# David Krajewski

![David Krajewski](/resources/cognition/portraits/david-krajewski.webp)

Staff @ Cognition | CMU CS | Neo Scholar | Ex-Reve  
Cognition  
San Francisco, California, United States

## At Cognition

- Role: Member of Technical Staff (Engineering)
- Joined: Jul 2026
- How they joined: Directly
- Before Cognition: Member of Technical Staff, Reve Image
- Overlapped before Cognition with other Cognition people at: Amazon (https://www.autumn.ai/resources/cognition/worked-together)

## Identity
- LinkedIn: https://www.linkedin.com/in/dkraj
- X: @dkrajews123
- GitHub: https://github.com/kraj011
- Website: https://davidkrajewski.com/

## Notes
- He then co-shipped Devin swarms / Code Scans with Ido Pesok: @spdling: "We're going beyond single agents to Devin swarms. Shout out to @dkrajews123 @ido_pesok for the ship!"; his own reaction was "had so much fun building this". Jeff Wang, Jared Palmer and Alex Kaplan posted the launch the same day. (https://x.com/dkrajews123/status/2100279468090925326)
- At Cognition he shipped GitHub Stacked PRs support in Devin as his first ship: Steven Ding (@spdling) posted "Stacking is now in Devin. Shoutout to @dkrajews123 on his first ship" and Jared Palmer credited him on the integration, about one month after he joined in July 2026. (https://x.com/dkrajews123/status/2082872666550313145)
- Reposted on X (credit/launch context): "RT @spdling: We're going beyond single agents to Devin swarms.

Shout out to @dkrajews123 @ido_pesok for the ship!" (https://x.com/dkrajews123/status/2100279468090925326)
- Reposted on X (credit/launch context): "RT @spdling: Stacking is now in Devin. Shoutout to @dkrajews123 on his first ship" (https://x.com/dkrajews123/status/2082872666550313145)
- LinkedIn post announcing his move to Reve: "Excited to finally share that I'll be joining Reve Image full-time after I graduate!" and "I knew I wanted to join a startup that was conducting cutting-edge graphics AI research, was product-first, and cared about the next generation of creative tools. Reve was the perfect fit." He thanked Chelsea Guo and Harshika G (recruiting) and Christian Cantrell. (https://www.linkedin.com/posts/dkraj_introducing-reve-image-preview-activity-7309993725248630788-Hs4E)
- Public headline says "Staff @ Cognition | CMU CS | Neo Scholar | Ex-Reve". (https://www.linkedin.com/in/dkraj)
- Posted on X: "had so much fun building this 🥹" (https://x.com/dkrajews123/status/2100256420117832181)
- Posted on X: "@DarraghBurke_ and @ZreikJorge cooked..." (https://x.com/dkrajews123/status/2092657735896846461)
- Posted on X: "Proud to announce Devin no longer writes bugs https://t.co/dWhHpQJTPl" (https://x.com/dkrajews123/status/2090647137008931054, https://t.co/dWhHpQJTPl)
- Posted on X: "I've only been at Cog for a month, but working with Devin really feels like something out of a sci fi movie.
It's hard to imagine developing without it!" (https://x.com/dkrajews123/status/2090143095409332519)
- Posted on X: "🫡🫡" (https://x.com/dkrajews123/status/2082872131457884436)
- Public headline says "Staff @ Cognition | CMU CS | Neo Scholar | Ex-Reve". (https://www.linkedin.com/in/dkraj)
- Reposted on X (credit/launch context): "RT @jeffwang: Introducing Code Scans, our second product from agent swarms. You can scan across your code base for tasks such as making thi…" (https://x.com/dkrajews123/status/2100335008926015668)
- Reposted on X (credit/launch context): "RT @jaredpalmer: Code Scans are a new primitive in @DevinAI. Borne out of Security Scans, Code Scans are a generalized way to  deeply audit…" (https://x.com/dkrajews123/status/2100264424858923045)
- Reposted on X (credit/launch context): "RT @joon_h_lee: We've partnered with @github to bring Stacked PRs to Devin! One of my favorite new features - it makes code review a lot mo…" (https://x.com/dkrajews123/status/2082919461980684360)
- Reposted on X (credit/launch context): "RT @jaredpalmer: Making good progress on getting @DevinAI to work with @GitHub Stacked PRs (which are still in private preview)

