AdTech Client #1 | Middle Full-Stack Developer

SD Solutions

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Warsaw, PL / Serbia / Romania Until 9/21/2026 4+ years exp First posted July 23, 2026 Last posted July 23, 2026
Job description

On behalf of AdTech Client #1, SD Solutions is looking for a talented Full-Stack Developer.

SD Solutions is a staffing company operating globally. Contact us to get more details about the benefits we offer.

Responsibilities:

  • You will be responsible for owning our end-to-end development process, from design to production, contributing to platform infrastructure and architectural decisions, and help driving best practices in system design, code quality and AI-assisted development.
  • You will design and implement scalable backend services in Java (Spring Boot) and NestJS (Node.js/TypeScript), build RESTful and event-driven APIs, and develop reliable systems supporting publishers management, bidding logic, reporting, and customer-facing dashboards.
  • You will build and maintain modern frontend applications using Angular (15+), ensuring seamless integration with backend services and consistent UX performance.
  • You will engage in research of core technologies, integrations with external APIs and third-party services, and provide effective solutions to production and scalability challenges.
  • You will write high-quality, testable code (unit, integration, E2E), improve observability (logs, metrics, tracing), and actively participate in design reviews and technical discussions.

Requirements:

  • 4+ years of experience developing enterprise web applications and distributed systems in production
  • Experience designing and implementing scalable web system architectures
  • Solid understanding of REST APIs, async processing, and clean architecture principles
  • Experience monitoring, debugging, and supporting production systems
  • Experience with Java (Spring Boot)
  • Experience with Node.js (TypeScript, NestJS) – advantage
  • Experience with modern UI frameworks (Angular, Vue, React) – big advantage
  • Experience with relational and non-relational databases (MySQL, Vertica, Redis, Elasticsearch)
  • Highly motivated team player with strong interpersonal skills and a “can-do” attitude
  • Self-starter, able to work independently and multitask effectively
  • Passionate about learning new technologies
  • BSc in Computer Science or equivalent

About the company:

A large-scale advertising technology company building audience intelligence and campaign automation tools for brands, agencies, and publishers across multiple digital channels. The platform processes vast data volumes to enable programmatic decisions and measurable business outcomes at a global level.

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About this role

Summary

Develop and maintain scalable web applications, APIs, and systems in a fast-paced ad tech environment

Job title

Full-Stack Developer

Experience level

4+ years

Minimum experience

4+ years exp

Industry

advertising technology

Location requirements

Warsaw, Serbia, Romania; remote work allowed

Salary

Not specified

Management role

No

Skills & keywords

Required skills

JavaSpring BootNode.jsTypeScriptNestJSAngularSQLNoSQL

Preferred skills

VueReactrelational databasesnon-relational databases

Specializations

frontendbackenddistributed systemsAPIsscalability
Locations

Structured locations inferred from the posting.

Serbia

Remote Country

Romania

Remote Country

Warsaw, Poland

On-site City