Shadman Rahman is a Principal Product Manager with 15+ years of experience building products that have reached tens of millions of users across Bangladesh, Sweden, and global markets. His career spans the full stack of product work: UX and service design in the field, digital platform launches at national scale, social and recommendation systems in Europe, and now search, monetization, and AI discovery at the world's largest education marketplace. He brings four layers into his teaching: a BSc in Computer Science, an MSc in Human-Computer Interaction from Uppsala University, deep hands-on experience across every product discipline, and active work as a full-stack solo builder. Shadman is also an ADPList Global Top 50 Mentor, with 250+ product managers coached one-on-one.

Professional Experience:

Principal Product Manager, Search & Monetization at Keystone Education Group

At Keystone Education Group, the world's largest education marketplace (134M users, 60+ markets), Shadman owns the search, monetization through AdTech, and AI discovery product line. He rebuilt the platform's search system from scratch using hybrid retrieval and AI re-ranking, delivering +23% traffic, +11% leads, and 25% fewer drop-offs across 200,000+ programs. He recovered the recommendation engine from a 1.1x to 5.0x lead multiplier, making it the platform's largest lead volume channel. He led the monetization system that contributed to $20M in incremental annual revenue. His convergence strategy connecting search, AdTech, and the logged-in experience was adopted as the company's product vision. He has also scaled the PM team from 1 to 4 and leads a 15-person cross-functional squad. He was promoted from Senior PM to Principal PM in April 2026, the top of Keystone's individual contributor track.

Senior Product Manager, Core Experience & Machine Learning at Fishbrain (Sweden)

At Fishbrain, a social platform with 15 million users, Shadman led core engagement and monetization. He built the platform's first recommendation engine and interest-based social graph, which doubled daily active users and drove a ~30% lift in paid subscriptions to approximately 150,000 paying members. His field research in Florida and Montana directly shaped the feed monetisation strategy, improving content relevance by 40% and session time by 18%. He established the A/B testing and release dashboard cadence that reduced delivery cycle time by 25%.

Senior Product Manager, Digital Services at Grameenphone (Telenor Group)

Shadman joined Grameenphone as a UX designer and grew to Deputy General Manager of Digital Services, a progression across five years covering some of the most consequential product work in Bangladesh's digital history.

He built BlueBox, the biometric SIM registration platform delivered under a national government mandate in just six weeks. Designed for rural retailers with limited literacy, it enabled 100% of national SIM sales across 450,000+ retail outlets, was presented to the Telecom Minister, and was later adopted across six Telenor Asia markets. He grew MyGP from zero to 10 million users through gamification and personalization, and designed the EasyNet mobile onboarding experience that helped Bangladesh's internet user base grow from 14 million to 34.8 million users in three quarters.

He launched Bioscope (3 million users), GP Music (2.5 million users), and Hello Messenger. He won the Telenor Ignite Global Innovation Challenge and two National ICT Awards.

He also founded Grameenphone Academy, starting from a 10-student pilot and scaling it to 100,000+ graduates with partnerships from Cisco, IBM, and Dell. He co-designed the Future Nation curriculum, Bangladesh's national youth upskilling program, built in partnership with UNDP, Grameenphone, and BIDA.

UX and Product Management at Ekhanei.com and Cellbazaar (Schibsted Group)

Shadman's product roots are in UX research and service design. At Ekhanei.com and Cellbazaar, he led the UX redesign of one of Bangladesh's largest classifieds platforms. The work contributed to Schibsted's approximately $300 million investment for a 49% joint venture stake, with 80% improvement in site visits and 10,000 ad listings in nine months. He was subsequently promoted and relocated to Barcelona to lead global product integration across a 25-member cross-continental team.

As an instructor

Shadman's courses at Ostad are built on work he has actually done, not frameworks he has only read about. Whether it is product discovery, AI tools, search systems, or career strategy for aspiring PMs, his teaching draws directly from the products he has shipped, the mistakes he has made, and the patterns he has seen work across Bangladesh, Europe, and global markets. He has taught 5,000+ students across 9 batches. He also publishes claudecodeguide.dev, an open playbook for building with AI agents, used by practitioners and teams across the industry. If you are serious about building a product career that holds up in the real world, this is where to start.

S M Aliuzzaman Tushar is a Product Manager and UX strategist who brings a unique blend of product thinking, real-world problem-solving, and multi-industry experience to the classroom. From building HR tech platforms to launching digital healthcare and MSME solutions—Tushar has consistently led teams to deliver user-focused products that drive measurable impact. His expertise across product strategy, stakeholder collaboration, and user experience makes him a strong mentor for anyone aspiring to master product management.

Professional Experience
Senior Product Manager at Shomvob Jobs
At Shomvob, Tushar leads the product roadmap for a fast-growing HR-tech platform that connects job seekers with employers. He collaborates with developers, designers, and analysts to ship high-impact features that improve hiring efficiency and user satisfaction.

Former Product Owner at Grameen Digital Healthcare Solutions
In the digital healthcare space, Tushar built and improved products that bridged clinical needs with technology. He gathered feedback from healthcare providers and patients, led integrations with labs and insurers, and ensured the platform served both operational and patient-care goals.

Former Senior Product Manager at Hishabee
At Hishabee, he launched “Puji,” a product aimed at solving credit and supply chain issues in the FMCG sector. Tushar was deeply involved in everything from distributor onboarding to dashboard design, achieving high retention and reorder rates through effective product workflows and customer support enhancements.

Former UI/UX Designer at Zovari
Tushar began his journey by designing user interfaces for e-commerce platforms. His work involved mobile and web design, usability testing, and creating seamless product experiences—skills that still influence his product approach today.

With a background that spans product development, user research, and cross-functional leadership, Tushar understands what it takes to build solutions that work. He’s handled complex launches, scaled products for different markets, and solved problems that required both strategic thinking and hands-on execution.