Wissen Technology is hiring for Senior Python Backend Developer
About Wissen Technology:
At Wissen Technology, we deliver niche, custom-built products that solve complex business challenges across industries worldwide. Founded in 2015, our core philosophy is built around a strong product engineering mindset—ensuring every solution is architected and delivered right the first time. Today, Wissen Technology has a global footprint with 2000+ employees across offices in the US, UK, UAE, India, and Australia. Our commitment to excellence translates into delivering 2X impact compared to traditional service providers. How do we achieve this? Through a combination of deep domain knowledge, cutting-edge technology expertise, and a relentless focus on quality. We don’t just meet expectations—we exceed them by ensuring faster time-to-market, reduced rework, and greater alignment with client objectives. We have a proven track record of building mission-critical systems across industries, including financial services, healthcare, retail, manufacturing, and more. Wissen stands apart through its unique delivery models. Our outcome-based projects ensure predictable costs and timelines, while our agile pods provide clients with the flexibility to adapt to their evolving business needs. Wissen leverages its thought leadership and technology prowess to drive superior business outcomes. Our success is powered by top-tier talent. Our mission is clear: to be the partner of choice for building world-class custom products that deliver exceptional impact—the first time, every time.
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
Skills Required
- 5–10 years of professional Python experience, including asynchronous programming
- Production experience with FastAPI, Django, or Flask
- Expert SQL and strong PostgreSQL knowledge, including set-based design, query plans, upserts, isolation levels, and locking
- Experience designing REST APIs at scale and implementing microservice architecture
- Demonstrated high-volume batch engineering experience and ability to optimize workloads from hours to minutes
- Experience with idempotency, retry handling, reconciliation, exactly-once processing, and financial precision
- MCA, B.E., B.Tech, or M.Tech degree
What We Do
The Wissen Group was founded in the year 2000. Wissen Technology, a part of Wissen Group, was established in the year 2015. Wissen Technology is a specialized technology company that delivers high-end consulting for organizations in the Banking & Finance, Telecom, and Healthcare domains. With offices in US, India, UK, Australia, Mexico, and Canada, we offer an array of services including Application Development, Artificial Intelligence & Machine Learning, Big Data & Analytics, Visualization & Business Intelligence, Robotic Process Automation, Cloud, Mobility, Agile & DevOps, Quality Assurance & Test Automation. Leveraging our multi-site operations in the USA and India and availability of world-class infrastructure, we offer a combination of on-site, off-site and offshore service models. Our technical competencies, proactive management approach, proven methodologies, committed support and the ability to quickly react to urgent needs make us a valued partner for any kind of Digital Enablement Services, Managed Services, or Business Services. We believe that the technology and thought leadership that we command in the industry is the direct result of the kind of people we have been able to attract, to form this organization (you are one of them!). Our workforce consists of 1000+ highly skilled professionals, with leadership and senior management executives who have graduated from Ivy League Universities like MIT, Wharton, IITs, IIMs, and BITS and with rich work experience in some of the biggest companies in the world. Wissen Technology has been certified as a Great Place to Work®. The technology and thought leadership that the company commands in the industry is the direct result of the kind of people Wissen has been able to attract. Wissen is committed to providing them the best possible opportunities and careers, which extends to providing the best possible experience and value to our clients
