Principal Engineer
YapStone, Inc
Drogheda, Co. Louth, Ireland
2 months ago


At YapStone, we approach payments with the same startup mentality that we had when we launched our first payment solution in 1999.

We are now focused on combining our entrepreneurial spirit with our immense payment expertise to take our company and our partners to the forefront of innovation.

As one of the leading payment companies, YapStone is continually searching for passionate thinkers to join us in changing how the world pays.

The role of Principal Software Engineer for Core Services is to design, develop, and release innovative foundational Java service capabilities and services that will be the building blocks of YapStone’s technology solutions.

You will help enable us to deliver a globally scalable, secure, performant, and configurable unified platform to bring electronic payments to new and existing markets.

This is a high impact role with the opportunity to make significant contributions to the time to market, scalability, performance, and maintainability of leading-

edge digital payments platform services.

We believe in innovation, collaboration, and accountability. As part of the team you will be responsible for the functionality, quality, and ultimate success of the pieces the team delivers.

Position duties and responsibilities


  • Serve as main contributor in the design, development and deployment of significant new Big Data capabilities
  • Own and drive key architectural decisions and design considerations across teams
  • Research and recommend technology selections as well as provide technical guidance to 3rd party integrations
  • Monitor and plan out core infrastructure enhancements
  • Troubleshoot and resolve system problems and client issues
  • Lead programs and exert technical influence over multiple teams, increasing their productivity and effectiveness by providing consistent technical direction and sharing your deep knowledge and experience
  • Actively mentor individuals and promote best practices across design, build, and test
  • Perform architecture, capacity planning, monitoring, maintenance, tuning and workload management of all key services to ensure that the systems meet SLAs.
  • Reporting

  • Providing prompt and appropriate project, vendor, and client reporting information to the Software Engineering Manager.
  • General

  • Undertaking professional development to maintain skills and knowledge in areas of technical expertise.
  • Qualifications and experience

    Professional experience

  • 10+ years of relevant technical experience.
  • Experience with object-oriented design, coding and testing patterns
  • Experience in engineering (commercial or open source) software platforms and large-scale data infrastructures
  • Successfully delivered highly scalable distributed systems, using open source tools.
  • Broad engineering experience and proven track record in the e-commerce and payments space
  • Thought leader, hands-on contributor, and decision maker known for solving difficult software engineering problems
  • Required Skills

  • Extensive knowledge with Hadoop based technologies such as MapReduce, Hive, MongoDB or Cassandra
  • Extensive knowledge in different programming or scripting languages such as Java, Perl, Python and Ruby
  • Expert knowledge in NoSQL and RDBMS databases (Couchbase and SQL Server preferred)
  • Experience in the Payments or high transactional processes
  • Excellent verbal and written communication skills
  • Qualifications

    The candidate must possess a Bachelor’s Degree in Computer Science or related field.


    Fluent in English. A 2nd European Language would be advantageous.

    Our Mission

    Changing how the world pays is a mission that inspires us daily. It gets us up in the morning and keeps us up at night. And just in case we need an extra dose of inspiration during the day, our team can take in the stellar view from our Drogheda office or visit the Yappucino Café to choose from a large selection of snacks.

    From comprehensive health insurance to gym memberships, you’ll find plenty of benefits and perks that reflect our appreciation for all of the thinking and doing that goes on at YapStone.

    About YapStone

    YapStone is a global provider of full-stack payment solutions for global marketplaces and large vertical markets. YapStone powers online and mobile payments for HomeAway®, VRBO®, and thousands of apartment and vacation rental companies, homeowners’ associations, self-

    storage companies, hospitality establishments and non-profits. YapStone processes over $17B in payment volume annually and has been recognized for its growth, ranking on the Inc.

    5000 list of Fastest-Growing Private Companies for eight consecutive years and named to the Forbes’ List of America’s Most Promising Companies in 2015.

    YapStone has raised over $110 million from investors including Accel Partners, Meritech Capital and Bregal Sagemount. YapStone is headquartered in the San Francisco Bay area with additional offices in Santa Monica, California and Ireland.

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