OpenX
digital advertising
SoftwareEngineerIII(JS/TS)
Neural analysis suggests this role is
optimal for Mid candidates.
“Software Engineer III (JS/TS) at OpenX. Skills: TypeScript, React, Python, REST APIs, frontend development, API development. Design and build high-quality, maintainable user interfaces using JavaScript/TypeScript and React. Develop and maintain Python-based backend APIs that support frontend workflows and product capabilities”
What You'll Achieve.
unleashing the full economic potential of digital media companies; making digital advertising markets and technologies that are designed to deliver optimal value to publishers and advertisers on every ad served across all screens; operate at a scale where performance, reliability, correctness, and every millisecond matter; building tools and workflows that help users manage advertising transactions; help users configure business rules, review transaction setup, and keep platform behavior aligned with business agreements and financial processes; deliver reliable product experiences for enterprise users; drive results
Industry & Context.
Solving important problems in a scale; proactive problem-solvers; take initiative without needing external motivation; continuously think about the next steps and opportunities for improvement; intellectual acumen to understand the complexities of our organization and industry
What They're Looking For.
Must Have
4+ years of professional software engineering experience, Experience building web applications with JavaScript or TypeScript, Hands-on experience with React and modern frontend architecture, Solid understanding of component-based development, state management, API integration, and frontend performance, Experience designing and developing REST APIs or contributing to backend services, preferably in Python, Practical understanding of databases and backend data flows, Commitment to software quality, including writing automated tests where appropriate, ownership mindset and ability to collaborate effectively with Product, UX, QA, and Engineering, Communicative Polish and English languages
Nice to Have
Experience with advertising technology, marketing technology, digital media, marketplace platforms, financial workflows, or revenue-related systems, Experience with GraphQL, Experience with cloud-based systems such as Google Cloud Platform, AWS, or Azure
What You'll Do.
Design and build high-quality
maintainable user interfaces using JavaScript/TypeScript and React
Develop and maintain Python-based backend APIs that support frontend workflows and product capabilities
Translate business rules
and data dependencies into intuitive user experiences and reliable API integrations
Own features end-to-end
from requirements and technical design through implementation
and operational quality
Write and maintain automated tests as part of the development process
Improve the usability
and maintainability of existing systems
Contribute to technical direction
and engineering practices within the team
How You'll Work.
Team & Collaboration
cross-functional product engineering team; collaboration with UX designers; direct access to product context; influence both technical and user-facing decisions; Collaborate closely with Product, UX, QA, and Engineering to deliver reliable product experiences for enterprise users; Collaboration with Product, UX, QA, and Engineering; code reviews; engineering communities of practice; We are one team; We respect and care about our colleagues; We understand and respect what each of us does; We are eager to teach and share what we know with others; We are eager to learn from others and we ask questions internally and externally; Ideal team players are humble and demonstrate integrity; They put the team's success above their own, share credit generously, and value collective achievements; They are interpersonally intelligent, good communicators, and exemplify sound judgment in their interactions across the company to foster a collaborative environment
Communication Scope
Communicative Polish and English languages; good communicators
Process & Methodology
Own features end-to-end, from requirements and technical design through implementation, testing, rollout, and operational quality
Full Job Description
## Description Company at a Glance OpenX is focused on unleashing the full economic potential of digital media companies. We do this by making digital advertising markets and technologies that are designed to deliver optimal value to publishers and advertisers on every ad served across all screens. At OpenX, we have built a team that is uniquely experienced in designing and operating high-scale ad marketplaces, and we are constantly on the lookout for thoughtful, creative executors who are as fascinated as we are about finding new ways to apply a blend of market design, technical innovation, operational excellence, and empathetic partner service to the frontiers of digital advertising. About the role You will join the Core Exchange development team at OpenX. Our exchange handles billions of ad requests every day, connecting thousands of publishers with demand partners across the global advertising ecosystem. The platform runs in the cloud across multiple regions and operates at a scale where performance, reliability, correctness, and every millisecond matter. The role focuses on building tools and workflows that help users manage advertising transactions. These tools help users configure business rules, review transaction setup, and keep platform behavior aligned with business agreements and financial processes. This is a frontend-first engineering role with meaningful API ownership. Most of your work will focus on building high-quality user interfaces in TypeScript, primarily with React, while also contributing to Python-based APIs that support the product experience end-to-end. In practice, we expect the work to be roughly two-thirds frontend development and one-third API/backend development. Prior AdTech experience is helpful, but not required. Team setup You will join a cross-functional product engineering team with a dedicated Product Manager, Scrum Master, Engineering Manager, QA engineers, frontend and backend engineers, and regular collaboration with UX desi
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