# David Leonhardt

> Senior Software Engineer @ Seal Storage

Location: Greater Seattle Area, United States
Profile: https://flows.cv/davidleonhardt

As a Senior Software Engineer at Tractiv, I led the design and development of the backend stack and structure, using Node.js, GoLang, and AWS technologies. I built file encryption flows, an immutable ledger, and an internal load/connection balancer for our immutable data store, translating shareholder wants and needs into architectural features.

I have a certificate in Full Stack Web Development from Galvanize - Boulder, West Pearl, where I learned how to build web applications using various frameworks and languages. I also have experience as a Full Stack Developer at Ideas By Nature, where I built blockchain monitoring and validation solutions for clients, using TypeScript, Kotlin, and Postgres. I am passionate about solving difficult problems and teaching others, as I demonstrated by volunteering as an Alexa Development Clinic Teacher.

## Work Experience
### Senior Software Engineer @ Seal Storage Technology
Jan 2024 – Present
• Developed event-driven services using Golang and NATS Jetstream to enhance file upload connectivity.  
• Automated CAR file generation for sealing on the FileCoin Network, improving operational efficiency.  
• Designed technical architecture to foster collaboration among C-suite, SRE teams, and project managers.

### Senior Software Engineer @ Tractiv
Jan 2020 – Jan 2024
• Lead designer of Tractiv's initial backend stack and structure. 
• Built file encryption flows with Node.js and AWS S3. 
• Built our immutable ledger with GoLang as well as an internal load/connection balancer for our immutable data store. 
• Translated shareholder wants and needs into architectural design and features. 
• Mentored developers in both TypeScript and GoLang.

### Full Stack Developer @ Ideas By Nature
Jan 2018 – Jan 2020
• Worked on projects for early stage startups taking them from ground zero to fully fledged products
• Built core tools for use in blockchain monitoring for multiple of our clients
* Worked with product to advise potential clients on how we could help them reach their technical goals

𝗣𝗿𝗼𝗷𝗲𝗰𝘁𝘀:

• EquaStartProject
  - Developed a TypeScript API with a complex permission structure and payment processing
  - Migrated a production Mongo database to AWS RDS Postgres instance
  - Used Microsoft Sharepoint and AWS S3 for permissioned storage of legal documents

• AmadeusProject
  - Architected the micro-service structure to support a Swift chatbot application
  - Built and deployed a Node.js/TypeScript web-server to EC2
  - Reviewed and tested pull requests before merging to production

• MinotaurProject
  - Built a Kotlin/Typescript blockchain monitor that parsed and stored blockchain data
  - Optimized our Postgres database by indexing and creating SQL views
  - Monitored and debugged our EC2 and RDS instances both manually and with Datadog

• PandoProject
  - Built a private blockchain technology and JavaFX ledger application with Kotlin
  - Worked to design an "opt-in" trustless system similar to IBM's Hyperledger Fabric
  - Used SQLite for the desktop application and Postgres for the blockchain nodes data

### Alexa Development Clinic Teacher @ Volunteer
Jan 2017 – Jan 2017 | Boulder, CO
Learned how to instruct others in Alexa Development from Amazon. Was responsible for teaching three 6 hour Alexa development courses that introduced the concept of a Voice User Interface or VUI, writing code in a language of the students choosing to interact with Amazon's voice processing API, and deploying the application as serverless Lamda function.

### Web Development Immersive @ Galvanize - Boulder, West Pearl
Jan 2017 – Jan 2017 | Boulder Colorado
Graduated in the g49 Cohort with over 1000 course hours of both learning and building with Node.js, React, React Native, AngularJS, Postgres, and more.

### Operations Manager @ BVH
Jan 2015 – Jan 2017 | Boulder, CO
Purchased products based upon sales trends, kept track of inventory by creating a inventory count schedule,  and provided tech support for the management team. 

Installed AvertX Camera systems, managed our Lightspeed POS system, worked with Zoho CRM, Zoho Books, and Zoho Reports, sent out POs handled invoices, established and maintained wholesale relationships, created daily schedules for sales associates, ran end of year inventory counts, ran employee meetings, and helped with hiring.

### Sales @ Moosejaw Mountaineering
Jan 2014 – Jan 2015 | Boulder, CO
Was responsible for accurately packing and shipping online orders from the warehouse, making transfer requests from other stores, and selling mountaineering equipment to customers.

Was a part of our stores highest recorded day of sales. Worked our booth at climbing and mountaineering events.


## Education
### Certificate in Full Stack Web Development
Galvanize - Boulder, West Pearl
Jan 2017 – Jan 2017


## Contact & Social
- LinkedIn: https://linkedin.com/in/dwleonhardt
- Website: https://david-leonhardt.surge.sh/

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Source: https://flows.cv/davidleonhardt
JSON Resume: https://flows.cv/davidleonhardt/resume.json
Last updated: 2026-03-22