10/08/2026 updated
100 % available
Software Backend Engineer | Python | Django | FastAPI | Microservices
Sofia, Bulgaria
Only remote
SoftUni - Software Engineering with Python, Certified with distinction (2020-2021)About me
Python Backend Engineer with 6 years of experience in Django, FastAPI, PostgreSQL, APIs, and automation. Background in fintech, data processing, and SaaS platforms. Focused on building reliable, scalable systems. Available for remote B2B contracts.
Application Programming Interfaces (APIs)DevOpsDjangoPython (Programming Language)PostgreSQLMessaging Application Programming InterfaceFlaskBackendFastAPIpandasBackend ProgrammingCeleryFront End Software DevelopmentApi DesignWebhooks
Python Backend Development
Over 5 years of hands-on experience building production web platforms using Python, Django, Django REST Framework, and FastAPI. Expertise in designing RESTful APIs, microservices architectures, and webhooks for scalable and maintainable backend systems.
Data Processing & Pipelines
Strong background in designing and implementing data-processing pipelines using Pandas and Polars. Experience building data ingestion, reconciliation, and reporting workflows aligned with analytical and operational requirements, including performance optimization with vectorized operations.
Database & Search Technologies
Proficient in PostgreSQL, Elasticsearch, and Redis for data storage, advanced search functionality, and caching. Experience with scalable query construction, filtering, and object storage integration in production environments.
Async & Task Queue Integration
Practical experience with Celery, Celery Beat, RabbitMQ, and cron for asynchronous and scheduled processing. Integration of third-party services such as Mailchimp, Chargebee, OAuth, and Google APIs into backend workflows.
DevOps & CI/CD
Familiarity with Docker, Docker Compose, Kubernetes, Linux, Git, CI/CD pipelines, Argo CD, and nginx. Experience maintaining quality gates with pytest and applying test-driven development practices.
Cloud & Authentication
Experience with Azure AD B2C for authentication and authorization, as well as AWS S3 and GCS exposure for cloud object storage. Implementation of secure authentication flows and external customer data mapping.
Frontend & Additional Tools
Working knowledge of Dash, jQuery, Bootstrap, Scrapy, and Select2 for supporting frontend components and automated data collection tasks within backend-driven projects.
Agile & Stakeholder Collaboration
Experience working in Agile Scrum environments with a focus on API design, performance optimization, production support, and direct collaboration with stakeholders to translate business requirements into technical solutions.
Over 5 years of hands-on experience building production web platforms using Python, Django, Django REST Framework, and FastAPI. Expertise in designing RESTful APIs, microservices architectures, and webhooks for scalable and maintainable backend systems.
Data Processing & Pipelines
Strong background in designing and implementing data-processing pipelines using Pandas and Polars. Experience building data ingestion, reconciliation, and reporting workflows aligned with analytical and operational requirements, including performance optimization with vectorized operations.
Database & Search Technologies
Proficient in PostgreSQL, Elasticsearch, and Redis for data storage, advanced search functionality, and caching. Experience with scalable query construction, filtering, and object storage integration in production environments.
Async & Task Queue Integration
Practical experience with Celery, Celery Beat, RabbitMQ, and cron for asynchronous and scheduled processing. Integration of third-party services such as Mailchimp, Chargebee, OAuth, and Google APIs into backend workflows.
DevOps & CI/CD
Familiarity with Docker, Docker Compose, Kubernetes, Linux, Git, CI/CD pipelines, Argo CD, and nginx. Experience maintaining quality gates with pytest and applying test-driven development practices.
Cloud & Authentication
Experience with Azure AD B2C for authentication and authorization, as well as AWS S3 and GCS exposure for cloud object storage. Implementation of secure authentication flows and external customer data mapping.
Frontend & Additional Tools
Working knowledge of Dash, jQuery, Bootstrap, Scrapy, and Select2 for supporting frontend components and automated data collection tasks within backend-driven projects.
Agile & Stakeholder Collaboration
Experience working in Agile Scrum environments with a focus on API design, performance optimization, production support, and direct collaboration with stakeholders to translate business requirements into technical solutions.
Experience
Professional experience0 - 5 years
Freelancer since2025
Languages
BulgarianNative speakerEnglishFluent
Project history
Developing backend automation systems supporting monitoring, validation, and reporting workflows in a quantitative trading environment. Designing Python-based processes to reduce repetitive manual work and improve reliability of operational reporting. Building and maintaining data-processing and delivery workflows aligned with analytical and operational requirements. Collaborating directly with stakeholders to translate reporting needs into maintainable backend solutions. Technologies: Python, Backend Automation, Data Processing, Monitoring, Reporting.
Designed data pipelines for caching and efficiently accessing Pandas and Polars DataFrames from cloud storage and backend services. Built Python microservices for cash-flow calculation and reconciliation using Polars for high-performance data manipulation. Developed and maintained a Django platform for cash-flow and positions reconciliation including manual journal entries and integration with internal calculation engines. Implemented FastAPI endpoints for real-time queries and communication between microservices and analytical dashboards. Created scheduled ingestion, reconciliation, and reporting jobs, and developed Dash dashboards for pipeline health and reconciliation monitoring. Refactored computation modules with vectorized Polars operations to improve execution performance on large datasets. Technologies: Python, Django, FastAPI, Polars, Pandas, Dash, PostgreSQL, Cron, Cloud Object Storage.
Helped build a media intelligence platform from the ground up using Django and Django REST Framework. Developed scalable APIs and Elasticsearch-backed search functionality including advanced query construction and filtering. Built backend components for metrics calculation and daily client-consumption tracking used by the platform's reporting and billing workflows. Integrated Azure AD B2C authentication and mapped external customer data to internal client accounts. Implemented asynchronous and scheduled processing with Celery and Celery Beat, and integrated Mailchimp for automated email campaigns. Maintained automated tests with pytest and contributed to CI quality gates for reliable production delivery. Technologies: Python, Django, DRF, PostgreSQL, Elasticsearch, Celery, Celery Beat, Azure AD B2C, Chargebee, Mailchimp, pytest.