Arena Solutions provides on-demand software to help small and mid-size manufacturers manage their complex and constantly changing product record. Arenas informal, team-based company culture provides a great environment to showcase your talent and skills. We embrace Agile development methodologies to make the development process open, collaborative and fun. Arena, our hosted multi-tenant Software as a Service (SaaS) application, is backed by an Oracle database. The Principal Database Engineer is expected to provide mentorship to other database developers and work closely with our database and systems teams to design and develop new product functionality, consider performance as a feature, and guide the ongoing evolution of Arenas production database PL/SQL codebase.Responsibilities Design and implement data models and data access layer for new product functionality Write and tune SQL queries for performance and scalability Make significant contributions to application design and architecture. Work closely with other members of the development team on design and implementation of new infrastructure Work closely with Product Management on requirements and design of new product functionality Guide and mentor other team members in efficient database design, data modeling and PL/SQL programmingRequired skills and experience: Must have experience in building high availability applications on Oracle 11g/10g that process large numbers of transactions. Note: Candidates with their primary experience in Data Warehousing applications will not be considered. Expert level knowledge of PL/SQL and code optimization Experience with performance tuning, tkprof and query optimization Strong verbal and written communication skills with the ability to clearly articulate complex technical issues.Desired skills and experience: Experience developing hosted, highly available, multi-tenant applications. Experience implementing efficient and effective search algorithms Experience with ER Diagramming tools, iBatis or other Object-relational mapping tools Ten plus years experience in software development and databasesEducation BS or MS in Computer Science or closely related field