Mark is available for hire
Hire MarkMark Eschbach
Verified Expert in Engineering
Full-stack Developer
Location
Davis, CA, United States
Toptal Member Since
June 1, 2020
Mark is a polyglot all-stack engineer with experience from infrastructure to the UI. He loves building reliable and maintainable systems at a sustainable pace. Mark is a strong advocate for agile software practices beyond scrum, having implemented XP and Kanban with various teams. He's a versatile developer focused on building quality solutions.
Portfolio
WhiteSpace
Amazon Web Services (AWS), Terraform, Go, React, Node.js, GraphQL, Full-stack...
Emerlyn
Clojure, Java, Go, Terraform, Full-stack, Amazon Web Services (AWS)...
Virta Health
New Relic, PostgreSQL, Python, Node.js, Terraform, Amazon Web Services (AWS)...
Experience
Availability
Part-time
Preferred Environment
Kubernetes, Linux, JetBrains, MacOS
The most amazing...
...thing I've built was an operating system with a microkernel from scratch, using Objective-C.
Work Experience
Technical Principal
2020 - PRESENT
WhiteSpace
- Leading a large team to build out industrial-grade systems for streaming data analysis for identity matching. Oversaw the infrastructure from AWS up to DevXP, software lifecycle, and more.
- Consulting with multinational organizations to diagnose and remove technical, organizational, and social impediments to successful continuous delivery.
- Leading teams from the trenches to rapid prototype projects for various clients.
Technologies: Amazon Web Services (AWS), Terraform, Go, React, Node.js, GraphQL, Full-stack, Web Architecture, Microservices, Linux, JavaScript, Jenkins, PostgreSQL, Git, Vault, React Native, Hibernate, Next.js, HTML, CSS, Web Development, XML, CSV, Microsoft Excel, Front-end, MUI (Material UI), XPath, RDBMS, Minimum Viable Product (MVP), CI/CD Pipelines, DevOps, REST APIs, Celery, Troubleshooting, Python, Python 3, Lint, Machine Learning, Swagger, OpenAPI, SciPy, NumPy, Pandas, Jupyter, Jupyter Notebook, TensorFlow, Redux, RESTful Services, Software Design, Architecture, Leadership, Security, TypeScript, React Redux, GitHub, Server-side Rendering (SSR), AWS Lambda, Amazon EC2, Data Research, Data Scraping, Middleware, Jira, Full-stack Development, Algorithms
Lead Software Engineer
2019 - 2019
Emerlyn
- Led teams of up to seven developers and operational personnel, moving from a traditional NOC model to DevOps. Brought all teams into incident response procedures and processes.
- Instrumented then migrated from on-prem to AWS using EKS.
- Moved teams from cowboy project management into an XP agile system, defining software development lifecycle and related activities. Served as the project manager for several teams and supported others working as a project manager.
Technologies: Clojure, Java, Go, Terraform, Full-stack, Amazon Web Services (AWS), Web Architecture, Microservices, Linux, JavaScript, PostgreSQL, Git, Vault, Hibernate, HTML, CSS, Web Development, XML, CSV, Microsoft Excel, React, Front-end, .NET, Amazon RDS, RDBMS, Node.js, CI/CD Pipelines, DevOps, REST APIs, Troubleshooting, Python 3, Lint, Swagger, OpenAPI, Redux, RESTful Services, Software Design, Architecture, Leadership, SaaS, Security, TypeScript, React Redux, GitHub, Server-side Rendering (SSR), Amazon EC2, Data Research, Data Scraping, Middleware, Jira, Full-stack Development, Algorithms
Senior Site Reliability Engineer
2018 - 2019
Virta Health
- Designed and implemented a centralized computational platform based on Kubernetes, bringing in service maintained by the organization under the platform. Initially targeted AWS EKS, however, moved to GCP.
- Led the socializing and implementation of service level objectives across the entire company's software inventory, including finding teams responsible for each service.
- Designed and implemented a system to monitor and alert based on service level objectives and indicators against New Relic in Node.js.
- Built and delivered the incident management process, including in the moment, post mortem, monthly, quarterly, and yearly reviews. Supported teams at the time of incidents, identified trends, and improved processes based on feedback.
