Senior TypeScript/Vue.js Developer (Swedish Ad Platform)

Are you passionate about building scalable, high-performance front-end solutions? At Sigma Software, we are looking for a Senior TypeScript/Vue.js Developer to join our distributed team and help shape the future of a next-generation AdTech platform. You will work alongside talented engineers and contribute to transforming a complex monolithic system into a modern, API-driven architecture.We at Sigma Software value innovation, collaboration, and professional growth. Joining us means working on impactful projects with global reach, while enjoying a supportive environment that encourages learning and knowledge sharing.CustomerOur Customer is a Swedish AdTech company that transforms the way publishers and advertisers interact. They provide state-of-the-art self-serve advertising platforms that enable seamless, direct transactions between advertisers and some of the world’s largest publishers. Their mission is to make advertising more accessible, automated, and efficient through innovative technology. Together, we serve globally recognized clients, including TripAdvisor, Bloomberg, The Washington Post, Opera, Dow Jones, etc.ProjectThe project represents a strategic transition to a Platform-First, API-driven architecture. The company is moving away from monolithic, client-specific codebases to a standardized ecosystem. As a Senior TypeScript/Vue.js Developer, you will be the technical visionary for the platforms, ensuring the technology remains high-performing and scalable.ResponsibilitiesDefine and lead front-end architecture strategy using Vue 3 with TypeScript, focusing on modularity, scalability, and performanceCollaborate with the Platform Team to design, document, and enforce API contracts optimized for low-latency AdTech requirementsParticipate in system design to align front-end requirements with back-end architecture, supporting complex UI states and asynchronous data flowsPartner with DevOps to deploy and scale front-end solutions in AWS, ensuring smooth integration within a microservices ecosystemMentor and guide engineering teams, promoting an API-first mindset and rigorous TypeScript usageRequirementsAt least 7 years of hands-on experience in JavaScript and modern front-end developmentStrong expertise in Vue.js and TypeScript, including deep knowledge of Vue 3 Composition APIProven ability to collaborate with back-end/platform teams to design robust API contracts and manage complex data orchestrationExperience deploying and scaling front-end applications in AWS environmentsHands-on experience with Vite and modern testing tools (Cypress, Vitest)Solid AdTech domain knowledge, including advertising data models and workflowsUpper-Intermediate English proficiencyPersonal ProfileStrong leadership and mentoring skillsExcellent communication and collaboration abilitiesAnalytical mindset with a focus on scalability and maintainability