Senior .NET Fullstack Developer

Job Description:

Technical Lead – Full Stack

Experience: 8–12 years (Strong candidates Java 50% - React 50%)

Location – Bangalore/Hyderabad

Interview Levels – 3 Rounds

Tech Stack: Java, Spring Boot, Microservices, React, SQL

Focus: Hands-on coding, solution design, team leadership, delivery ownership

Must-Have Skills (Depth)

Java (8+): Streams, concurrency, collections, JVM internals (GC), exception handling.

Spring Boot: Security, Actuator, Data/JPA, Feign/RestTemplate, validation, profiles, configuration management.

Microservices: API design, service discovery, resilience patterns (Hystrix/Resilience4j), messaging (Kafka/RabbitMQ) optional.

React: Hooks, component lifecycle, state management, error boundaries, testing (Jest/RTL).

SQL: Joins, aggregations, indexing, query optimization, transaction isolation, schema design.

Testing: JUnit/Mockito for backend; Jest/RTL/Cypress for frontend.

DevOps: Git, CI/CD, containers (Docker), familiarity with deployment environments.

Job Description

Wissen Technology is seeking an experienced C# .NET Developer to build and maintain applications related to streaming market data. This role involves developing message-based C#/.NET applications to process, normalize, and summarize large volumes of market data efficiently. The candidate should have a strong foundation in Microsoft .NET technologies and experience working with message-driven, event-based architecture. Knowledge of capital markets and equity market data is highly desirable.

Responsibilities

• Design, develop, and maintain message-based C#/.NET applications for processing real-time and batch market data feeds.
• Build robust routines to download and process data from AWS S3 buckets on a frequent schedule.
• Implement daily data summarization and data normalization routines.
• Collaborate with business analysts, data providers, and other developers to deliver high-quality, scalable market data solutions.
• Troubleshoot and optimize market data pipelines to ensure low latency and high reliability.
• Contribute to documentation, code reviews, and team knowledge sharing.
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Required Skills and Experience

• 5+ years of professional experience programming in C# and Microsoft .NET framework.
• Strong understanding of message-based and real-time programming architectures.
• Experience working with AWS services, specifically S3, for data retrieval and processing.
• Experience with SQL and Microsoft SQL Server.
• Familiarity with Equity market data, FX, Futures & Options, and capital markets concepts.
• Excellent interpersonal and communication skills.
• Highly motivated, curious, and analytical mindset with the ability to work well both independently and in a team environment.

Job Summary: 

We are looking for a talented Full Stack Developer with experience in C# (ASP.NET Core Web API), React, and SQL Server. The successful candidate will be responsible for designing, developing, and maintaining robust web applications and APIs, ensuring seamless integration between the front-end and back-end systems. 

Key Responsibilities: 

Full Stack Development: Design, develop, and maintain web applications using C#, ASP.NET Core Web API, and React. 

API Development: Create and maintain RESTful APIs to support front-end applications and integrations. 

Database Management: Design, optimize, and manage SQL Server databases, including writing complex queries, stored procedures, and indexing. 

Front-End Development: Implement user interfaces using React, ensuring a smooth and responsive user experience. 

Code Quality: Write clean, scalable, and well-documented code following best practices in software development. 

Collaboration: Work closely with cross-functional teams, including UI/UX designers, back-end developers, and DevOps, to deliver high-quality software solutions. 

Testing & Debugging: Conduct unit testing, integration testing, and debugging to ensure the quality and reliability of applications. 

Continuous Improvement: Stay updated on the latest industry trends and technologies and integrate them into development processes where applicable. 

Required Qualifications: 

Experience: Proven experience as a Full Stack Developer with a strong focus on C#, ASP.NET Core Web API, React, and SQL Server. 

Technical Skills: 

Proficient in C# and ASP.NET Core Web API development. 

Strong experience with React and related front-end technologies (JavaScript, HTML, CSS). 

Expertise in SQL Server, including database design, query optimization, and performance tuning. 

Familiarity with version control systems like Git. 

Understanding of RESTful architecture and Web API design. 

Problem-Solving: Excellent analytical and problem-solving skills with the ability to troubleshoot complex issues. 

Communication: Strong verbal and written communication skills, with the ability to articulate technical concepts to non-technical stakeholders. 

Team Collaboration: Ability to work effectively in a team environment, collaborating with cross-functional teams to achieve project goals. 

Preferred Qualifications: 

Experience with ASP.NET Core MVC or Blazor. 

Knowledge of cloud platforms such as Azure or AWS. 

Experience with Agile/Scrum development methodologies. 