(h/t @dkr…" (https://x.com/dkrajews123/status/2081078838537363754)
- Recent open-source project: VulkanRayTracer (Rust), created 2025-12-07, continuing his GPU graphics/rendering focus after CMU. (https://github.com/kraj011/VulkanRayTracer)
- LinkedIn post on 2025-09-15: "Excited for people to finally see what we've been working on!", tied to a Reve launch during his first weeks as Member of Technical Staff there. (https://www.linkedin.com/posts/dkraj_excited-for-people-to-finally-see-what-weve-activity-7373408236940705793-EcPv)
- Submitted to the final-project rendering competition of CMU 15-468/668/868 Physics-based Rendering (Spring 2025), a graphics track. (http://graphics.cs.cmu.edu/courses/15-468/2025_spring/pa4_competition.html)
- Contributed a pull request to google-research/readout_guidance (the official PyTorch implementation of Readout Guidance, CVPR 2024): "Fix text_encoder_projection_dim error by kraj011". (https://github.com/google-research/readout_guidance/pull/6)
- Repo bci-wheelchair is the Tartan NeuroTech EEG-Controlled Wheelchair Project (2022). (https://github.com/kraj011/bci-wheelchair)
- Previous roles include Member of Technical Staff at Reve Image; 15-462 Computer Graphics Teaching Assistant at Carnegie Mellon University; Applied AI Research Intern at SketchPro.ai; Software Engineer Intern at Niantic, Inc.; Software Engineer at Amazon Web Services (AWS); Software Engineer at Ternary Developments; Founder / CEO at Swiped Solutions LLC; Machine Learning Researcher at University of Florida. (https://www.linkedin.com/in/dkraj)
- CMU 16-726 (Learning-Based Image Synthesis, Spring 2024) project page by dkrajews: GAN inversion, "we first invert different GAN models to try and find latent codes that match given images". (https://www.andrew.cmu.edu/course/16-726-sp24/projects/dkrajews/proj5/)
- LinkedIn post: "I will be joining Amazon as an intern in the Seattle area this Summer!", thanking Eugene Li and Sebastian Sanso for guiding him through the application; this was the summer 2022 AWS software engineering role. (https://www.linkedin.com/posts/dkraj_amazon-amazonintern-cmu-activity-6908824465262931968-nk1U)
- Miami Community Newspapers 'Positive People in Pinecrest' profile (Gulliver Prep senior headed to CMU SCS): Gulliver Prep senior David Krajewski is on his way to Carnegie Mellon where he will be taking classes in their School of Computer Science. (https://communitynewspapers.com/positive-people/positive-people-in-pinecrest-david-krajewski/)
- Miami Community Newspapers 'Positive People in Pinecrest' profile (Gulliver Prep senior headed to CMU SCS): He hasn't chosen his exact major yet. He's interested in Artificial Intelligence, robotics, and software engineering. (https://communitynewspapers.com/positive-people/positive-people-in-pinecrest-david-krajewski/)
- Miami Community Newspapers 'Positive People in Pinecrest' profile (Gulliver Prep senior headed to CMU SCS): "I'm going to take classes in all the fields," he says. "Once I take those classes I will hone in on one of them." (https://communitynewspapers.com/positive-people/positive-people-in-pinecrest-david-krajewski/)
- Miami Community Newspapers 'Positive People in Pinecrest' profile (Gulliver Prep senior headed to CMU SCS): One of his main volunteer jobs is working with the Recycle Refresh Club at Gulliver. (https://communitynewspapers.com/positive-people/positive-people-in-pinecrest-david-krajewski/)
- Miami Community Newspapers 'Positive People in Pinecrest' profile (Gulliver Prep senior headed to CMU SCS): "We'll take computer donations and we'll fix them up," he says. "Receiving, fixing them, either replacing screens or updating software and from there we donate them." (https://communitynewspapers.com/positive-people/positive-people-in-pinecrest-david-krajewski/)
- Previous roles include Member of Technical Staff at Reve Image; 15-462 Computer Graphics Teaching Assistant at Carnegie Mellon University; Applied AI Research Intern at SketchPro.ai; Software Engineer Intern at Niantic, Inc.; Software Engineer at Amazon Web Services (AWS); Software Engineer at Ternary Developments; Founder / CEO at Swiped Solutions LLC; Machine Learning Researcher at University of Florida. (https://www.linkedin.com/in/dkraj)
- Named on CMU School of Computer Science Fall 2024 Dean's List. (https://cs.cmu.edu/academics/resources/deans-list-fall-2024.pdf)
- Location is San Francisco, California, United States. (https://www.linkedin.com/in/dkraj)
- Location is San Francisco, California, United States. (https://www.linkedin.com/in/dkraj)

