# The Mobile-First Company - Sr\. Backend Engineer - Company: [Silver]() - Location: Argentina / Hybrid - Remote: Yes - Team: Engineering - Employment type: Full Time - Salary: $60K – $90K - Posted: September 1, 2025 ## Job description Location: **Buenos Aires, Argentina (Hybrid)** ## [**About The Mobile-First Company**](https://www.themobilefirstcompany.com) Most tools for small businesses weren’t built for real operators. They were built for employees in offices, not people running a business from their phone. We’re changing that. 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](https://www.withallo.com/), 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.** Next up: expenses, invoicing, and more. We’ve raised **+5 million dolars** from Lightspeed, EMBLEM, and 30+ top operators. Our team is based in **Paris, Buenos Aires**, **Miami**. Drive the evolution of our backend technology, infrastructure, and AI capabilities to ensure high performance, scalability, and seamless integration for our mobile applications. ## **What will you 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'll be working on:** * Implementing and maintaining scalable and reliable backend systems using languages like 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. ## **What we’re looking for** 1. Backend Engineering: * 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. 2. Systems Architecture: * Expertise in designing scalable and maintainable backend architectures, understanding when to apply different architectural patterns. * Capable of monitoring the whole architecture using tools like New Relic or Datadog. 3. Performance and data * You know how to build scalable and maintainable code * You care about what to measure and how it impacts business and users * You track behavior, usage, and performance, and improve based on it 4. 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. 5. 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're comfortable working in English — and in a small team with big goals. ## **What matters to us** * You’ve worked in product companies * 6+ years of experience designing and building high-performance systems used by millions. * You’re proactive, autonomous, and know how to fill the gaps * You can communicate in English, since that's our official language. Most of the team also speaks Spanish and French. ## **What we offer** * Competitive salary (in USD or local equivalent) * Equity package * 10-day team retreats abroad every quarter * Laptop and work setup of your choice * Private health insurance (for US or LATAM hires) * A tight, ambitious team building something real — fast ## **The Interview Process:** * [Silver.dev](http://Silver.dev) Recruiter Screening * Client People Interview * Client Technical Interview * Client Behavioral Interview ## Apply [Apply on Silver]() Canonical job page: