Senior Software Engineer, Campaign Automation & Optimization

Senior Fullstack Engineer

Company: Smartly
Location: Helsinki, Finland (Hybrid - 3 days/week in office)
Team: Autopsy

About Smartly:

Smartly is an AI-powered advertising technology company transforming ad experiences for brands and consumers. Our comprehensive platform integrates media, creative, and intelligence, delivering tangible business outcomes. Recognized as a Leader in The Forrester Wave for Creative Advertising Technologies, Smartly manages creative and media for over 700 brands worldwide, handling $6B in ad spend across major platforms. We are a multinational and diverse team of 750+ professionals across 13 countries, committed to an inclusive environment.

About the Role:

As a Senior Fullstack Engineer in Team Autopsy, you will build automation and optimization capabilities that help customers save time, improve campaign performance, and reduce manual ad management at scale. Team Autopsy owns core services like Triggers, Ad Rotation, Smartly Actions, and Action Router, enabling customers to automate campaign management and optimize performance. As an independent fullstack team, we collaborate closely with product managers, designers, and other engineering teams to deliver scalable solutions.

Technology Stack: TypeScript, Node.js, NestJS, Koa, PostgreSQL, Redis, Kubernetes, React.

What You Will Do:

• Design, build, and maintain backend services and frontend applications for campaign automation and optimization.
• Contribute to technical and architectural decisions to enhance scalability, reliability, and developer experience.
• Develop and evolve core services such as Triggers, Ad Rotation, Smartly Actions, and Action Router.
• Collaborate with product managers, designers, and engineers to deliver customer-centric solutions.
• Own projects from planning through implementation, balancing immediate needs with long-term maintainability.
• Improve system quality through automated testing, monitoring, and continuous improvement of engineering practices.
• Mentor engineers through code reviews, knowledge sharing, and technical collaboration.
• Help shape Smartly’s target architecture through cross-team initiatives and platform improvements.

What We Are Looking For:

• Strong experience building backend services with TypeScript and Node.js.
• Experience developing modern React applications using TypeScript.
• Solid understanding of distributed systems, APIs, microservice architectures, and cloud-native development practices.
• Experience writing and maintaining unit, integration, and end-to-end tests (e.g., Jest).
• Ability to independently drive projects from problem definition to delivery.
• Strong communication and collaboration skills, with experience working across multiple teams.
• A mindset focused on customer value, pragmatic problem-solving, and continuous improvement.
• Interest in mentoring and supporting the growth of other engineers.
• Ability and willingness to work from our Helsinki office three days per week.

What We Offer You:

• Inclusive Global Culture: Join a diverse team of 750+ professionals across 13 countries, with a culture built on trust, transparency, and open feedback.
• Global Impact: Contribute to a company making a significant global impact on customer success and business growth.
• Focus on Wellbeing: Healthcare packages, mental health services, and a commitment to work-life balance.
• Comprehensive Rewards: Equity options, performance-based rewards, competitive compensation, and career development opportunities.
• Flexible Hybrid Workplace: Balance office collaboration with remote work, with the option to work abroad for up to 30 days annually.

Apply Now and Build Your Future with Smartly!

Visit Smartly's Careers page to learn more about our culture and impact.