Senior Python Backend Developer

Wissen Technology is hiring for Senior Python Backend Developer

About Wissen Technology:

Job Summary:

Own the core processing engine and the services around it, the code that turns a day of financial events into millions of journal lines inside a fixed batch window. The most performance and correctness critical seat on the team.

• Experience: 5 - 10 Years 
  
• Location: Bangalore
  
• Mode of Work: Hybrid 
  
• Education Qualification: MCA/B.E/B.Tech/MTech
  

Key Responsibilities & Duties:

• Own the processing engine: set-based SQL inside Python services, concurrent processing, dynamic work partitioning, dimension keys, ledger fan-out
  
• Own batch orchestration end to end: data-quality gate, currency translation, revaluation, snapshots, period close, every stage idempotent and resumable
  
• Own performance and concurrency: transaction boundaries, chunk sizing, deadlock handling with backoff, connection usage
  
• Design services, inter-service contracts, retry semantics and API versioning
  
• Design and implement REST APIs for processing, configuration and reporting
  
• Build accounting capability: manual journals, unposting, approval workflow, maker/checker rule lifecycle, suspense, year-end roll, GL export
  
• Integrate message queues with duplicate controls, dead-lettering and replay
  
• Write tests for data-intensive logic; mentor junior backend developers
  

Skills Preferred:

• 5-10 years professional Python, including asynchronous programming
  
• Production depth in FastAPI, Django or Flask
  
• Expert SQL and strong PostgreSQL: set-based design, plan awareness, upserts, isolation levels, locking
  
• REST API design at scale and microservice architecture in practice
  
• Demonstrated high-volume batch engineering, has taken a workload from hours to minutes and can explain why it worked
  
• Correctness engineering: idempotency, exactly-once under retry, reconciliation, financial precision
  

Wissen Sites: 

• Website: www.wissen.com 
  
• LinkedIn: https://www.linkedin.com/company/wissen-technology 
  
• Wissen Leadership: Leadership Team | Wissen 
  
• Wissen Live: https://www.linkedin.com/company/wissen-technology/posts/feedView=All
  
• Wissen Thought Leadership: https://www.wissen.com/articles