.NET Core Backend Developer (API Developer)

Python Developer - AI/MLYour Responsibilities

• Develop, train, and optimize ML models using PyTorch, TensorFlow, and Keras.
• Build end-to-end LLM and RAG pipelines using LangChain and LangGraph.
• Work with LLM APIs (OpenAI, Anthropic Claude, Azure OpenAI) and implement prompt engineering strategies.
• Utilize Hugging Face Transformers for model fine-tuning and deployment.
• Integrate embedding models for semantic search and retrieval systems.
• Work with transformer-based architectures (BERT, GPT, LLaMA, Mistral) for production use cases.
• Implement LLM evaluation frameworks (RAGAS, LangSmith) and performance optimization.
• Design and maintain Python microservices using FastAPI with REST/GraphQL APIs.
• Implement real-time communication with FastAPI WebSockets.
• Implement pgvector for embedding storage and similarity search with efficient indexing strategies.
• Integrate vector databases (pgvector, Pinecone, Weaviate, FAISS, Milvus) for retrieval pipelines.
• Containerize AI services with Docker and deploy on Kubernetes (EKS/GKE/AKS).
• Configure AWS infrastructure (EC2, S3, RDS, SageMaker, Lambda, CloudWatch) for AI/ML workloads.
• Version ML experiments using MLflow, Weights & Biases, or Neptune.
• Deploy models using serving frameworks (TorchServe, BentoML, TensorFlow Serving).
• Implement model monitoring, drift detection, and automated retraining pipelines.
• Build CI/CD pipelines for automated testing and deployment with ≥80% test coverage (pytest).
• Follow security best practices for AI systems (prompt injection prevention, data privacy, API key management).
• Participate in code reviews, tech talks, and AI learning sessions.
• Follow Agile/Scrum methodologies and Git best practices.

Required Qualifications

• Bachelor's or Master's degree in Computer Science, AI/ML, or related field.
• 2–5 years of Python development experience (Python 3.9+) with strong AI/ML background.
• Hands-on experience with LangChain and LangGraph for building LLM-powered workflows and RAG systems.
• Deep learning experience with PyTorch or TensorFlow.
• Experience with Hugging Face Transformers and model fine-tuning.
• Proficiency with LLM APIs (OpenAI, Anthropic, Azure OpenAI) and prompt engineering.
• Strong experience with FastAPI frameworks.
• Proficiency in PostgreSQL with pgvector extension for embedding storage and similarity search.
• Experience with vector databases (pgvector, Pinecone, Weaviate, FAISS, or Milvus).
• Experience with model versioning tools (MLflow, Weights & Biases, or Neptune).
• Hands-on with Docker, Kubernetes basics, and AWS cloud services.
• Skilled in Git workflows, automated testing (pytest), and CI/CD practices.
• Understanding of security principles for AI systems.
• Excellent communication and analytical thinking.

Nice to Have

• Experience with multiple vector databases (Pinecone, Weaviate, FAISS, Milvus).
• Knowledge of advanced LLM fine-tuning (LoRA, QLoRA, PEFT) and RLHF.
• Experience with model serving frameworks and distributed training.
• Familiarity with workflow orchestration tools (Airflow, Prefect, Dagster).
• Knowledge of quantization and model compression techniques.
• Experience with infrastructure as code (Terraform, CloudFormation).
• Familiarity with data versioning tools (DVC) and AutoML.
• Experience with Streamlit or Gradio for ML demos.
• Background in statistics, optimization, or applied mathematics.
• Contributions to AI/ML or LangChain/LangGraph open-source projects.

We are looking for a Senior .NET Developer with 4+ years of experience to join our growing team. The ideal candidate should have deep expertise in C#, ASP.NET Core/.NET Framework and API development. You will play a crucial role in designing, developing, and optimizing robust applications while mentoring junior developers and ensuring best coding practices. 

Key Responsibilities: 

• Architect, design, develop, and maintain scalable .NET applications using C# and ASP.NET Core/.NET Framework. 
• Design and implement RESTful APIs to facilitate seamless data exchange. 
• Optimize database queries and work with SQL databases for high-performance applications. 
• Conduct code reviews, enforce best practices, and mentor junior developers. 
• Debug, troubleshoot, and enhance existing applications for improved efficiency. 
• Work closely with cross-functional teams to define requirements and deliver high-quality solutions. 
• Stay updated with emerging .NET technologies and contribute to process improvements. 

