Join a product-focused engineering team developing a large-scale AdTech platform used for managing and optimizing digital advertising campaigns across multiple channels.
We are looking for a Strong Middle / Senior Full Stack Developer with strong TypeScript expertise, solid Back-end development experience with NestJS, and hands-on Front-end experience with ReactJS. In this role, you will work on enterprise-level solutions with complex business workflows, media processing pipelines, and deep integrations with advertising ecosystems.
We at Sigma Software offer the opportunity to work on technically challenging products, collaborate with experienced engineering teams, and contribute to scalable solutions used in a dynamic digital advertising domain.
CUSTOMER
Our Customer is an international company operating in the digital advertising and AdTech industry. The company develops enterprise-grade technology solutions that help advertisers and media organizations manage, optimize, and scale digital advertising campaigns. Their products support high-load advertising operations, complex workflows, and media-related processes across modern advertising ecosystems.
PROJECT
The project is a large-scale advertising campaign management platform covering the full lifecycle of digital campaigns. The solution includes campaign creation and configuration, line-item management, creatives handling, forecasting, SLA tracking, and integrations with external advertising and media services. The platform also supports advanced media workflows such as video transcoding and image validation.
The engineering team is focused on building scalable and reliable enterprise solutions with sophisticated business logic and multiple integrations while continuously improving performance, maintainability, and operational efficiency.
Job Description- Design, develop, and maintain scalable Full Stack applications using JavaScript, TypeScript, NestJS, and React
- Implement and support complex business logic related to digital advertising campaign management
- Participate in technical discussions, architecture decisions, and solution design activities
- Collaborate closely with developers, Architects, QA engineers, and Project Managers
- Improve application performance, scalability, reliability, and maintainability
- Develop clean, maintainable, and well-tested code following software engineering best practices
- Identify technical challenges proactively and drive solutions independently
- Contribute to continuous improvements in development processes and technical standards
- 4-5+ years of commercial software development experience with JavaScript and TypeScript, with a primary focus on back-end development
- Strong Back-end development experience with NestJS
- Solid Front-end development experience with ReactJS
- Hands-on experience with AWS cloud services
- Good understanding of scalable system architecture and software engineering best practices
- Experience working with enterprise-level or high-load applications
- Strong problem-solving and analytical skills
- Ability to work independently and take ownership of technical solutions
- Good communication and collaboration skills
- Upper-Intermediate or higher English level
WILL BE A PLUS
- AI-native development experience
- Familiarity with AI-powered development tools such as Claude and Codex
- Experience with Jenkins
- Experience with Terraform
- Experience working with complex or enterprise platforms
PERSONAL PROFILE
- Proactive and self-driven mindset
- Strong ownership attitude
- Team-oriented and collaborative approach
- Ability to work effectively in a fast-paced engineering environment
- Strong attention to code quality and technical excellence
Skills Required
- 4-5+ years of commercial software development experience with JavaScript and TypeScript, primarily focused on back-end development
- Strong back-end development experience with NestJS
- Solid front-end development experience with ReactJS
- Hands-on experience with AWS cloud services
- Understanding of scalable system architecture and software engineering best practices
- Experience with enterprise-level or high-load applications
- Strong problem-solving and analytical skills
- Ability to work independently and take ownership of technical solutions
- Good communication and collaboration skills
- Upper-Intermediate or higher English level
- AI-native development experience
- Familiarity with AI-powered development tools such as Claude and Codex
- Experience with Jenkins
- Experience with Terraform
- Experience working with complex or enterprise platforms
What We Do
Sigma Software Group, an award-winning and trusted IT partner, has been serving customers for over 21 years, providing comprehensive IT solutions to various businesses, ranging from startups to established software product houses. As one of Europe's substantial IT consultancies, it brings together a dedicated workforce of over 2,100 professionals in 40 offices across 19 countries. With a diverse client base, including more than 300 enterprises, including Fortune 500 stalwarts, Sigma Software Group is a preferred choice for developing solutions that help businesses create cutting-edge products while meeting their unique needs. Sigma Software Group operates as a dynamic ecosystem of tech companies, offering 25 ready-to-implement innovative products and 40+ value-added services. Furthermore, Sigma Software Group is committed to fostering innovation through initiatives such as the Sigma Software Labs business incubator, Sigma Software University, the SID Venture Partners VC Fund, UA Tech Network, Techosystem, the European Business Association, and other collaborative efforts. Since 2015, Sigma Software Group has consistently earned recognition on the IAOP's prestigious World's Top 100 Outsourcing list. The company's accomplishments have also been acknowledged by prominent global media outlets such as Forbes, CNBC, The Times, and Reuters
