Daniel Guffey Email & Phone Number

Saint Paul, Mn, Us

Saint Paul, Mn, Us

In this role I am responsible for bootstrapping the IT presence for LHA. I have established mission critical databases, maintenance and administration APIs and UIs, updated contracts and intake forms utilizing e-signatures, and coordinated with other contractors on maintenance and restoration projects.I have designed and developed databases to track ticketing, finances, resources, contacts, notes, and maintenance issues. These databases were designed using Python, Pydantic, SQLModel, FastAPI, AWS CDK, DynamoDB, Lambda, and Lombok. Development utilizes Docker images to standardize development and runtime solutions.I am currently designing an agent based conflict resolution platform using Python, React, JS, CSS, LangChain, MCP Servers, while using Claude AI and ChatGPT agent backends.

St Paul, Minnesota, Us

In this role, I helped bootstrap an AWS IoT core solution storing time-series metrics in a timescale database.The energy meter devices securely published data over MQTT into an AWS IoT broker. The new stack utilized Gitlab CI/CD secured pipelines to deploy Terraform defined resources and logic into AWS through a secured VPC endpoint. Backend logic is strongly typed Pydantic models that AWS Lambda and API GW solutions handle. Customer management is handled through CRUD API endpoints and Cognito Pools.

El Segundo, Ca, Us

In my role as Senior Software Architect at DirecTV, I led the onboarding of teams and applications, offering consultation, auditing, and approval services during system design planning, implementation, and integration activities. I reported to the SecDevOps and Governance teams, focusing on both on-premise and AWS-based solutions.My responsibilities encompassed implementing AWS solutions using CDKv2, with a Python backend for supporting DirecTV's AWS-based streaming platform. I utilized Agile and Scrum methodologies to design and deploy backend solutions, leveraging AWS SDK code, notably Boto3. I was also in charge of CI/CD pipeline deployments, code reviews, and Bitbucket-based git management.I spearheaded CDK-based IaC development where I established and promoted many best design practices, nested stacks, and constructs for reuse as well as company compliance standards such as tagging and default service policies.I extensively used AWS services, creating solutions that incorporated Lambda, EC2, and Fargate for an automation framework for tooling, used by other systems such as a fully automated secrets management system, Ansible, Tower, and AWS Service Catalog. I managed AMI container images, SSM software patching, IAM authentication management, VPC connectivity, and Kinesis pipeline-driven telemetry for DirecTV's consumer set-top box and IoT product, Osprey.For security, I managed access permissions, evaluated internal and external security risks, and dealt with intrusion detection. I oversaw organizational structures including service delegation and administration, permission sets, and budgeting, and made design and configuration decisions for various AWS-based services including, but not limited to, Kinesis, IoT, S3, IAM, Lambda, X-Ray, SES, SQS, SNS, Organizations, ControlTower, Security Hub, Guardduty, Cloudtrail, Cloudwatch, EC2, Cloudformation, CodePipeline, Cognito, Config, EKS, ECR, and DynamoDB.

I developed a project plan for identifying and encoding cell markers into a data warehouse for training, managed converting requirements between technical and scientific departments, and established a workflow to feed data into a pipeline for identifying the potency and behavior of oocyte extracts on cells.Additionally, I developed a framework to automate the tracking, logging, execution of data producers and consumers for batch training jobs. I also designed and started development for an end-to-end data science pipeline using Terraform IaC triggered by commit hooks to GitHub Actions to AWS. This pipeline formed Kubernetes managed Docker clusters for Tensorflow collaboration.Furthermore, I developed Python3.8 code for Vue SPAs using Flask to provide API interfaces back to source logic, data visualizations for dashboarding, and analysis using Python. I also developed Python3.9 code generators and decorators to reduce boilerplate needed to prepare Python for production environments including logging, documentation, dashboarding, performance, and tracing.

Seattle, Wa, Us

During my time at AWS, I developed an AMI-based video game container management systems to automatically create, manage, and deploy the resources necessary for developing video game servers, and client software. These systems are self-healing and will automatically archive logs, identify health issues, self-terminate when unhealthy, then automatically re-deploy and provide rollback capability to the second for crash recovery.The resources are managed through CloudFormation templates and deployed through secured CD/CI pipelines to EC2 systems with CodeDeploy. Functionality is implemented using a combination of technologies including Java, Python3, Bash (Unix Admin), PowerShell (Windows Admin), DynamoDB, Incognito Pools, S3, PostgreSQL, and Lambda.

Seattle, Wa, Us

Amazon is a conglomerate that specializes in designing, implementing, and improving on scalable business practices. Teams in Amazon are considered semi-autonomous and are able to design and set their own processes and service level agreements. As part of our processes, we utilized AWS, Kanban and Scrum, to plan, develop, and execute worldwide.

