golang) while contributing to intuitive, accessible user-facing frontend (ReactJS) features for our new time & attendance product. Collaborate closely with product managers, designers, and fellow engineers to deliver high-impact features that meet the needs of customers end to end. Design, implement, and maintain scalable and reliable backend microservices for EarnIn’s payroll products. Investigate and resolve production issues across the stack with a focus on root cause analysis, long-term stability, and continuous improvement. Contribute to building a modern, best-in-class platform that handles time-critical workflows with precision and reliability. Conduct code reviews to ensure code quality, adherence to best practices, maintainability, and alignment with project requirements, while providing constructive feedback to team members across backend and frontend codebases. Ensure the delivery of high-quality software features within established timelines. WHAT WE'RE LOOKING FOR 4+ years of development experience in a fast-paced environment. Bachelor’s degree in computer science, computer engineering, or a related technical discipline, or equivalent industry experience. Experienced in building and maintaining end-to-end web applications using modern backend languages (e.g., Go, C#, Python) and frontend frameworks (e.g., React, TypeScript), with a strong focus on scalable architecture and user-centric design. Hands-on experience working with relational databases. Cloud experience, AWS preferred. Experience managing infrastructure and service configurations using Configuration as Code (e.g., Helm, Kustomize, Terraform). Deploy and operate backend services in a Kubernetes-based environment, optimizing for resiliency, scalability, and performance. Comfort collaborating across the stack, including working closely with design and product to translate requirements into user-facing functionality. Excellent written and verbal communication skills. Experience using AI-assisted development tools (e.g., GitHub Copilot, Cursor, ChatGPT, or similar tools) as part of your software development workflow Ability to thrive in a fast-paced, dynamic environment with a strong bias toward action and results. #LI-Hybrid A Note on AI in the Hiring Process: EarnIn may use Artificial Intelligence (AI)-powered tools during the hiring process, including tools that generate summaries or notes for interviewers, review resumes, assist with scheduling, or help identify themes across candidate responses and profiles for a given role. Final hiring decisions are made by human interviewers and hiring managers. If you have any concerns about the use of AI in our hiring process, please connect with your recruiter. With your consent, EarnIn may use AI tools to help transcribe or summarize interviews. Recordings are treated as confidential candidate data and are accessible only to authorized hiring personnel. Declining to be recorded will not negatively affect your candidacy or evaluation. 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.