Senior Fullstack Engineer - Typescript/React/Node

fonio

ÜBER FONIO Wir bauen KI-Telefonassistenten für kleine und mittelständische Unternehmen – damit keiner ihrer Anrufe mehr verloren geht und sie sich auf das Wesentliche konzentrieren können. Unsere KI beantwortet jeden Anruf automatisch. Aber Voice ist erst der Anfang. Unsere Vision ist es, das erste vollautomatisierte CRM-System der Welt zu entwickeln. 8.000+ Kunden. >€5M ARR. ~30% monatliches Wachstum. Ziel bis EOY: €30M. Wir leben Ownership. Du bist für deine Projekte und Aufgaben end-to-end verantwortlich. Keine Politik, wenige Meetings, direktes Feedback. Bei fonio wirst du gemeinsam mit den smartesten und ambitioniertesten Menschen weit und breit bauen. Bewirb dich jetzt und werde Teil einer der krassesten Wachstumsstorys Europas!   DEINE ROLLE Als Senior Fullstack Engineer übernimmst du End-to-End Ownership: von der Idee über den Prototyp bis hin zum fertigen Feature, das von tausenden Unternehmen europaweit genutzt wird.   WEN WIR SUCHEN Senior Fullstack Engineers bei fonio haben volle Ownership über den value, den sie für unsere Kunden stiften. Es gibt bei uns niemanden, der dir sagt was Du bauen sollst - das definierst Du selbst. * Extremes Growth Mindset * Viel Erfahrung mit TypeScript, React und Node.js (idealerweise NestJS) in einem SaaS-Produkt * Pragmatismus: Du zerlegst Features in die essenziellen Teile, die sofort Kundennutzen schaffen - und entwickelst sie mit neuen Erkenntnissen weiter * Deutsch als Muttersprache, um unsere KI aktiv mitzugestalten, sowie fließend Englisch.   DEINE AUFGABEN * Weiterentwicklung unserer Plattform in NestJS & React * Direkter Austausch mit Kunden (Support, Feedback, User-Tests) * Mittelfristig: Übernahme der Feature / Opportunity Priorisierung unserer Voice AI   WAS WIR DIR BIETEN * Kompetitives Gehalt: €80.000-€120.000 pro Jahr * 100% Remote: Falls du aber Lust auf Office hast, haben wir eines der coolsten Offices im 7. Bezirk in Wien (Lunch & Dinner included) * 100% Focus Time (keine regulären Meetings) * Unlimited Budget, wenn der ROI stimmt * Extremer Speed (wir shippen fast täglich) * Tausende begeisterter Kunden, die das Produkt gemeinsam mit uns entwickeln.   BEWERBUNGSPROZESS 1. 15 min Kennenlernen 2. 30 min Deep Dive mit CTO & Co-Founder Matthias 3. 90 min Technical Interview mit Case Study / Live Coding 4. 20 min Culture Fit mit den Gründern

