Principal Engineer - Full Stack

About HighLevel

HighLevel is an AI powered, all-in-one white-label sales & marketing platform that empowers agencies, entrepreneurs, and businesses to elevate their digital presence and drive growth. We are proud to support a global and growing community of over 2 million businesses, comprised of agencies, consultants, and businesses of all sizes and industries. HighLevel empowers users with all the tools needed to capture, nurture, and close new leads into repeat customers. As of mid 2025, HighLevel processes over 4 billion API hits and handles more than 2.5 billion message events every day. Our platform manages over 470 terabytes of data distributed across five databases, operates with a network of over 250 microservices, and supports over 1 million hostnames.

Our People

With over 1,500 team members across 15+ countries, we operate in a global, remote-first environment. We are building more than software; we are building a global community rooted in creativity, collaboration, and impact. We take pride in cultivating a culture where innovation thrives, ideas are celebrated, and people come first, no matter where they call home.

Our Impact

As of mid 2025, our platform powers over 1.5 billion messages, helps generate over 200 million leads, and facilitates over 20 million conversations for the more than 2 million businesses we serve each month. Behind those numbers are real people growing their companies, connecting with customers, and making their mark - and we get to help make that happen. Learn more about us on our YouTube Channel or Blog Posts

About the Role

We’re looking for a Senior Software Engineer to join our Agency Module and Billing Team, which powers the foundation of our Agency Ecosystem — enabling seamless onboarding, management, and monetisation experiences for HighLevel’s agencies and their clients.

Today, over 100K agencies run their businesses with HighLevel, collectively serving 2M+ businesses of all scales — primarily SMBs. The Company Module and Agency Billing systems are at the heart of this growth, helping agencies onboard faster, manage finances effortlessly, and scale their operations with reliability and transparency.

This team builds and scales key components like Agency Signup, Agency Billing, and the HighLevel Affiliate Program, all integrated into our whitelabeled platform that empowers businesses to deliver customised experiences under their own brand. These systems are critical to the growth and sustainability of HighLevel’s ecosystem — supporting thousands of agencies and their downstream customers with robust, scalable, and secure infrastructure.

As a Senior Software Engineer, you’ll play a pivotal role in designing and evolving these core systems. You’ll work on challenges across frontend and backend architecture, distributed systems, payment integrations, and multi-tenant SaaS design — ensuring reliability, scalability, and a seamless experience for agencies across web and mobile platforms.

You’ll collaborate closely with Product Managers, Designers, and other Engineers to deliver powerful and intuitive solutions that help agencies scale faster and manage their businesses effortlessly.

Responsibilities

• Own and contribute to architecture and development across Agency Module, Billing, and Affiliate systems, driving technical excellence across frontend and backend services.
• Design and implement robust backend APIs for subscription management, payments, invoicing, and affiliate tracking, using test-driven development and scalable distributed patterns (caching, messaging, queuing).
• Deliver performant frontend experiences for agency onboarding, billing dashboards, and affiliate management using modern frameworks and component-driven architecture with strong state management principles.
• Architect secure integrations with third-party payment gateways (e.g., Stripe, Razorpay, PayPal, etc.) and internal microservices, ensuring accuracy, reliability, and compliance in all financial transactions.
• Implement and maintain observability, logging, and monitoring to ensure high availability and rapid incident resolution across critical billing and agency workflows.
• Champion platform security and compliance by enforcing best practices across authentication, authorization, data protection, and rate-limiting — ensuring the integrity of sensitive financial and user data.
• Leverage LLMs and AI-assisted tools to accelerate development, automate testing, refactoring, and documentation, while maintaining strong reliability guardrails.
• Collaborate cross-functionally with Product Managers, Designers, and other Engineering teams to ensure alignment between business goals and technical architecture.
• Participate in technical reviews, deep dives, and on-call rotations, fostering a culture of accountability, operational excellence, and continuous improvement.

