Senior/Staff Backend Engineer - AI Compliance Tooling

Qonto

Our mission and customers: We are creating the freedom for SMEs to succeed by delivering Europe's leading finance workspace with banking at its core, augmented by financial tools. We are proud to be rated 4.8 on Trustpilot, based on 55,000+ reviews. Our culture puts customer satisfaction at the core of what we do, as proven by our Net Promoter Score of 75 (more about our culture here). Our journey: Founded in 2017 by Alexandre and Steve, Qonto has grown to 1,600+ Qontoers serving over 600,000+ customers across 8 European countries. We have been profitable since 2023, and we are just getting started. Our beliefs: We hire for skills and potential. With 80+ nationalities, 45% women, of which 56% of women in our leadership team, diversity isn't a program; It's who we are. We've built a discrimination-free hiring process because the best teams are built on merit. AI at Qonto: AI is deeply embedded in how we work (here) - Every Qontoer gets unlimited access to the best AI tools. We want people who experiment without waiting for permission, push AI beyond the obvious, know when to trust it, and when to question it. ------------------------------------------------------------------------------------------------------ 🌏 Location: You can choose to work in Qonto as long as you're living in (or willing to relocate to) either Germany, France, Italy, Serbia, or Spain. Mission: Join us as a Backend Engineer to build the financial infrastructure that 600,000+ European SMEs depend on every day, from highly scalable APIs to robust banking services that handle real money, in real time, with zero room for mistakes.   ➡️ As a Backend Engineer at Qonto, you will Design, build, deploy, and maintain services handling real financial transactions, owning reliability in production, not just at merge time Co-own service architecture, resilience, and scalability with respect to Domain-Driven Design principles Grow in technical leadership: lead design discussions, anticipate risks, and mentor less experienced engineers Drive continuous improvement, from fixing flaky CI to running post-mortems and propagating learnings across the team Our primary languages are Go and Ruby. Our platform runs on a Kubernetes cluster hosted on AWS, with PostgreSQL as our database of choice. We're also using Kafka for event-driven architecture and ELK for logging and auditing, among many other tools and services.   ➡️  What you can expect: our methodology, the Qonto Way We value upfront technical design, team reviews, and smart slicing, quality drives the velocity our customers need Our org assigns one team lead per project across stacks, giving your team a clear mission and full autonomy on how it operates Our lean toolbox, Kaizen, PDCA, lets you monitor and drive continuous improvement collaboratively with your peers and manager Each engineer gets access to Cursor or Copilot, and we want people who use AI to raise the bar, not just to go faster   ➡️  Your future team As a Backend Engineer, you will join one of Qonto's squad teams, each organised around a clear project mission, with one team lead and full ownership of a product scope. You'll be part of a 190-strong backend engineering community within a 500- Product Engineering department, working in squad teams of 5 to 10 people alongside Product, Design, and peers from Frontend and Mobile.   ➡️ About You Technical expertise: Strong backend engineering experience with exposure to large-scale web application architecture and real production constraints Stack fluency: You don't need to know our exact stack, but you transfer fast and are comfortable with similar technologies Quality-driven: You write tests, set up monitoring, handle incidents methodically, and do root cause analysis Ownership mindset: You track impact after release, flag regressions, and improve what's in your scope without being asked Team player: Comfortable working in squad teams with PMs, Designers, and other stacks; fluent in English

