Senior Full-Stack Engineer

What We Do at Onsights

Onsights is a venture-backed AI startup focused on bringing e-commerce analytics to brick-and-mortar mall operators, retailers and shopping centers. We are tackling a $17 trillion market by building the world’s most accurate location-intelligence solution that helps our customers understand the behavior of every visitor to their location: where they go, what they do and most importantly why.

Onsights’ patented AI technology has been developed over the past five years by a world-class team with backgrounds in AI, data, hardware, enterprise software and gaming. We have successfully deployed solutions to government agencies and are seeing unprecedented interest in our solution from large enterprise customers. Onsights is backed by leading investors and supported by advisors in the commercial real estate space, including Gula Tech Adventures, New North Ventures and Scout Ventures.

Onsights is looking for curious minded professionals who are passionate about developing themselves in a collaborative team setting where individual strengths are valued and utilized. We are a culturally and geographically diverse team, with approximately 25 team members across five US states and three countries.

Full-Stack Engineer 

About the Role
Onsights is an AI startup bringing advanced e-commerce analytics to brick-and-mortar retail. We’re looking for a remote, full-time B2B Full-Stack Engineer with strong backend skills and B2-level English. You’ll help design, build, and scale our core systems, working closely with backend, frontend, and data science teams on high-performance data collection and analytics platforms.

What You’ll Work On

• Backend APIs in Kotlin using Spring Framework

• Scalable services for data ingestion and processing

• SQL/NoSQL databases (performance & reliability)

• Integrations with internal and external systems

• Security, stability, and scalability of our platforms

• Code reviews and mentoring junior engineers

Tech Focus

• 70% Backend: Kotlin, Spring, Java

• 20% Databases: SQL/NoSQL, optimization, performance

• <10% Frontend: React 

• Plus Typescript, Python, AWS (EC2, S3, SQS, EventBridge)

What We’re Looking For

• Bachelor’s in Engineering or related field + 6+ years full-stack experience, or Master’s + 5+ years

• Expertise in media streaming technologies, services, protocols, and formats

• Experience with Spring, .NET, and frontend development with React

• Proficiency in Java/Kotlin, Typescript, SQL, Python

• Hands-on experience with AWS (EC2, S3, SQS, EventBridge)

• English at B2 level

Recruitment Process (Smooth & Transparent)

1. Chat with Agata (Recruiter)

2. Talk with Joe (Leader of Engineering Team)

3. Deep technical session with Kuba & Mikołaj

4. Live coding with one of our engineers

5. Final discussion with Matt (Senior Leader)

Total Rewards Package for Our US Employees

• Competitive salary
• Comprehensive benefits package
• 401k with a 5% company match
• Equity
• Paid Holidays and Unlimited PTO
• 4 months paid parental leave
• Remote work environment
• Flexible work schedule
• Patent Bonus Program
• Employee Referral Bonus Program
• Learning and Development Program
• Opportunity to work with a team of creative, motivated and fun team members!
• Innovative projects at the intersection of AI, data and retail

Total Rewards Package for Our Contractors

• Competitive compensation 
• Flexible working hours and 100% remote work
• Team member referral bonus
• Opportunity to work with a team of creative, motivated and fun team members!
• Innovative projects at the intersection of AI, data, and retail

Quick Note on Role Fit

If you think you have what it takes to fulfill this opportunity, but don't necessarily check every box , please still connect with us at talent@onsights.io. Feel free to submit a cover letter with your application so we can get to know you better!