Senior Software Engineer, Design Systems - Smartly - Helsinki, Finland

Team Duplo is looking for a Senior Software Engineer to help shape the customer experience across Smartly. You'll work on customer onboarding, dashboards, and Design System adoption, helping create a consistent and intuitive experience across our platform. As part of the Platform Functionality (Media) product group, you'll collaborate closely with engineers, designers, and product partners to improve how customers discover value in Smartly and become long-term successful users. What You Will Do Extend and maintain Smartly's Design System library to support consistent user experiences across the platform. Partner with designers to improve UI development workflows, tooling, and collaboration practices. Drive Design System adoption across existing product areas by improving shared components and implementation patterns. Own and improve frontend build, release, and deployment processes to support reliable development and delivery. Develop customer-facing features that support onboarding, product adoption, and customer success outcomes. Contribute to frontend architecture decisions, ensuring maintainable, scalable, and high-quality solutions. Work across the Smartly application to surface insights, recommendations, notifications, and alerts that improve customer experience. Collaborate with engineers, product managers, designers, and your Engineering Manager to deliver technical excellence and business impact. What We Are Looking For Strong experience building modern web applications using React and TypeScript. Experience designing and maintaining reusable UI component libraries or Design Systems. Ability to own features and technical initiatives from design through implementation and release. Solid understanding of frontend architecture, performance, accessibility, and maintainability best practices. Experience working with testing frameworks such as Vitest, React Testing Library, or similar tools. Familiarity with backend development using Node.js and TypeScript. Strong collaboration skills and the ability to work effectively with designers, product managers, and engineers. A pragmatic approach to problem-solving and continuous improvement of engineering practices. 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-HYBRIDAbout 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.