
Roles and Responsibilities
- Apply knowledge set to fetch data from multiple online sources, cleanse it and build APIs on top of it
- Develop a deep understanding of our vast data sources on the web and know exactly how, when, and which data to scrap, parse and store
- We're looking for people who will naturally take ownership of data products and who can bring a project all the way from a fast prototype to production.
- Integrating and maintaining Python services
- Developing robust microservices and applications
Desired Candidate Profile
- Strong relevant experience of at least 2-3 years.
- Strong coding experience in Python3.
- Should have good experience with Django and NodeJs.
- Proficient on modelling applications on both RDBMS and NOSQL databases
- Should have experience in web scraping
- Good understanding and hands-on with scheduling and managing tasks with cron
- Should have experience with microservice architecture
- Compile and analyze data, processes, and codes to troubleshoot problems and identify areas for improvement
- Should have experience in shell scripting, GIT and docker
- Writing unit tests for 100% code coverage.

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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.



Requirements
- Design and implement a full-stack web application using Python Django framework and ReactJS.
- 1+ years of experience in building and deploying web applications.
- Experience in designing and using RESTful APIs.
- Basic knowledge in front-end technologies such as JavaScript, , ReactJS, HTML5, and CSS3.
- Understanding of fundamental design principles behind a scalable application.
- Understanding of databases, SQL and non-relational, plus the Django ORM.
- Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model.
- Experience in web mark-up like HTML and CSS.
- Experience with data structure libraries.
- Familiarity with RESTful APIs.
- A knack for bench marking and optimization.
- Knowledge of modern authorization mechanisms, such as JSON Web Token.
- Familiarity with modern front-end build pipelines and tools.
- Experience with common front-end development tools such as NPM etc.
- Strong knowledge of Git version control.
- Experience deploying Python applications into production.
- Amazon Web Services (AWS) knowledge is a plus.
Responsibilities
- Writing reusable, testable, and efficient code.
- Design and implementation of low-latency, high-availability, and performance applications using Django framework in Python.
- Create and use the REST APIs for communicating with other apps.
- Assess and prioritize feature requests and work in Agile framework.
- Implementation of security and data protection algorithms.
- Integration of data storage solutions like databases, key-value stores, blob stores, S3 etc.
- Improve the functionality of existing systems and applications.
- High commitment to work and taking ownership of deliverables.
- Help to research and influence our path forward with strategic technology initiatives.

What would make you a good fit?
- You’re both relentless and kind, and don’t see these as being mutually exclusive
- You have a self-directed learning style, an insatiable curiosity, and a hands-on execution mindset
- You have deep experience working with product and engineering teams to launch backend services that power end-user applications
- You have deep experience in Python and the related tools and frameworks
- You have deep experience working with large datasets and relational databases, specifically PostgreSQL
- You have experience with microservices architecture, Docker, and Kubernetes
- You continuously raise the bar on development practices such as code quality tools, unit testing coverage, build tools, etc.
- You obsess about correctness, DRY development, reducing cognitive complexity, and performance
- You have excellent writing and speaking skills with a talent for applying technical solutions to customer problem statements
Must-Have Qualifications
- 5+ years of experience building RESTful services
- 2+ years of experience in Django Rest Framework, Flask, and/or FastAPI
- 3+ years of experience with SQL and Postgres to manage and analyze data
- Expert level skills using a debugging tool and developing unit tests
- Experience in Docker, Kubernetes, and microservices architecture
- Prior startup experience and enjoy taking on difficult challenges and broad responsibilities
- Track-record of delivering reliable and scalable RESTful services from requirements to production
- You’ve partnered with devops to deliver high-performant backend solutions to production
- You naturally think quantitatively about problems and work backward from a customer outcome
What’ll make you stand out (but not required)
- Terraform and AWS experience
- Experience creating technical design documents
- You have a strong connection to finance teams or closely related domains, the challenges they face, and deep appreciation for their aspirations