Required Skills & Qualifications: 

• 4+ years of hands-on experience in .NET development. 
• Expertise in C#, ASP.NET Core/.NET Framework, and API development. 
• Solid understanding of OOP principles, SOLID design patterns, and best coding practices. 
• Experience with SQL databases, query optimization, and stored procedures. 
• Proficiency in Git or other version control systems. 
• Strong problem-solving skills and ability to troubleshoot complex issues. 
• Exposure to Agile methodologies and DevOps practices. 

Job Description:      

Min 2 to 4 Years of experience in C# and ASP.NET, Web application development.

Knowledge about cloud programming or migration to cloud is preferred.

 Mandatory skills:

• Proficient in Web Application development using ASP.NET, C# with .Net version 4.0/ 4.5.
• Experience with SQL Server or any other equivalent Database and know how to build efficient queries.
• Strong knowledge on jQuery, AJAX, JavaScript, HTML5, CSS3 and Bootstrap.
• Experience in debugging in multiple browsers.
• Strong understanding of object-oriented programming.
• Clear understanding of SVN or an equivalent VCS.
• Familiar with IIS and deploying code to Web Server.
• Should have excellent analytical and communication skills.

 Responsibilities:

• Good hands on designing, coding, debugging, technical problem solving, and writing Unit Test cases, etc.
• Translate use cases into functional applications
• Design, build, and maintain efficient, reusable, and reliable C# code
• Ensure the best possible performance, quality, and responsiveness of applications
• Help maintain code quality
• Able to work well in a team setting

 Academic Qualifications Required:

•  B.E. / B.Tech. /MSC in Computer Science or IT.

 Qualifications

M.C.A

B Tech

Who You Are:

• You’ve built scalable, production-ready APIs in fast-paced environments, and are comfortable with the challenges that come with a growing startup.
• You understand event-driven architectures and have hands-on experience building real-time applications.
• You are fully capable of taking ownership of backend systems, from designing the database schema to writing efficient, maintainable code.
• You think beyond the code: optimizing performance, scalability, and security are as important as building new features.
• You’re comfortable troubleshooting complex issues, whether that’s API bottlenecks, database performance, or production issues.

Responsibilities:

• Design, implement, and manage a NestJS backend with a modular, scalable architecture that can easily handle real-time events and communication.
• Develop and maintain WebSocket services for real-time event-driven updates and ensure seamless communication across the system.
• Integrate RabbitMQ for reliable internal messaging, handling queues and ensuring event-driven workflows are efficient and fault-tolerant.
• Implement database management strategies using MongoDB, Redis, and Elasticsearch, ensuring efficient data handling, indexing, and optimization.
• Integrate with external APIs (JSON-RPC, XML-RPC, REST) to enhance system capabilities.
• Ensure high performance of the system by optimizing database queries, implementing caching strategies using Redis, and ensuring optimal indexing and data flow.
• Implement role-based authentication and authorization mechanisms using JWT, OAuth, and RBAC patterns within NestJS.
• Follow security best practices to ensure sensitive data is protected, credentials are stored securely, and the system is resilient to common vulnerabilities.
• Work collaboratively with cross-functional teams to ensure seamless integration between different services and technologies.

Must-Have Skills:

• Strong proficiency in Node.js and NestJS with TypeScript.
• Solid experience with MongoDB, Redis, and Elasticsearch for data storage and real-time data handling.
• In-depth knowledge of WebSockets and Socket.IO in NestJS Gateways, enabling real-time communication and updates.
• Experience with RabbitMQ for message queuing and asynchronous task handling.
• Strong understanding of authentication & authorization systems using JWT, OAuth, and RBAC (Role-Based Access Control).
• Expertise in optimizing APIs, including techniques for caching, improving database performance, and reducing latency.
• Familiar with API security best practices, including secure storage of credentials, encryption, and safeguarding sensitive data.

Key Skills:

• TypeScript, NestJS, WebSockets, Socket.io
• Redis, MongoDB, Elasticsearch, RabbitMQ
• API Optimization, JWT, OAuth, RBAC
• Real-time communication, Event-driven architecture

Job Title: Senior Ruby on Rails Developer

Location: Remote (Mumbai Preferred)

Company: OpiGo

About Us:

OpiGo is an early-stage wealth tech start-up that’s changing the way people invest in the stock market. Our platform empowers users to make informed investment decisions through a cutting-edge gamified community.

