MERN Stack Developer

Role Overview

We are looking for an Engineering Manager who thrives in a fast-paced startup environment, is hands-on with development, and can lead our engineering team to build and scale robust, high-performing systems. You will drive architectural decisions, mentor a team of talented engineers, and collaborate closely with product, design, and business teams to execute our ambitious roadmap. You will be at the forefront of scaling our infrastructure to support billions of messages, ensuring real-time engagement for businesses at scale.

Key Responsibilities

• Technical Leadership: Own the engineering roadmap, ensuring scalability, reliability, and performance of our systems.
• Hands-on Development: Dive into the code when necessary, set high coding standards, and lead by example.
• Team Management: Lead, mentor, and scale a high-performing engineering team, fostering a strong culture of ownership and innovation.
• System Scalability: Architect and optimize scalable and resilient backend & frontend systems handling millions of messages per day.
• High Availability & Performance: Design systems that can handle billions of API calls and ensure minimal downtime.
• Agile Execution: Drive sprint planning, prioritization, and timely delivery of features in an agile development environment.
• Collaboration: Work closely with product, design, and business teams to align engineering efforts with company goals.
• DevOps & Security: Ensure best practices for CI/CD, cloud infrastructure (AWS/GCP), and security compliance.
• Tech Stack Evolution: Stay ahead of emerging technologies and drive innovation in AiSensy’s architecture.

What You Bring

• 8+ years of experience in software development, with at least 2 years in a leadership/managerial role.
• Expertise in modern tech stacks – Proficiency in MERN (MongoDB, Express, React, Node.js) stack or similar.
• Strong knowledge of cloud platforms (AWS) and microservices architecture.
• Proven experience in scaling high-traffic, distributed systems handling billions of messages per month.
• Hands-on experience with Docker, Kubernetes, and CI/CD pipelines.
• Strong problem-solving skills and an ability to hustle in a fast-paced startup environment.
• Excellent communication skills and a data-driven decision-making approach.
• Passion for building great products, coaching engineers, and driving tech excellence.

What We Offer

• Competitive Compensation & Benefits aligned with your experience and the impact you bring.
• Opportunity for Growth in a rapidly expanding B2B SaaS company.
• Cutting-Edge Technology & Projects in the WhatsApp Business API and Click to WhatsApp Ads space.
• Collaborative Work Environment that fosters innovation, learning, and career development.
• Flexible & Inclusive Culture, where every team member has a voice and the chance to make a significant impact.

Remote position

Full-stack developer | .NET Core + Angular

Are you...

• Interested in working at a successful, well-funded scale-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.

A product manager, a team lead, two full-stack developers, one mobile developer, and a UX designer make up our product team. Who will serve as your mentor. We are looking for a developer who cares about how their code affects users so that we can work together.

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
• .Net Core
• Front end web in TypeScript & Angular
• 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

• 5+ years experience in C#
• Experience with .NET core
• Front-end web experience in Angular and CSS
• Track record of building great products
• You’ll love the idea of being a big part of a small team. Current team size is 5.
• 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 scale-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.

Are you interested to work at a place where you are given the opportunity to grow and level up your skills?

Are you looking to build products that are impactful?

Do you want to work with an energetic team, like-minded and passionate programmers? 

Do you like to create impactful and scalable products?

What we Look for

• Bring in a "can-do" attitude
• Passion towards technology and software engineering - open source, pet projects, conference talks, getting better at writing clean code
• Participate in a highly fluid environment applying agile software development principles
• Carry out unit tests and other quality control mechanisms to inform and validate the designs and code
• Work with product owner/BAs  to bring an end to end perspective of the problem
• Ability to ask the right questions and communicate your ideas with clarity
• Ability to collaborate with various stakeholders and take complete ownership
• Participate actively in building one of the most impactful organizations in retail technology

As a Software Engineer …..

• Quickly adapt to our startup environment which is both demanding and fast-paced (but is also a lot of fun) 
• Eager to learn new concepts, and technologies and be productive in short time
• Convert a raw idea into usable real-life software products 
• Write modular, readable and maintainable code
• Good understanding and working knowledge of technologies worked
• Demonstrate good problem solving skills
• Own and be able to manage a small to medium sized modules
• Demonstrate ability to guide and coach a new team member or fresher

• Multiple consumer-grade B2B apps for our agency partners, powering near real-time quoting, streamlined policy administration and claims management
• Safety platform to help transportation fleets understand and improve their safety
• Lead generation apps to build our customer acquisition funnel

• You have experience with software development/coding.
• You learn quickly and can operate independently. You're not afraid to take something on just because you don’t know how to do it yet.
• You not only have the ability or skill to communicate effectively but also have the willingness to be open and honest in your communication.
• You have a growth mindset. You take data-driven decisions and are constantly looking for opportunities to optimize and enhance our customer experience.

• Competitive weekly pay
• Reimbursement for your home-office setup
• Weekly team events to connect with fun, bright coworkers
• Lots of swag!

Responsibilities:

• Development and Integration of user-facing design elements with server-side logic.
• Design and develop backend API services and databases to serve frontend applications.
• Code for multi-platform environments.
• Build reusable code and libraries for future use.
• Ensure responsiveness of applications.
• Optimization of the application for maximum speed and scalability.

Skills and Qualifications:

• Basic understanding of front-end technologies and platforms, such as JavaScript, HTML5, and CSS3.
• Proficient in Angular JS or ReactJS, Node.js and JavaScript.
• Integration of multiple data sources and databases into one system.
• Management of hosting environment, including database administration and scaling an application to support load changes.
• Understanding differences between multiple delivery platforms such as mobile vs desktop, and optimizing output to match the specific platform.
• Creating database schemas that represent and support business processes in one or more database technologies such as Mongo, MySQL etc.
• Implementing automated testing platforms and unit tests.
• Proficient knowledge of a back-end programming language. (Depending on the specific case, a developer should have the knowledge of one or more of Python, Ruby, JavaScript etc.)
• Proficient understanding of code versioning tools, such as Git.

Academic Qualifications:

• Engineering degree from a reputed institute

Tech Stack :

ANGULARJS, NODEJS, REQUIREJS, EXPRESSJS, HTML5, CSS3, JAVASCRIPT, AJAX, REST API, JQUERY, POSTGRESQL/MYSQL, MVC FRAMEWORK, MICROSERVICES ARCHITECTURE

Responsibilities:

• Design and build advanced applications
• Work with outside data sources and APIs
• Unit-test code for robustness, including edge cases, usability, and general reliability
• Work on bug fixing and improving application performance
• Continuously discover, evaluate, and implement new technologies to maximize development efficiency
• Building reusable code and libraries for future use
• Optimization of the application for maximum speed and scalability
• Implementation of security and data protection
• Able to understand and create Documentation according to Client requirement.

Requirements:

• Ability to write clean, commented and maintainable code.
• Basic understanding of microservices.
• Basic understanding in designing, architecting, developing enterprise class products and solutions.
• Basic understanding of MVC frameworks.
• Good understanding of front-end technologies and platforms, such as JavaScript, HTML5, and CSS3.
• Understanding accessibility and security compliance.
• User authentication and authorization between multiple systems, servers, and environments.
• Integration of multiple data sources and databases into one system.
• Basic understanding data migration, transformation, and scripting.
• Understanding differences between multiple delivery platforms such as mobile vs desktop, and optimizing output to match the specific platform.
• Basic understanding of a back-end programming concepts.
• Basic understanding of code versioning tools, such as Git.
• Proper understanding of OOPS concepts.
• Creating database schemas that represent and support business processes.
• Understanding of startup culture.
• Good team player, Quick learner.