Sr. Backend Software Engineer(MERN Stack)

Job Description:

PHP Developer (candidates having experience with PHP, WordPress & WooCommerce should only apply and provide the details through the shared link)

Company: Wisetr Technology Pvt. Ltd. ("FunnelKit is one of the brands of Wisetr Technology Pvt. Ltd.") 

Website: www(dot)funnelkit(dot)com

Location: Delhi, Tilak Nagar (work from office/ on-site only)

Experience: 5+ years + AI mindset

Education: Engineering candidates should only apply with relevant experience with WordPress and WooCommerce plugin/ product development (not theme customization)

Working Days: 5 days - Monday – Friday

About FunnelKit

FunnelKit builds powerful no-code funnel and marketing automation products for WooCommerce businesses worldwide. Our mission is to help small businesses grow profitably by giving them the right tools to increase conversions and revenue—without unnecessary complexity.

We are a product-first, customer-driven team that values ownership, simplicity, kindness, and excellence.

Role Overview

This role is ideal for someone who:

• Can lead development of our WordPress & WooCommerce product suite as a senior engineer who thinks beyond code
• Enjoys solving real customer problems
• Has worked on production-level WordPress plugins or SaaS products
• Takes ownership of both development and troubleshooting

You'll drive architectural decisions, mentor team members, and shape products that impact thousands of businesses. We're looking for someone who combines deep technical expertise with product thinking—understanding not just how to build features, but why they matter to customers.

You will work closely with Development, Product, QA, and Customer Success teams to build, improve, and support FunnelKit’s core products.

Key Responsibilities

1. Plugin Development & Product Feature Development

• Build and maintain WordPress plugins to extend site functionality and improve user experience
• Own architecture decisions for complex features across multiple products
• Work with the Product team to convert requirements into high-quality code
• Build custom solutions based on real customer use cases
• Ensure all features are properly tested and documented before release
• Mentor mid-level and junior developers through code reviews and pairing
• Lead initiatives that improve developer productivity and code quality
• Think creatively about technical challenges—finding innovative solutions
• Drive technical standards and best practices for the team

2. WooCommerce Integration & WordPress Hooks

• Develop custom solutions and features specifically for WooCommerce stores using WordPress hooks.
• Utilize deep knowledge of WordPress hooks (actions & filters) to extend core functionality and integrate with other plugins. 

3. Troubleshooting & Release Stability

• Monitor product behavior after updates and releases
• Debug complex cross-system issues and performance bottlenecks
• Ensure smooth upgrades and backward compatibility
• Perform root-cause analysis to prevent repeat issues
• Resolve issues related to plugin conflicts, performance, and compatibility with WordPress and WooCommerce.

4. Product Improvement & Analysis

• Design scalable solutions that work across our product ecosystem
• Analyze L2 support tickets to identify patterns and gaps
• Collaborate with Product and Engineering teams to implement improvements and evaluate technical feasibility and trade-offs

5. Git & Code Management

• Manage code using Git (commits, merges, releases)
• Maintain clean, scalable, and secure codebases
• Follow WordPress and WooCommerce best practices
• Conduct regular code reviews

6. AI-Assisted Development

• Use Cursor AI for code assistance, security checks, and snippet creation
• Improve development speed while maintaining high code quality
• Work closely with the development team to ensure smooth integration of plugins with existing systems
• Document technical decisions and create knowledge-sharing resources

7. QA & Test Case Collaboration

• Create clear use cases for QA testing
• Work closely with QA to ensure all features and fixes are thoroughly tested
• Reduce post-release bugs through strong pre-release validation

8. Internal Support to Customer Success

• Assist Customer Success Engineers with technical guidance
• Help resolve complex L1 issues when required
• Ensure recurring problems are documented and addressed at the product level
• Handle and resolve L2 support tickets for FunnelKit Checkout, Cart, and Bump
• Debug complex WordPress, WooCommerce, and plugin-related issues
• Provide fast, stable, and scalable solutions
• Identify recurring issues and propose long-term product improvements
• Coordinate closely with Customer Success Engineers

9. CSS & Template Development

• Develop and maintain CSS and templates for FunnelKit products
• Ensure responsive, cross-browser compatible designs
• Maintain high UI and performance standards

Required Skills & Experience

• 5+ years of hands-on WordPress development
• Strong experience with:
• WordPress Core & Plugin Development
• WooCommerce internals and its ecosystem (APIs & customizations)
• WordPress hooks (actions, filters, and custom hooks)
• PHP mastery (expert-level OOP, design patterns and SOLID principles)
• Database proficiency - Advanced MySQL skills, query optimization, custom table design
• JavaScript, HTML, CSS
• Strong debugging and troubleshooting skills to resolve plugin related issues
• Security First - Expert in preventing SQL injection, XSS, CSRF; capability checks and input validation
• Experience working on product-based WordPress plugins or SaaS
• Strong understanding of orders, checkout flows, and extensibility points
• Proficient with Git version control and collaboration
• Performance Mindset: Experience optimizing slow queries, managing memory, and profiling
• Technical Leadership: Code review experience, mentoring ability, architecture decision-making
• Communication: Explains complex technical concepts clearly to different audiences
• Ability to work on-site from our Delhi office