Sizzle is an exciting new startup that’s changing the world of gaming. At Sizzle, we’re building AI to automate gaming highlights, directly from Twitch and YouTube streams. We’re looking for a superstar Python expert to help develop and deploy our AI pipeline. The main task will be deploying models and algorithms developed by our AI team, and keeping the daily production pipeline running. Our pipeline is centered around several microservices, all written in Python, that coordinate their actions through a database. We’re looking for developers with deep experience in Python including profiling and improving the performance of production code, multiprocessing / multithreading, and managing a pipeline that is constantly running. AI/ML experience is a plus, but not necessary. AWS / docker / CI/CD practices are also a plus. If you are a gamer or streamer, or enjoy watching video games and streams, that is also definitely a plus :-)
You will be responsible for:
- Building Python scripts to deploy our AI components into pipeline and production
- Developing logic to ensure multiple different AI components work together seamlessly through a microservices architecture
- Managing our daily pipeline on both on-premise servers and AWS
- Working closely with the AI engineering, backend and frontend teams
You should have the following qualities:
- Deep expertise in Python including:
- Multiprocessing / multithreaded applications
- Class-based inheritance and modules
- DB integration including pymongo and sqlalchemy (we have MongoDB and PostgreSQL databases on our backend)
- Understanding Python performance bottlenecks, and how to profile and improve the performance of production code including:
- Optimal multithreading / multiprocessing strategies
- Memory bottlenecks and other bottlenecks encountered with large datasets and use of numpy / opencv / image processing
- Experience in creating soft real-time processing tasks is a plus
- Expertise in Docker-based virtualization including:
- Creating & maintaining custom Docker images
- Deployment of Docker images on cloud and on-premise services
- Experience with maintaining cloud applications in AWS environments
- Experience in deploying machine learning algorithms into production (e.g. PyTorch, tensorflow, opencv, etc) is a plus
- Experience with image processing in python is a plus (e.g. openCV, Pillow, etc)
- Experience with running Nvidia GPU / CUDA-based tasks is a plus (Nvidia Triton, MLFlow)
- Knowledge of video file formats (mp4, mov, avi, etc.), encoding, compression, and using ffmpeg to perform common video processing tasks is a plus.
- Excited about working in a fast-changing startup environment
- Willingness to learn rapidly on the job, try different things, and deliver results
- Ideally a gamer or someone interested in watching gaming content online
Seniority: We are looking for a mid to senior level engineer
Salary: Will be commensurate with experience.
Who Should Apply:
If you have the right experience, regardless of your seniority, please apply.
Work Experience: 4 years to 8 years
About Sizzle
Sizzle is building AI to automate gaming highlights, directly from Twitch and YouTube videos. Sizzle works with thousands of gaming streamers to automatically create highlights and social content for them. Sizzle is available at www.sizzle.gg.

o Strong Python development skills, with 7+ yrs. experience with SQL.
o A bachelor or master’s degree in Computer Science or related areas
o8+ years of experience in data integration and pipeline development
o Experience in Implementing Databricks Delta lake and data lake
o Expertise designing and implementing data pipelines using modern data engineering approach and tools: SQL, Python, Delta Lake, Databricks, Snowflake Spark
o Experience in working with multiple file formats (Parque, Avro, Delta Lake) & API
o experience with AWS Cloud on data integration with S3.
o Hands on Development experience with Python and/or Scala.
o Experience with SQL and NoSQL databases.
o Experience in using data modeling techniques and tools (focused on Dimensional design)
o Experience with micro-service architecture using Docker and Kubernetes
o Have experience working with one or more of the public cloud providers i.e. AWS, Azure or GCP
o Experience in effectively presenting and summarizing complex data to diverse audiences through visualizations and other means
o Excellent verbal and written communications skills and strong leadership capabilities
Skills:
Python