Requirements

• 4+ years of hands-on software engineering experience building and scaling robust backend systems and high-performance frontend applications.
• Strong backend engineering and distributed system design skills, with hands-on experience in API development, data modeling, and systems architecture using either Node.js, GoLang or Java.
• It is preferred if the candidate has experience in TypeScript, PostgreSQL, MongoDB, and Redis as well.
• Expertise in backend performance optimization, caching strategies, and event-driven architectures (e.g., Redis, Kafka, Pub/Sub).
• Familiar with modern frontend frameworks (React, Vue, Angular), advanced UI engineering patterns, and CSS libraries like Bootstrap or Tailwind CSS.
• Advanced experience with complex state management libraries (e.g., Redux, Vuex, MobX) and architectural design of large-scale application state.
• Proven track record of optimizing frontend performance and web vitals at scale, including experience with server-side rendering (SSR), edge, or hybrid rendering architectures.
• Familiarity with frontend and backend observability - including monitoring, tracing, error tracking, and performance profiling in production (e.g., Grafana, Prometheus, Sentry, PostHog).
• Strong understanding of security best practices across the full stack—including authentication, authorization, access control, secure data flow, and privacy compliance.
• Excellent communication and cross-functional collaboration skills, able to drive complex initiatives, lead technical discussions, and mentor junior engineers.

EEO Statement:

At HighLevel, we value diversity. In fact, we understand it makes our organisation stronger. We are committed to inclusive hiring/promotion practices that evaluate skill sets, abilities, and qualifications without regard to any characteristic unrelated to performing the job at the highest level. Our objective is to foster an environment where really talented employees from all walks of life can be their true and whole selves, cherished and welcomed for their differences while providing excellent service to our clients and learning from one another along the way! Reasonable accommodations may be made to enable individuals with disabilities to perform essential functions.

As a Software Developer at Prodios Labs, you will have the opportunity to work on cutting-edge projects utilizing your expertise in JavaScript, Node.js, ReactJS, CSS, HTML, TypeScript, and MongoDB. Your role will be crucial in developing innovative software solutions that will drive the success of our company.

Key Responsibilities:

1. Collaborate with cross-functional teams to design, develop, and implement software solutions that meet the needs of our clients.

2. Write clean, maintainable, and efficient code using best practices in software development.

3. Implement responsive design principles to create user-friendly interfaces and enhance user experience.

4. Troubleshoot and debug applications to ensure optimal performance and reliability.

5. Stay updated on emerging technologies and trends in the software development industry to continuously improve our products.

6. Conduct thorough testing and quality assurance to ensure the functionality and security of our software solutions.

7. Communicate effectively with team members and stakeholders to ensure project deadlines are met and goals are achieved.

If you are a passionate and skilled Software Developer looking to make a significant impact in a dynamic and fast-paced environment, we want to hear from you! Join our team at Prodios Labs and be a part of our exciting journey towards innovation and success

• A​ ​hands-on full-stack engineer​​ to join the ​​core team​​ with experience in building products from scratch into large-scale platforms and ​solving business problems leveraging new and innovative technology
• Leverage the DevOps team to ensure the product can be built, deployed, and tested across all of the release cycles from dev to production 
• Strong grasp of modern security principles and how to apply them to applications
• Work with stakeholders (product owners, project managers, and scrum masters) to define and clarify requirements.
• Hands-on development with both front-end, middle-tier, and back-end programming
• Adhere to agile development methodologies
• Experience in Node.js, Javascript and Javascript libraries, NOSQL databases, Python etc

Hurry Upp!!! We are Hiring Full Stack Developer

We are looking for a highly skilled computer programmer who is comfortable with both front and back-end programming. Full Stack Developers are responsible for developing and designing front-end web architecture, ensuring the responsiveness of applications, and working alongside graphic designers for web design features, among other duties.

Full Stack Developers will be required to see out a project from conception to final product, requiring good organizational skills and attention to detail.

Full Stack Developer 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.

Role: FullStack Developer

Experience: 1+ years

Location: Madurai

Mode: Work from office

We have vast experience in delivering high-quality products with significant output on time. We are specialized in creating web and mobile applications with the latest technology. We are expert in developing a perfect solution for rental marketplace services and on-demand businesses done by our proficient team of experts with strong experience in development.

• Minimum of 6 months of real-time experience in React/Node.js/Angular
• Good understanding of structured and unstructured databases (MySQL and MongoDB)
• Knowledge of isomorphic React is an added advantage
• Experience in implementing well-known React workflows such as Redux
• Ability to learn new technologies and languages quickly
• Proficient understanding of code versioning tools, such as Git
• Experience with Javascript backend framework like Express.js
• Good time-management skills
• Experience with Restful API services
• Delivering a complete front end application
• Professional, precise communication skills
• Deep knowledge of Angular/Node.js/React practices and commonly used modules based on extensive work experience
• Good knowledge in Javascript and able to handle Array & Objects built-in methods
• A Good logical thinking and problem-solving skills
• A good team player

We are looking to hire a Full-stack web developer who will be responsible for the creation and enhancement of web applications according to the company's specifications. As the role takes into consideration user experience and function, a certain level of both functional domain experience and computer programming is necessary.

