Ken Roe
Verified Expert in Engineering
Mobile Developer
Ken is a highly skilled mobile app developer and software engineer with over twenty years of experience. He has been running a small company that develops and sells mobile apps, and he is especially good at Python, Objective-C, Android, and Swift. He holds a Ph.D. in computer science from Johns Hopkins University.
Portfolio
Experience
Availability
Preferred Environment
Android Studio, Vi, Xcode
The most amazing...
...product I've developed is an iOS app, Smart Recorder, which has been installed on over a million iOS devices.
Work Experience
CEO
Roe Mobile Development
- Developed and published an audio recorder app (Smart Recorder for iOS) from scratch. Smart Recorder makes extensive use of the various audio APIs in iOS including AudioToolbox and the creation of Audio graphs. The app has 1,000,000 device installs and over 100,000 users. This project gave me experience building and maintaining a commercial quality app.
- Developed PHP/MySQL code for a transcription service server. This tool accepted RESTful requests from the Smart Recorder app, maintained a database of customer account information, and forwarded requests to the Amazon Mechanical Turks service for processing.
- Managed the development and publication of an Android port of the Smart Recorder product (over a period of about a year).
- Developed and published several other iOS apps including Smart Swipe Keyboard, Travel Diary, Transylvania, The Nuclear Test, and Word Quiz.
- Developed and published a port of Smart Recorder to Windows 8 written in C++ and XAML.
- Developed and published a port of Smart Recorder for Windows phone using C#, C++, and XAML.
Staff Software Engineer
SiFive
- Developed Coq framework for proof by reflection. This speed up rewriting operations.
- Developed methodologies and best practices for completing large proofs in the Coq theorem prover.
- Developed well founded proof for ProcKami processor.
- Contributed to the following open source repositories:. https://github.com/sifive/RiscvSpecFormal. https://github.com/sifive/Kami. https://github.com/sifive/ProcKami.
Android Engineer
RYOT (Verizon, via Toptal)
- Developed a viewer for H264 video stream.
Software Engineer/Biomedical Data Scientist
The Johns Hopkins University
- Developed a Python script (using Pandas and NumPy) that generates statistical summaries from medical records.
- Developed two medical web apps using PHP, Bootstrap, and JavaScript.
- Used machine learning to detect relationships in medical data and to predict the effectiveness of different treatments, mostly using Python and sklearn.
Ph.D. Candidate
Johns Hopkins University
- Developed a framework within the Coq theorem prover for verifying imperative programs written in a language such as C.
- Developed a GUI front end (using Python) for developing theorems using the Coq theorem prover.
- Taught students about Prolog, SAT solvers, and various other constraint solving systems as TA for a declarative methods class.
- Taught students as TA for an introductory Android class.
- Developed the IPC 3 iOS app under a contract with the JHU medical center.
- Developed an educational iOS app for the neurology department.
iOS/Android Developer
TMSoft
- Added iOS 9 search support for White Noise 6.0.
- Fixed a number of bugs required to make the Android release of WhiteNoise 6.0.
- Added audio to the chatter view in both the iOS and Android White Noise Market apps.
- Redesigned the settings page in both the iOS and Android White Noise Market apps.
- Localized both the iOS and Android versions of WhiteNoise.
iOS Developer
Tickets to the City (via Toptal)
- Developed an iOS app for scanning ticket barcodes and sending the results to a server.
Developer
Nimbot
- Developed a simple PHP/JavaScript website to automatically fill in blanks in hospital consent forms.
iOS Developer
Salon Swipe (via Toptal)
- Developed iPhone screens for a redesigned user interface.
- Fixed critical bugs in audio processing from a credit card swiping device.
iOS Developer
Zarquon (via Toptal)
- Refined a custom keyboard layout for iOS.
- Fleshed out all variants of the keyboard (ASCII, URL, Twitter, etc.).
- Added iPad layouts.
- Refined the layout algorithm.
- Integrated an in-app purchase library.
- Developed a container app with collection view and search bar.
- Integrated a library for key pop-ups and tap-and-hold functionality.
Contract Developer
Spensa Technologies (via Toptal)
- Developed an iOS app for deploying a network of bug zappers (on a farm).
- Refined a library for RESTful server communication.
Contractor
Independent Security Evaluators
- Ported a key security product from Windows/Linux to Mac.
Teaching Assistant
Johns Hopkins University
- Supervised student Android projects for an Android development course.
- Gave an occasional lecture during the execution of the course.
- Held regular office hours to answer student questions.
Contractor
TalkingTag
- Developed a low vision version of the talking product.
- Added many enhancements to improve the performance of the Talking Tag iOS app and integration with Flurry analytics.
Contractor
Cryptite, LLC
- Developed a prototype iOS scanner app for color bar codes and tools to encrypt files based on the bar codes.
MTS 4
NetApp
- Developed many sections of documentation for a Common Criteria EAL 4 cert.
- Fixed many bugs in the Datafort product. This involved FreeBSD Kernel level coding from which I have extensive experience with networking protocols such as CIFS and LDAP as well as C coding.
- Developed enhancements to the Datafort configuration tools to handle multiple input/output ethernet ports.
- Developed documentation to help other engineers get up to speed with the Datafort development enviornment.
Developer
Independent
- Developed an SMT solver (the heuristic theorem prover) in C. This tool went on to take a second and third place at SMT-Comp'06.
Experience
Smart Recorder
Smart Recorder also features a transcription service that converts voice to text.
Clinical Profiles
Denim
Smart Swipe Keyboard
Transylvania
Ipc3
CoqPIE IDE for Coq and PEDANTIC Static Analysis Model
http://www.cs.jhu.edu/~roePEDANTIC is a Coq framework I am developing to model the behavior of imperative programs.
Both these projects will form key pieces of my Ph.D. thesis.
Skills
Languages
Objective-C, C, HTML5, Python, Tcl, Java, Prolog, C#, ML Programming Language, C++, Coq, Tcl/Tk, Swift, Kotlin, PHP, SQL, JavaScript
Libraries/APIs
jQuery, Tk, Scikit-learn, Pandas, NumPy, OpenSSL, OpenCV, NDK, FFmpeg
Paradigms
App Development, Mobile Development, Functional Programming, Concurrent Programming, RISC-V
Platforms
MacOS, iOS, Android, Windows Mobile, FreeBSD, Linux, Windows, Amazon Web Services (AWS)
Other
CTO, Software Development, Front-end Development, Machine Learning, Encryption, Common Internet File System (CIFS), FTP, NFS, Virtual Router Redundancy Protocol (VRRP), Vi, AVFoundation, Video Streaming, Augmented Reality (AR), MediaCodec, H264
Tools
Adobe Photoshop, Adobe Illustrator, Wireshark, Git, Xcode, Android Studio, MATLAB, Android NDK
Frameworks
Core Data, Unreal Engine, Qt
Storage
MySQL
Education
Ph.D. in Computer Science
The Johns Hopkins University - Baltimore, MD
Master of Science Degree in Computer Science
University of Illinois - Urbana-Champaign, IL
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