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Back End Developer
S3tel. Inc.
Dubai, UAE
Full Time
Senior
1 weeks ago
JavaSpring BootPythonREST API DesignPostgreSQLKafka
Free
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JavaSpring BootPython
About the Role
We are looking for a Senior Backend Developer strong in Java and Python to design and maintain scalable backend services. You will build REST APIs, manage databases, and work with event-driven systems.
Key Skills for This Role
JavaSpring BootPythonREST API DesignPostgreSQLKafka
Responsibilities
- Design, develop, and maintain backend services using Java, Spring Boot, and Python
- Build secure, scalable, and well documented REST APIs for web, mobile, admin, operational, and third party integration use cases
- Develop Python based backend services, automation scripts, integration adapters, reporting jobs, internal tools, and data processing workflows
- Design and maintain PostgreSQL database schemas, migrations, indexes, constraints, optimized queries, and data integrity rules
- Implement reliable service layer logic, validation, error handling, pagination, filtering, idempotency, transaction management, and background processing
- Work with event driven patterns using Kafka, message queues, or similar platforms
- Use Redis or equivalent caching/session layers to improve performance
- Integrate with external systems such as payment gateways, notification providers, reporting tools, CRM/ERP systems, cloud services
- Implement authentication, authorization, RBAC, audit logging, input validation, secure API patterns
- Write clean, maintainable, testable code and participate in code reviews
- Create and maintain unit tests, integration tests, API tests, technical documentation
- Support production deployments, monitoring, logging, troubleshooting, incident investigation, performance optimization
Requirements
- 4 to 6 years of backend development experience, with strong hands on experience in Java/Spring Boot and practical experience with Python backend development
- Strong practical Python experience, preferably with FastAPI, Django, Flask, or similar backend/API frameworks
- Strong understanding of REST API design, API versioning, authentication, authorization, error contracts, pagination, documentation, and OpenAPI/Swagger
- Strong PostgreSQL experience, including schema design, joins, indexes, transactions, query optimization, migrations, constraints, and data integrity practices
- Practical experience with Kafka, message queues, or event driven systems
- Good understanding of distributed systems concepts
- Experience with Redis or similar caching/session technologies
- Experience with Docker, CI/CD pipelines, environment configuration, secrets management, and cloud ready application deployment
- Good understanding of security best practices, including JWT/OAuth2 concepts, RBAC, OWASP API risks, audit trails, and secure handling of sensitive data
- Strong debugging and troubleshooting skills
- Ability to write clean code, structure services properly, document decisions, review code, and communicate technical trade offs clearly
Full Job Posting
Position Summary
- We are looking for a Senior Backend Developer who is strong in both Java and Python to design, build, and maintain scalable backend services.
- The ideal candidate should have hands on experience with Java/Spring Boot for production backend systems, and practical Python experience for APIs, services, automation, integrations, data workflows, and backend tooling.
- This role is suited for a hands on engineer who can take ownership of APIs, database design, service architecture, integrations, performance, security, testing, documentation, and production support.
Key Responsibilities
- Design, develop, and maintain backend services using Java, Spring Boot, and Python.
- Build secure, scalable, and well documented REST APIs for web, mobile, admin, operational, and third party integration use cases.
- Develop Python based backend services, automation scripts, integration adapters, reporting jobs, internal tools, and data processing workflows where required.
- Design and maintain PostgreSQL database schemas, migrations, indexes, constraints, optimized queries, and data integrity rules.
- Implement reliable service layer logic, validation, error handling, pagination, filtering, idempotency, transaction management, and background processing.
- Work with event driven patterns using Kafka, message queues, or similar platforms for asynchronous workflows, notifications, telemetry, analytics, and integration events.
- Use Redis or equivalent caching/session layers to improve performance, reduce database load, and support fast backend workflows.
- Integrate with external systems such as payment gateways, notification providers, reporting tools, CRM/ERP systems, cloud services, and other third party platforms as required.
- Implement authentication, authorization, RBAC, audit logging, input validation, secure API patterns, and safe handling of sensitive data.
- Write clean, maintainable, testable code and participate in code reviews across Java and Python codebases.
- Create and maintain unit tests, integration tests, API tests, technical documentation, and developer handover notes.
- Support production deployments, monitoring, logging, troubleshooting, incident investigation, performance optimization, and operational reliability.
Collaboration and Mentoring
- Collaborate with frontend, mobile, DevOps, QA, product, and business teams to translate requirements into reliable backend solutions.
- Mentor junior developers where required and help improve backend engineering standards across the team.
Required Skills and Experience
- 4 to 6 years of backend development experience, with strong hands on experience in Java/Spring Boot and practical experience with Python backend development, automation, integrations, scripting, or data workflows.
- Strong practical Python experience, preferably with FastAPI, Django, Flask, or similar backend/API frameworks.
- Strong understanding of REST API design, API versioning, authentication, authorization, error contracts, pagination, documentation, and OpenAPI/Swagger or similar tools.
- Strong PostgreSQL experience, including schema design, joins, indexes, transactions, query optimization, migrations, constraints, and data integrity practices.
- Practical experience with Kafka, message queues, or event driven systems, including producers, consumers, retries, duplicate handling, idempotency, and failure recovery.
- Good understanding of distributed systems concepts such as eventual consistency, retries, background processing, service boundaries, and failure safe workflows.
- Experience with Redis or similar caching/session technologies.
- Experience with Docker, CI/CD pipelines, environment configuration, secrets management, and cloud ready application deployment.
- Good understanding of security best practices, including JWT/OAuth2 concepts, RBAC, OWASP API risks, audit trails, and secure handling of sensitive data.
- Strong debugging and troubleshooting skills across application logs, APIs, databases, queues, background workers, and production environments.
- Ability to write clean code, structure services properly, document decisions, review code, and communicate technical trade offs clearly.
- Comfortable working in both existing systems and new development, without overengineering or rewriting unnecessarily.
Preferred Skills
- Experience with AWS, Azure, GCP, Kubernetes, ECS/EKS, RDS, managed Kafka, ElastiCache, S3, CloudWatch, or similar cloud services.
- Experience with Python background workers or task queues such as Celery, RQ, Dramatiq, APScheduler, or similar tools.
- Experience with microservices, modular monoliths, domain driven design, service oriented architecture, or backend platform modernization.
- Experience with payment webhooks, order workflows, workflow engines, analytics pipelines, reporting systems, data ingestion, or operational dashboards.
- Experience with observability tools such as Prometheus, Grafana, OpenTelemetry, ELK/OpenSearch, Datadog, New Relic, or similar tools.
- Experience with Flyway, Liquibase, Alembic, Testcontainers, Pytest, Kafka Streams, Debezium, outbox pattern, or CDC patterns.
- Experience integrating AI/ML APIs, OCR, document processing, workflow automation, or internal productivity tools using Python is a plus.
- Ability to mentor developers and support engineering standards across multiple backend technologies.
Candidate Profile
- Hands on backend engineer with strong ownership and accountability.
- Comfortable using Java/Spring Boot for robust production services and Python for fast, reliable backend services, integrations, automations, and tooling.
- Able to think beyond simple CRUD APIs and design systems for reliability, security, scalability, and maintainability.
- Strong problem solver who can debug real production issues and communicate clearly with technical and non technical teams.
- Organized, documentation oriented, and comfortable working in a fast moving product environment.
- Practical and delivery focused: understands when to build, when to refactor, when to stabilize, and when to keep the solution simple.
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