Senior Software Engineer ( BACKEND)

Project Overview

We’re building Express AI, a SaaS platform that allows small and medium-sized businesses (SMBs) to easily train and deploy their own dedicated AI agents for customer service, technical support, sales, and more.

Our vision is to give SMBs the power of enterprise-grade AI without complexity. You’ll help build the core platform that powers this – including agent training interfaces, web deployment, dashboards, and integrations.

Key Responsibilities

• Develop scalable full-stack features using modern JavaScript frameworks

• Build and maintain AI agent training modules (upload docs, FAQs, tone settings)

• Integrate OpenAI, Whisper, LangChain, and other LLM APIs

• Implement user-facing dashboards for chat/voices/social/email agent monitoring

• Design multi-tenant systems with admin-level controls

• Ensure reliability and scalability of the platform as we grow

Tech Stack

• Frontend: React.js, Next.js, TypeScript

• Backend: Node.js, Express, MongoDB (or Postgres), Redis

• AI & NLP: OpenAI API (ChatGPT, Whisper), LangChain, Python (optional)

• DevOps: Docker, AWS or GCP (basic familiarity okay)

• Other: WebSockets for real-time chat, REST APIs, Git

Role Type

• Full Stack Developer (preferred)

• Frontend or Backend specialists also considered, but must be willing to collaborate on both sides

Experience Level

• 3 to 6 years of professional experience

• Previous work with SaaS platforms, AI tools, or multi-tenant architecture is a big plus

Must-Have Skills

• Proficiency in JavaScript/TypeScript

• Strong experience with React.js and Node.js

• Experience working with REST APIs and building secure web apps

• Solid understanding of cloud deployment (AWS/GCP/Firebase)

• Ability to work independently, self-manage, and deliver in a fast-paced environment

Nice-to-Have Skills

• Familiarity with LangChain, OpenAI, AI agent frameworks

• Experience with voice/chat integration

• Prior experience building tools for SMBs or customer support systems

Engagement Type

• Full-time (preferred) or part-time with clear weekly availability

• Remote (India-based candidates only)

Why Join Us?

• Work on a cutting-edge AI platform solving real problems for real businesses

• Fast-moving, no-red-tape team environment

• Build something that will impact millions of small businesses globally

Mandatory Skills

• C/C++ Programming
• Linux System concepts
• Good Written and verbal communication skills
• Good problem-solving skills
• Python scripting experience
• Prior experience in Continuous Integration and Build System is a plus
• SCM tools like git, perforce etc is a plus
• Repo, Git and Gerrit tools
• Android Build system expertise
• Automation development experience with like Electric Commander, Jenkins, Hudson

Job Description

Job Purpose 

We work in the latest technology, and our foundations are data structures, algorithms, strong logical reasoning, and mathematics. We are looking for very strong engineers who love coding, optimizing, and making sure their code is the most efficient possible.

You will be involved with hardcore development. If you are an assembler of code or packages from different places to build something, you may not find our team to be the right fit.

You must be someone who can build anything from the ground up. Programming language should not be any barrier for you, as you should be able to pick up any programming language or underlying technology within a week.

Key Areas of Responsibility

Core development. Ready to participate in designing, brainstorming, and development process. You must give sleepless nights to meet deadlines whenever required.

Desired Candidate Profile

Essential Skills 

• Reliable, Accountable and Trustworthy
• Ability to understand software requirements based on a wireframe/program specification
• Familiarity with GoLang / PHP / Python / Java / C / C++ / Linux Shell and Scripting / HTML / CSS / JS / Node.js is a plus
• Effective communication skills to ensure smooth coordination of tasks with Team Leader
• Knowledge of MongoDB, MySQL, and PL/SQL is a plus
• Familiarity with ML, TensorFlow, and Keras is a plus
• Knowledge of web servers such as Apache, NGNIX, and the HTTP protocol is plus
• Knowledge of multi-process, threads, memory, and filesystem on Linux is desirable

Title: Full Stack Developer

Skills/Roles hiring for: Node.Js, MongoDB, ExpressJs, Angular 6 (MEAN Stack), Web APIs.  We are looking for a full stack JavaScript developer to join an award-winning

Blockchain startup having PSU & Banks as clients.

