AdTech Client #1 | Middle Full-Stack Developer

SD Solutions; Warszawa; On-site; PLN 120,000 - 160,000; Full time

Job summary

SD Solutions is seeking a talented Full-Stack Developer to handle the entire development process from design to production. The role involves building scalable backend services using Java and NestJS while maintaining modern frontend applications with Angular.

Ideal candidates will have 4+ years of experience, a solid understanding of web system architectures, and a passion for learning new technologies. Join a large-scale AdTech company that processes significant data volumes to drive programmatic decisions.

Qualifications

• 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.

Responsibilities

• Own the end-to-end development process from design to production.
• Design and implement scalable backend services in Java and NestJS.
• Build and maintain modern frontend applications using Angular.
• Engage in research of core technologies and provide effective solutions.

Skills

Enterprise web applications development

Java (Spring Boot)

Node.js (TypeScript, NestJS)

REST API design

Modern UI frameworks (Angular, Vue, React)

Relational and non-relational databases (MySQL, Vertica, Redis, Elasticsearch)

Education

BSc in Computer Science or equivalent

Job description

On behalf of AdTech Client #1, SD Solutions is looking for a talented 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 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 systemsExperience 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

Company Overview

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.