Solution Design Engineer

Fajar Cahyadi

Email: *****.*******@*****.*** Phone Number: 781-***-**** Legal Status: US Citizen

Professional Summary

Results-oriented solution consulting skills with extensive 22 years of experience in the telecommunication/cellular/IT industry.

Excellent problem-solving, communication, and interpersonal skills

Expertise in applying telecommunication techniques, concepts, principles, and theories, including their components and associated protocols and standards and how they integrate with one another.

Skilled in solution design, planning, implementation, and project management.

Excellent collaboration, communication, and presentation abilities.

Meticulous (attention to detail), and result-driven oriented.

Experience in applying concepts, principles, theories, and methods for evaluating and testing telecommunications and computer networks.

Proficient in designing standard off-the-shelf and fully tailored and customized solution based on any-to-any protocol

Expertise in SS7, SMS, SMS Hubbing, SMS Firewall, SMPP, and core 2G GSM, 3G UMTS, 4G LTE/EPC, 5G networks, protocols, and interfaces, architecture

Experience with Microsoft Office, Java, SQL, Agile, plantUML, API, POSTMAN, JIRA, Confluence, Salesforce, Amazon Web Services, cloud computing.

Professional Experience

Titanium Platform LLC, MA January 2022 - June 2023 Solution Design Engineer

Worked remotely, full time with 40 hours per week, from Johns Creek/Alpharetta, GA.

Analyzed diverse information systems requirements to develop detailed functional requirements and contract specifications for systems which solve complex or unusual problems.

Product management: coordinate across stakeholders and use agile to align cross-functional teams around a common vision or strategy and user needs.

Acted as the bridge between the product, technology, and sales departments to create service solutions that are achievable and profitable.

oLed solution demonstration to customer to showcase the proposed solution.

oPresented the solutions to internal teams and customer.

Software engineering: conceptualized, designed, sold, and assisted with implementation of standard off-the-shelf and customized solutions.

oApplied principles and methods used for test planning, evaluation, verification, and validation of systems or system elements.

oCreated and maintained documentation of system, subsystem, or equipment life cycle, e.g., High Level Documentation (HLD) and Solution Design Documentation (SDD) using SQL, Java, API, and plantUML principles, to showcase network solutions.

oCreated system configuration guide.

oTested the system using POSTMAN, API, SOAP UI, and Wireshark. Design issues were captured via JIRA tickets and solved in a timely manner.

Top soft skills performed: attention to detail, customer service oriented, problem solving, and presentation.

Led the design of advanced engineering and network solutions for emergency call solution based on Swisscom NG112 specification using various protocols such as SFTP, HTTP, and SIP.

Netnumber, MA July 2018 - December 2021 Solution Design Engineer

Worked remotely, full time with 40 hours per week, from Tampa, FL, and Johns Creek/Alpharetta, GA.

I have same activities like described above when working in Titanium Platform LLC.

Configured Amazon Web Services (AWS) with the following activities:

oCreated AWS account with Multi Factor Authentication.

oEnabled billing alert and created bill alarm.

oCreated and connected to Windows and Linux EC2 Machine

oCreated S3 bucket

oCreated Identity and Access Management (IAM) configuration

Examples of my designs:

Off the shelf solutions for STP, Diameter Routing Agent in 4G LTE network on various common interfaces such as S6a, Gx, Gy, Cx, and Sh, and SS7 Signaling Firewall.

Bespoke solutions for the following:

oProtocol conversion between Radius, Diameter, and 5G SMF N40 interface lite version.

oSOAP Provisioning GW on HTTP service.

oSTIR/SHAKEN based on SS7 and SIP.

oDNS ENUM A2P Messaging to identify if a sender is A2P number like 10DLC (10 Digit Long Code).

oUniversal Call Blocking based on AIN protocol.

oCentralized routing engine for multi-protocol number portability (for NANP as example) such as DNS/ENUM, SIP, SS7 ITU & ANSI (AIN, PCS, IS41, CNAM, MAP).

oDesigned bespoke solution for any-to-any protocol, including API call handling.

iBasis, MA March 2016 - March 2018 Signaling Architecture Manager

Worked onsite, full time with 40 hours per week.

