06/02/2026 updated
100 % available
Senior Fullstack Engineer, Founding Fullstack Engineer, Software Developer
Warszawa, Poland
Only remote
Big DataElastic LogstashReverse EngineeringBackendFull Stack DevelopmentFront End Software DevelopmentTerraformElk Stack
DynamoDB, S3, SQS, AWS, Hadoop, Maven, Spark, Api Gateway, APIs, API, Backend, back-end, Batch processing, Big Data, Cloudwatch, Contentful, Cron, DataLake, data communication, Docker, Elasticsearch, ELK stack, event-driven architecture, expo, Figma, Firebase, front-end, GitLab, Gitlab CI, Guice, Groovy, Heroku, Computer Science, Infrastructure as Code (IaC), Java, Java code, Jest, JUnit, Kibana, Logstash, Nest.js, Node.js, Oracle database, Oracle Service Bus, PostgreSQL, Prometheus, message queues, React Native, Redux, ReactJs, Redis, reverse engineering, serverless, debugging, Spock, Spring, Spring Boot, Stripe, Terraform, Twilio, TypeScript, web application
Experience
Professional experience5 - 10 years
Freelancer since2022
Languages
GermanGoodEnglishFluentPolishNative speaker
Project history
* Building web application and native application for a startup
* Working on both back-end and front-end side
* Used technologies: TypeScript, Node.js , Nest.js, Prisma, Redis, PostgreSQL, ReactJs, expo, React Native, Jest, Prettier,
Chakra-ui, Stripe, RTK Query, i18n, Styled components, Contentful, Figma
* Building and deploying app to Heroku using Docker
* Monitoring app with Sentry and Firebase
* Supporting product & customer success team with building dashboards on Retool
* Working on both back-end and front-end side
* Used technologies: TypeScript, Node.js , Nest.js, Prisma, Redis, PostgreSQL, ReactJs, expo, React Native, Jest, Prettier,
Chakra-ui, Stripe, RTK Query, i18n, Styled components, Contentful, Figma
* Building and deploying app to Heroku using Docker
* Monitoring app with Sentry and Firebase
* Supporting product & customer success team with building dashboards on Retool
* Building startup's MVP
* Implementing new features on both back-end and front-end side
* Developed and integrate APIs to improve data communication between front-end and back-end components
* Deployed serverless application to AWS using Infrastructure as Code (IaC)
* Working with message queues and event-driven architecture
* Conducted testing and debugging of the application to ensure high performance, security, and scalability
* Used technologies: TypeScript, Node.js, ReactJs , Serverless Stack (SST) with AWS (Lambda, SQS, SNS, Cognito, Api
Gateway, DynamoDB, Cron, S3, Cloudwatch, Secrets-manager), Jest, Vite, Redux, MUI, RTK Query, Prettier, zod,
Stripe API, Twilio, Gitlab CI/CD
* Implementing new features on both back-end and front-end side
* Developed and integrate APIs to improve data communication between front-end and back-end components
* Deployed serverless application to AWS using Infrastructure as Code (IaC)
* Working with message queues and event-driven architecture
* Conducted testing and debugging of the application to ensure high performance, security, and scalability
* Used technologies: TypeScript, Node.js, ReactJs , Serverless Stack (SST) with AWS (Lambda, SQS, SNS, Cognito, Api
Gateway, DynamoDB, Cron, S3, Cloudwatch, Secrets-manager), Jest, Vite, Redux, MUI, RTK Query, Prettier, zod,
Stripe API, Twilio, Gitlab CI/CD
* Integrating bank APIs based on PSD2 directive and reverse engineering of existing apps
* Used technologies: Java, Guice, Bazel, Spring Boot, JUnit, WireMock
* Monitoring using ELK stack (Elasticsearch, Logstash, and Kibana), Prometheus, OpsGenie
* Leading new joiners and interns inside team
* Used technologies: Java, Guice, Bazel, Spring Boot, JUnit, WireMock
* Monitoring using ELK stack (Elasticsearch, Logstash, and Kibana), Prometheus, OpsGenie
* Leading new joiners and interns inside team