Python 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

• 6+ 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.

What kind of work will you get?

We are looking for a Python developer.

Examples of technical tasks:

Working on our backend SDK to implement APIs that will be consumed by the frontend widgets

Designing APIs for different auth recipes

Architecting auth flows

You will also be given non technical tasks like product brain storming, competitor analysis and writing documentation.

Note: Compensation is as per the applicant's geography

Requirements

Well versed in Python with 2+ years of professional experience

Familiar with and comfortable working with Web frameworks like FastAPI, Django and Flask

Familiar with HTTP networking in Python

Strong understanding of async and sync modes in Python

Bonus:

Contributed to open source, or have your own open source repo with a community and many github stars

Built an in-house authentication or authorization solution or worked with solutions such as Keycloak, Auth0, Ory, Okta etc

Online group buying platform that helps people connect with likeminded people who want to buy the same item/product at a discounted price.

 

• Overlook development of all consumer products in JAVA and
• Optimize components for maximum performance across a vast array of web-capable devices and
• Focus on code maintainability and performance of
• Provide technical advice and assists in solving programming
• Continuously create new and interactive features that would help to improve user experience and user engagement.
• Assist with troubleshooting of issues as
• Lead the design and architecture of software
• Assist in developing and maintaining continuous integration.

 

• Skills required: JAVA, Python (Flask and Django), Spring/Spring Boot, React, Hibernate,
• 2+ years of experience in Java and Python
• Linux, REST, Kafka, Mysql,, AWS, ELK Stack (Elasticsearch), CI/CD
• Good experience in Java and/or Python based
• Experience in designing databases and system
• Experience in building products from scratch at well-funded start-ups

 

 

Requirement-

Architect, develop and maintain highly scalable, reliable and secure distributed backend
systems on Cloud (AWS or Azure) or on-premises environments for Mihup, its customers
and partners.
 Work closely with your fellow engineers to develop systems capable of concurrently
processing massive amounts of voice data both in online real-time as well as offline
environments.
 Drive accountability for test driven development, delivery of high-quality features and
resilient enterprise class solutions.
 Lead a culture of team ownership and direct individual and team accountability to
continuously improve how they work to achieve results.
 Work in a startup environment, pushing boundaries with deep involvement with business.

BE//BTech/ME/MTech in Computer Science or a related field from a Tier I or Tier II
University.
 6-8 years of hands-on software development and deployment experience (experience of
working in a consumer product startup during its growth phase will be a plus) of which 1 – 2
years of experience would be in leading a team of software developers.
 Expertise in Java 8+ and Spring Boot is a must
 Good experience in messaging platforms like RabbitMQ/Kafka
 Good experience in distributed systems and relational & NoSQL databases like PostgreSQL,
MySQL, Redis, MongoDB, etc.
 Expertise in one or more of: Python, NodeJS, GoLang would be preferred
 Must have hands on experience in products which handle multiple concurrent calls (API),
handle CPU intensive jobs, consist of multiple asynchronous system calls.
 Worked on microservices based architecture and design
 Managed/ Owned infrastructure on AWS/Microsoft Azure/private clouds and setup high
availability systems
 Knowledge of Docker and Kubernetes
 Knowledge of RESTful APIs, caching concepts, the HTTP protocol and general web
architecture
Pluses
1. Anything that will let us know more about who you are that you would like to share such as
Blogs, Twitter, Medium, GitHub etc. 

Responsibilities:

• Hand on experience in Golang/Python/Ruby on Rails /Node.Js
• Must have at least 1+ years of experience in Team Handling

Roles and Responsibilities
● 3-6 Years of experience with a Bachelor’s/Master's degree in Computer Science, Math, or related
technical domain
● Skilled in software development lifecycle, and designing and developing large-scale, multi-tiered,
distributed software applications, tools, systems or services using Object Oriented Design,
distributed programming, Java, Python, Node.js.
● Knowledge of ORM tools like Hibernate, JPA.
● Good knowledge of one or more relational and NoSQL databases
● Experience in deployment of microservices over Amazon Web Services
● Experience in delivering quality products using microservices architecture.