Smartly

We’re looking for a Senior Fullstack Engineer to join Smartly and help shape the future of our multi-channel advertising platform. You’ll be working on expanding Smartly into both new and existing advertising channels. Depending on the team, this can mean greenfield development of new integrations or evolving and scaling established ones like Pinterest. While we can’t share all the details yet, this is a highly strategic area for the company with strong leadership visibility and direct revenue impact. Whether you’re building something new or improving existing integrations, the work goes beyond incremental changes. You’ll be building new capabilities, improving existing ones, and helping shape how different channels are integrated into our platform at scale. In this role, you’ll design systems that power automation for some of the world’s largest advertisers. You’ll work closely with partners like Google, Reddit and Spotify, building deeply integrated solutions that enable customers to launch, optimize, and iterate campaigns efficiently. You’ll also have the opportunity to explore how AI and automation shape the future of ad tech, and turn those ideas into production-grade systems. This role is about ownership and technical influence. You’ll contribute to architectural direction, make trade-offs that balance scalability and product needs, and collaborate across teams to create a unified platform experience across channels. We’re hiring for multiple positions across a range of seniority levels, and we’ll align the role scope and level based on each candidate’s experience during the hiring process. Our tech stack * Backend: Node.js, TypeScript * Frontend: React, TypeScript * Infrastructure: PostgreSQL, RabbitMQ, Redis, Kubernetes * Architecture: Distributed systems, event-driven services, large-scale data processing WHAT YOU’LL DO * Own the design and implementation of new platform integrations end-to-end * Design and operate distributed, data-intensive systems and microservices at scale * Build automation systems that process large volumes of campaign and performance data * Develop and evolve client-facing APIs and backend services * Drive architectural decisions and contribute to long-term technical direction * Work across teams to align on shared patterns and unify channel behavior within the platform * Partner closely with product and design to shape solutions, not just implement them * Mentor other engineers and raise the bar for engineering quality and practices WHAT WE’RE LOOKING FOR * Strong experience building and operating production-grade systems with Node.js and TypeScript * Solid frontend experience with React and modern web development practices * Experience designing distributed systems and working with asynchronous, event-driven architectures * Proven ability to build scalable systems that handle high data volumes * Ability to take ownership of complex problems and drive them from concept to production * Strong collaboration skills and experience working across teams and disciplines * Interest in mentoring and contributing to team-level engineering practices * Ability and willingness to work in a hybrid setup from our Helsinki office (3 days per week)   WHAT WE OFFER YOU At Smartly, we offer a place where you can advance your career. Here, you'll find: An Inclusive Global Culture: Join a team of over 750 Smartlies, representing more than 60 nationalities across 24 locations in 13 countries. We cultivate a culture built on trust, transparency, and open feedback, where diverse perspectives are valued and encouraged. Global Impact: Contribute to a company making a global impact, directly influencing our customers' success and business growth. Focus on Wellbeing: We prioritize your health with healthcare packages, mental health services, and a commitment to work-life balance through paid holidays and family leave. Comprehensive Rewards: Benefit from equity options, performance-based rewards, competitive compensation, and career development opportunities. Flexible Hybrid Workplace: Experience a hybrid work model, balancing office collaboration with remote work, and the option to work abroad for up to 30 days annually.   Apply Now and Build Your Future with Smartly! Curious what it’s like to work at Smartly? Visit our Careers page to see how we grow, collaborate, and make impact together #LI-HYBRID ABOUT SMARTLY Smartly is the AI-powered advertising technology company transforming ad experiences for brands and their consumers. Our comprehensive advertising platform seamlessly integrates the capabilities of media, creative, and intelligence to power more than 800 billion impressions and generate more than 300 billion creatives annually, delivering tangible business outcomes for brands and advertisers. Smartly is the only company in the industry recognized as a Leader in The Forrester Wave: Creative Advertising Technologies with PwC validating the results it delivers for brands. We manage creative and media for 700+ brands worldwide and $6B in ad spend across the largest media platforms, including Facebook, Google, Instagram, Pinterest, Snap, and TikTok. Our end-to-end technology, unmatched access to media platforms and exceptional customer service help Fortune 500 brands to reach and engage consumers and learn what performs best.Smartly is a multinational and diverse team of 750+ Smartlies from 60+ nationalities, working in 13 countries. Together, we want to create and maintain an inclusive environment where everyone feels respected and heard. Our Diversity, Equity & Inclusion approach is at the heart of it. Visit Smartly to learn more. The processing of your information is described in our Candidate Privacy Notice.

Vizzia

🎯 CONTEXT Vizzia deploys connected cameras and smart infrastructure for 250+ local authorities across France. Behind the product that local cities see sits a less visible but equally critical layer: the platform that keeps the fleet running. The DLM team builds and maintains that layer. FleetAPI, drift detection, the status engine, internal tooling for Ops and Hardware teams, provisioning workflows — if a camera is misconfigured, if a fleet is drifting, if an operator needs to act fast, it's this team's stack that makes it possible or not. 🛠️ WHAT YOU'LL DO You will develop and maintain the internal tools used daily by Ops and Hardware teams : 1. Build and maintain backend services * Design and ship features on internal dashboard (Node.js, TypeScript, React). * Write clean REST APIs with proper OpenAPI specs. * Work on event flows and data pipelines where needed (the team uses AWS). * Contribute to infra-adjacent work alongside the senior cloud engineer (CDK, AWS). 2. Ship frontend where it matters * Develop interfaces in React & Tailwind (or equivalent libs) for internal clients. * The team isn't looking for a frontend specialist, but you need to be comfortable enough to own your front without handholding. 3. Contribute to architecture and process discipline * Challenge specs coming from the Tech Lead & PM, raise concerns early, not after. * Participate in code reviews, architecture proposals, incident response within your perimeter. * Tickets are contracts: requirements are delivered or escalated before shipping. * Mentor future junior hires as the team grows. ✅ WHO YOU ARE * You have a solid full-stack experience in production environments, with solid TypeScript / Node.js and real React or Vue usage. * You've shipped features end-to-end and owned an area, including the boring parts: monitoring, on-call, post-incident reviews. * You have knowledge of AWS in production (Lambda, S3, RDS) and some exposure to IaC (Terraform or CDK). * You operate well within a scope set by a Tech Lead and a PM. You surface ideas through the right channels and treat ticket requirements as commitments. * French preferred; fluent technical English is fine. If you've worked on IoT, fleet systems, or internal tooling before, that's a strong signal. It's not a prerequisite. COMPENSATION & BENEFITS * 💸 BSPCE + 60–75k€ gross annual, depending on profile * 🏡 Hybrid work (3 days minimum on-site, Paris 9th) * 🏝 Contrat cadre and RTT (between 8 and 12 days per year depending on public holidays) * 💻 A Mac or PC depending on your preferences * 🍜 60% coverage of meal vouchers worth €9 per worked day * 🚃/🚲 Sustainable mobility allowance * 🏥 Mutuelle (Alan) * 💼 Offices located in central Paris (9th arrondissement) * ☀️ Annual offsite with the whole team and plenty of company events If you've read this far, you're probably very interested in the role and/or Vizzia. We'd like to hear from you even if you feel ou don't check every box.