Senior Full Stack Developer (React.js, Node.js, C#, .NET)

Lead technical Consultant

Experience: 9-15 Years

This is a Backend-heavy Polyglot developer role - 80% Backend 20% Frontend

Backend 

1. 1st Primary Language - Java or Python or Go Or ROR or Rust 
2. 2nd Primary Language - one of the above or Node

The candidate should be experienced in atleast 2 backend tech stacks.

Frontend 

1. React or Angular 
2. HTML, CSS

The interview process would be quite complex and require depth of experience. The candidate should be hands-on in backend and frontend development (80-20)

The candidate should have experience with Unit testing, CI/CD, devops etc.

Good Communication skills is a must have.

Job Title : Full Stack .NET Developer (Blazor / WPF / Web API / Device Integration)

Location :Bangalore

Experience : 3–6 Years

Employment Type : Full-Time

Job Summary

We are looking for a skilled Full Stack .NET Developer with strong expertise in .NET Core, Web API, Blazor, and WPF, along with hands-on experience in device and hardware integration. The ideal candidate will work on web and desktop applications that integrate with peripherals such as cash acceptors, payment devices, printers, and other kiosk hardware, delivering secure, high-performance, and reliable solutions.

Key Responsibilities

• Design, develop, test, and maintain applications using C#, .NET Core, and ASP.NET Core Web API
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• Develop modern web applications using Blazor (Server and/or WebAssembly)
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• Build and maintain WPF desktop applications using MVVM architecture
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• Design, develop, and consume RESTful APIs for web, desktop, and device-based applications
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• Integrate and manage hardware devices such as cash acceptors, payment terminals, printers, scanners, and other peripherals
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• Work with device SDKs, drivers, COM/USB/Serial (RS232) communication, and third-party APIs
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• Handle device error states, retries, logging, and recovery mechanisms
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• Develop and optimize database objects using MS SQL Server
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• Ensure application performance, security, and scalability, especially in hardware-dependent environments
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• Debug, troubleshoot, and resolve application and device-related issues
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• Collaborate with cross-functional teams to translate business and hardware requirements into technical solutions
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• Participate in code reviews and follow best coding standards and practices
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Technical Must-Have Skills

• Strong proficiency in C# and .NET Core
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• Hands-on experience with ASP.NET Core Web API
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• Strong experience with Blazor (Server and/or WebAssembly)
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• Experience developing WPF desktop applications
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• Solid understanding of MVVM and MVC architecture
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• Experience with device/hardware integration, including:
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• Cash acceptors / bill validators
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• Payment devices (POS, card readers, UPI, NFC)
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• Printers (thermal, receipt, barcode)
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• Knowledge of Serial/USB/TCP-IP communication protocols
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• Strong knowledge of MS SQL Server
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• Experience with RESTful API design and integration
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• Familiarity with Git or other version control systems
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Good-to-Have Skills

• Experience with Entity Framework / EF Core
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• Understanding of Microservices architecture
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• Experience working on kiosk-based or embedded systems
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Soft Skills

• Strong problem-solving and analytical skills
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• Good communication and teamwork abilities
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• Ability to work independently with minimal supervision
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• Attention to detail and commitment to quality
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Educational Qualification

• Bachelor’s degree in Computer Science, Engineering, or a related technical field
• (Equivalent hands-on experience in .NET Core, Blazor, WPF, Web API, and device integration will also be considered)

 Skill set: ASP.Net, Web, MySQL, C+, HTML, ASP.Net Angular(good to have), 

Job Description as mentioned below: · 

MS SQL; Database design, 

Stored Procedure, Functions, 

Views, triggers, and advanced queries · 

C# version 4 or higher. · 

Visual Studio 2013 or later. · 

ASP.NET web forms knowledge · 

Advanced JQuery/JavaScript · 

Ability to understand the existing applications and work on enhancements · Ability to understand requirements quickly · Documentation skills , Requirement Analysis · 

Good Communication skills 

You will make an ideal candidate if you have: 

• Overall 6+  years of software development experience in building web-based and highly scalable applications 

• Excellent understanding of core computer science concepts like algorithms, data structure, system design, OOP, etc. 

• Deep knowledge and development expertise in Core Java and SpringBoot 

• Experience in using dockers and Linux.

• Hands-on coding experience in developing web applications with REST APIs

• Good understanding/exposure to Kafka and Elastic.(must have)

• Log stash understanding is add-on

• Worked in a CI/CD environment with Jenkins and handled deployments by yourself 

• Experience working in an agile team with software engineering practices like automated testing, test-driven-development, continuous integration, etc is a big plus. 

