Full Stack Node.js Developer
Why does MWDN rock?
MWDN connects exceptional tech talent with leading companies across Israel, the USA, Great Britain, and Western Europe. We aim to ensure our employees enjoy a rewarding and secure experience while collaborating with prestigious international clients.
Here’s what you can expect when you get employed by MWDN:
- Security first. We vet our clients to eliminate risks, ensuring reliability and timely payments for your hard work—no fraud or unforeseen events here!
- Career support. If a match isn't right, we're here for you. We actively assist our employees in finding new opportunities that fit their skills and aspirations.
- Legal assistance. We provide guidance on legal matters (e.g., opening and administering your private entrepreneur account, taxes, army enrollment, etc.).
- Professional development. We offer English courses and other engaging activities, including team-building events.
Why choose us? MWDN is ranked among the top 5 IT employers in our region by DOU, and we pride ourselves on our transparency and commitment to our team. Curious to learn more? Discover what our employees say about us in their DOU reviews: MWDN reviews.
What is your new project?
A fast‑growing ad‑tech company building next‑generation programmatic advertising infrastructure. The team focuses on high‑performance systems, real‑time bidding, and AI‑driven optimization. The environment is fast, product‑focused, and highly collaborative, with strong engineering leadership and a culture of ownership.
What makes this project exciting?
We're looking for a Senior Full Stack Developer to join our engineering team and help shape the future of programmatic advertising. You'll architect and build high‑performance systems that process millions of ad transactions in real time, while leveraging cutting‑edge AI technologies to optimize outcomes for our partners.
This role sits at the intersection of ad‑tech and AI, working with massive‑scale systems and sub‑millisecond latency requirements. You’ll own the full development lifecycle — from architecture to deployment — collaborating with a modern, high‑performing engineering team.
What makes you a great fit
- 5+ years of software development experience
- Strong JavaScript/TypeScript, React, Node.js
- Python experience for backend/data processing
- Experience with high‑performance distributed systems
- Strong understanding of REST APIs and microservices
- Cloud experience (AWS/GCP)
- SQL/NoSQL and streaming technologies
- Excellent problem‑solving and autonomy
- Strong communication and collaboration
Preferred Qualifications:
Ad‑Tech Experience (Strong Advantage)
- Programmatic advertising & OpenRTB
- Hands‑on SSP/DSP experience (Xandr, Magnite, PubMatic, Index Exchange)
- Prebid.js / Prebid Server / header bidding
- Auction mechanics & bid optimization
AI‑Native Experience (Strong Plus)
- Building applications powered by LLMs
- Agentic workflows (LangChain, LangGraph)
- Deploying/serving ML models
- Prompt engineering & RAG architectures
- Vector databases & embedding search
Our Tech Stack
- Fresh and open for you to define
Why work with us?
- People-oriented management without bureaucracy
- The friendly climate inside the company is confirmed by the frequent comeback of previous employees
- Flexible working schedule
- 26 paid time off (18 working days per year, plus 11 days - all national holidays)
- 10 sick leave days
- Full financial and legal support for private entrepreneurs
- Free English classes with native speakers or with Ukrainian teachers (for your choice)
- Dedicated HR
Our next steps
✅ Intro call with a Recruiter — ✅ Intro interview with the team — ✅ Client interview — ✅ Offer