Nice-to-Have Skills

• Payment gateway integration and debugging experience
• Background processing and job scheduling (Action Scheduler or similar)
• REST API design and development
• Multi-currency or internationalization experience
• Subscription/recurring billing systems knowledge
• Contributing to or maintaining open-source projects
• Experience building WooCommerce extensions
• Experience with checkout, cart, or conversion-focused products
• Familiarity with performance optimization and security best practices
• Experience using AI tools for development
• Candidates with hands-on experience in Agentic AI systems and working with Claude Code will be given preference.

Why This Role is Exciting

• Product Impact: Build features that directly impact revenue for thousands of businesses
• Cross-Product Thinking: Work across an ecosystem of products, not siloed features
• Innovation Encouraged: Find creative solutions to hard problems—we value ingenuity
• Real Leadership: Influence technical direction without organizational bureaucracy
• Modern Engineering: AI-enhanced workflows, continuous improvement, quality-first culture
• WordPress at Scale: Solve interesting challenges in one of the world's largest tech ecosystems

What Success Looks Like

First 3 Months:

• Lead your first major feature from design to deployment
• Establish yourself as a reliable code reviewer
• Identify and fix a significant performance or architectural issue

First 6 Months:

• Own a product area and drive its technical direction
• Mentor team members with measurable improvement in their skills
• Ship an innovative solution that becomes a best practice

First Year:

• Drive cross-product improvements that benefit the entire ecosystem
• Be the technical leader others consult for complex decisions
• Contribute to hiring and growing the engineering team

What We Value

• Product-minded engineering: Understanding business impact, not just technical elegance
• Ownership mentality: Taking responsibility for outcomes, not just tasks
• Continuous improvement: Always learning, always getting better
• Knowledge sharing: Writing docs, mentoring others, building team capability
• Creative problem-solving: Seeing opportunities others miss, finding better ways

What We Offer

• Opportunity to work on globally used WordPress products
• Competitive senior-level compensation
• High-ownership, low-bureaucracy environment
• Collaborative, product-driven culture
• Competitive salary based on experience
• Long-term growth and learning opportunities
• Technical leadership growth opportunities

How to Apply

• Links to significant projects you've led (GitHub, WordPress.org, portfolio)
• Brief note on a technical challenge you solved creatively

NOTE: This is a full-time, on-site position based in Delhi. Remote or hybrid candidates will not be considered.

FunnelKit is committed to creating an inclusive environment and is an equal opportunity employer. We celebrate diversity and welcome applications from candidates of all backgrounds.

Job Types: Full-time, Permanent

Benefits:

• Health insurance
• Paid sick time
• Provident Fund
• Paid time off

Ability to commute/relocate:

• Tilak Nagar, Delhi, Delhi: Reliably commute or planning to relocate before starting work (Required)

Application Question(s):

• Experience with Core PHP, WordPress & WooCommerce is a must.

Work Location: In person

Job Title: Lead Backend Web App Developer

Experience: 10–15 Years

Location: Bengaluru (Hybrid)

Role Overview:

We are seeking an experienced Lead Backend Web App Developer to design and maintain scalable, cloud-based backend systems. This role demands expertise in microservices, AWS, and backend technologies to deliver efficient and high-performing applications.

Key Responsibilities:

• Build and maintain scalable backend systems for cloud-based web applications.
• Develop microservices using AWS (Lambda, SQS, SNS) and databases (MySQL, NoSQL).
• Design and implement REST APIs for seamless communication between systems.
• Create containerized solutions with Docker for efficient deployment.
• Solve real-world problems with enterprise-class product designs.
• Contribute to key decisions on product and technology direction.
• Promote frameworks, standards, and new technologies within the team.

Required Skills:

• Experience: 10+ Years in Backend Development; 3+ Years in large-scale, microservices-based projects.
• Backend Technologies: Proficiency in Python, Node.js, and Java.
• Cloud Expertise: Strong experience with AWS services (Lambda, SQS, SNS).
• Database Skills: Expertise in MySQL and NoSQL databases.
• Microservices Architecture: Deep understanding of distributed systems and scalability.
• DevOps Tools: Hands-on experience with Docker.
• API Development: Proven expertise in designing and consuming REST APIs.
• Soft Skills: Excellent problem-solving and communication abilities.

Why Join Us?

• Work on impactful projects with real-world applications.
• Solve complex problems in a dynamic, fast-paced environment.
• Collaborate with a team of skilled professionals.

