Software developer

Position: Full-Stack Developer – React / C# / Python / SQL

Location: Mumbai / Pune

Experience: 6–8 Years

Employment Type: Full-time

About the Role

We are looking for a versatile Full-Stack Developer who has working experience in React, C# or Python, and SQL. The candidate doesn’t need to be an expert in all these technologies but should be comfortable taking end-to-end ownership of features with the support of modern AI tools.

Key Responsibilities

• Develop, test, and maintain scalable frontend applications using React.
• Build and integrate backend services using C# (.NET) or Python.
• Write and optimize SQL queries, procedures, and data models.
• Work closely with product and design teams to deliver high-quality features.
• Use AI-assisted development tools (like GitHub Copilot / ChatGPT) to speed up coding, debugging, documentation, and solution design.
• Participate in code reviews, troubleshooting, and performance improvements.
• Ensure best practices in code quality, security, and deployment.

Required Skill Set

• Frontend

React.js (Hooks, components, state management, API integration)

• Backend (any one or both)

C# (.NET Core)

Python (FastAPI / Django / Flask)

• Database

SQL (MySQL / PostgreSQL / MSSQL)

Experience writing queries, joins, stored procedures, and handling schemas

Good to Have

• REST API development
• Basic DevOps understanding (CI/CD, version control – Git)
• Familiarity with cloud platforms (AWS/Azure/GCP)
• Ability to learn quickly with AI tools and follow best practices
• Problem-solving and ownership mindset

What We Are Looking For

• Someone who can handle full-stack tasks with confidence
• Not necessary to be an expert in everything
• Curious, adaptable, and open to using AI tools to deliver faster
• Strong communication skills and team collaboration

About the Role:

We are seeking a highly skilled Integration Specialist / Full Stack Developer with strong experience in .NET Core, API integrations, and modern front-end development. The ideal candidate will build and integrate scalable web and mobile applications, manage end-to-end delivery, and ensure smooth data exchange across platforms.

Key Responsibilities:

• Design, develop, and maintain backend APIs using .NET Core / C#.
• Build and integrate REST and SOAP-based services (JSON, XML, OAuth2, JWT, API Key).
• Implement file-based integrations (Flat file, CSV, Excel, XML, JSON) and manage FTP/SFTP transfers.
• Work with databases such as MSSQL, PostgreSQL, Oracle, and SQLite — including writing queries, stored procedures, and using ADO.NET.
• Handle data serialization/deserialization using Newtonsoft.Json or System.Text.Json.
• Implement robust error handling and logging with Serilog, NLog, or log4net.
• Automate and schedule processes using Quartz.NET, Hangfire, or Windows Task Scheduler.
• Manage version control and CI/CD pipelines via Git and Azure DevOps.
• Develop front-end interfaces with React and React Native ensuring responsive, modular UI.
• Implement offline-first functionality for mobile apps (sync logic, caching, etc.).
• Collaborate with cross-functional teams or independently handle full project ownership.
• Utilize AI-assisted development tools (e.g., Cursor, GitHub Copilot, Claude Code) to enhance productivity.
• Apply integration best practices including middleware, API gateways, and optionally message queues (MSMQ, RabbitMQ).
• Ensure scalability, security, and performance in all deliverables.

Key Skills & Technologies:

• Backend: .NET Core, C#, REST/SOAP APIs, WCF, ADO.NET
• Frontend: React, React Native
• Databases: MSSQL, PostgreSQL, Oracle, SQLite
• Tools: Git, Azure DevOps, Hangfire, Quartz.NET, Serilog/NLog
• Integration: JSON, XML, CSV, FTP/SFTP, OAuth2, JWT
• DevOps: CI/CD automation, deployment pipelines
• Optional: Middleware, API Gateway, Message Queues (MSMQ, RabbitMQ)

Qualifications:

• Bachelor’s degree in Computer Science, Engineering, or a related field.
• Minimum 5 years of hands-on experience in software development and integration.
• Proven expertise in designing and implementing scalable applications.
• Strong analytical and problem-solving skills with a proactive approach.

Nice to Have:

• Experience with cloud services (Azure, AWS, GCP).
• Knowledge of containerization tools like Docker or Kubernetes.
• Familiarity with mobile deployment workflows and app store publishing.

Essential Functions/Responsibilities

• Provide hands-on development in the application development, unit test, and rollout of

strategic web and Mobile initiatives.

