PHP Developer

About us

CallHub provides cloud based communication software for nonprofits, political parties, advocacy organizations and businesses. We have delivered over 200 millions messages and calls for thousands of customers. We help political candidates during their campaigns in getting their message across to their voters, conduct surveys, manage event/town-hall invites and with recruiting volunteers for election campaigns. We are profitable with 8000+ paying customers from North America, Australia and Europe. Our customers include Uber, the Democratic Party, major political parties in the US, Canada, UK, France and Australia. 

About the Role

As a Senior/Lead Software Engineer at CallHub, you will play a critical role in leading the development and enhancement of our cloud-based communication and telephony platform (SaaS). You will be responsible for designing, building, and optimizing scalable, high-performance backend systems that support the rapid growth of our global user base, ensuring reliability, security, and customer satisfaction at every step. In this role, you will collaborate with cross-functional teams of highly skilled software engineers, operations engineers, and product managers to drive innovation and create products that delight customers by exceeding their expectations. You will lead technical decision-making, mentor engineers, and be responsible for building robust systems that are always available, while also contributing to the development of automation tools to streamline processes and improve efficiency. We are seeking experienced engineers with a deep understanding of software engineering principles, strong problem-solving skills, and a passion for leading teams to deliver impactful, customer-focused solutions. If you thrive in a fast-paced environment, love solving complex technical challenges, and are excited about mentoring and guiding the next generation of engineers, we’d love to hear from you!

Your Responsibilities

• Lead the design, development, and deployment of complex, scalable, reliable, and highly available features for world-class SaaS products and services.
• Guide the engineering team in adopting best practices for software development, code quality, and architecture.
• Make strategic architectural and technical decisions, ensuring the scalability, security, and performance of software applications.
• Proactively identify, prioritize, and address technical debt to improve system performance, maintainability, and long-term scalability, ensuring a solid foundation for future development.
• Collaborate with cross-functional teams (product managers, designers, and stakeholders) to define project scope, requirements, and timelines.
• Mentor and coach team members, providing technical guidance and fostering professional development.
• Oversee code reviews, ensuring adherence to best practices and maintaining high code quality standards.
• Drive continuous improvement in development processes, tools, and technologies to increase team productivity and product quality.
• Stay updated with the latest industry trends and emerging technologies to drive innovation and keep the team at the cutting edge.
• Ensure project timelines and goals are met, managing risks and resolving any technical challenges that arise during development.
• Foster a collaborative and inclusive team culture, promoting open communication and problem-solving.
• Imbibe and maintain a strong customer delight attitude while designing and building products.

What we’re looking for

• 7+ years of experience in software engineering, with a proven track record of leading engineering teams and mentoring junior developers.
• Strong expertise in designing and developing scalable backend systems, web services, and REST APIs using Python/Django or similar frameworks.
• Solid understanding of cloud-based architectures and microservices, with experience in deploying and maintaining SaaS applications.
• Solid experience in software engineering principles, including CI/CD pipelines, unit testing, code reviews, and version control (e.g., Git).
• Proficiency in working with databases like PostgreSQL, and experience in optimizing queries and ensuring high availability.
• Deep knowledge of computer science fundamentals, including data structures, algorithms, and software design principles.
• Experience with frontend technologies such as React, JavaScript, HTML, and CSS, and an understanding of how they integrate with backend services.
• Ability to quickly adapt to new technologies and make informed technical decisions in dynamic environments.
• Strong attention to detail, with the ability to empathize with customer needs and translate them into impactful software solutions.
• Excellent written and verbal communication skills, with the ability to clearly articulate technical concepts to both technical and non-technical stakeholders.
• Collaborative team player, willing to support and work closely with cross-functional teams.
• Bachelor’s or Master’s degree in Engineering or Computer Science from a reputable institution.

What you can look forward to

• Leadership and Ownership: Lead and oversee the entire software development lifecycle, from system design and development (backend and frontend) to QA and DevOps, with a focus on driving high-impact projects.
• Strategic Impact: Witness the direct impact of your work on our users and the overall success of the company, shaping products and solutions that make a significant difference.
• Innovative Technologies: Stay at the forefront of technology by working with the latest tools and frameworks, as we continuously innovate to deliver reliable and scalable solutions for our customers.
• Collaborative Culture: Engage in a culture of openness and collaboration, where your insights and leadership help drive the company’s success and delight our customers.

• 3+ years of Experience in software Design and development and familiar with technologies - Java, Java-J2EE, Spring Boot, Hibernate, Ajax, REST API, Micro services etc.
• Working knowledge of JVM internals
• Working knowledge of any database (MySQL or HSQLDB)
• Working knowledge of No-SQL database (Mongo or Dynamo DB)
• Working experience with messaging (JMS/RabbitMQ)
• R & D on new advanced cloud-based technologies in a test-driven agile development.
• Knowledge in designing and architecting systems with high scalability and performance requirements.
• Ability to understand infrastructure for performance evaluation and reporting of cloud-based services, namely AWS
• knowledge of key AWS services like EC2, S3, Lambda, CloudWatch etc.
• Certification on AWS Fundamendals
• Excellent communication skills
• ability to effectively articulate technical challenges and solutions
• skilled in interfacing with internal and external technical resources
• Good in debugging problems and mentoring teams on technical front

• Conducting analysis of website and application requirements.
• Writing back-end code and building efficient PHP modules.
• Developing back-end portals with an optimized database.
• Troubleshooting application and code issues.
• Integrating data storage solutions.
• Responding to integration requests from front-end developers.
• Finalizing back-end features and testing web applications.
• Updating and altering application features to enhance performance.