Instrive is a Chennai-based start-up that provides high-quality Dev-ops solutions for clients worldwide. We strive to solve problems and create value in this increasingly digital world. Instrive was founded to create high-quality products and deliver great user experiences worldwide.

Several products are being developed for both in-house purposes and our overseas clients, and we are actively expanding our team of talented professionals.

We are constantly pushing the boundaries of what is possible, and our employees have the opportunity to be at the forefront of this innovation. Our flat organisational structure encourages open communication and idea-sharing and provides ample opportunities for employees to take ownership of their work and make a real impact.

As part of our ambitious product roadmap, we need senior developers with experience in NodeJS.

Your primary responsibility will be to develop UI components, processes, documentation, and an organisation-wide style guide that can be reused across all applications.

Roles and Responsibilities:

• Develop and maintain web applications using Node.js, Express, and related technologies
• Write clean, efficient, and well-documented code.
• Collaborate with the team to design and implement new features and functionality
• Troubleshoot and debug issues to ensure a smooth user experience
• Optimize application performance and scalability
• Participate in code reviews and ensure adherence to coding standards
• Keep up-to-date with the latest technologies and industry trends
• Work with other developers, project managers, and stakeholders to understand project requirements and deliver high-quality solutions

Desired Candidate Profile:

• 3-5 years of experience in web application development using Node.js
• Strong proficiency in JavaScript, including experience with popular libraries and frameworks such as Express.js, Nest.js, and Mongoose
• Experience with front-end technologies such as HTML, CSS, and JavaScript
• Knowledge of web protocols and technologies such as HTTP, REST, and WebSockets
• Experience with NoSQL databases such as MongoDB and SQL databases like MySQL, SQLite, PostgreSQL
• Experience with Git and version control
• Familiarity with Agile development methodologies
• Strong problem-solving and analytical skills
• Excellent communication skills, both verbal and written
• Adaptability to rapid change

Good to have:

• Experience with GraphQL and Apollo
• Familiarity with AWS, Azure, or Google Cloud Platform
• Experience with containerisation technologies such as Docker and Kubernetes
• Experience with unit testing, integration testing, and end-to-end testing frameworks
• Knowledge of microservices architecture and event-driven architecture
• Familiarity with cloud-based development tools such as AWS Lambda and Azure Functions
• Familiarity with load balancing, caching, and performance optimisation techniques
• Experience working with remote teams and communicating effectively with remote stakeholders.

Perks and Benefits:

By working at the intersection of product, strategy, and technology, you will learn how to make strategic decisions, prioritise product features against business objectives, and put the user first.

In addition to the exciting work, Instrive offers our employees a comprehensive benefits package. This includes health insurance, paid time off, and professional development and training opportunities, so our employees can continue to grow and advance in their careers. 

We focus on fostering a positive and collaborative work environment and are committed to helping our employees reach their full potential.

You will make a meaningful impact and create lasting connections with our outstanding team, no matter where your career takes you.

Job Title: Senior Backend Developer

Location: Mali mahajan road, somwar peth, Pune.

Experience: 5-7 years

Responsibilities:

Backend Development:

• Design, develop, and maintain scalable and high-performance backend systems.

1. Utilize AWS Serverless skills (API Gateway, Lambda, DynamoDB, SQS, Event bridge, CloudWatch, permissions, accounts, multi accounts, streams

Technology Stack:

• Proficiency in JavaScript, Node.js, and Typescript for backend development.
• Leverage AWS services to build serverless applications with a focus on efficiency, security, and reliability.

E-commerce Expertise:

• Bring experience in e-commerce projects, with additional consideration for knowledge of Commerce tools.

Communication Skills:

• Communicate effectively with stakeholders across the US, UK, and Australia.
• Collaborate with cross-functional teams to understand requirements and provide technical insights.

Project Collaboration:

• Work closely with front-end developers, QA engineers, and other team members to deliver end-to-end solutions.

Requirements:

1. Bachelor’s degree in Computer Science or a related field.
2. 5-7 years of backend development experience.
3. Strong proficiency in AWS Serverless technologies.
4. Expertise in JavaScript, Node.js, and Typescript.
5. Experience with e-commerce projects, particularly Commercetools, is an advantage.
6. Excellent communication skills to engage with international stakeholders.

• Designing, coding, and debugging software using J2EE, Spring boot,Microservices ,AWS .
• Work closely with Solution architects to understand the architecture
  design and implement software designs accordingly.
• Improving the performance of existing software.
• Providing training to other engineers and code review.
• Maintaining and upgrading existing software.
• Recommending new technologies that can help increase productivity.
• Supervising and overseeing the technical aspects of projects.
• Investigating software-related complaints and making necessary adjustments to ensure optimal software performance.
• Regularly attending team meetings to discuss projects, brainstorm ideas, and put forward solutions to any issues.
• Mentioning Software engineers on correct coding practices.