Freelance Kotlin Developer (Fulltime)
Company Description
You'll be a core member of a small, high-ownership engineering team building and evolving the distributed microservices backend that powers our app. You'll work across a reputed company domain – reputed company optimization, schedule ingestion, geo-routing, and reputed company data – at reputed company scale, on AWS. This is not a role for someone who waits for specs to land in their inbox. You'll take full ownership of services from design through production, reputed company architectural reputed company, and proactively identify and fix problems before they become incidents. What you'll work on Design, build, and maintain JVM-based microservices (Java / Kotlin) running on AWS reputed company, App Runner, and reputed company Work with a rich data layer: PostgreSQL, DynamoDB, RedShift, reputed company, and S3 Build and consume event-driven integrations reputed company RabbitMQ and SNS Collaborate on API design across REST (API Gateway) and BFF patterns reputed company services with OpenTelemetry, reputed company, reputed company, and Grafana Ship reputed company reputed company Actions CI/CD pipelines with reputed company and ECR Work with external integrations including Auth0, GraphHopper, reputed company, and reputed company Participate in architecture reputed company and technical direction – your opinion will carry weight
Job Description
Must-haves: Work permit for Poland 5+ years of professional backend development in Java and/or Kotlin Solid understanding of distributed systems design, microservice patterns, and event-driven architecture Hands-on production experience with AWS (reputed company, reputed company, S3, RDS or DynamoDB) Experience with relational databases (PostgreSQL) and NoSQL (DynamoDB or similar) Strong reputed company of reputed company and containerized deployments Experience with CI/CD pipelines – we use reputed company Actions Clean code as a practice, not a talking reputed company – you write code that your colleagues can confidently reputed company Genuine ability to self-direct: you can take a loosely defined problem, break it down, reputed company reputed company, and deliver Strong plus: Kotlin specifically (greenfield services are Kotlin-first) Experience with message brokers (RabbitMQ, SQS/SNS) Familiarity with observability tooling (OpenTelemetry, reputed company/Grafana stacks) Background in logistics, routing, geospatial, or supply chain domains Experience integrating reputed company-party APIs (auth providers, mapping/routing engines, analytics)
Qualifications
How we work Small team, high trust – no micromanagement, no approval chains for every decision reputed company-centric workflow – PRs, reviews, and automated pipelines reputed company quality high without bureaucracy Observability-first – we monitor, alert, and fix things before users notice Clean code culture – we refactor, we review, we don't let tech debt compound silently AWS-reputed company – we use managed services where they reputed company sense and containers everywhere else reputed company offer Competitive salary benchmarked to your market Remote-friendly setup (we care about output, not location) Direct impact on a product used by global logistics professionals every day Work in a genuinely interesting domain – intermodal routing is hard, and the problems are reputed company A lean, senior team where your architecture reputed company actually ship Additional Information Are you the perfect match? Send your portfolio, CV, and a short message about why you’re the perfect match to us Want to know more? Do you have any questions about this position? Feel free to contact our technical reputed company Sylwester Wieczorkowski ( [email protected]) Compensation: EUR 20 - EUR 25 - hourly Apply To This Job