• Develop both front-end and back-end for web/mobile applications, working with a hybrid

internal/vendor team, to support various lines of business and functional areas

• Work with Business Owners and Business Analysis teams, to create business requirements.

• Document technical requirements and technical specifications for Web/Mobile

applications (and related integrated solutions) and provide technical solutions to support

those needs.

• Provide feedback (and approval) on technical designs and methods to support business

requirements.

• Effectively communicate relevant project planning and status information to

leadership/management.

• Deliver engaging, informa<ve, well-organized demos/presenta<ons that are effectively

tailored to the intended audience, as needed

Must Have Skills:

• Experience with the .NET framework and .NET Core technologies: C#
• Writing and consuming REST API/Web API in .Net framework, .Net Core, EF Core
• Experience with frontend technology - ReactJS
• Knowledge of Reporting like Xtra Reports or PDF Generation Libraries
• Good knowledge and working experience in Microservice Architecture In Azure Cloud Env.
• Advanced understanding of Azure Web App, Azure Storage Accounts, Azure Databases (PostgreSQL, MS Sql), OAuth2 Authentication (Auth Flows)
• Strong understanding of OOPS Concepts
• Very Good understanding of common cloud patterns, like messaging (consuming + producing messages), scaling, api patterns, (for example: IOSP or SOLID), etc.
• Strong knowledge of Unit Testing Tools
• RDBMS Concepts, MS-SQL Server
• Writing & Optimizing SQL Queries for best performance
• Excellent Aptitude, Attitude and Communication Skills
• 
  

Good to have Skills:

• Knowledge of HTML, Bootstrap, CSS, and Responsive Design
• Typescript / React and/or Terraform for IaC
• Enterprise service bus technologies, idelly Azure Serivce bus
• Knowledge in Azure hosting services
• Docker
• Entity Framework/LINQ, MVC
• Strong understanding of current design patterns & best practices
• Knowledge of Agile methodology and JIRA
• Knowledge CI/CD pipeline to deploy applications in Azure
• Understand the architecture and design lingoes and work with lead developers

Key Responsibilities:

• Convert design and architecture to code using best practices
• Able to troubleshoot and debug the code, write code with best coding practice and perform unit & Integration testing
• Design and develop software applications
• Work with Scrum Team to prioritize tasks and ensure deadlines are met
• Communicate and actively participate in client call and understand requirements
• Demonstrate expertise in a variety of software concepts (object-oriented design), practices (design patterns), and procedures (troubleshooting defects)
• Use and set-up CI/CD pipeline

Apply

ob Description: .NET Core Developer (3+ years of experience)

We are seeking a skilled and experienced .NET Core Developer with a minimum of 3 years of professional experience. The ideal candidate should possess a strong proficiency in C#, creating REST APIs, caching, JSON, authentication, authorization, and the web application development life cycle. The candidate should also be well-versed in standard industry practices, demonstrating expertise in proper coding practices, code commenting, and unit testing. A good understanding of software architecture is crucial for this role, while experience with SQL is considered a plus.

Responsibilities:

· Develop and maintain robust, scalable, and high-performance applications using .NET Core 6 and C#

· Create efficient and secure REST APIs for seamless integration with other systems

· Implement caching mechanisms to enhance application performance

· Work with JSON data structures to handle data exchange and serialization

· Ensure proper authentication and authorization mechanisms are implemented

· Follow the web application development life cycle from requirements gathering to deployment and maintenance

· Adhere to standard industry practices and coding standards to ensure high-quality code

· Implement proper code commenting for maintainability and future enhancements

· Conduct unit testing to validate functionality and identify potential issues

· Collaborate with cross-functional teams to analyze requirements and propose software solutions

· Provide technical guidance and support to junior developers as needed

Requirements:

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

· Minimum of 3 years of professional experience as a .NET Core developer

· Proficiency in C# and experience with .NET Core 6

· Strong knowledge and hands-on experience in creating REST APIs

· Familiarity with caching mechanisms and their implementation

· Solid understanding of JSON for data exchange and serialization

· Experience implementing authentication and authorization in web applications

· Thorough understanding of the web application development life cycle

· Strong adherence to standard industry practices and coding standards

· Proficient in code commenting and following proper coding practices

· Experience with unit testing frameworks and test-driven development

· Good understanding of software architecture principles and patterns

· Knowledge of SQL and experience working with relational databases (preferred)

· Good working knowledge of Azure DevOps

· Excellent problem-solving and analytical skills

· Strong communication and teamwork abilities

Join our dynamic and innovative team, and contribute to the development of cutting-edge applications using the latest technologies. We offer competitive compensation and benefits packages, as well as opportunities for professional growth and advancement.