Seattle, Wa, Us

During my time at Amazon Fresh, I contributed to the development of an ML productionization system on AWS, which automated various tasks such as hosting, sanitizing, training, prediction, continuous feedback, metrics, logging, dashboarding, and post-prediction validation for exogenous factors.The system used customer data, with a sparse matrix Tensorflow-based recommendation network to suggest related and relevant products this enhanced customer experience and organizational profitability.I designed and implemented optimizations on Amazon's NoSQL syndication database responsible for processing billions of transactions yielding $960,000 in annual AWS cost savings.During on-call operational support and global product launches, I performed site reliability engineer duties to address company-critical issues in real-time while reporting to management on promotions and rollbacks across fleets.Created a fully automated back-end system to monitor customer shipping charges for errors and automatically refund customers upon detecting errors, with CI/CD pipeline handling dependency patching, testing, promotion, and deployment.In collaboration with product owners, designed and developed the user registration workflow and pages, ensuring technical feasibility.Conducted full application certifications, covering design, documentation, security, support, scope, dependency charts, support, and fallback plans.Developed pages and workflows for Amazon Fresh using Tomcat, Java Spring, JavaScript, REST, CSS, and Perl, onboarded and integrated directly to Amazon.com homepage, Established database hosting, client connection code, schemas, shopping cart backend logic, delivery promise logic, and inventory availability validation pages and was responsible for the testing and validation of these pages.

Phoenix, Az, Us

Performance Software is a company that specializes in real-time safety-critical systems. This includes but is not limited to aerospace, medical devices, and energy systems. As a part of this specialty, we would work with companies facing project planning, staffing, certification, and schedule issues to help them get back on track by taking over the entire development life cycle of different functional areas of a system.

Phoenix, Az, Us

Designed Perl interface tests for structural and logical coverage of satellite communications softwareWorked with system configuration information to design test scenarios for data operating over A429 and MIL-STD-1553 protocols.

Cedar Rapids, Iowa, Us

Data mining source code, requirement text, test scripts and wrote software to analyze data in order to determine areas of software reuse between different product lines.Created software to perform tracing analysis between requirements and test code to determine coverage given test log results.Created software to perform statistical analysis on test logs from a server farm in order to automatically generate status and progress reporting.

Nuremberg, Bavaria, De

Created and trained team to use a Python platform that used metaprogramming to recurse automatically through irreversible logic gates to generate initial states for complete combination testing coverage.Derived customer requirements into a design then implemented a system utilizing ARINC 664 IO management utilizing: SNMP and ABD standardsIntegrated source from interface control document (ICD) to message management, and load balancingTested complete system from control laws to reporting tasks using a soft-time system requiring an approximated real-time analysisAssisted in Microsoft Project planningIdentified thousands of lines of dead and unoptimized code and dozens of files from the project that could be safely removed saving millions in testing costs and improving performance by over 30% on a real-time implementation verified using oscilloscope leads.Created division and multiplication functions in assembly and C conforming to floating-point standardsDeveloped a new messaging platform that automated message timing, scheduling, drift, and simplified consumer implementation considerably while removing hard coded scheduling implementation.

Charlotte, North Carolina, Us

The project used Agile development, with UML diagrams generated into C++ sources and reverse-engineered from modificationsDesigned a software layer for system critical discrete and analog IO devices and a VM interface that allowed development prior to prototypes being availableConfigured and performed verification over continuous integration and was part of the first team to integrate software onto fabricated hardwareUtilized unit test-based development along with customer-driven object-oriented analysis following DO178-B

Cedar Rapids, Iowa, Us

Performed reviews of airplane leg calculations to prepare for the certification process.Due to access limitations created a capable code review process only utilizing Excel due tocustomer access and software constraintsImprovements over the prior review process allowed for clear line by line analysis generatingmore detailed comments that led to the identification of hidden bugs

Charlotte, North Carolina, Us

Designed a periodic, interface free, NVM system where system critical data would get identified and saved automatically without requiring each functional area to learn an additional interface. This process provided secure backup across multiple functional software platforms using a generic data structureCreated a build and data loading framework utilizing Make and Python scripts to dynamically generate customized builds based on input dataCreated A615A loadable software airplane part (LSAP) images for a loadable software platform Utilized Airsim to assist with the development of multiple redundant system synchronizationPerformed cockpit hardware-software integration checkouts, bug replication, and code fixes for the existing system.Updated and tested code utilizing an object-oriented analysis and design-oriented process for highly complex module inheritance structureDeveloped a parsing library to automatically filter, color, debounce and sort hardware input

Cincinnati, Oh, Us

Wrote and tested a consolidation fault reporting system that communicates across a CDN, AFDX, A429, and RDC networks.Implemented validation, fault and data management, configuration management and reporting, health management, time management, BIT and BITE testing, and maintenance managementImplemented bit-oriented protocol, using C/AdaDesigned and implemented a virtualized VxWorks OS threaded real-time simulator. Simulating this environment reduced run times, increased development speed and quality, and eliminated proprietary hardware restrictions saving thousands of man-hoursCreated a black-box testing framework for periodic and aperiodic messaging that provided message construction, scheduling, and verification features.Designed a tool to automate and generate manual tests, XML configuration, parse test requirements, and design a dynamic scenario configuration.Designed an API used to create an automatic Dimensions PVCS reporting analysis task tool and an automated gdb script debugger interface that maps functional sections of code to usable breakpointsDuring formal reviews, identified and trained responsible team members in necessary tasks for long term maintenance while maintaining low-level compatibility checks between hardware platforms and maintained a culture of reusabilityLearned the VxWorks 653 system and created a kernel development build responsible for testing on a SBCWrote white-box tests to verify base hardware functionality and driver code coverage using Perl & CSynchronized source management across multiple versioning tools during transitions. Moved company away from SourceSafe to CVS and then SVN management while providing training, rollout, and administration

Biomathematics, Bioinformatics, And Computational Biology

Bachelor Of Science - Bs, Computer Science