Biztalk Developer

We are looking for an experienced .NET Integration Developer with strong expertise in C#, ASP.NET Core, APIs, microservices, and enterprise system integration. The ideal candidate will have hands-on experience building production-grade integration solutions, event-driven architectures, and secure, scalable services using modern .NET technologies.

Key Responsibilities

• Build & Own APIs: Design, develop, and maintain production-grade RESTful APIs and gRPC services using ASP.NET Core, taking ownership from technical specification through deployment and production support.
• Enterprise System Integration: Integrate ERP, CRM, legacy, and third-party platforms using modern middleware and integration patterns, ensuring reliable and low-latency data exchange.
• Event-Driven Architecture: Design and implement asynchronous, loosely coupled integrations using message brokers such as Azure Service Bus, RabbitMQ, and Kafka.
• Data Transformation: Develop high-performance transformation and mapping logic using C# and LINQ, handling JSON, XML, CSV/flat files, and Protocol Buffers (Protobuf) across integration and ETL workflows.
• Data Access: Design clean and scalable data-access layers using Entity Framework Core, working with databases such as SQL Server and PostgreSQL.
• API & Integration Security: Implement OAuth 2.0, OpenID Connect (OIDC), API Gateway policies, authentication/authorization, and end-to-end encryption across integration services.
• CI/CD & Deployment: Build and maintain automated CI/CD pipelines using Azure DevOps or GitHub Actions to enable reliable and repeatable deployments.
• Architecture & Engineering: Apply Microservices, SOA, and Event-Driven Architecture principles to build scalable, maintainable, and resilient integration solutions.
• Quality & Performance: Troubleshoot integration issues, optimize API and service performance, and ensure solutions meet production standards for reliability, security, and scalability.

Must-Have Skills

• Expert-level programming skills in C#
• Strong hands-on production experience with .NET 6 / .NET 8+ and ASP.NET Core
• Strong understanding of Microservices, SOA, and Event-Driven Architecture
• Proven experience in building and consuming REST APIs, SOAP services, Webhooks, and gRPC services
• Hands-on experience with messaging technologies such as Azure Service Bus, RabbitMQ, or Kafka
• Strong knowledge of Entity Framework Core
• Experience working with SQL Server and/or PostgreSQL
• Strong understanding of JSON, XML, CSV/flat files, Protocol Buffers (Protobuf), and data transformation
• Experience implementing OAuth 2.0, OpenID Connect, API security, and API Gateway policies
• Hands-on experience with Azure DevOps and/or GitHub Actions for CI/CD
• Strong understanding of enterprise integration patterns, asynchronous processing, error handling, logging, and monitoring

Experience and Required Skill Sets: 

1      Solid experience in software design and development using Microsoft ASP.NET framework, C#, Visual Studio, and in writing clean, readable, and easily maintainable code

2      5+ years of experience in WCF, WPF, VB.NET, SQL Server, JQuery, Angular 10 and above.

3      5+ years of experience in developing highly scalable REST/Web APIs

4      5+ years of experience in developing highly efficient SQL/NoSQL Queries

5      5+ years of experience in Relational and Document databases

6      Strong understanding of object-oriented programming and possess strong fundamental design principles for building a scalable application.

7      Experience in using the MVC framework, working knowledge in APIs, and Service Oriented Architecture

8      Strong understanding of object-oriented programming and possess strong fundamental design principles for building a scalable application.

9      Experience in Angular version 10 and above is required 

10   Expert in SQL programming & Database Design (Stored procedure, Function, Trigger, Constraints, Replication) 

11   Strong ability in HTML and JavaScript (AJAX, DOM)

12   Development experience with data integration technologies including REST, SOAP, JSON, XML

13   Expertise in programming and usage of any unit testing framework. Expertise in integration testing and continuous integration.

14   Experience working in a DevOps environment will be an added advantage.

Responsibilities: 

•       Ability to create complex, enterprise-transforming applications that meet and exceed client expectations. 

•       Responsible for the bottom line. Strong project management abilities. Ability to encourage the team to stick to timelines.

•       Follow best-in-class coding practices and review the solutions vis-à-vis the requirements and technical specifications.

•       Should demonstrate strong client interfacing capabilities like emails and calls with clients in the US/UK

What you'll do

Own a client end to end. Learn their business, find what to automate or rebuild, and lead the work that ships it.

Turn business problems into technical solutions sit in the call, understand the real problem, design the fix, and decide how it gets built.

Stay hands-on. You'll still write code, build integrations, and work with APIs every day.

Build on whatever the client runs Zoho, Salesforce, Azure, similar platforms, and custom apps where needed.

