Key Facts

Remote From:

Poland

Full time

Senior (5-10 years)

2 - 106K yearly

English

Hard Skills

Other Skills

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Communication
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Adaptability
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Teamwork
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Mentorship
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Problem Solving

Job description

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.

Senior Backend Engineer - Kotlin

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 Senior Backend Engineer with strong backend skills and B2-level English. You’ll help design, build, and scale our core systems, working closely with DevOps, frontend, and data science teams to deliver 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

75% Backend: Kotlin, Spring
25% Databases: SQL/NoSQL, optimization, performance
Plus Python, Docker, Shell, AWS (EC2, S3, SQS, EventBridge)

Core qualifications

6+ years of software engineering experience, with at least 4 years focused on programming in Kotlin or Java
Experience with the Spring framework, in particular Spring Boot
Proficiency in Kotlin and SQL
Hands-on experience with the development of backend services using the AWS ecosystem
Experience with any messaging/data bus/queueing system (Kafka, RabbitMQ, SQS, EventBridge, etc.)
Experience with modern coding tools like GitHub Copilot
Proven ability to design and lead technical initiatives
English at B2 level

Bonus qualifications - not required but relevant

Expertise in media streaming technologies, services, protocols, and formats
Experience with Dagster or other data orchestration/pipeline tool
Experience developing solutions in/for the e-commerce or retail industries
Experience working with 3D point cloud data
Experience working at a SaaS startup

Recruitment Process (Smooth & Transparent)

Chat with Agata (Recruiter)
Talk with Joe (Leader of the Engineering Team)
Live coding with one of our engineers
Deep technical session with Kuba & Mikołaj
Final discussion with Michael (Senior Leader)

Total Rewards Package for Our Contractors

Competitive compensation: $45 - $55/hr
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!