Candidate must have

• Strong Javascript front-end/back-end development experience of 1 year
• In-depth working knowledge of Angular JS framework and
• Completed at least 1 project using
• Experience with HTML, JavaScript/AJAX/Jquery.
• Experience with open source tools & frameworks e. git etc.
• Familiarity with Web
• Experience with nodeJS RESTful
• Blockchain experience will be an added

Job Description:

• Testing and evaluating a new program
• Identifying areas for modification in existing programs and subsequently developing these modifications
• Writing and implementing efficient code
• Determining the operational practicality of software code
• Maintaining and upgrading an existing system
• User Training
• Make design and technical decisions for AngularJS
• Prepare documentation of written

The developer will report to the Technical Product Manager and must be willing to work in close coordination with other developers, product team, UX designers and business, and systems analysts.

• 2-5 years relevant work experience in building multiple users software solutions
• 1-2 years hands on experience building cloud based web and mobile applications
• JavaScript, React, NodeJS, structured and unstructured store
• Strong Front End or Back end experience
• Hands on experience building Restful APIs
• Hands on experience building microservices based applications
• Understanding of DevOps / DevSecOps processes and related tools including, but not limited to, IaC (Terraform, CloudFormation), config management (Chef, Puppet), Git / Bitbucket, or Jenkins, etc.
• Hands on experience with multiple frontend or backend technologies (either) / frameworks / platforms supporting web and mobile applications – Such as: NodeJS, Python, Django, Flask, PHP, Laravel, jQuery, Bootstrap, Angular, Vue.js, ReactJS, Bootstrap, React-Native, Flutter, iOS SDK, or similar.
• Hands-on end to end experience of multiple application development frameworks, monitoring tools, and deployment methodologies
• Experience building and deploying with container technologies such as Docker and Kubernetes and leveraging them throughout the CICD process
• Understanding of practices regarding system security measures

Senior Full Stack Engineer - TalkingYak

Talking Yak is an Android-based English teaching system made specifically for native Hindi and Tamil speakers.

Our program includes over 400 intelligently-structured videos, thousands of exercises, over 10,000 vocabulary words and phrases, and a system that adapts itself to each learner. In a matter of months, we can elevate most learners to a 100% functional English capability.

We are one team at TalkingYak consisting of honest, moral & ethical individuals who are heard and valued! We hold ourselves accountable- delivering on expectations & celebrating each other for the great work we do!

We’re looking for a senior developer who has a lot of passion towards solving real world problems using technology. 

Below are some of the developer qualities we like a lot,

• Good team player
• Ability to write clean readable code
• Good logical and problem solving skills
• Clear communication skills
• Never give up attitude
• Passionate to learn and acquire new skills

Our current technology stack includes Android, Python, Flask, MongoDB, RabbitMQ, ElasticSearch and AWS. While it is a bonus to have worked on the same set of above listed technologies, it is not a must until you have hands-on experience with similar technologies.

To give you an idea about what you will be working on after joining us, you will be

• Dockerizing different services and automating our AWS infrastructure provisioning steps
• Optimising our backend services to scale for a few hundreds of concurrent users
• Managing our backed service and adding new features to it
• Working on refactoring our current android codebase to a cleaner design
• Mentoring junior developers

While we feel a developer with 4 to 8 years of hands-on experience will be more suitable for this role, it shouldn't be a hard constraint if you have the required skills.

We would love to get in touch immediately and have a conversation, if you feel our interests align.

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.

1. Strong proficiency with .Net Core API development
2. Experience with caching approaches for API
3. Hands on with SQL Server and its variation among popular databases
4. Well versed with stored procedures, query plans, altering the indexes, and troubleshooting the performance holdups
5. Skilled at performance optimization of .NET APIs
6. Experience & Knowledge on Open API specification & swagger documentation

1. Familiar with .NET design patterns
2. Performance tuning of SQL Stored Procedures