Education: 

Bachelor’s degree in Computer Science, Software Engineering, or a related field (or equivalent experience)

• Proficiency with C# .Net . Experience in ASP.NET MVC, .Net Core, API Development
• Have knowledge around various frameworks in .Net ecosystem (.Net framework , .Net core)
• Actively participate in system design, code reviews, and implementation of new features.
• Take complete ownership of tasks, which includes design , implementation, unit testing and deployment of product and service.
• Hands on experience with Microsoft SQL , writing/ optimising complex queries, writing stored procedures , basic understanding of database performance tuning.
• Develop documentation throughout the software development life cycle. . Good problem solving skills, Excellent debugging and troubleshooting skills.
• Experience working in version controlling tools.

• Good knowledge of ASP.NET, SQL Server, HTML, CSS, JavaScript, and C#/VB.NET.
• Design, code and test new Windows and web software applications
• Enhance existing systems by analyzing business objectives, preparing an action
• Plan and identifying areas for modification and improvement
• Maintain existing software systems by identifying and correcting software defects
• Investigate and develop skills in new technologies
• Create technical specifications and test
• Tech/BS in computer science or a related field.

Responsibilities and Duties 

•      Develop high-quality software design and architecture.

•      Achieve the timeline with quality delivery of assigned tasks.

•      Able to do technical analysis and code review.

•      Able to troubleshoot internal & production bugs.

•      Coordinate and support to project co-ordinator/project manager.

•      Development coding standards are achieved. 

•      Work with internal teams to understand and analyse their needs and to ensure that proposed solution caters to same.

•      Adopt new technology in quick time.

•      Implement Unit tests and Functional tests to ascertain highest quality of deliverables.

•      Identify, prioritize and execute tasks in the software development life cycle.

•      Understand business needs and know how to implement needs in the system to meet business needs.

•      Able to create technical documents.

•      Able to lead team members and plan team’s task.

•      Design, develop, modify, implement, and support software components anywhere in the software stack.

•      Work in close partnership with cross-functional teams and management.

Qualifications

•      Having knowledge of .NET C#, .NET Core, Angular JS, Web API, Micro Services, JavaScript, jQuery and Bootstrap.

•      Critical thinker and creative mindset and the ability to approach a problem creatively.

•      Ability to provide in-depth evaluation and analysis of unique complex technological issues. •      A meticulous approach to work.

•      A team player but can work independently too.

•      Excellent written and verbal communication skills.

•      Multi-tasking and time-management skills, with the ability to prioritize tasks.

•      Database knowledge spanning across SQL, PL/SQL, MSSQL Server, Performance tuning and RDBMS is preferred.

•      Proven track record of successful and timely project delivery.

•      Excellent written and verbal communication skills.

•      Demonstrated ability to lead others. 

• Over +7 years of professional experience in analyzing, designing, developing and deploying client server web applications using .NET Core, C#, ASP.NET MVC and WEB API.

• Responsible for lead, develop and maintain .NET Core web applications and coordinate with other developers to maintain efficient, reusable, and reliable coding standards.

• Experience in writing .NET Core Web API using JWT tokens with a deep understanding of how to streamline data payloads for mobile and low bandwidth devices.

• Worked on .NET design patterns such as MVC including Dependency Injection (DI), and any custom/hybrid framework as designed by the Architects.

• Proficient developing real-time project, modern UI technology experience in Blazor (Web Assembly / Server) using with Dapper and MudBlazor.

• Extensive experience in conceptual data modeling, build out database design and schema, performing SQL query optimization and stored procedures using Microsoft SQL Server.

• Hands on experience in creating, deploying and managing reports using Crystal Reports. Participate in unit test and integration testing. Familiarity with Agile (Scrum) methodologies.

• Ability to code and implement front-end web applications and backend processing systems.
• Research, evaluate, and prototype new methodologies, technologies, Prepare proofs-of-concept.
• Convert business requirements into technical documentation using UML diagrams.
• Accountable for peer review, and quality using various design principles and patterns.
• Responsible for team members learning.
• Enforce to follow Secure Coding guidelines.
• Provide clear communication and set expectations to team members.
• Assist Project Manager in defining and refining project scope and work.
• Foreseeing the project risk and define mitigation plan and keep the manager updated.

Skills Required:

• Multi-tier Web Services / RESTful APIs
• C++, Java, C#, .Net
• Web API Frameworks (spring, ASP .NET Core, ExpressJS, etc.)
• Frontend Javascript Frameworks (Angular, React, etc.)
• Understanding and usage of the unit testing framework. Like NUnit, x unit, and JUnit
• Knowledge of SQL and writing queries
• Agile and DevOps methodologies
• Effective communication, Teamwork, Team Handling, Adaptability, Flexibility, Leadership, Problem-solving, Work Ethics, and Creativity.
• Well-versed with the version control systems. Like git, gitlab, bitbucket etc. 
• Good to have knowledge of Microservices architecture.

Education Required:

• Candidates with Bachelor's Degree in Computer Science (or equivalent) are preferred.