Senior Backend Developer

Alohi is an AI-first SaaS scale-up on a mission to simplify how businesses work. Our products (Sign.Plus, Dial.Plus, Fax.Plus, and Scan.Plus) serve 5M+ customers worldwide, from small businesses to global enterprises. We're building category-defining tools that people actually love to use. We started with seed support from FONGIT (Fondation Genevoise pour l'Innovation Technologique), backed by the State of Geneva. Since then, we've chosen to bootstrap our growth. This keeps us financially independent, customer-focused, and able to move fast without external constraints. We're a lean, fast-growing team based in Geneva with strong traction across global markets. This is an entrepreneurial environment where you'll have high ownership, broad responsibilities, and direct impact from day one. If you want to build something meaningful in a fast-paced, innovation-driven company, without the chaos of early-stage uncertainty or the bureaucracy of a large corporation, this is it. We are hiring a Senior Backend Developer to build and scale the server-side systems that power our products. You'll own the development of APIs, backend modules, and database architecture, ensuring high performance and reliability as we serve millions of users worldwide. This position is fully on-site at our Geneva office. RESPONSIBILITIES We're looking for a hands-on engineer who can design, build, and maintain backend systems that scale. Backend Development * Build and maintain mission-critical backend systems to support high-volume requests across our product suite * Design and develop robust APIs and web services that power our frontend applications * Develop and maintain backend modules, ensuring clean architecture and maintainable code * Build backend infrastructure for AI-powered features, including integration with LLMs, model APIs, and data pipelines for machine learning workflows Performance & Scalability * Identify and resolve performance bottlenecks in a high-traffic, scalable environment * Optimise database queries and system architecture to handle growing demand * Ensure development tasks are completed within timelines with minimal defects Infrastructure & DevOps * Work with containerisation technologies (Docker, Kubernetes) to deploy and manage services * Contribute to CI/CD pipelines and build systems to streamline development workflows * Participate in on-call rotations to ensure system reliability and respond to production incidents * Collaborate with cross-functional teams to deliver features end-to-end REQUIREMENTS * 3–5 years of experience in backend software engineering, ideally in a technology-driven or SaaS environment * Strong proficiency in Python * Solid experience with complex data structures and databases (MongoDB, MariaDB, Elasticsearch) * Able to critically evaluate and effectively use AI-assisted development tools while maintaining a deep understanding of the underlying code * Strong Linux knowledge and hands-on experience * Good understanding of HTTP, REST, web servers, and microservices architecture * Experience with containerisation (Docker, Kubernetes) * Familiarity with build systems and CI/CD procedures * Ability to write clean, scalable, and well-tested code * Strong problem-solving skills and attention to detail * Fluent in English (written and spoken) WHAT WE OFFER Office First: We believe the best collaboration happens in person. You'll be based at our Geneva office, working alongside a lean, high-calibre team where ideas flow freely and decisions happen fast. AI-First Technology: We provide all the devices and software you need to excel, including access to cutting-edge AI tools and a modern tech stack. You'll have the best resources at your disposal to move quickly and build great things. Personal Development: We invest in your growth with a dedicated learning budget for training programmes, conferences, courses, and professional development opportunities. Quarterly Events & Annual Retreats: Regular team events and company-wide retreats to connect, celebrate wins, and have fun together. Award-Winning Culture: We're proud to be recognised as a Great Place to Work and Best Workplace, reflecting our commitment to building an environment where talented people thrive. Perks & Wellbeing: Weekly yoga sessions, plus discounts on gym memberships, restaurants, and Apple products to support your lifestyle inside and outside of work.

We’re hiring a hands-on Backend Developer to build and ship production serverless services for a fintech platform.  TECH STACK * Languages: TypeScript, Node.js (18–22) * AWS: Lambda, DynamoDB, S3, SQS, EventBridge, Step Functions * Databases: DynamoDB, PostgreSQL  * Frameworks / middleware: Serverless Framework, Middy * Libraries: Zod (schemas/validation), Winston (logging), AWS X-Ray (tracing), Luxon (dates) * Testing: Mocha, Sinon * Tooling: ESLint, Prettier, Terraform, GitHub Actions YOUR ROLE AT XPATE: * Build and evolve Lambda-first microservices that handle real money flows and integrations. * Design REST APIs with type-safe schemas (Zod) and contracts that don’t rot. * Model data in DynamoDB (access patterns first) and use PostgreSQL when relational fits better. * Ship event-driven workflows with SQS/EventBridge/Step Functions: retries, idempotency, dead-letters, backpressure. * Ensure observability: structured logging (Winston), distributed tracing (AWS X-Ray), actionable metrics. * Write tests that protect releases (Mocha/Sinon), keep quality bars high, and reduce regressions. WE’RE READY TO MEET YOU, IF… * You have strong hands-on backend engineering experience in TypeScript / Node.js. * You have real AWS production experience — not “used Lambda once”, but built, operated, debugged, and fixed systems in production. * You have the ability to ship fast without trashing quality: clean code, predictable delivery, and solid engineering fundamentals. * You use AI tools daily to accelerate output (coding, debugging, analysis) and improve outcomes. * You have English at B2+ level (the team is English-speaking). WHAT WORKING AT XPATE LOOKS LIKE: * A competitive salary (depending on what you bring). * Everything you need to succeed, with flexibility built in — from flexible hours and hybrid/remote work options to private health insurance and paid time off. * Top-of-the-line Apple gear to fuel your work. * A workspace designed for focus and collaboration. * Ownership of your work end-to-end, with the freedom to move fast and make a real impact. * Celebrated wins, opportunities to grow and a culture where voices are heard and chances to grow are ever-present. WHY JOIN XPATE? We're building the financial backbone of the future, where payments move freely and businesses thrive without barriers. If you want real impact, freedom to innovate, and work that drives change - xpate is the place for you.