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Senior Backend Engineer
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Offer summary

(Summary generated by AI based on the full job description)

The project focuses on a global fitness and wellness platform with a core in high-performance backend systems. The tech stack includes Kotlin, Kafka, AWS, Docker, Kubernetes, PostgreSQL, and NoSQL. Responsibilities cover designing scalable microservices, event-driven architecture, team mentoring, performance optimization, reliability assurance, and collaboration with product and QA teams. Offered salary reaches up to 30,000 PLN gross with medical care, Multisport, and MacBook Pro included.

newyou can start ASAP

Senior Backend Engineer

Company: Motife Sp. z o.o.

from: 9 July 2026
to: 8 August 2026
21 000 - 30 000 złgross/ mth.contract of employment (full-time)
Salary details

Mid: 21 000 PLN - 23 000 PLN gross on the Contract of Employment

Senior: 23 000 PLN - 30 000 PLN gross on the Contract of Employment

basic salary
Offer parameters
level:mid • senior
working mode:hybrid
Warszawa, Wola
Warszawa, WolaGrzybowska 60View on map

Requirements

Expected technologies

Kotlin
PostgreSQL
MySQL
DynamoDB
MongoDB
Kafka
JVM
Spring Boot

Optional technologies

GitHub Actions
Jenkins

Operating system

macOS

Our requirements

  • 6+ years of experience building high-performance, scalable backend systems as Senior/4+ years of experience as a Mid Engineer
  • Strong proficiency in Kotlin, Python, or similar backend languages
  • Experience with modern backend frameworks (e.g., Spring Boot or Python-based frameworks)
  • Strong experience with both relational (PostgreSQL, MySQL) and NoSQL databases (DynamoDB, MongoDB)
  • Hands-on experience with microservices and event-driven architectures
  • Experience with distributed streaming platforms such as Kafka
  • Solid understanding of API design (REST, gRPC, or GraphQL)
  • Hands-on experience with AWS services (e.g., S3, DynamoDB, Lambda, SQS, IAM)
  • Experience with Docker and Kubernetes
  • Familiarity with infrastructure and deployment tooling (e.g., Terraform, GitHub Actions, Jenkins)
  • Experience with caching systems such as Redis or Memcached
  • Strong understanding of CI/CD, DevOps, and Agile methodologies
  • Experience with observability and monitoring tools (e.g., Datadog, Sentry)
  • Proven experience in production support and incident management in distributed systems

Your responsibilities

  • Design and build high-performance, scalable backend services and APIs supporting global content delivery
  • Architect event-driven systems and microservices handling large-scale traffic and real-time interactions
  • Drive system design decisions with a focus on reliability, performance, and security
  • Lead technical discussions, architecture reviews, and design decisions across teams
  • Define and promote reusable patterns, components, and engineering standards
  • Mentor engineers through code reviews, pair programming, and technical guidance
  • Identify system bottlenecks using monitoring, tracing, and load testing tools
  • Optimize performance through data modeling, caching strategies, and query improvements
  • Champion best practices including CI/CD, automated testing, observability, and infrastructure as code
  • Maintain high standards for code quality, scalability, and maintainability
  • Continuously improve development processes and system architecture
  • Partner closely with Product, Design, and QA to deliver impactful features
  • Translate business requirements into scalable technical solutions
  • Act as a domain expert within the team and contribute to platform-wide initiatives

About the project

We are hiring on behalf of our client, a global innovator in fitness and wellness technology. Their mission is to empower people to live fit, strong, long, and happy lives by delivering integrated experiences to millions of members anytime, anywhere.
We are looking for a Senior and Mid Software Engineers to join the Content Cloud team. In this role, you will design and build high-performance backend systems that power content delivery across a global platform. You will act as a technical leader within the team, driving architectural decisions, mentoring engineers, and ensuring the reliability and scalability of systems used by millions of users. This is a hands-on role with strong ownership and impact on distributed, event-driven systems at scale.
Stack: Kotlin (main codebase)
We're open to: Java/Go/TypeScript/JavaScript,
Other tools: REST/gRPC/GraphQL, Kafka, Redis, PostgreSQL/MySQL, DynamoDB/MongoDB, AWS, Docker, Kubernetes

This is how we organize our work

This is how we work

in houseyou develop several projects simultaneouslyyou have influence on the technological solutions appliedyou have influence on the productyou focus on product developmentyou focus on code maintenanceagile

Team members

backend developerfrontend developerfullstack developermobile developerdevOpsautomated test programmer

This is how we work on a project

  • TDD
  • Continuous Deployment
  • Continuous Integration
  • DevOps
  • test automation
If this sounds like your next step, we’d love to hear from you! Please apply via our careers page and submit your CV in English.
Company

What we offer

  • 100% paid medical care
  • Multisport
  • Creative tax (KUP)
  • Home office allowance
  • MacBook Pro

Recruitment stages

  • 1.
    A call with MOTIFE Recruiter
  • 2.
    Coding interview (1h)
  • 3.
    Panel interviews with the team (2.5h)
Senior Backend Engineer
21k–30k zł / mth. (CoE)
I apply to:
Motife Sp. z o.o.
Warszawa, Wola
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