● Knowledge of Agile methodologies & best practices for the full software development life cycle,
including coding standards, code reviews, source control management, build processes, testing,
and operations
● Strong hold on Data Structure, Problem solving skills
To succeed at Zest, you will need
● Ability to operate and communicate with every business unit and level of hierarchy
● High levels of energy and enthusiasm for all that you do
● Be someone who does not take “no” for an answer and pushes for continuous innovation and
evolution
● Have extremely high standards in everything you do – you will be required to keep raising the bar
● Ability to think big and to inspire a vision in others
● Kindness, warmth and a positive, optimistic attitude
And what do you get in return?
● Opportunity to be part of one of the most exciting consumer growth stories in the world
● One of the best funded and most far advanced companies in the space (investors are leading
global VCs)
● We will teach you all you need to know about “Fintech”
● Endless amounts of learning and development – formal and informal
● Ability to work with some of the best, nicest and most passionate people in the digital lending
industry – from all over the world
● Founders with the right vision and motivation to make this a success story
● Freedom to work how you like (we do not do ‘facetime’)
● A culture of trust and honesty – we will not second guess you
● A flat structure with minimal politics or hierarchy
● Recognition and respect for your work
● Market beating compensation and Equity ownership for the best candidate
● Lunch, great healthcare, decent coffee and a nice office.

Since we are a startup if the candidate works to our expectation with zeal to learn and develop products.

We will be willing to offer ESOPs in the future.

Roles and Responsibilities- Will be sole responsibility for all tech realted issues.

We have already built a web application. 

-The candidate will be responsible for the backend needs of the company and solely responsible for the project
- The backend languages is Python-Django Framework
-The candidate should have worked on big scalable projects before and shall be able to execute.
- Should be able to complete work on time.-Developer should be willing to learn as the project is multi-functional and dynamic.


1. Installing APIs
2. Design, develop and test features from inception to rollout
3. Write high quality code that is scalable, testable, maintainable and reliable

Experience designing highly interactive web applications with performance,
scalability, accessibility, usability, design, and security in mind. If you don't have all
of these, that's ok, but be excited about learning the few you don't know.
 Familiar with building complex web applications using Javascript / AJAX, XHTML,
CSS.
 Experience with or knowledge of jQuery, Java, Struts, and other website technologies.
 Strong, object-oriented design and coding skills (C/C++ and/or Java preferably on a
UNIX or Linux platform)
 Solid software development background including design patterns, data structures,
test driven development
 Knowledge of Perl or other scripting languages a plus
 Experience with distributed (multi-tiered) systems, algorithms, and relational
databases
 Software development experience in building highly scalable applications
 Master’s degree in Computer Science, Computer Engineering or related technical
discipline
 Experience in eCommerce and Deep hands-on technical expertise
 Ability to handle multiple competing priorities in a fast-paced environment
 Experience working with service oriented architectures and web based solutions.

You write beautiful Python code (and might follow PEP8 coding style standards). You have extensively worked on Linux (Ubuntu or other flavours). Good understanding of RESTful services and API Comfortable with Web frameworks, such as Flask or Django. Fluent with Git Good understanding of NoSQL document databases (preferably MongoDB) You are a proactive self-starter, and capable of making independent decisions. You have a passion for innovation and working in a start-up environment. Good to have: Other programming languages like Java, Scala, R, Clojure etc. (You have a flair for quickly picking up any language.) Good object oriented design skills and knowledge of design patterns. Knowledge of key-value stores, caching, search, messaging queues (ElasticSearch, RabbitMQ, Memcached, Redis, etc.). Knowledge of Javascript (preferably AngularJS). Experience or enthusiastic in Natural Language Processing, Machine Learning is a huge plus. Good written and verbal communication skills.