API Developer

About Zenwork

Zenwork is a market leader in the fintech space whose products help automate IRS tax filing processes by blending Tax expertise with technology tools.

With over a decade of experience, we've empowered over 500,000 businesses and 30,000 CPA firms to navigate compliance complexities seamlessly

Zenwork stands at the forefront of cloud/API-based Tax Automation and Governance, Risk Compliance (GRC) technology, pioneering the future of Tax Tech and GRC Automation. In terms of numbers, during the tax year 2022, we have reported over $413 Billion to the Internal Revenue Service, spanning over 30 million transactions for some of the globe's leading and most forward-thinking firms.

As a rapidly expanding digital compliance AI-SaaS Product company, Zenwork boasts a customer base that spans all sizes, partnering with industry giants like Intuit, Bill.com, Xero, and Sage Intacct. Recognized as one of the fastest-growing companies in the U.S. by Inc magazine and a consecutive Accountex award recipient, Zenwork has garnered significant acclaim.

The executive team at Zenwork is led by Sanjeev Singh, CEO (Ex ADP, Harvard) along with Co-Founders Ed Pratt (Ex ADP) and Rekha Singh (Ex IBM)

Backed by Spectrum Equity Partners, Zenwork has successfully raised over $163M in funding, maintaining profitability as a late-stage entity with operations in both the U.S. and India.

Job Title: API Developer

Experience : 3+

Work Mode-WFO (night shift)

About the Role

We are seeking a highly skilled API Developer with 45 years of experience in building, maintaining, and optimizing high-performance APIs. This role is ideal for someone who thrives in solving technical challenges independently during night hours.

The role consists of:

1.Primary Responsibility: Handling, analyzing, and resolving API-related technical support tickets.

2.Secondary Responsibility: Contributing to backend/API development projects.

Key Responsibilities

Troubleshoot and resolve API technical queries , ensuring timely and accurate support during night shift.

Design, develop, and optimize high-performance APIs using .NET 8.

Diagnose and mitigate race conditions, deadlocks, and concurrency issues .

Implement API authentication and authorization (OAuth2, JWT, OpenID Connect).

Optimize API performance through caching, load balancing, and asynchronous processing.

Maintain documentation using Swagger / OpenAPI specifications.

Implement techniques to enhance API throughput, latency, caching , and overall system performance.

Work with AWS infrastructure to deploy, monitor, and optimize backend services.

Develop and maintain data access layers using Entity Framework Core and integrate with Identity Providers (IDP) .

Create and maintain efficient SQL Server stored procedures, queries, and indexing strategies.

Familiar with SQL and NoSQL databases (PostgreSQL, SQL Server, Redis).

Experience on the Docker services along with Kubernities

Knowledge on the messaging queues like Kafka

Use and configure MCP Server for API integration and related functionalities.

(Optional) Contribute to UI development using React.js where necessary.

Utilize AI tools for code generation, optimization, testing assistance, and productivity improvements.

Maintain technical documentation, follow best practices, and collaborate with cross-functional teams when required.

Required Technical Skills

Strong hands-on experience with .NET 8 and RESTful API design .

Advanced understanding of asynchronous programming , multi-threading , race conditions , and concurrency control .

Proven experience building scalable, secure, and high-performance APIs .

Proficiency with AWS services (e.g., API Gateway, Lambda, EC2, ECS, S3, CloudWatch).

Strong SQL Server skills query tuning, indexing, triggers, stored procedures.

Experience with Entity Framework Core and IDP integrations (OAuth2, OpenID Connect, etc.).

Working knowledge of MCP Server for API handling and configurations.

Familiarity with React.js (optional bonus).

Ability to effectively use AI-assisted development tools (e.g., code copilots, code analyzers, automation tools).

Added Advantage: Strong foundational or advanced knowledge of AI technologies , including model integration, prompt engineering, or AI-driven automation.

Soft Skills & Attributes

Excellent analytical, diagnostic, and debugging skills.

Strong communication and documentation abilities.

Comfortable working independently during night shift .

Attention to detail and a strong sense of ownership.