AdTech Client #1 | Senior Full Stack Developer

SD Solutions; Warszawa; On-site; PLN 120,000 - 150,000; Full time

Job summary

SD Solutions is looking for a talented Senior Full-Stack Developer to lead the end-to-end development process for a large-scale advertising technology platform. In this role, you will design and implement backend services using Java (Spring Boot), build modern frontend applications with Angular (15+), and ensure robust system architectures.

The ideal candidate has over 5 years of experience in enterprise web applications, a solid understanding of REST APIs, and is passionate about learning new technologies. Join us to contribute to innovative audience intelligence and campaign automation tools for brands worldwide.

Qualifications

• 5+ 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.
• Highly motivated team player with strong interpersonal skills.
• Self-starter, able to work independently and multitask effectively.

Responsibilities

• Own the end-to-end development process from design to production.
• Design and implement scalable backend services in Java and NestJS.
• Build RESTful and event-driven APIs.
• Develop reliable systems supporting publisher management and reporting.
• Write high-quality, testable code and improve observability.

Skills

Java (Spring Boot)

Node.js (TypeScript, NestJS)

Angular (15+)

REST APIs

Clean architecture principles

Relational databases (MySQL, Redis)

Non-relational databases (Elasticsearch, Vertica)

Education

BSc in Computer Science or equivalent

Job description

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

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 helping drive 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 publisher 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

• 5+ 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.