DeepL

MEET DEEPL DeepL is a global AI product and research company focused on building secure, intelligent solutions to complex business problems. Over 200,000 business customers and millions of individuals across 228 global markets today trust DeepL's Language AI platform for human-like translation, improved writing and real-time voice translation. Founded in 2017 by CEO Jaroslaw “Jarek” Kutylowski, DeepL now has around 1,000 passionate employees and is supported by world-renowned investors including Benchmark, IVP, and Index Ventures. Our goal is to become the global leader in trusted, intelligent AI technology, building products that drive better communication, foster connections, and create a meaningful impact. To achieve this, we need talented people like you to join our journey. If you’re ready to shape the future of AI and grow your career in a fast-moving, purpose-driven environment, DeepL is your next destination. WHAT SETS US APART What sets us apart is our blend of cutting-edge AI technology, meaningful work, and a culture where people truly thrive. We’re a team of innovators, researchers, and creators driven by a shared purpose to unlock human potential by making work simpler, smarter, and more connected. When we share what it’s like to work at DeepL, the reactions are overwhelmingly positive. This might be because of our technology that helps millions of people and businesses communicate and work better every day, or because of the trust, curiosity, and care that shape our culture. What we know for sure is this: being part of DeepL means joining a team dedicated to innovation, growth, and well-being. Discover more about life at DeepL onLinkedIn,Instagram, and our Blog. MEET THE TEAM BEHIND THIS JOURNEY The API & Partnership track acts as the gateway to DeepL, enabling the world to integrate our Language and AI capabilities into their own digital ecosystems. We do not just build APIs; we architect the "Golden Path" that allows internal teams to ship faster while ensuring our external interfaces are enterprise-ready. We are the stewards of scale, trust, and integration, empowering millions of users to access DeepL reliably and securely. YOUR RESPONSIBILITIES You will serve as a technical strategist, enabling 10x API delivery speed and establishing the trust required for enterprise adoption. Your work will bridge the gap between complex distributed systems and seamless partner integrations. You will: * Drive API Strategy & Scale: Architect a hyper-scalable infrastructure designed to support exponential growth in traffic and data volume. You will set the technical vision for our microservices, ensuring our systems remain resilient, secure, and performant as we scale to the next tier of usage. * Enable the Partner Ecosystem: Lead the technical side of strategic partnerships, building integrations with AWS Marketplace and enterprise SaaS providers. You will own the delivery of "Trust" features—such as granular billing, residency controls, and auditability—that are essential for closing enterprise deals. * Force-Multiply Engineering Velocity: Establish rigorous platform standards (contracts, versioning, security) that raise the bar for the entire organization. By building self-service tooling and automated quality gates, you will empower product teams to deploy independently without breaking production. QUALITIES WE LOOK FOR * Distinguished Technical Experience: 10+ years in software engineering with a focus on high-scale distributed systems and API platform architecture. You have "been there, done that" with modern cloud stacks and backend technologies, and you drive engineering cultures centered on automated testing and operational discipline. * Enterprise Integration Mastery: You understand the nuance of the enterprise landscape. You have deep experience navigating compliance, security, and data residency challenges while building integration patterns that allow third-party ecosystems to thrive on top of your platform. * Strategic Communication: You can translate complex technical challenges into clear strategic proposals. You are adept at writing RFCs and influencing stakeholders across the business—from product managers to other Staff engineers—driving consensus and execution in ambiguous environments. * AI-Native Developer: You embrace the potential of AI to transform software development. You actively use and advocate for AI tools to streamline workflows and are eager to guide the organization in adopting AI-assisted engineering practices. WHAT WE OFFER * Diverse and internationally distributed team: joining our team means becoming part of a large, global community with people of more than 90 nationalities. We're more than just colleagues; we're a group of professionals with a shared mission to connect diverse cultures. Our global presence is growing–we've doubled in size nearly every year, with our employees based in the UK, Germany, the Netherlands, Poland, the US, and Japan, and we continue to expand our network. * Open communication, regular feedback: as a language-focused company, we value the importance of clear, honest communication. We value smooth collaboration, direct and actionable feedback, and believe that leading with empathy and growth mindset makes us better together. * Hybrid work, flexible hours: we offer a hybrid work schedule, with team members coming into the office twice a week. This allows you to engage directly with your team and experience the unique energy of our workspace, while still enjoying the flexibility and comfort of working from home. With flexible working hours and trust in your productivity, we are in sync with your team's general locations and time zones to foster effective and seamless collaboration. * Virtual Shares - An ownership mindset in every role. We believe everyone should share in our success, and that's why every employee receives Virtual Shares, linking your contribution directly to DeepL's growth and rewarding you with a stake in our future. * Regular in-person team events: we bond over vibrant events that are as unique as our team, from local team and business unit gatherings, to new-joiner onboardings, to company-wide events that bring us all together–literally. * Monthly full-day hacking sessions: every month, we have Hack Fridays, where you can spend your time diving into a project you're passionate about and get the opportunity to work with other teams–we value your initiatives, impact, and creativity. * 30 days of annual leave: we value your peace of mind. With 30 days off (excluding public holidays) and access to mental health resources, we make sure you're as strong mentally as you are professionally. * Competitive benefits: just as our team spans the globe, so does our benefits package. We've crafted it to reflect the diversity of our team and tailored it to align with your unique location, to ensure you feel supported every step of the way. If this role and our mission resonate with you, but you're hesitant because you don't check all the boxes, don't let that hold you back. At DeepL, it's all about the value you bring and the growth we can foster together. Go ahead, apply—let's discover your potential together. We can't wait to meet you! #LI-JL1 WE ARE AN EQUAL OPPORTUNITY EMPLOYER You are welcome at DeepL for who you are - we appreciate authenticity here. Our product is for everyone, and so is our workplace. The more voices we have represented and amplified in our business, the more we will all succeed, contribute, and think forward! So bring us your personal experience, your perspectives, and your background. It’s in our diversity that we will find the power to break down language barriers in the world.

