Fullstack Developer (MERN stack remote job)

We're looking for an experienced Full-Stack Engineer who can architect and build AI-powered agent systems from the ground up. You'll work across the entire stack—from designing scalable backend services and LLM orchestration pipelines to creating frontend interfaces for agent interactions through widgets, bots, plugins, and browser extensions.

You should be fluent in modern backend technologies, AI/LLM integration patterns, and frontend development, with strong systems design thinking and the ability to navigate the complexities of building reliable AI applications.

Note: This is an on-site, 6-day-a-week role. We are in a critical product development phase where sthe peed of iteration directly determines market success. At this early stage, speed of execution and clarity of thought are our strongest moats, and we are doubling down on both as we build through our 0→1 journey.

WHAT YOU BRING:

You take ownership of complex technical challenges end to end, from system architecture to deployment, and thrive in a lean team where every person is a builder. You maintain a strong bias for action, moving quickly to prototype and validate AI agent capabilities while building production-grade systems. You consistently deliver reliable, scalable solutions that leverage AI effectively — whether it's designing robust prompt chains, implementing RAG systems, building conversational interfaces, or creating seamless browser extensions.

You earn trust through technical depth, reliable execution, and the ability to bridge AI capabilities with practical business needs. Above all, you are obsessed with building intelligent systems that actually work. You think deeply about system reliability, performance, cost optimization, and you're motivated by creating AI experiences that deliver real value to our enterprise customers.

WHAT YOU WILL DO:

Your primary responsibility (95% of your time) will be designing and building AI agent systems across the full stack. Specifically, you will:

• Architect and implement scalable backend services for AI agent orchestration, including LLM integration, prompt management, context handling, and conversation state management.
• Design and build robust AI pipelines — implementing RAG systems, agent workflows, tool calling, and chain-of-thought reasoning patterns.
• Develop frontend interfaces for AI interactions including embeddable widgets, Chrome extensions, chat interfaces, and integration plugins for third-party platforms.
• Optimize LLM operations — managing token usage, implementing caching strategies, handling rate limits, and building evaluation frameworks for agent performance.
• Build observability and monitoring systems for AI agents, including prompt versioning, conversation analytics, and quality assurance pipelines.
• Collaborate on system design decisions around AI infrastructure, model selection, vector databases, and real-time agent capabilities.
• Stay current with AI/LLM developments and pragmatically adopt new techniques (function calling, multi-agent systems, advanced prompting strategies) where they add value.

BASIC QUALIFICATIONS:

• 4–6 years of full-stack development experience, with at least 1 year working with LLMs and AI systems.
• Strong backend engineering skills: proficiency in Node.js, Python, or similar; experience with API design, database systems, and distributed architectures.
• Hands-on AI/LLM experience: prompt engineering, working with OpenAI/Anthropic/Google APIs, implementing RAG, managing context windows, and optimizing for latency/cost.
• Frontend development capabilities: JavaScript/TypeScript, React or Vue, browser extension development, and building embeddable widgets.
• Systems design thinking: ability to architect scalable, fault-tolerant systems that handle the unique challenges of AI applications (non-determinism, latency, cost).
• Experience with AI operations: prompt versioning, A/B testing for prompts, monitoring agent behavior, and implementing guardrails.
• Understanding of vector databases, embedding models, and semantic search implementations.
• Comfortable working in fast-moving, startup-style environments with high ownership.

PREFERRED QUALIFICATIONS:

• Experience with advanced LLM techniques: fine-tuning, function calling, agent frameworks (LangChain, LlamaIndex, AutoGPT patterns).
• Familiarity with ML ops tools and practices for production AI systems.
• Prior work on conversational AI, chatbots, or virtual assistants at scale.
• Experience with real-time systems, WebSockets, and streaming responses.
• Knowledge of browser automation, web scraping, or RPA technologies.
• Experience with multi-tenant SaaS architectures and enterprise security requirements.
• Contributions to open-source AI/LLM projects or published work in the field.

WHAT WE OFFER:

• Competitive salary + meaningful equity.
• High ownership and the opportunity to shape product direction.
• Direct impact on cutting-edge AI product development.
• A collaborative team that values clarity, autonomy, and velocity.

Position Title: Lead Software Engineer

Level: Mid - Senior L5

Years: 6-8 Yrs

Job Location: Delhi/NCR (Hybrid)

Position: 1

About Omni.US

Omni is the ultimate B2B outreach platform backed by the decade-long expertise of co-founders in cold outreach and scaling SaaS companies. We've obsessively focused on cold outreach and built a powerful tool perfect for Enterprise and SMB companies to get clients.  Our team has deep experience building and scaling B2B SaaS companies to millions in ARR. We understand what it takes to create a successful product, so we're excited about Omni.  

Meet your Team Members

Alex Berman, Co-Founder

Navjyotsingh Rajput, Co-Founder

Madhuri Pandit, Product Owner

About the Role

As a Lead Engineer, you will need to produce and implement functional software solutions. You will work with a senior engineer to define software requirements and take the lead on operational and technical projects. In this role, you should be able to work with minimal supervision.  Your goal will be to develop high-quality software that is aligned with customer needs and business goals.