• Technical skills in C# .NET Core, ASP.NET MVC and Entity framework, LINQ and REST APIs
• Additional skills in MySQL and SQL server, Ajax, jQuery, ReactJS, HTML, Javascript, XML
• Have good analytical ability to breakdown problem statements into solutions
• Working knowledge of various development tools like IDE’s (VS2008 or above), source control systems like TFS, Subversion.
• Good at Troubleshooting, problem solving and has supported customers in production environment
• Experience in Test driven development is desirable.
• Strong written and verbal communication skills and the ability to follow verbal/written instructions
• Ability to troubleshoot assigned technical issues and also the ability to meet tight project deadlines
• MUST have experience in major systems development and implementation
• Leading a team would be an added advantage.

Full-stack developer  - Remote position

Are you...

• Interested in working at a successful, well-funded start-up where every team member can make a huge contribution?
• Keen to make software that people will use every single day to make their lives easier?
• Excited to work on greenfield projects with responsibility and independence?
• Ready to develop and use your skills across our frontend, backend and mobile offerings?
• Meticulous about quality, and gifted with a strong desire to write beautiful code?

About the company

KeyNest solves the key exchange problem for Airbnb users. Our worldwide network of over 4,000 shops store keys so that Airbnb guests / cleaners / contractors can pick them up whenever is convenient for them. As a global partner of Airbnb we’ve checked-in over 2 million guests.

Why we need you

As the entire Airbnb ecosystem increasingly relies on KeyNest, our customers expect us to integrate additional features without reducing the ease of use that our customers love. This is why we continue to invest in beautiful, intuitive user interfaces that integrate with every tool and are used by our customers, their guests and staff, as well as our own staff.

Our product team is lead by one of the founders and complete with a director of engineering, product manager, UX designer, one mobile developer and one senior full-stack developer who will be mentoring you. We want to work with a developer who cares about the way their code impacts the people who use it.

With a genuine passion for high quality work, attention to detail and readiness to own your own projects, you will be looking for a new and exciting challenge which allows you to use your experience to drive change and maintain the high standards of our organisation.

Our Tech Stack

• C# MVC modern tech stack
• Front end web in TypeScript & Angular or Node & React
• Test Driven Development (TDD) and follow SOLID design principles.
• EF 6.0
• SQL Server 2017
• Agile experience (Scrum, Kanban)
• TFS
• Cloud hosted in Azure with micro-services architecture

Your qualities

• 2-4 years experience in C#
• Front-end web experience in Angular
• Track record of building great products
• Excited about understanding the real problems working people come up against and fixing them with technology
• You’ll love the idea of being a big part of a small team: if you come up with a great idea, you can take it all the way to production
• Motivation and ambition to succeed in a fast-paced environment
• Not afraid to take on responsibilities

What we offer

• Crucial role in a funded, dynamic & fast-growing start-up shaking up the sharing economy
• Competitive salary based on relevant experience
• Flexible working for our most committed staff
• Unparalleled opportunities to develop your career as the company develops rapidly

If you want to join the KeyNest team, please get in touch – we look forward to meeting you.

We are an equal opportunity employer and value diversity at our company. We do not discriminate on the basis of race, religion, colour, national origin, gender, sexual orientation, age, marital status, veteran status, or disability status.

• Proficient in .NET technology preferred (C#) & MS SQL WWF/WCF/WPF.
• Proficiency in.NET Framework & NET Technology preferred (C#) is necessary.
• Knowledge and working experience in MS SQL2008,2012,2014
• Good understanding of object-oriented programming (OOPs).
• Expertise in designing and working with MVC architecture is necessary.
• JQuery, AJAX, Bootstrap, Web API
• Knowledge of security implications of web applications and have experience designing secure
  web applications.
• Ability to document all development related activities.
• Provide support for all Technical requirements to include problem identification, reporting, analysis and resolution.
• To work independently on Entire Architecture Design.
• Priority will be given having Experience in third Party Integration.
• Proficient understanding of code versioning tools such as Git / Mercurial / SVN
• Azure certification(s) of any kind.
  
  

DESIRED PROFILE

• She/he should be enthusiastic in the job role and a good team player.
• Self-motivated with a passion to code and willing to meet aggressive timelines.
• Strong Logical ability thinking skills to meet Client Requirements in specified time.