Senior Backend Java/Kotlin Engineer E-commerce - remote - ZEN
Opis
We are open to hiring people from Ukraine.We're inviting you to work together on a tool that will help customers worldwide manage their money with zero effort.
Join the ZEN.COM team now and change the world of finance for the better. At ZEN.COM, you will get to work with many exciting new technologies.The Opportunity
Help us design and build an ambitious e-commerce system that helps customers find the right product at the best price.
Together, we'll create solutions that take the complexity out of online shopping and streamline the process, while always keeping the user's best interest at the center.
This is a unique opportunity to work on software that is truly user-focused — built to support people, not manipulate them.
We operate with a startup mindset: a small, senior, fast-moving team. We're energetic, collaborative, and pragmatic.We use AI at multiple layers of the product — you'll both use and shape these production-ready applications and learn a lot along the way.
What you bring:
Deep understanding of the e-commerce domain and its processes, from both the customer and merchant perspective
Expertise in Spring and Java/Kotlin; confidence in building RESTful services and event-driven systems
Strong grasp of good code design principles and testing practices
An open mind for unconventional and creative solutions
Ability to design flexible systems that can support business pivots
Understanding of performance factors and how to ensure a fast, responsive experience for the user
What we offer
Your work becomes the backbone of pricing & availability intelligence used across products and markets
Learning:
Hands-on work with production AI (LLMs, embeddings, agents) and modern data engineering
Team:
Talented, supportive peers; high autonomy and ownership; clear problem statements
Pace & pragmatism:
We ship, measure, and improve
TL;DR checklist:
( ) 4+ years working on e-commerce projects (marketplaces, logistics, shopping, etc.)( ) Understanding of challenges around e-commerce processes( ) Open to experimenting with AI( ) Experience building large service-oriented systems and complex processes( ) Fluent in Spring and Java/Kotlin( ) Experience designing and consuming REST APIs( ) Comfortable with remote-first work
All checked? In that case, send us your CVAnd if you want more details, read on.
Requirements:
4+ years working on e-commerce projects
Understanding of challenges around e-commerce processe
Fluent in Spring and Java/Kotlin
Nice to have:
Experience with AI — both in the systems you build and in the tools you use
Understanding of NoSQL / modern data stores such as MongoDB, Elasticsearch, Neo4j, or BigQuery
Background in building or maintaining high-traffic systems
Understanding of e-commerce at a global scale (across countries and continents)
Knowledge of Python 3.12+
We are open to hiring people from Ukraine.
We're inviting you to work together on a tool that will help customers worldwide manage their money with zero effort.
Join the ZEN.COM team now and change the world of finance for the better. At ZEN.COM, you will get to work with many exciting new technologies.The Opportunity
Help us design and build an ambitious e-commerce system that helps customers find the right product at the best price.
Together, we'll create solutions that take the complexity out of online shopping and streamline the process, while always keeping the user's best interest at the center.
This is a unique opportunity to work on software that is truly user-focused — built to support people, not manipulate them.
We operate with a startup mindset: a small, senior, fast-moving team. We're energetic, collaborative, and pragmatic.We use AI at multiple layers of the product — you'll both use and shape these production-ready applications and learn a lot along the way.
What you bring:
Deep understanding of the e-commerce domain and its processes, from both the customer and merchant perspective
Expertise in Spring and Java/Kotlin; confidence in building RESTful services and event-driven systems
Strong grasp of good code design principles and testing practices
An open mind for unconventional and creative solutions
Ability to design flexible systems that can support business pivots
Understanding of performance factors and how to ensure a fast, responsive experience for the user
What we offer
Your work becomes the backbone of pricing & availability intelligence used across products and markets
Learning:
Hands-on work with production AI (LLMs, embeddings, agents) and modern data engineering
Team:
Talented, supportive peers; high autonomy and ownership; clear problem statements
Pace & pragmatism:
We ship, measure, and improve
,(Build components of a service-oriented ecosystem using a mix of synchronous and asynchronous communication, Design processes that support and connect key parts of the system, Work on AI agents and AI flows that automate data gathering, matching, and processing, Actively participate in workshops on domain design (e.g. event storming), business processes, and UI design (in close collaboration with our UX team), Develop flexible search solutions by combining full-text search, vector search, and graph databases, Build rich knowledge bases that serve as the backbone for our system)
Requirements:
Spring, Java, Kotlin, REST API, AI, NoSQL, MongoDB, Elasticsearch, Neo4j, BigQuery,
Python Additionally:
Private healthcare, Motivizer, In-house trainings.