Happy Adda Studios

Passionate about education?

CK-12 is on the lookout for talented, creative, and dedicated people to join our mission to provide great education to students around the world. We are looking for candidates to join our office at Bangalore.

We have a strong education platform that has served over 200 Million users, have got over 1.45 Billion questions answered and have got more than 285 thousand customised Flexbooks. We have embarked on exciting journey to build AI-powered student tutor and Teacher Assistant to build next generation of learning platform.

About CK-12 Foundation

CK-12’s mission​ is to provide free access to open-source content and technology tools that empower students as well as teachers to enhance and experiment with different learning styles, resources, levels of competence, and circumstances.

To achieve this noble and ambitious vision, we at CK-12 are challenging traditional model of education to transform it dramatically. Technology has opened up lots of opportunities to revolutionize education for the benefit of students, teachers and parents.

We have chosen to be non-profit so that we can effectively realize our mission and so that we can do the right thing! It also provides us the ability to experiment big and bold ideas. CK-12 is backed by Vinod Khosla, a renowned technology venture capitalist.

At CK-12, you’ll experience the benefits of working in a dynamic, entrepreneurial, innovative and non bureaucratic environment where you will get a lot of cool things done than you ever imagined! We are a small group of passionate folks who are determined to disrupt the current form of education. We came together from companies such as Apple, eBay, Amazon, McGraw-Hill, and startups.

Technology is key to scale education and we deeply believe in it. Come develop great solutions on our cloud based (AWS) and AI-first platform delivering rich ​and interactive content.

Does our mission, people ​and technologies excite you? If the answer is YES! and you are a great technologist who will challenge status-quo (no order takers please!) by innovating, please come join us! Together, we will change the world!

Check out how CK-12 is making an impact in teaching and learning - https://www.ck12info.org/about/testimonials/

Flexi, our AI-powered Student Tutor - https://www.ck12.org/pages/student-tutor/

AI-powered Teacher Assistant - https://www.ck12.org/pages/teacher-assistant/

Benefits: Medical and Accident Insurance, Free food orders for lunch.

Location: https://goo.gl/maps/NkA2Hr8JhtE3raWr5

OpsTree Global is a digital transformation and platform engineering partner that helps organizations build scalable, secure, and high-impact technology foundations. With expertise across cloud modernization, Data & AI, Observability & SRE, DevSecOps, security, quality engineering, and end-to-end software delivery, OpsTree enables faster, outcome-driven digital transformation.

As an AWS Advanced Tier Services Partner and App Modernization specialist, OpsTree blends cloud-native practices with AI-driven innovation to deliver resilient, high-performing platforms. Its in-house DevSecOps platform, BuildPiper, helps enterprises standardize and accelerate software delivery at scale.

Trusted by 250+ organizations—from startups to Fortune 100 enterprises—OpsTree is known for making software delivery lean, nimble, and highly productive. Driven by a culture of continuous learning, strong ethics, and thought leadership, OpsTree fosters a transparent and growth-oriented environment that empowers teams to build the next generation of cloud-native solutions.

We are Hiver. We are a bunch of folks with borderline devotional love for email, committed to the idea of making it noise-free and collaborative for teams. Why email you may ask? Email is one of the most common ways to communicate at work, is far less distracting than its chat counterparts, and lets you respond at your own pace. But it hasn’t evolved over the years to meet the changing collaboration needs of businesses. Teams have to rely on inefficient methods like Forwards and CCs to share information, often leading to messy threads and missed emails. Not to mention the toll it takes on your productivity, ability to concentrate and all things zen. We at Hiver are trying to solve this by giving email collaborative superpowers and, in the process, giving you back the most important currency there is - time.

Founded in 2011, CallHub is an easy to use and award winning voice broadcasting, phone banking and SMS broadcast software that seamlessly integrates with users' existing systems. They are used across 200 countries and world renowned campaigns run by Uber, Greenpeace, Harvard University, Princeton University, Change.org, Save the Children, United Workers Union, among many others.

Check out the video below for a sneak peek into the product!

CallHub, headquartered in Washington DC, is the leading digital organizing platform for political campaigns, nonprofits, advocacy groups, and businesses seamlessly interact with their audiences worldwide.

The product

Their call center software enables unlimited agents to connect with people over a call to have personalized one-on-one conversations. The range of automated dialers (which include Power, Preview, Predictive, and Fast Click dialers) gives clients complete control over their dialing speed based on your needs while maintaining compliance. With features like answering machine detection, voicemail drop, phone number verification, and many more, the software ensures you spend maximum time having quality conversations. CallHub's mass texting solution lets users connect with people over SMS with solutions like Bulk SMS, MMS, SMS Opt-in and peer-to-peer texting.

We are Proximity - a global team of coders, designers, product managers, geeks and experts. We solve hard, long-term engineering problems and build cutting edge tech products.

About us

Born in 2019, Proximity Works is a global, fully distributed tech firm headquartered in San Francisco - with hubs across Mumbai, Dubai, Toronto, Stockholm, and Bengaluru. We’re in the business of solving high-stakes engineering challenges with AI-powered solutions tailored for industries like sports, media & entertainment, fintech, and enterprise platforms. From real-time game analytics and ticketing workflows to creative content generation, we help build software that serves millions every day.

About the Founders

At the helm is Hardik Jagda, CEO - a technologist with a startup DNA who brings clarity to complexity and a passion for building delightful experiences.

Milestones & Impact

• Trusted by some of the world’s biggest players - from major media & entertainment giants to one of the world’s largest cricket websites and the second-largest stock exchange in the world.
• Delivered game-changing tech: slashing content creation by 90%, doubling performance metrics for NASDAQ clients, and accelerating speed/performance wins for platforms like Dream11.

Culture & Why It Matters

• Fully distributed and flexible: work 100% remotely, design your own schedule, build habits that work for you and not the other way around.
• People-first culture: Community events, “Proxonaut battles,” monthly off-sites, and a liberal referral policy keep us connected even when we’re apart.
• High-trust environment: autonomy is encouraged. You’re empowered to act, learn fast, and iterate boldly. We know great work comes when talented people have space to think and create.

BPO Hirings