Technologies: New Relic, PostgreSQL, Python, Node.js, Terraform, Amazon Web Services (AWS), Web Architecture, Microservices, Linux, JavaScript, Git, Vault, Go, HTML, CSS, Kotlin, Web Development, XML, React, Front-end, MUI (Material UI), Django, XPath, RDBMS, Minimum Viable Product (MVP), Google Cloud Platform (GCP), CI/CD Pipelines, DevOps, REST APIs, Celery, Troubleshooting, Python 3, Lint, Swagger, OpenAPI, SciPy, NumPy, Pandas, Jupyter, Jupyter Notebook, Redux, RESTful Services, Software Design, Architecture, Leadership, SaaS, Security, TypeScript, React Redux, GitHub, Amazon EC2, Data Research, Middleware, Full-stack Development, Algorithms
Software Engineer
2016 - 2018
Rhumbix
- Instilled a culture of IaC plus a 24x7 system monitoring and incident response as the DevOps lead. Migrated systems from Heroku to AWS, becoming technically DoD CC SRG Level 2 compliant. Built on AWS ECS (Docker) providing zero-downtime deployments.
- Designed and built continuous integration (CI) and continuous delivery (CD) pipelines from Git through the entire app lifecycle.
- Brought in as a remote engineer to supplement application development efforts in Android, iOS, Django, and Node.js; backed by PostgreSQL. Converted an iOS application from Objective-C to Swift.
Technologies: Amazon Web Services (AWS), Firebase, PostgreSQL, Terraform, Heroku, iOS, Android, React, Ruby, Node.js, Python, Full-stack, Web Architecture, Linux, JavaScript, Git, Vault, React Native, HTML, CSS, Swift, Web Development, XML, CSV, Microsoft Excel, Front-end, MUI (Material UI), Django, Amazon RDS, RDBMS, Minimum Viable Product (MVP), CI/CD Pipelines, DevOps, REST APIs, Celery, Troubleshooting, Lint, Swagger, OpenAPI, SciPy, NumPy, Pandas, Jupyter, Jupyter Notebook, Redux, RESTful Services, Software Design, Architecture, Leadership, SaaS, Security, TypeScript, React Redux, GitHub, Server-side Rendering (SSR), Amazon EC2, Data Research, Data Scraping, Middleware, Jira, Full-stack Development, Algorithms
Senior Software Engineer
2015 - 2015
SkySlope
- Built out a secure digital signing platform's authentication and authorization system, including integration into the larger system.
- Brought in and instilled a culture of continuous integration, including implementing pipelines. Developed several gated deploys.
- Took over as lead for the mobile vertical, building out CI/CD pipelines.
Technologies: Cordova, Java, Android, Objective-C, iOS, AngularJS, Microsoft SQL Server, C#, Full-stack, Amazon Web Services (AWS), Web Architecture, Microservices, Linux, JavaScript, Jenkins, Git, HTML, CSS, MongoDB, Web Development, XML, CSV, Front-end, .NET, Amazon RDS, RDBMS, Node.js, CI/CD Pipelines, DevOps, REST APIs, Troubleshooting, Lint, Swagger, OpenAPI, RESTful Services, Software Design, Architecture, Leadership, SaaS, Security, GitHub, Server-side Rendering (SSR), Amazon EC2, Data Scraping, Middleware, Jira, Full-stack Development, Algorithms
Senior Data System Developer
2013 - 2014
CoreLogic
- Built ETL tools allowing analysts to verify large datasets (30+ GB) using programmable distributed computation before being loaded into data warehouses.
- Optimized computational complexity (speed + time) and development time in the business logic engine applied against incoming data sets. Reduced the total execution time by 20%, while reducing time to implement new rulesets by 80%.
- Improved the developer experience by introducing (new to them) tools like Git and Docker.
Technologies: Subversion (SVN), Docker, Linux, SSH, RMI, Spring MVC, Spring, C++, Java, Full-stack, JavaScript, MySQL, Hibernate, Go, HTML, CSS, Web Development, XML, CSV, Microsoft Excel, Front-end, XPath, RDBMS, Node.js, CI/CD Pipelines, REST APIs, Troubleshooting, Lint, RESTful Services, Software Design, Architecture, Leadership, JSX, Server-side Rendering (SSR), Data Scraping, Middleware, Jira, Algorithms
Software Engineer
2012 - 2013
StreamSend
- Built an analytics system for tracking e-mail marketing performance across organizations, written in Ruby on Rails.
- Optimized an existing feature flagging system to greatly reduce computational and space complexity. Gained a 6% improvement across the entire system.
- Developed a prototype system in Scala + Akka backed by Cassandra to replace a Ruby on Rails legacy.
