Software Engineer III (JavaScript)

TL;DR

Software Engineer III (JavaScript): Design high-performance, distributed, low-latency systems for an ad exchange handling over 380 billion requests daily with an accent on traffic quality, malware detection, and infrastructure efficiency. Focus on architecting features, optimizing scalability and stability, and collaborating with distributed product and UX teams.

Location: Remote (Krakow, Poland)

Salary: 17,708–19,792 PLN gross/monthly (employment) OR 147–164 PLN net/hourly (B2B)

Company

Digital advertising technology company building cloud-based ad marketplaces connecting publishers and advertisers across all screens.

What you will do

• Design high-performance, distributed, low-latency systems
• Architect, create, and deliver new features and functionality
• Work with Product to drive requirements and own projects end-to-end
• Collaborate with Product and UX teams for consumer-grade enterprise experiences
• Work with distributed Engineering and Product teams across locations
• Analyze and improve efficiency, scalability, and stability of servers and processes
• Identify and remove unnecessary complexity

Requirements

• Communicative Polish and English
• 4+ years experience building SaaS applications using JavaScript/TypeScript
• Experience with React and Node.js
• Experience with database system design, RDBMS, or NoSQL

Nice to have

• Experience with Google Cloud Platform or Amazon Web Services
• Experience in digital media, marketing technology, or advertising technology
• Good written and oral communication skills
• Team player and self-starter
• Ability to rapidly learn new systems

Culture & Benefits

• Flexible working hours and remote work option
• Annual performance bonus
• Private health care and life/travel insurance for you and family
• MultiKafeteria program, training via LinkedIn Learning and tech workshops
• Holiday allowance, pension scheme (PPK), additional paid day off
• Monthly work-from-home allowance, home office setup payment, free parking
• Peer-to-peer recognition and celebration of personal milestones