Senior Fullstack Developer, Ad Formats

Senior Fullstack Developer, Ad Formats Are you an engineer who enjoys building new concepts that drive business value? Do you have what it takes to build services that run at large scale in production? At Readpeak, we're looking for a Senior Fullstack Developer to develop and own end-to-end media format services for our programmatic marketing platform, where your work directly affects advertiser outcomes and company revenue. About the Role We're looking for someone with a strong software development background who enjoys the engineering side of building production systems. This is a hands-on role, with a productization twist: writing code, collaborating with stakeholders, building necessary services, validating, monitoring, and continuous improvement. You'll work alongside other engineers and product people, iterating on the product with real traffic. You should be comfortable working with structured data and building low-latency services that turn data into value. And naturally, our development team uses the latest AI tools, experience with AI-enabled development is essential. Responsibilities Design, build, and maintain media services from ingestion through APIs to production deploymentEnsure service security, monitoring, and observability in productionWe expect you to be comfortable working with modern AI development tools and to use them well as part of your everyday workflow.Collaborate with engineers, PO, and data scientists, and help raise the bar for how back-end systems are built and operated in productionIdeate the next generations of ad products and formatsDesign systems that can handle noisy and skewed real-world data Qualifications Computer science fundamentals, software engineering best practices and strong programming skills (Node.js/TypeScript or a similar language, Rust as bonus, with experience running production systems)Experience taking fullstack products from idea to production ownership, including monitoring, iteration, and long-term maintenanceSolid understanding of media formats including video and web content embedding into different user interfaces - apps, news websites, e-commerce storesStrong experience with AWS (ECS/EKS, RDS, SQS, CDK, MediaConvert, CloudFront), comfortable helping out on the infra side when operating at scale4+ years of professional experience in software engineering Required Skills Strong programming skills in Node.js/TypeScript or a similar languageExperience running production systemsExperience with AI-enabled development and modern AI development toolsComfortable working with structured data and building low-latency servicesExperience taking fullstack products from idea to production ownershipSolid understanding of media formats including video and web content embedding into different user interfaces \- apps, news websites, e-commerce storesStrong experience with AWS (ECS/EKS, RDS, SQS, CDK, MediaConvert, CloudFront) Preferred Skills Experience in ad techExperience with real-time or low-latency back-end systemsFamiliarity with media delivery, format optimization, scaling etcExperience with PythonExperience with GitLab Comp Package 500€ HSL commute benefit1-2 company trips per year with the whole team (we just came back from Italy)Free lunch every WednesdayStock options are available, so you'll benefit from the success you help buildWe have an extensive healthcare package for team members working from Helsinki Additional Information This role is Helsinki-based and you should live in the Helsinki capital region or nearbyWe are very relaxed and easy-going, yet focused and hard-workingAs part of the journey, we create great memories with the team that you will never forget Stack you will be working with Node.js/TypeScriptAWS (core infrastructure)PythonGitLabCloudFront About the company Readpeak is one of the most advanced programmatic marketing platforms for native advertising globally. We serve some of the finest brands, like BMW, Bosch, Eurocard and over 2000 more in our target markets. With our headquarters in Helsinki and side offices in Stockholm, Oslo, Copenhagen, Berlin, Paris, the UK and Switzerland, our team consists of ambitious but relaxed international industry experts. With over 8 billion ads served a year in the Nordics alone and a growth rate over 50% year-over-year, our platform generates massive datasets and complex engineering challenges. We are searching for an engineer capable of developing new, innovative concepts for products that drive more intelligent and high-performing advertising solutions. Our back-end systems are a core component of our product vision. They directly influence how ads are delivered, how budgets are allocated, and how performance is optimized across billions of impressions. This is complemented by user-friendly interfaces enabling customers to self-serve their marketing needs. We work with fast feedback loops: from idea to validation often takes days, not weeks. Services and system changes can be safely tested against real traffic with a low barrier to experimentation, enabling rapid iteration and measurable impact. This position is for direct candidates only.