Company Introduction –
- Information Security & Data Analytics Series A funded company.
- Working in cutting edge technologies - Using AI for predictive intelligence and Facial Biometrics.
- Among Top 5 Cyber excellence companies globally (Holger Schulze awards)
- Bronze award for best startup of the year (Indian Express IT awards), only cyber Security Company in top 3.
- More than 100+ clients in India.
Job Description:-
Job Title: Python Developer
Key Requirements:-
- Mine data from structured and unstructured data sources.
- Extract data (text, images, and videos) from multiple documents in different formats.
- Extract information and intelligence from data.
- Extract data based on regular expressions.
- Collect data from structured RDBMS databases.
- Work closely with Project/Business/Research teams to provide mined data/intelligence for analysis.
- Should have strong exposure to core python skills like multiprocessing, multithreading, file handling, data structure like JSON, Data frames, and User Defined Data structure.
- Should have excellent knowledge of classes, file handling, memory manipulations.
- Strong Knowledge in Python.
- Strong exposure to frond end languages like CSS, JavaScript, Ajax etc.
- Should have exposure to requests, Frontera, scarpy-cluster, elastic-search, distributed computing tools like Kafka, Hbase, Redis, Zookeeper, restAPI.
- Should be familiar with *nix development environment.
- Knowledge of Django will be added advantage.
- Excellent knowledge on Web Crawling/Web scraping.
- Should have used scraping modules like Selenium, Scrapy, and Beautiful soup.
- Experience with text processing.
- Basics of databases. Good troubleshooting and debugging skills.
Experience : 1-4 Years Experiene
Education
B.Tech, MCA, Computer Engineering


About MoEngage
MoEngage is a fast-paced startup that’s helping companies run smart marketing efforts in their effort to reach the customer. We are a leading Marketing Technology Stack provider that is helping brands redefine their customer engagement in the mobile era. Brands use MoEngage to drive long-term, personalised and context-based engagement across channels to help achieve increased customer retention as well as customer LTV. Sitting at a conflux of diverse technologies like Artificial Intelligence, Big Data, Web & Mobile platforms, MoEngage technology analyses billions of data points generated by customers and their devices, to predict customer behavior and build marketing campaigns that proactively engage users.
In just four years since inception, MoEngage is working with leading brands across e-commerce, entertainment, travel, publishing and banking domains among others. With marquee clients like Vodafone, Oyo, Airtel, McAfee, MoEngage has over 125+ paying Customers in the Enterprise & Internet companies space in India, US, South East Asia & EU. With a global presence spanning 35 countries, MoEngage has offices in San Francisco, Berlin, Jakarta, and Bengaluru.
Today, MoEngage is an industry pioneer in the space and engages more than 350M devices. This includes approximately 40B events tracked per month, 30B+ messages sent, to millions of users across the globe.
As part of the Engineering team at MoEngage, here are some things you can expect:
- Take ownership and be responsible for what you build - no micro management
- Work with A players (some of the best talent in the country), and expedite your learning curve and career growth
- Make in India and build for the world at scale of 350M active users, which no other internet company in the country has seen
- Learn together from different teams on how they scale to millions of users and billions of messages.
- Explore the latest in topics like Data Pipeline, MongoDB, ElasticSearch, Kafka, Spark, Samza and share with the team
and more importantly have fun while you work on scaling MoEngage.
About Push team,
Push team is one of the core teams at MoEngage, responsible for sending close to a billion notifications everyday to help clients engage their users better. As a member of the Push team, you will be working on developing high performance solutions to deliver personalised and context-based notifications across various channels to help achieve increased customer retention as well as customer LTV. You will also be working on designing and building features to help clients to provide customised experience for end users allowing them to have a more personalised experience at scale. Here you will have a chance to own systems and develop features end to end i.e right from inception to deployment. Though we work at scale, reliability is of utmost importance for us and we build in house solutions like Campaign Watcher & AutoBatchRunner to ensure 100% transparency and delivery of notifications
- Scaling campaign sending system to ensure industry leading delivery times (40 Million notifications under 2 minutes)
- Rich campaign content delivery and templating support
- Build and develop features to have appealing and consistent experiences across channels which touch 200+ customers and 200+ million users!
Skill Requirements
- Proven experience in handling large infrastructure and distributed systems
- Familiarity with Python related technologies and frameworks like Django or Pyramid.
- Familiarity with at least one of the cloud computing infrastructure - GCP / Azure / AWS
- Familiarity with task queue frameworks like Celery or Pika is a plus.
- Tech Stack - Python, Falcon, Elastic Search, MongoDB, AWS (SQS S3), Linux, Map Reduce



