Dharmarus Rizal Email & Phone Number

San Jose, Ca, Us

Campbell, Ca, Us

• Mainly responsible for scalable distributed architecture of ChargePoint global cloud software services that are used daily by millions of EV drivers and charging devices in North America and Europe.• Architect and develop MapCache distributed server clusters that serve millions per hour queries from mobile apps (Android and iOS), car apps (Android Auto and CarPlay), web browsers (https://driver.chargepoint.com) for global map search of real time EV charging port statuses and statistics.• Design and develop MapCache in-memory geographically-indexed statistics of real-time device statuses with distributed data replication across server cluster nodes for high availability and fault tolerance.• Architect and develop scalable distributed event processing server clusters utilizing Cassandra, Kafka and ZooKeeper to process tens of millions of transaction events per hour from charging devices, and deliver real time transaction updates to millions of mobile app users.• Architect and develop a horizontally scalable distributed WebSocket server cluster for resilient network communications with hundreds of thousands of EV charging devices using persistent WebSocket TCP/IP connections.• Design and develop distributed message routers and device protocol translators for scalable, device-agnostics, low-latency WebSocket communications with devices, to allow rapid application development by using simple REST APIs abstractions.• Architect and develop scalable distributed architecture of ChargePoint global power management cloud software services to execute multi-threaded processes of power sharing algorithms to optimize energy consumptions for tens of thousands of mission-critical EV charging devices in real time.• Design and develop power sharing algorithms using neural network like approach of iterative backpropagation algorithm to optimize EV charging energy consumptions in complex electrical topologies with multi-level hierarchy of oversubscribed panels and transformers.

San Jose, California, Us

• Introduced Enterprise Service Bus (ESB) technology to Marketo email campaign processing to decouple Marketo campaign processors and Mail Transfer Agent (MTA) server cluster; hence allowing asynchronous email sending execution, continuous campaign processing and automatic throttling to improve MTA server scalability, reliability and operation supportability.• Designed and dev. high volume email campaign processing with Apache ServiceMix open source ESB for 1600+ customers in multi tenant SaaS environment in 3 data centers.• Designed and impl. message queuing with ActiveMQ to support multiple quality of service for batch, transactional and test mailings.• Designed and dev. multi-staged message routing with SOAP WS and SFTP transports using Apache Camel with different parallel processing models for batch, transactional and test emails.• Designed and dev. messaging between PHP engine and ActiveMQ using streaming text Stomp protocol.• Architected and worked closely with Operations team to implement high availability ESB server cluster with horizontally scalable message consumers and fully redundant persistent message store using MySQL databases and NetApp NFS storage.• Designed and dev. email event uploading framework for joint partnership of Marketo and ExactTarget.• Worked closely with ExactTarget team to define data structure and cloud-to-cloud integration.• Designed and dev. prototype for MessageSystems Momentum MTA with high volume SMTP injection and Java JNI wrapper to extract email events using MS Jlog C API.• Designed and dev. durable unsubscribe management feature allowing customers to comply with CAN-SPAM Act.• Designed and impl. high performance unsubscribe email suppression in campaign execution using de-normalized master status db table that decoupled email suppression and synchronization of unsubscribe status across lead records.• Requested by Product, Support and Success team to give overview of durable unsubscribe feature and rollout plan.

Us

• Architected and developed private media sharing platform (www.circlous.com) based on private peer-to-peer networks and distributed storage. Circlous seamlessly combines data storage, bandwidth and computing resources of media owners and authorized recipients to efficiently deliver media files across the Internet.• Designed and developed connection-creation engine that analyzed and established best-suited peer-to-peer connections between client applications that were accepted by existing firewall systems in place using UDP, TCP or HTTP transport mechanism. • Created and developed data communication protocol to carry complex and repetitive data types for system components to communicate over various transport mechanisms of HTTP, TCP or UDP.• Designed and developed scalable and robust messaging service that leveraged the strength of UDP and HTTP protocols to efficiently deliver live messages such as user comments to large number of clients. • Engineered real-time search capabilities in Java and SQL to find optimal source peers for receiving selected contents. The search algorithm was based on optimizing peer data that were captured in real time such as content levels, number of connections and peer locations.• Created robust and intelligent multi-host data transmission engine with algorithm for receiving media files from multiple available source peers. • Designed and implemented database schema to manage critical data with foreign key relationships and indexing strategy to ensure data integrity and high performance.• Designed and implemented media server based on UPNP AV or DLNA open standard specifications.

Us

• Responsible for creating technologies to meet new market demands in remote access applications including peer-to-peer networks, firewall traversal systems, media access and distribution, distributed file systems and online device control. • Architected and led engineering team to develop an innovative remote file access application that combined firewall-traversal peer-to-peer network technology and innovative distributed file system. • Designed and implemented data communication platform that allowed Java-based client software to establish secure peer-to-peer connections for various remote access applications.• Designed and led engineering team to develop caching, compression and communication system to allow optimized performance for remote file systems over wide area network.• Managed engineering team to develop website using Servlets, JSP, Struts, JDBC, Hibernate and MySQL database for user web-based applications, account management and secure online payments.• Led and managed engineering and quality assurance team to identify and investigate critical issues and created frameworks for all team members to contribute in creating solutions.• Led and managed engineering team and data center consultants to design and build high performance, fully redundant and secure production server environment at co-location data center facility. • Worked closely with business development team which led to several partnerships with leading technology companies including Agilent, Fuji Electric, Panasonic, Phillips, Linksys and Western Digital.• Co-inventor of 10 granted US patents.

Stanford, Ca, Us

• Designed and led a team of graduate students to develop Stanford CyberLab, an online laboratory allowing students to perform physical experiments over the Internet. CyberLab was awarded 1999 Best Application of Measurement and Automation award from National Instruments. • Engineered software modules for devices, database systems and Java-based client applications to communicate for allowing users to observe, measure and control live experiments over the Internet. • Designed and implemented data network protocol that enabled point-to-multi-point communications between users, devices and databases. • Implemented robust Java-based server engine that routed data to enable live collaborations for students in performing laboratory experiment over the Internet. • Designed and developed dynamic web-based notebook that allowed students to manage lab data and results such as measurements, device states, computation analysis and notes.

Ms, Electrical Engineering

Bs, Electrical Engineering