Front-End Developer (Swedish Ad Platform)

Are you passionate about building high-performance front-end solutions? Join Sigma Software as a Middle Front-End Developer and help shape the future of cutting-edge AdTech products. This hybrid role is based in Wrocław, Poland, offering flexibility to work partially from the office.
We at Sigma Software partner with a Sweden-based AdTech leader to create scalable, API-driven platforms used by globally recognized publishers. Why join us? You’ll work with modern technologies, contribute to architectural transformation, and grow your skills in a collaborative, innovative environment.
CUSTOMER
Our Customer is a Sweden-based AdTech company specializing in advanced self-serve advertising platforms that automate direct transactions between advertisers and major global publishers. Their technology removes traditional friction in ad sales by enabling automation, transparency, and operational efficiency at scale. Platforms are trusted by internationally recognized publishers including TripAdvisor, Bloomberg, The Washington Post, Opera, and Dow Jones, handling millions of transactions worldwide.
PROJECT
The project is a strategic architectural transformation toward a Platform-First approach. The company is transitioning from monolithic, client-specific implementations to a standardized, API-driven, multi-tenant ecosystem of reusable microservices. These services power the entire product suite, remaining independent, scalable, and decoupled from frontend or customer-specific customization.
Key Technologies: Vue 3, TypeScript, AWS (S3, CloudFront), Vite, Cypress, Vitest
Develop modular, efficient front-end features using Vue 3 (Composition API) and TypeScript
Collaborate closely with back-end and platform teams to integrate APIs seamlessly
Participate in system design discussions to ensure smooth data flows and optimal architecture
Deploy applications in AWS (S3, CloudFront) and optimize for performance and scalability
Write and maintain automated tests using Cypress and Vitest
Share knowledge, mentor peers, and promote best practices within the team
Contribute to continuous improvement of development processes and tools
At least 3 years of commercial front-end development experience
Proven experience with Vue 3 (Composition API) and TypeScript
Strong API integration skills and understanding of complex data handling
AWS deployment experience (S3, CloudFront)
Familiarity with AdTech concepts and industry trends
Knowledge of Vite, Cypress, and Vitest
Good communication skills and ability to work collaboratively in a cross-functional team
Upper-Intermediate English level or higher
WILL BE A PLUS
Experience with microservices architecture
Understanding of CI/CD pipelines
Knowledge of performance optimization techniques for large-scale front-end applications
Familiarity with data visualization libraries
Experience working in distributed teams
PERSONAL PROFILE
Proactive and detail-oriented
Thrives in collaborative environments
Enjoys tackling complex challenges
Passionate about modern front-end technologies
Committed to delivering high-quality solutions