Fonoa

Fonoa is the Tax Operating System for autonomous tax. AI that tracks every rule, acts on every obligation, and proves every decision, built on modular infrastructure. Fonoa’s modules cover the full indirect tax lifecycle: tax ID validation, real-time tax determination, e-invoicing, and returns. All on one shared data model and integration, with one audit trail. Each added capability makes the others stronger. Agents monitor obligations, populate returns, catch anomalies and assemble audit packs in seconds. The system does the work. Humans make the calls. That’s autonomous tax. We operate across 120+ countries, with clients going live in weeks, if not days. Trusted by Canva, Netflix, Spotify, Uber, Zoom and Booking.com. Rated 4.5/5 stars and a High Performer on G2 and 4.6/5 stars on Gartner Peer Insights. Find out more: www.fonoa.com ABOUT ENGINEERING AT FONOA Engineering is central to how we build the business. We focus on solving real customer problems, not just shipping features. We work in small, high-trust teams, with full ownership across the lifecycle, from design to production and beyond. We value: * Ownership – engineers own what they build end-to-end * Simplicity – we break down complex problems into clear solutions * Thinking Big - we innovate with modern technologies (LLMs, AI Agents, etc.) to solve meaningful problems * Quality – scalable, maintainable systems are non-negotiable * Speed & iteration – we ship fast, learn, and improve continuously * Collaboration – we win as a team, not as individuals POSITION OVERVIEW As Fonoa continues to evolve beyond APIs into a broader platform experience, we are looking for a Frontend Engineer to help redefine how our products are designed, built, and experienced across the company. This role goes far beyond implementing interfaces. You will play a foundational role in shaping the future of the Fonoa platform — from customer-facing products and internal tooling to the overall design system, interaction patterns, and frontend architecture that ties everything together. We are looking for someone who cares deeply about product experience, systems thinking, and frontend craftsmanship. Someone who can work closely with product, engineering, and design to build products that feel fast, intuitive, and thoughtfully designed, while also helping define how frontend engineering operates and scales at Fonoa. As our platform evolves toward more intelligent, agent-driven workflows, the frontend becomes a critical part of the experience. We want to move beyond traditional dashboards and workflows toward interfaces that feel more dynamic, contextual, and assistant-like, helping customers navigate complex compliance and tax operations in a much more seamless way. This is a highly collaborative, hands-on role for someone who thrives in ambiguity, enjoys shaping products from first principles, and wants to have a meaningful impact on both the user experience and the engineering culture around frontend development. We are not looking for someone to simply “build screens.” We are looking for someone who can help define: * How products should feel * How frontend systems should scale * How users interact with increasingly intelligent workflows * And how design and engineering work together to create exceptional products WHAT YOU WILL BE DOING * Redesign and evolve product experiences across customer-facing and internal platforms * Help define and scale our frontend architecture, patterns, and design systems * Build fast, reliable, and intuitive user experiences across web applications * Collaborate closely with product, design, and engineering to shape new workflows and features * Contribute to the visual identity and frontend standards of the platform * Help evolve Fonoa from an API-first company into a broader platform experience * Build interfaces that support intelligent, assistant-like, and agent-driven workflows * Continuously improve frontend quality, performance, maintainability, and developer experience * Mentor and influence frontend standards and practices across the engineering organisation WHAT WE’RE LOOKING FOR * Strong experience building high-quality frontend applications and product experiences * Deep understanding of frontend architecture, state management, performance, and scalability * Strong product and design instincts, with attention to detail and usability * Ability to collaborate closely with designers and product teams from concept to production * Experience designing and evolving frontend systems and reusable component libraries * Builder mentality with high ownership and strong product thinking * Comfortable operating in ambiguity and shaping problems, not just implementing requirements * Strong communication and collaboration skills in cross-functional environments * Curiosity around AI-driven interfaces and how intelligent workflows change product experiences API DOCUMENTATION For engineers, API design and structure are an important part of evaluating a role. You can explore our API and how we build products here: https://docs.fonoa.com/ TECH STACK We use these technologies today, but we don’t hire for specific tools. We care about engineers who can understand problems, make good technical decisions, and choose the right tools for the job. * Backend: Node.js, Go * Frontend: React, TypeScript * Infrastructure: GCP, k8s, Terraform, Postgres Note: If you don’t think you have the full experience we’re looking for, but you could be a fit and are willing to learn, do apply anyway! We are building a diverse and inclusive team. As part of the recruitment process at Fonoa, we process your personal data in accordance with our Privacy Notice for Job Applicants. This notice explains how and why your data is collected and used, and how you can contact us if you have any concerns.