To be successful in this position, you will be required to demonstrate a detailed knowledge of the industry's best practices in software development, development expertise in back-end technologies, and must have a professional track record of effective technical management, information analysis, and experience in latest web technologies.

You should have in-depth knowledge of object-oriented PHP programming, an understanding of MVC designs, and working knowledge of front-end technologies including HTML 5, JavaScript, and CSS3.

Responsibilities

13.Guide team members for design and implementation of tasks
14. Coordinate end-to-end implementation.

Requirements-

• 1 to 3 years of professional experience working with PHP, web frameworks including Laravel, CodeIgniter- Preferred.
• 1 to 3 years of professional software development experience-Preferred
• Meaningful experience working on large, complex system integrations
• Knowledge of front-end technologies including CSS3, JavaScript, and HTML5.
• Previous experience creating scalable applications.
• Proficient with code versioning tools including Git, Mercurial, CVS, and SVN.
• Familiarity with SQL/NoSQL databases.
• Ability to manage projects.
• Good problem-solving skills
• Ability to take extreme ownership over your and teams work

Job Description: Full Stack Developer – RattanIndia Technologies Private Limited

Based at: New Delhi

Overview:

Required Full Stack developer with 3 to 6 years of experience with competencies in development of web applications in financial services domain on salesforce development platform and shall be responsible for requirement analysis, design, coding, testing and implementation of web applications.

Key Accountabilities:

• Working closely with business teams on the analysis to understand the requirements.
• Shall be responsible for designing, coding, testing and implementation of web application.
• Will be responsible for system design and application development of web applications.
• Work closely with the product managers and other team members to build features, functionality, and application.
• Design and implementation of low-latency, high-availability, and high performance applications.
• Implementation of security and data protection.
• Demonstrate creativity and sound analytical skills in identifying effective approaches to develop solutions independently.
• Deliver features with high quality, on-time as per project plans and delivery commitments.
• Delivering status updates to the management and stakeholders regularly.
• Demonstrate creativity and sound analytical skills in identifying effective approaches to develop solutions independently.

Academic Qualification:

• Tech Computer Science/MCA from Top Tier Institutes.

Skillset Requirements:

• Expertise with Node.JS and associated technologies such as React and Express.
• Fluent in HTML5, CSS3, and JavaScript
• Experience with SQL (Postgres) data models
• Extensive experience developing and working with REST APIs.
• Experience working in a DevOps environment and using tools like Travis, Jenkins.
• Solid experience with containerization using Docker and Kubernetes.
• Proficiency with source control and team collaboration tools (GitHub, Asana, Jira, Slack)
• Experience with data interchange formats such as XML or JSON.
• Solid Experience with AWS, Heroku and Salesforce.

About RattanIndia ltd.

For Details visit: http://www.rattanindia.com">www.rattanindia.com

https://rattanindia.in/">https://rattanindia.in/

Roles and Responsibilities

• Strong proficiency in Java and building scalable enterprise applications
• Can think of architectural design at scale
• Love solving complex and challenging problems
• Have good knowledge of design and architectural patterns
• Thrive to implement Industry’s best practices and coding standards
• High obsession for Quality and Performance
• Good knowledge on performance optimization, SQL tuning, caching techniques
• Like to collaborate with people, share knowledge, learn from others and mentor juniors

Essential Duties & Responsibilities

● Design, build and maintain efficient, reusable, and reliable Ruby code
● Contribute to building an agile environment
● Test your code
● Engaged in all aspects of product development and will be working closely with product management, operations, client-engineering and customer success teams
● Working with an exceptional team to help scale a fast-paced business.
● Ability to work independently on challenging compound problems as well as collaborating with other team members to solve major goals
● Present complex ideas and approaches in simple communicable terms across engineering and management levels
● Identify bottlenecks and bugs, and devise solutions to these problems


Required Qualifications 

● Ruby on Rails (6+ years)
● PostgreSQL or MySQL
● JavaScript and AngularJS (or other client-side frameworks like Ember, Backbone, etc)
● Test-driven development with RSpec, Capybara, Jasmine
● Git, Continuous Integration, AWS, etc
● Bonus points for SaaS experience