Technologies: Ruby on Rails (RoR), PostgreSQL, Akka, Scala, Java, Ruby, Full-stack, Web Architecture, Microservices, Linux, JavaScript, Jenkins, Git, Grails, MySQL, Hibernate, HTML, CSS, PHP, Web Development, XML, CSV, Microsoft Excel, Front-end, XPath, RDBMS, CI/CD Pipelines, DevOps, REST APIs, Troubleshooting, Lint, RESTful Services, Software Design, Architecture, Leadership, SaaS, Security, GitHub, Server-side Rendering (SSR), Data Scraping, Middleware, Jira, Full-stack Development, Algorithms
Software Engineer IV
2011 - 2012
LexisNexis
- Converted a build system from Ant to Maven. Helped to improve CI practices across the organization.
- Implemented a set of Ajax/SPA-like components in Wicket to meet a Web2.0 feel, including building custom bridges into JSP and JSF legacy code.
- Built a business logic engine based on Drools to be applied to the business domain, able to run at multiple stages and lifecycles of the application.
Technologies: REST, RMI, Apache Wicket, Spring MVC, Spring, Java, Full-stack, Web Architecture, JavaScript, Jenkins, Hibernate, HTML, CSS, Web Development, XML, CSV, Front-end, RDBMS, CI/CD Pipelines, REST APIs, Troubleshooting, Lint, RESTful Services, Software Design, Architecture, Leadership, SaaS, JSX, Server-side Rendering (SSR), Middleware, Jira, Algorithms
Java Developer
2011 - 2011
Eyefinity
- Built a production system from a proof of concept for a small team.
- Advocated best practices for building systems resulting in a reduction of build times to one third.
- Reduced QA man-hour efforts by 20% with automated acceptance tests.
Technologies: jQuery, Backbone.js, Spring MVC, Spring, Java, Full-stack, Web Architecture, JavaScript, Jenkins, Git, Grails, MySQL, Hibernate, HTML, CSS, Web Development, XML, CSV, Front-end, RDBMS, DevOps, REST APIs, Troubleshooting, Lint, RESTful Services, Software Design, Architecture, Leadership, SaaS, Security, JSX, Server-side Rendering (SSR), Middleware, Jira, Full-stack Development, Algorithms
Experience
Irrigation
https://github.com/meschbach/irrigationAn HTTP reverse proxy written in Node.js emphasizing dynamic configuration and high throughput to target services. Includes a rest control interface optionally with request authorization via JWTs. Supports both plaintext and TLS HTTP sockets. Distributed via git or Docker images.
Skills
Languages
JavaScript, Python, TypeScript, Go, HTML, CSS, Java, Ruby, C, C++, Objective-C, GraphQL, PHP, Kotlin, XML, XPath, Python 3, Swift, C#, Clojure, Scala
Frameworks
Next.js, Express.js, Spring, MUI (Material UI), Django, .NET, Swagger, Redux, Ruby on Rails (RoR), AngularJS, Spring Boot, Spring MVC, Akka, Apache Wicket, React Native, Grails, Hibernate
Libraries/APIs
React, Node.js, REST APIs, OpenAPI, React Redux, jQuery, Protobuf, Backbone.js, SciPy, NumPy, Pandas, TensorFlow
Tools
Terraform, GitHub, Jira, Vault, Jenkins, Git, Mocha, Microsoft Excel, Celery, JSX, JetBrains, Subversion (SVN), Jupyter
Paradigms
REST, Web Architecture, Microservices, DevOps, Extreme Programming, Scrum, Kanban
Platforms
Docker, Amazon Web Services (AWS), Amazon EC2, Kubernetes, Linux, Android, iOS, Google Cloud Platform (GCP), MacOS, New Relic, Heroku, Firebase, Jupyter Notebook, AWS Lambda
Storage
PostgreSQL, RDBMS, MySQL, CouchDB, Elasticsearch, MongoDB, Microsoft SQL Server
Industry Expertise
Security
Other
Full-stack, Front-end, Minimum Viable Product (MVP), CI/CD Pipelines, Troubleshooting, Lint, Software Design, Architecture, Leadership, SaaS, Server-side Rendering (SSR), Middleware, Full-stack Development, Technical Leadership, People Management, Amazon RDS, Data Research, Data Scraping, Algorithms, Consul, Apollo, Cordova, RMI, SSH, Web Development, CSV, Machine Learning, RESTful Services
Education
2006 - 2008
Coursework in Computer Information Science and Business
Sacramento City College - Sacramento, CA
Certifications
APRIL 2018 - PRESENT
Woodbadge Beads
Boy Scouts of America