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Gentian D.

Senior Software Engineer | Python | Node.js | AWS
  • Suggested rate
    €275 / day
  • Experience8-15 years
  • Response time1 hour
The project will begin once you accept Gentian's quote.
Location and workplace preferences
Location
Berlin, Germany
Remote only
Primarily works remotely
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Skill set
Check out Gentian's expertise
Industry fields of expertise
Banking and Financial Services
Digital and IT Services
E-commerce
Software Publishing
Gentian in a few words
Experienced Senior Software Engineer specialized in building robust stream and batch processing ETL data pipelines for data extraction, reporting, BI solutions, and near real-time analytics. Proven track record of maintaining high-performance systems and driving efficiency. Bachelor's degree in Computer Science from the University of Prishtina "Hasan Prishtina".
Experience
  • Klarna
    Senior Software Engineer - Card & Banking
    April 2022 - Today (2 years and 10 months)
    Berlin, Germany
    Klarna is a fintech company that provides a range of services primarily focused on simplifying the shopping and payment experience making it as smoooth and convenient as possible for both consumers and merchants.
    - Led the architectural design and implementation of a high-performance risk and fraud banking decisioning engine, handling tens of thousands of requests per second with an SLA/SLO adherence under 300/100 ms.
    - Designed and implemented an ETL data pipeline for banking deposits data, supporting regulatory reporting with 30M+ records spanning over the past 10 years.
    - Optimized Lakehouse architecture integration, transitioning from a queue based to a file-based approach, reducing data processing time from 24-48 hours to 1-2 hours, significantly improving overall efficiency, data quality, and reconciliation processes. Tech Stack:
    - Languages: TypeScript, Python, Java, SQL
    - Frameworks: AWS CDK, Node.js, NestJS, FastAPI
    - Cloud (AWS): Lambda, DynamoDB, S3, Glue, Athena, EventBridge, SNS, SQS, EC2, IAM, Redshift, RDS, Aurora, CloudFormation, Managed Flink Service, CloudWatch
    - Monitoring: Datadog, Splunk, Sentry, Prometheus
    - Tools: Docker, Kafka, Airflow, Jenkins, Bash, Git
  • Mobivate
    Senior Back-End Developer
    November 2021 - March 2022 (4 months)
    London, UK

    - Migrated legacy Python project from v2 to v3, transforming into a modern distributed system utilizing asynchronous architecture; resulting in a 50% reduction in server response time.
    - Led initiatives to refine data quality measures, resulting in 99.9% data accuracy rates; implemented rigorous validation checks that enhanced the reliability of business intelligence outputs.
    - Revamped back-end systems and APIs, adding monitoring, observability tools, introducing real-time performance tracking, reducing system downtime by 15% and increasing operational reliability. Tech Stack:
    - Languages: Python, JavaScript, SQL
    - Frameworks: FastAPI, Flask, Django
    - Databases: MySQL, MongoDB
    - Tools: Docker, Portainer, Redis, RabbitMQ, Kafka, Celery, SQLAlchemy, Bash, Git
  • StarLabs
    (Senior) Back-End Developer
    September 2020 - November 2021 (1 year and 2 months)
    Pristina District, Kosovo

    - Migrated a Django monolithic application into asynchronous FastAPI microservices, resulting in a 20% improvement in API response time.
    - Achieved 98% test coverage across seven different microservices by implementing automated testing frameworks and integration tests.
    - Supported system integration of diverse data sources and technologies used in the design, construction, testing, deployment, and operations of BI solutions.
    - Developed comprehensive platform for data extraction, visualization and analysis.
    - Worked together with UI/UX designers and product owners to conceptualize and build new features end-to-end. Tech Stack:
    - Languages: Python, SQL, PL/pgSQL
    - Frameworks: Django, FastAPI
    - Databases: PostgreSQL, MySQL
    - Tools: Airflow, Puppeteer/Pyppeteer, Docker, Kubernetes, Celery, SQLAlchemy, S3, dbt, Ansible, Bash, Git, Linux
    • Check out Gentian's experience
Recommendations
Education
  • Bachelor of Science in Computer Science
    University of Prishtina "Hasan Prishtina"
    2018
    The curriculum covered a comprehensive range of topics: Fundamentals of Programming, Algorithms and Data Structures, Computer Architecture, Operating Systems, Software Engineering, Web Programming, Computer Networks, Data Security, Distributed Systems, Data Mining, Internet Security, and Cloud Computing among others