Roles and Responsibilities :

Developing front end website architecture.
Designing user interactions on web pages.
Developing back end website applications.
Creating servers and databases for functionality.
Ensuring cross-platform optimization for mobile phones.
Ensuring responsiveness of applications.
Working alongside graphic designers for web design features.
Seeing through a project from conception to finished product.
Designing and developing APIs.
Meeting both technical and consumer needs.
Staying abreast of developments in web applications and programming languages.

Desired Candidate Profile :

HTML/CSS. While HTML stands for Hypertext Markup Language, CSS stands for Cascading Style Sheets. ...

JavaScript. ...

Git and GitHub. ...

Backend languages. ...

Web architecture. ...

HTTP and REST. ...

Database storage. ...

Basic design skills.

Familiar with nodejs, reactjs, angularjs, expressjs etc......

About us

404 DM is a fast-growing data-driven creative solutions provider, with a portfolio of brands that include Myntra, Flipkart, and Wildcraft. Our team essentially stands for all things digital with an abundance of creativity. The focus lies in building - right from crafting compelling narratives that capture a brand's essence to the long-lasting relationships that are developed with each and every client, the agency believes that this is the driving force behind the work they do. 404 DM offers a wide variety of services in the digital sphere, including design, technology, media planning, and above all, creative strategizing that helps brands stand out amidst their contemporaries.

We are building this really cool product that will change the way brands do their marketing and acquire customers. We're looking for equally driven and highly skilled people to join us. We'd love to have a conversation with you and see if you and our team are the right fit for each other.

Roles and Responsibilities

• Defines site objectives by analyzing user requirements; envisioning system features and functionality.
• Designs and develops user interfaces to Internet/intranet applications by setting expectations and features priorities throughout the development life cycle; determining design methodologies and toolsets; completing programming using languages and software products; designing and conducting tests.
• Recommends system solutions by comparing advantages and disadvantages of custom development and purchase alternatives.
• Integrates applications by designing database architecture and server scripting; studying and establishing connectivity with network systems, search engines, and information servers.
• Completes applications development by coordinating requirements, schedules, and activities; contributing to team meetings; troubleshooting development and production problems across multiple environments and operating platforms.
• Enhances organization reputation by accepting ownership for accomplishing new and different requests; exploring opportunities to add value to job accomplishments.
• Supports and develops web application developers by providing advice, coaching.
• SADs (Senior application Developer ) maintain the job duties of a supervisor as well as a lower-level application developer These duties can include regular consultations with the Team concerning software, creating new programs, and testing newly installed programs to verify functionality.
• The managerial side of being a leader can include writing reports on team progress and presenting those reports to upper executive committees, per Coding standards. SADs also make executive-level standards decisions for their department, ensure company policies are being followed and counsel employees as needed

Desired Candidate Profile

• Bachelor's or Master's degree in information technology or computer sciences. Combining full - time academics degree with certification in computer languages and software programs could be an added advantage.
• At least 5 to 8 years of experience as a leader with hands-on experience in programming languages such as Javascript, HTML, C++, PHP, Angular, Ajax, Rest Api, Node.Js, JQuery, MySQL, API Oath Integration, Shopify, Open Source app development, Social media Developer tool.

• Own our user interfaces with an eye to lightning-fast performance and a great user experience
• Implement compelling and intuitive UIs, shaping the design and feel of the product alongside our founders
• Write a significant amount of code for new and existing features
• Ship high-quality code and architecture
• Mentor engineers on the team, developing their skills and helping advance their careers
• Help shape the future of our engineering organization

Requirements

• You have been building production web applications for 5+ years and know the systems from top to bottom
• You know SQL and have significant programming experience on the frontend with React
• You have a BS/MS/Ph.D. in a scientific field or equivalent experience
• You want to work in a fast-paced, high-growth startup environment that respects its engineers and customers
• Comfortable working with a 100% distributed engineering team, collaborating on GitHub, Slack, Zoom, etc. in the open and as a self-starter.

Bonus points

• You have backend experience building microservices
• You’ve contributed to open-source libraries and actively participate in the development community (blogging, meetups, tweeting, etc.)
• You have experience building interactive data visualizations
• You have worked in TypeScript, Java, Go

- Experience with front-end technologies such as Angular or React with Redux. 

- Experience working in NodeJS with Express 

- Experience with PHP development using any one of it's framework will be considered as    a value add 

- Experience working with SQL or NoSQL databases, the ability to write efficient queries        and benchmark/profile them 

- Mastery of object oriented JavaScript, ES6, HTML, and CSS/SASS/StyledComponents 

- Experience in RESTful API development 

- Strong understanding of asynchronous programming 

- Experience with performance debugging and benchmarking 

- Experience with testing frameworks like Karma, mocha, or jest 

- Experience with Git version control 

- Understanding of CI/CD 

- Strong attention to design detail (UI/UX).