Daniel Zajic Email & Phone Number

Boston, Massachusetts, Us

Boston, Massachusetts, Us

Helping to push the state of the art in obesity telehealth at an early stage startup; working on a very small but high performing team that moves quickly and safely.- Ruby on Rails back-end and clinical tools- React components where needed- TailwindCSS- GraphQL (Apollo Server) via AWS Lambda- Cypress E2E testing- integrating SaaS for heavy lifting (e.g. Customer.io, Sendbird, Contentful, Cronofy, Zoom, Elation, Dockhealth)- extensive monitoring and logging (Honeycomb, Scout APM, Bugsnag, LogDNA)- analytics (Segment, Redash)- feature flags for all user-facing changes (LaunchDarkly)- HIPAA compliance, data security processes

Washington, District Of Columbia, Us

Day-to-day:- maintain and extend both mature and new Rails APIs in a SOA- APIs consumed by internal apps, SPAs and external clients- technologies: Ruby, Rails, MySQL, Postgres, Amazon SNS/SQS- participate in architectural decisionsChallenges: - balancing customer priorities and company growth with the need to do significant refactoring in a legacy codebase- simultaneously being both bold and conservativeActing as a force multiplier:- mentoring junior and less experienced Rails developers- suggesting improvements to team processes and coding standards as needed- challenging the status quo

San Francisco, Ca, Us

- full-stack Ruby on Rails, Vue.js, GraphQL, MySQL, Backbone.js, ElasticSearch- large/mature mostly monolithic application continually being split out into many smaller apps

- e-commerce web application for a large company- Rails 3.x/4.x app with engines, 100s of gems and 1000s of tests, dozens of Git repos- 20-25 Rails developers on the team, 120+ people total- quality code was top priority- extensive code reviews for all work- dealing with banking security

- Back-end development for daily-deal/coupon platform provider.- Required familiarity with all areas of a mature application with many moving parts.- Shared responsibility for deployment, monitoring/alerting, client-interaction, requirements analysis, etc.- Team of ~10 highly skilled engineers.- 50% of time spent pairing, mostly co-located, but sometimes remote via screensharing.

Portland, Oregon, Us

- Early-stage application development for brand-new wellness platform to be released April 2011.- Brought on as a Rails expert to transition Java developers and ensure best practices would be followed.- Lead developer of API to be used by companion iPhone application.

- Designed and developed a custom web application to support all aspects of the business.- Web app powered 7 public-facing websites (5 retail, 1 financing and 1 purchasing) and a backend administrative application to manage inventory, licensees, reporting, marketing, sales, purchasing, etc.- Full life-cycle development, including server setup/administration, source code versioning, scheduled backups, performance monitoring, etc.- Created many tools to improve efficiency and facilitate innovation, new initiatives.

*** Won Grand Prize in Michelle Obama’s “Apps for Health Kids” competition. ***- Early-stage application development for startup company.- Migrated application to cloud-based services (Heroku, S3).- Implemented multimedia features using JavaScript/jQuery (sound effects, Flash animation).- Managed Git repository and handled staging, deployment and system administration.- Used Unfuddle for issue tracking and time management.

- Developed web application for YourGenie, a venture capital-backed startup e-business.- Worked with 2 other developers in a small, distributed team environment.- Customized ElasticPath framework to meet project requirements.- Worked with Java J2EE (Jakarta Struts/Velocity, Hibernate, Tomcat) and MySQL 5.- Converted business mockups into functional web application components. - Integrated e-commerce (Verisign) and shipping management (UPS) solutions.

- LAMP/Rails developer (startup project, unpaid)- Co-developed web application using LAMP (Perl Catalyst) and later converted to RoR.

- Developed web applications for Decorative Product Source (faucet.com) and Vintage Arte (vintagearte.com)- Worked with 2 other developers and a project manager in a small, distributed team environment.- Developed a scalable, customizable web application framework to support business processes including web sales, inventory management, account auditing/reporting, vendor interaction, etc.- Integrated websites with e-commerce solutions (Verisign, Cybersource)- Wrote custom search to query a large database of products sorting results by relevance.- Developed custom authentication/authorization to precisely control user permissions.- Administered multiple Linux servers to support development/deployment.

- Developed custom CMS to drive a proprietary recipe content module for grocery chain websites, and the in-house/flagship website, MealsForYou.com.- Worked with 2-3 other developers in a small team environment.- Managed all daily operations, including system administration,

Master Of Science, Computer Science

Bachelor Of Science, Computer Science; Mathematics