Responsibilities

• You will need to ensure that software deliverables comply with quality standards and are completed on time.
• Experience or proactive working in mission-critical 24*7 systems.
• Review the performance of the operating system used in the Company and upgrade it as and when required. 
• Conducts peer code reviews and design reviews. 
• Should have knowledge and experience working with SAAS-based applications in early or mid-stage startups. 
• Undertaking engineering tasks that are complex in nature and also working on big modules and defining the architectural layouts, both on the Application, API, and Database levels. 
• Demonstrates broad and deep expertise in multiple computer languages and frameworks (e.g., open-source).
• Designs, Develop and approve end-to-end functionality of a product line, platform, or infrastructure.
• 3+ Years of experience as Technical Lead. 
• 6+ years of software development experience with at least one full-cycle implementation.
• Strong exposure working on projects related to MERN stack. Maintains deep technical knowledge within areas of expertise
• Experience in building highly scalable distributed systems

Desired Experience

Technical Skills: 

• Programming and working with mobile or website systems & security principles. 
• Strong experience in Tech Stack - MERN (Node.JS, Express, React.JS, Mongodb) with GraphQl as preferred API. 
• Experience working in Product lifecycle management from requirement gatherings to user experience. 
• Strong experience in JS libraries. 
• Must have delivered at least 1 product (which should be available in the public domain for reference)

Soft Skills: 

• Creating end goals for their team.
• Experience in a delegation of responsibilities. 
• Can multitask and Should have experience managing/working with a team of 5- 10 resources.
• Offering support and guidance to the team when needed, able to provide clear instructions and set expectations.
• Prior experience working with Startups and Senior developers or Tech leads. 

Interview Process

• 1st Round - Technical 
• 2nd Round - Product Manager 
• 3rd Round - Manager 
• 3rd Round - HR Manager

Qualifications

• BE/BTech/MCA/ME/MTech-E&C/IT/CS or equivalent experience.

Title : Java Fullstack Developer

Job Location: Hyderabad, Chennai, Vizag, Bangalore, Pune (100% Remote)

Responsibilities

• Strong hands-on experience with Java development.
• Designs, codes, tests, debug, and documents software, and enhance existing components to ensure that software meets business needs.
• Deploy and maintain Applications/Systems.
• Work with other software engineers for one or more Agile scrum teams assigned to work on the project.
• Contribute to the design and architecture to enable secure, scalable, and maintainable software and should be able to clearly articulate the implications of design/architectural decisions,
• issues and plans to technology leadership.
• Develop reusable patterns and encourage innovation that will enhance team velocity.
• Collaborate on the design with other team members and product owners, both inside and outside the scrum team.
• Estimate engineering work effort for engineering team and effectively identify and prioritize the high impact tasks.
• Conduct design and code reviews to ensure code developed meets coding best practices guidelines, unit testing, security, and scalability and maintainability guidelines.
• Drive a quality mindset within the team.

Skills & Qualifications Required:

• Bachelor's degree in computer science or information technology
• Minimum 4 Years of experience as Java Development
• Experience with Spring Boot
• Experience with Micro services
• Experience with Angular
• Experience with Rest API
• Must have the ability to learn the concepts of a Software Development Life Cycle.
• Understands the process of new application development and has the ability to apply these concepts with minimal mentoring and supervision.
• Must have the ability to learn to provide support & maintenance for simple to complex software applications.
• Communicates well with working teams. Motivated and willing to take initiative. Capable of working well in a team and collaborative environment.
• Adaptable to change.

Responsibilities 

• Adding more features to our existing website which can ease the campaign launching process for campaigners. 
• Incorporating various tools which can track the users behavior and other key metrics. 
• Build APIs which are scalable and can help strategically partnering with other companies or organizations. 
• Adopting and incorporating changes as per the new technologies. 
• Investigate production issues pertaining to customer features to determine root cause and implement solutions 
• Work with the real-time feedback from our users (external and internal) to make the products better. 
• Take ownership of the backend services, ensure the best possible performance.
• Strong problem-solving skills, organizational and communication skills, team player

Requirements 

• Preferably 1+ year of experience in full stack development. 
• Hands on experience in front-end languages preferably html5, CSS3, React Js. 
• Top-notch programming skills in JavaScript and a strong understanding of web fundamentals 
• Experience in backend languages preferably NodeJs
• Familiar with MySQL/SQL server 
• Familiar with JavaScript technologies 
• Familiar with cloud services like AWS, Git 
• Knowledge/experience in building Web APIs 
• Good understanding of the foundations of security and best practices ∙ Good Problem-solving skills. 

What you'll get: 

Work with technologies like React, ReactJS, NodeJs.

Gain knowledge on full application lifecycle 

Faster growth and opportunities

• Extensive experience in building REST APIs
• Experience in building, managing, and enhancing backend / server-side development using java / java scripts. Expertise in NodeJS is preferred
• The person must have built systems that consume and process volumes of data from various sources. Experience in handling and managing data in NoSQL databases such as Mongodb.
• Extensive experience of building custom UI for web using the popular frameworks like angular and react. Experience in developing mobile UI is nice to have
• Experience of working with code repositories such as Github and GitLab.
• Fluent written and spoken English.
• Experience of working on Cloud environments and experience in AWS is preferred.
• Experience in Dockers and Kubernetes for deployments

• Design and documentation of the CashLobe technology stack
• Code / implement the CashLobe technology stack
• Deploy and maintain the CashLobe technology stack
• Engage with leadership team to help evolve the CashLobe technology stack offerings

• Have pre-built deployment pipelines CI/CD across environments DEV/STAGING/PROD
• Knowledge of developing using Python and specifically the data/number crunching frameworks like NumPy, pandas, scikit, etc.
• Experience in the Fintech domain and specifically the banking & accounting systems