## Experience
- Member of Technical Staff at Cognition (Jul 2026 - Present)
- Member of Technical Staff at Reve Image - San Francisco Bay Area (Aug 2025 - Jul 2026)
- 15-462 Computer Graphics Teaching Assistant at Carnegie Mellon University - Pittsburgh, Pennsylvania, United States (Jan 2024 - May 2025)
- Applied AI Research Intern at SketchPro.ai - San Francisco, California, United States (May 2024 - Aug 2024): Read and productionized diffusion papers, often on the day of their release, into our AI-based CAD rendering platform
Owned features from research and model deployment in Python to implementation into our React and Express.js codebase
Conducted customer and onboarding calls, understanding and prioritizing feature requests during a closed beta period
- Software Engineer Intern at Niantic, Inc. - San Francisco, California, United States (May 2023 - Aug 2023): Helped launch Campfire (social app), pushing consumer-facing features to approximately 4 million daily active users.
Implemented LLM-based tool for automatic large-scale data population and user automation across multiple environments
Developed memory optimization techniques for Redis caching, saving terabytes of cached data.
- Software Engineer at Amazon Web Services (AWS) - Seattle, Washington, United States (May 2022 - Aug 2022): Worked under the Amazon Forecast team, focusing on Machine Learning based time series forecasting.
Built an automation platform to optimize on-call engineers’ routine product maintenance using React.js and Python
- Software Engineer at Ternary Developments (Mar 2021 - Oct 2021): Developed and maintained new features for membership management dashboard for administrators and users. Led development on the OptionsFlow platform, processing over 1.5 million stock options in real-time to give thousands of users live data on market movement.
- Founder / CEO at Swiped Solutions LLC - Miami/Fort Lauderdale Area (Jun 2018 - Jan 2021): Provide a quick and convenient mobile solution for automating the process of checking out on high traffic websites. Work using the Swift programming language on both implementing the front end and the back end of the iOS application, using innovative networking techniques to provide seamless transitions between HTTPS requests and browser views. Create and implement an analytics system for tracking user traffic from within the application and sending that to a custom built rest API.
- Machine Learning Researcher at University of Florida - Miami, Florida, United States (Jun 2020 - Sep 2020): Used LSTM networks to predict occupancy rates, average daily rates, and overall demand for hotels in the U.S and China. Prioritized predictions during times of crisis (such as the Covid-19 pandemic). Published and presented at the Annual Graduate Education and Graduate Student Research Conference in Hospitality and Tourism. Worked under supervision from Ph.D. student and assistant professor Tianyu Pan.
- Freelance Software Developer at Self-Employed - Miami/Fort Lauderdale Area (Jun 2018 - Jun 2020): Provide clients with end to end development for their requested project. Work with making rest APIs using Node.js, websites with React.js, and mobile apps using React Native. Worked on a variety of solutions specifically tailored to the client's needs.
- (Cancelled) Computational Science Researcher at University of Miami,  Miller School of Medicine - Miami, Florida, United States (Jan 2020 - Jan 2020): J.J Vance Internship using Computational Science in the field of Human Genomics. Offer withdrawn due to the Coronavirus pandemic.
- Engineering Intern at AHT Global - Miami/Fort Lauderdale Area (Jun 2018 - Aug 2018): Worked on consumer sound, network, and home theater equipment designing and fabrication team.

## Education
- Carnegie Mellon University School of Computer Science - Bachelor of Science - BS, Computer Science - (Jan 2021 - May 2025): Dean's List: S24 F25 S25
- University of Miami - Dual Enrollment - (Jan 2020 - Jan 2021)

## Sources
- https://www.linkedin.com/in/dkraj
- https://www.linkedin.com/posts/dkraj_introducing-reve-image-preview-activity-7309993725248630788-Hs4E
- https://www.linkedin.com/posts/dkraj_excited-for-people-to-finally-see-what-weve-activity-7373408236940705793-EcPv
- https://www.linkedin.com/posts/dkraj_amazon-amazonintern-cmu-activity-6908824465262931968-nk1U
- https://pokeripa.com/teams/carnegie-mellon-university-2022-2023/
- http://graphics.cs.cmu.edu/courses/15-468/2025_spring/pa4_competition.html
- https://github.com/kraj011/VulkanRayTracer
- https://github.com/kraj011/bci-wheelchair
- https://communitynewspapers.com/positive-people/positive-people-in-pinecrest-david-krajewski/
- https://api.github.com/users/kraj011
- https://api.github.com/users/kraj011/repos?per_page=100&sort=updated
- https://x.com/dkrajews123
- https://cs.cmu.edu/academics/resources/deans-list-fall-2024.pdf
- https://github.com/google-research/readout_guidance/pull/6/overview
- https://www.andrew.cmu.edu/course/16-726-sp24/projects/dkrajews/proj5/
- https://github.com/kraj011
- https://davidkrajewski.com/
- https://www.linkedin.com/company/reveimage/posts
- https://www.linkedin.com/in/taesung-park-81578634?miniProfileUrn=urn%3Ali%3Afsd_profile%3AACoAAAc7yREBMzJ5HZon_GxwZnbYjxgIHiXseF4
- https://www.linkedin.com/company/delta-org/posts
- https://x.com/dkrajews123/status/2100279468090925326
- https://x.com/dkrajews123/status/2082872666550313145
- https://x.com/dkrajews123/status/2100256420117832181
- https://x.com/dkrajews123/status/2092657735896846461
- https://x.com/dkrajews123/status/2090647137008931054
- https://t.co/dWhHpQJTPl
- https://x.com/dkrajews123/status/2090143095409332519
- https://x.com/dkrajews123/status/2082872131457884436
- https://x.com/dkrajews123/status/2100335008926015668
- https://x.com/dkrajews123/status/2100264424858923045
- https://x.com/dkrajews123/status/2082919461980684360
- https://x.com/dkrajews123/status/2081078838537363754
- https://github.com/google-research/readout_guidance/pull/6
- https://github.com/kraj011?tab=repositories


Researched with Autumn (https://www.autumn.ai) from public sources. Updated 2026-11-04. Profile: https://www.autumn.ai/resources/cognition/people/david-krajewski · Everyone at Cognition: https://www.autumn.ai/resources/cognition/people