Senior Backend Engineer

Senior Backend Engineer Join to apply for the Senior Backend Engineer role at The Mobile-First Company . About The Mobile-First Company We build mobile-first business software that feels like a consumer app, runs on AI, and spreads like a creator brand. Our first product, Allô, gives you a second number on your phone, answers missed calls with AI, transcribes everything, and syncs it to your CRM. Over 20,000 businesses use it every day. We are based in Paris, Buenos Aires, Miami and are changing the way small businesses operate. What you’ll do Work side by side with our CTO to build the foundations, the present, and the future of our backend and AI systems. Develop and enhance backend systems for both existing and new applications in conjunction with mobile engineers. Contribute to systems design, infrastructure planning, CI/CD processes, and data workflows. What you're working on Implementing and maintaining scalable and reliable backend systems using languages such as Kotlin, Java, Go, Python or similar. Designing and defining backend tools, databases, and the architecture of our apps. Working directly with cloud services (e.g., AWS, Supabase, Cloudflare). Creating tools, libraries, or components to enhance the efficiency of backend development processes. We’re looking for Proficiency in backend development with expertise in languages like Kotlin, Java, Go, Python or similar. Familiarity with database design, management, and optimization. Track record of building and maintaining scalable and reliable backend systems. Experience with AI is a strong plus, especially in applying models to real‑world product use cases and optimizing performance in production environments. Expertise in designing scalable and maintainable backend architectures and applying appropriate architectural patterns. Capability of monitoring the whole architecture using tools such as New Relic or Datadog. Strong performance and data mindset – building scalable code, measuring impact, and improving based on metrics. Clear communication, ability to give and receive feedback, and a focus on user value and business impact. Comfortable working in English; knowledge of Spanish or French is a plus. How you think You care about why we build things, not just how. You ask smart questions, challenge ideas when needed, and help shape what’s next. You think in terms of user value and business impact. How you work You communicate clearly, give feedback with no ego, and help others grow. You move fast, take ownership, and thrive in ambiguity. You are proactive and autonomous, able to fill gaps and drive results. What matters to us 4+ years of experience designing and building high‑performance systems used by millions. Experience in product companies. English as our official language; Spanish and French spoken by the team. What we offer Competitive salary (USD or local equivalent). Equity package. 10‑day team retreats abroad every quarter. 30‑day onboarding in Paris with flights and housing covered. Laptop and work setup of your choice. Private health insurance (for US or LATAM hires). A tight, ambitious team building something real – fast. How to apply Click the Apply button on this page to send your application. No cover letter is needed; just tell us who you are and why this role fits you. Not the perfect match but want to join us? Send a spontaneous application to ****** . We especially want to hear from underrepresented groups in tech. We welcome applicants from all backgrounds Seniority level: Mid‑Senior; Employment type: Full‑time; Job function: Engineering and Information Technology; Industries: Mobile Computing Software Products. #J-18808-Ljbffr