• Bachelor’s degree in computer science or a similar field.
• Knowledge of PHP web frameworks including Yii, Laravel, and CodeIgniter.
• Knowledge of front-end technologies including CSS3, JavaScript, and HTML5.
• Understanding of object-oriented PHP programming.
• Previous experience creating scalable applications.
• Proficient with code versioning tools including Git, Mercurial, CVS, and SVN.
• Familiarity with SQL/NoSQL databases.
• Ability to project manage.
• Good problem-solving skills.

Responsibilities :

- Assist in requirements gathering and technical planning to design solutions that meet client needs

- Create clean, well-documented, efficient, and standards-compliant code with an eye towards performance optimization

- Actively troubleshoot and support applications in production-- critical environments

- Implement and maintain Shopify development standards and best practices

- Tracks the work against plan and reports the status on agreed time without fail.

- Interface with the clients to understand and document their needs.

Primary Technical Skills:

Shopify and Shopify Plus

PHP

OOPS

JavaScript

XML

JSON

Basic Knowledge in React JS

Soft Skills

• Good oral and written communication.

Required Skills:

- 3 to 5 years of experience in working with Shopify and Shopify Plus stores

- Good  knowledge of frontend development and liquid programming language

- Strong hands to Install & Customize new Shopify theme.

- Basic experience in writing Ruby scripts to run promotions

- Experience in integrating external API’s

- Experience in 3^rd party integrations like ERP- Netsuite, SAP, Odoo, Microsoft Dynamics, Sage, Epicor etc.
- Experience in Implementing Shopify Ajax API, Admin APIs and configuring third party apps

- Knowledge of building custom, private and embedded apps

- Experience working with the following technologies: JavaScript (JQuery), XML, JSON, SQL, PHP, CSS3

- Knowledge in other ecommerce platforms like Magento, woocommerce, BigCommerce will be preferred.

- Experience with OOP PHP (2+ years)

- Familiarity with GIT

- Demonstrated ability to adapt and work with team members of various experience levels

- Ability to work with minimal direction with a focus on customer satisfaction

- Good written and verbal communication skills

1. Should have experience in full life cycle of Web Application Development in Linux environment using Apache, PHP, MySQL/MSSQL/ Oracle.

2. Hands on experience in these technologies is a must (PHP 5, Ajax, CSS / HTML5 / XHTML , Web development)

3. Should have experience in template engine like smarty and at least one MVC frame work (Laravel / Zend / Symphony / Cake Php / Code Igniter).

4. Should have worked on any of the content management system (Joomla / Drupal / Simple CMS etc)

5. Should have worked on any of one of JS frameworks like YUI, JQuery , MooTools, ExtJS and AJAX

6. Hands on experience with the following PHP modules: PEAR, CURL, SoapClient (WSDL mode), libXML, Memcache, PCRE, SQLITE, etc

7. Ability to write and consume SOAP & REST web services.

8. Create requirement document and work with team members to deliver the application.

9. Knowledge of Version Control Software ;such as SVN/CVS will be preferable.

10. Experience in Architecture Design & Developed of Web Application.

11. Should have experience in web application optimization/caching/DB performance tuning

12. Extensive OOD / OOP experience

13. Ability to propose, advocate and critique design alternatives to determine solutions.

14. Hands-on experience with web application architecture and relational database design Interact with Client to understand business requirement.

15. Hands on knowledge of best practices for cross-platform, cross-browser compatibility.

16. Hands on knowledge of UI optimization techniques and experience of working with UI performance measurement tools like Yslow, Firebux, Fiddler, HTTPWatch, Page Speed, DynaTrace, etc.

Essential duties and responsibilities include the following.

• Design, create and maintain databases through multiple product lifecycle environments, from development to production systems
• Configure and maintain database servers and processes, monitor system health and performance, to ensure high levels of performance, availability, and security.
• Convert complex business requirements into technical specifcations to build scalable and reliable data solutions 
• Apply data modelling techniques to ensure development and implementation support efforts meet integration and performance expectations.
• Independently analyse, solve, and correct issues in real time on production, providing problem resolution end-to-end.
• Refine and automate regular processes, track issues, and document changes.
• Develop complex query, performance tuning, stored procedures and triggers, scheduled jobs, schema refinement.
• Flexibility to work after office hours for any production issue or production deployment.
• Perform scheduled maintenance and support release deployment activities after hours.
• Share domain and technical expertise, providing technical mentorship and cross-training to other peers and team members.

Qualifications include:

• 4+ years of database and backend development experience
• Good understanding of database systems and architectures
• Expertise in writing complex SQL queries and stored procedures
• Hands on experience with RDBMS and NoSQL data stores like  MySQL and MongoDB
• Experience working with Python scripting and application development
• Experience working with Cloud applications and data stores like AWS RDS is a plus
• In-depth understanding of data management and ETL processes