Job Description:

As the Senior Ruby on Rails Developer at OpiGo, you will play a crucial role in architecting, developing, and maintaining our robust and scalable investing platform. You will work closely with the product team and other stakeholders to drive innovation and deliver exceptional user experiences.

Requirements:

- 5+ years of Ruby on Rails development experience.

- Strong understanding of Ruby programming language and its scope.

- Experience in building complex and scalable web applications.

- Familiarity with front-end technologies: React Native, JavaScript, HTML5, CSS3.

- Proficient in version control systems (e.g., Git, SVN).

- Expertise in relational databases (MySQL, PostgreSQL, etc.).

- Hands-on experience with Sidekiq, Redis, and background job processing systems.

- Ability to implement real-time features using WebSockets and Action Cable.

- Experience in monitoring and performance tuning with tools like New Relic.

- Knowledge of payment gateway integration and secure transaction processing.

- Experience deploying applications on cloud platforms like AWS or Google Cloud.

- Excellent interpersonal, communication, and teamwork skills.

- Understanding of Agile development methodologies and software development practices.

Preferred Qualifications:

1. Experience in the fintech industry or working on financial applications.

2. Knowledge of frontend technologies such as React Native, JavaScript, HTML5, and CSS3.

3. Experience with DevOps practices and CI/CD pipelines.

4. Familiarity with Docker and container orchestration platforms like Kubernetes.

5. Contributions to open-source projects or active participation in the developer community.

Join us in our mission to revolutionize the investing landscape and empower individuals to achieve financial success. If you are passionate about technology, innovation, and making a positive impact, we want to hear from you!

How to Apply:

If you're excited to take on this pivotal role and shape the future of OpiGo, please fill up the form: https://forms.gle/5euWxq1hBfQTDadD6

Detailed JD: 

Responsibilities:

- Interface with product owners and software architects to review and finalize requirements

- Participate in the full SDLC including analysis, design, development, testing, deployment, and support

of new features and applications

- Actively lead and participate in agile ceremonies (Standups, Refinements, Retrospectives, Planning,

and Requirement discussions)

- Communicate effectively, clearly, and thoroughly with the Scrum Team and Stakeholders

- Provide innovative solutions to complex problems

- Design, develop and modify software applications/systems according to specifications

- Develop technical documentation including services, object, and data model

- Create high quality code and perform code reviews

- Create unit and integration tests to ensure the code quality and functionality

- Proactively learn and share knowledge of technology and compare advantages and disadvantages of

alternative solutions/technologies

- Identify areas needing process improvements and see them through to resolution

- Support and coach other Developers, provide technical guidance

- Help onboard new team members

Tech Stack:

C#, .NET Core, XUnit, Entity Framework Core, MS SQL Server, PostgreSQL, Git, JIRA, Web API

Job Description:

• Excellent troubleshooting and communication skills
• Participate in requirements analysis and give estimates for development.
• Collaborate with internal teams to produce software design and architecture
• Client handling experience
• Write clean, scalable code using .NET programming languages
• Test and deploy applications and systems
• Revise, update, refactor and debug code
• Improve existing software
• Ability to work as a team player also as an individual contributor.
• Understanding of Scrum, Agile and Agile processes.

Required Knowledge, Skills, and Abilities:

• 3+ years of C#, .Net core, ASP.NET MVC professional development experience
• Candidate should have  hands-on with Logic App, Function App, Azure Function
• Working experience on SQL Server and No SQL Database
• Experience in ORM like LINQ & Entity Framework
• Knowledge of the NoSQL Database will be a great advantage.
• Great analytical skills and logical reasoning.
• Thorough understanding of object-oriented programming concepts, and data structures.
• Experience designing and consuming REST APIs
• Experience in JavaScript, jQuery or related frameworks.
• Knowledge of Code Repository systems including GIT, Github & SVN
• Should have strong practical knowledge of API Management Services (APIM)
• Good to have: Angular JS, React JS or any other frameworks.

Tools :  Visual Studio ,Visual studio code ,SQL server management studio, swagger and postman tool
Educational Qualification: BE, MCA OR Msc IT