Run delivery: scope it, sequence it, ship it, support it. The timeline is yours.

Review code and designs. Mentor the developers on your projects and unblock them fast.

Be the escalation point when something breaks or an integration misbehaves.

Own client communication on the technical side status, tradeoffs, bad news, early.

Keep the bar high: clear docs, clear updates, clear commit history.

What we're looking for

4–7 years shipping software, with real depth in REST APIs and system integrations.

Experience leading projects or small teams — the person others check with before they build.

Strong with business platforms (Zoho, Salesforce, or similar). Much of the leverage lives there, not in custom code.

You can sit with a non-technical client, understand the problem, and come back with a working solution.

Still enjoy building. This is technical leadership, not coordination.

Self-driven. You'll often be the senior-most engineer on the account.

Why you'll love this role

Full ownership from first call to delivery — you run projects, not a ticket queue.

Direct access to clients and leadership. Your decisions ship the same week.

Constant variety: new systems, new problems, new builds.

A step into technical leadership without giving up the hands-on work.

We are looking for an integration engineer to assist our rapidly growing customer base. As part of our integration team, you will be the primary point of contact for all integrations. You would be responsible for helping our clients integrate with OneFin APIs, configuring our system for clients, and providing ongoing help to them to resolve any issues.

Application form: https://forms.gle/KbbeXxqhwpwnCzcDA

Responsibilities

• Understand and explain APIs to clients. Help clients integrate OneFin APIs. Research and identify solutions to issues during integration.
• Escalate unresolved issues to appropriate internal teams (e.g., software developers).
• Become a product expert for clients.
• Configure the OneFin system for customized usage by clients. Identify and write internal and external technical articles or knowledge-base entries, like typical troubleshooting steps, workarounds, or best practices, how-to guides, etc.
• Automate the solution of common issues using Python.
• Help live clients resolve issues and coordinate with the development team for issue resolution.

Requirements and Qualifications:

• BS/B.Tech. in Computer Science, Engineering, or an equivalent.
• Strong verbal and written communication skills.
• Experience in writing code in Python.
• Understanding web-based systems.
• Proficient in understanding and writing JSON.
• Experience in SQL databases.
• Experience working with REST APIs.
• Excellent analytical skills, passion for pinning down technical issues, and solving problems.
• Enjoys a fast-paced startup environment.

Location: Bangalore (Hybrid)

Experience: 4–8 Years

About the Role

At Twenty20 Systems, we are looking for a Senior Software Engineer (Integration) who can build and support scalable integrations across enterprise applications, APIs, and data systems.

This role is ideal for someone who is hands-on, technically strong, and excited to solve real integration challenges in a fast-paced environment. You will work closely with engineering, product, and delivery teams to build reliable integration solutions while contributing to architecture and engineering best practices.

What You’ll Do

• Design, develop, and maintain enterprise integrations, APIs, and automation workflows across internal and third-party systems.
• Build and manage integrations using Workato and other iPaaS/middleware platforms.
• Develop and optimize API-based services, data pipelines, and workflow automations for business-critical use cases.
• Work with product, engineering, and business teams to understand requirements and build scalable solutions.
• Troubleshoot, monitor, and improve integration performance in production environments.
• Build reusable components, connectors, and automation logic to improve delivery efficiency.
• Ensure integrations follow security, reliability, performance, and governance standards.
• Support delivery teams in resolving integration issues and improving system performance.

Requirements

• 4–6 years of experience in software engineering, middleware, or enterprise integrations.
• Strong hands-on experience in Workato (Boomi, MuleSoft, WSO2, TIBCO experience is a plus).
• Good understanding of REST/SOAP APIs, webhooks, OAuth, and connector-based integrations.
• Strong skills in JSON, XML, SQL, JavaScript/Python, and data transformation logic.
• Experience working with enterprise applications like Salesforce, NetSuite, Workday, Snowflake, Shopify, etc.
• Exposure to cloud platforms (AWS/Azure/GCP) and automation architectures is a plus.
• Good debugging, troubleshooting, and problem-solving skills.
• Ability to work in a fast-paced delivery-oriented environment with strong ownership.

What Your First 3 Months Will Look Like

• Take ownership of assigned integration projects and support ongoing delivery pipelines.
• Work on API integrations, automations, and troubleshooting real-time production scenarios.
• Collaborate with senior engineers and product teams to improve integration quality and performance.

Where You’ll Be in 6 Months

• Independently handling multiple integration workflows and delivery requirements.
• Contributing to reusable frameworks and engineering best practices.
• Becoming a key technical contributor for integration design and production support.
• Driving faster delivery through automation and optimized integration patterns.