Senior Backend .NET API Developer

Position Overview

We are seeking a highly experienced Senior Backend .NET API Developerwith strong expertise in financial services platformsto design, build, and optimize secure, scalable backend systems. The ideal candidate will have deep experience in .NET Core / ASP.NET APIs, microservices architecture, and high-volume transactional systems, with a strong understanding of banking/financial domain requirements such as security, compliance, and real-time processing.

This role goes beyond development — the candidate is expected to actively participate in production incident (ITN) calls, take ownership of issue resolution, and drive root cause fixesto ensure system stability, uptime, and customer impact mitigation.

Key Responsibilities

Production Support & Incident Management (Critical Responsibility)

• Actively participate in ITN / production incident bridge callsand provide real-time technical troubleshooting

• Take end-to-end ownership of production issuesimpacting APIs and backend services

• Perform rapid debugging, issue isolation, and hotfix implementationduring incidents

• Drive root cause analysis (RCA)and implement permanent fixes to prevent recurrence

• Collaborate with cross-functional teams (QA, DevOps, Infra) to restore service within SLA timelines

• Monitor logs, metrics, and tracing tools to quickly identify production failures

• Ensure post-incident documentation, learnings, and preventive measuresare implemented

Backend & API Development

• Design, develop, and maintain RESTful APIs and microservicesusing .NET Core / ASP.NET Core

• Build scalable backend services supporting high-volume transactions and financial workflows

• Implement robust business logic for payments, accounts, transactions, and integrations

Architecture & System Design

• Lead backend architecture design focusing on scalability, security, and performance

• Define API contracts, service interfaces, and data models

• Design distributed systems, event-driven or microservices architectures

Financial Domain & Compliance

• Ensure systems comply with financial regulations, security standards, and audit requirements

• Implement secure transaction processing and data protection strategies

• Work with domain teams on risk, reporting, settlement, or payment systems

Database & Data Management

• Design and optimize relational and NoSQL databases(SQL Server, PostgreSQL, MongoDB)

• Ensure data integrity, consistency, and performance tuning

Integration & Collaboration

• Integrate with external systems (e.g., payment gateways, banking APIs, third-party services)

• Collaborate with architects, product teams, QA, and DevOps teams

Code Quality & Leadership

• Conduct code reviews, mentoring, and enforce best practices

• Drive technical design discussions and solution architecture

• Participate in Agile/Scrum processes

Performance & Operations

• Optimize systems for low latency, high availability, and reliability

• Troubleshoot production issues and perform root-cause analysis

Required Qualifications

Experience

• 8–12+ years of experience in backend development

• Strong experience in financial services / banking / fintech domain (mandatory)

• Proven experience building enterprise-grade applications and APIs

Technical Skills

• Strong proficiency in C#, .NET Core / .NET 8+ / ASP.NET Core

• Hands-on experience with REST APIs, Web APIs, and microservices

• Solid knowledge of SQL Server and database design

• Experience with Entity Framework / ORM tools

• Understanding of distributed systems, event-driven architecture

Architecture & Cloud

• Experience with cloud platforms (Azure/AWS/GCP)

• Familiarity with Docker, Kubernetes, CI/CD pipelines

• Knowledge of system design and scalability patterns

Security & Compliance

• Strong understanding of:

  • API security (OAuth2, JWT, OIDC)

  • Data encryption and protection

  • Financial compliance standards (PCI, SOX, etc.)