Slashed vendor’s professional service cost 50% by negotiating cost, fee, and scope of work, while still delivering good quality result for implementation of DSR/DRA.

Developed in-house technical expertise for the migration of Oracle DSR/DRA and audit of SS7/Sigtran monitoring solution, resulting in zero vendor cost.

Tightened security of SS7 and Diameter networks to secure customer networks from unwanted traffic.

Led the successful implementation of a packet data gateway (PGW) project, enabling iBasis to enter the data breakout gateway market.

Enhanced customer visibility by customizing CDR and reports on SS7 and Diameter traffic.

Ensured seamless and painless customer migration for voice traffic by designing migration strategy without a need of changing customer configuration.

iBasis, MA February 2014 - March 2016 Senior Mobile Architect

Worked onsite, full time with 40 hours per week.

Redesigned the architectural network of Oracle DSR/DRA in iBasis, resulting in a 70% decrease in vendor cost by changing commercial licensing model.

Provided clear design recommendations of SS7, Sigtran, STP, SMS Hubbing, SMS Firewall, and DRA, reducing the risk of overcapacity and enhancing productivity.

iBasis, MA October 2011 - February 2014 Mobile Architect

Worked onsite, full time with 40 hours per week.

Innovated Signaling Intelligence Reports for SS7 traffic using Tableau, generating a new revenue stream for the company.

oInitial mockup and test were performed to process raw data using Excel with various functions such as vlookup, hlookup, pivot tables.

Led the implementation of SMS Hub and SMS Firewall projects, ensuring complex routing, address translation, and blocking/filtering rules were in place to meet customers’ specific requirements.

Designed SMS MNP dip solution, generating additional revenue for the company.

oStarted by identifying the problem, determining accuracy and relevance of information, followed by making sound judgment to generate and evaluate alternatives and then finalized by making recommendations.

Awarded “iBasis Exceptional Achievement Award” in 2013.

Enhanced team collaboration and better visibility on SS7 configuration and monitoring by designing sets of recommendation of operation, maintenance, and monitoring of Oracle Eagle STP Signaling Transfer Point.

Sevenseas Technologies, Kenya March 2009 - October 2011 Technical Business Manager

Worked onsite, full time with 40 hours per week.

Awarded one of best performers in Seven Seas Technologies in 2010.

Designed, project managed, and implemented STP and SMS Firewall solutions, enabling the leading mobile operator in Kenya to better control its SS7 and SMS traffic.

Cisco System, Indonesia April 2006 - March 2009 System Engineer

Worked onsite, full time with 40 hours per week.

Recognized for technical contributions through significant financial deals in Cisco.

Successfully sold Probeless Monitoring Packet (PMP) feature in Cisco ITP, becoming the first Cisco engineer worldwide to do so.

Ran Cisco GSM Radio Access Network Optimization (RAN-O) trial and sold it to customer in APAC region, being the first Cisco engineer in the region to achieve this.

Awarded “The Best Service Provider Team Award” in Cisco APAC for outstanding contribution in 2007.

Received rewards from Cisco for excellent support to Indosat on its Sigtran network.

Indosat, Indonesia November 2003 - December 2005 Core Team Lead

Worked onsite, full time with 40 hours per week.

Conducted instructor/trainer for “Introduction for Signaling SS7” and “Introduction for GSM” courses.

Merged two GSM networks (Satelindo and Indosat) into one network, improving customer experience.

Redesigned the MSC function into tandem switch function, resulting in CAPEX savings.

Simplified and centralized core legacy TDM and Sigtran SS7 network through the design and implementation of signaling transfer point (STP) solution from Cisco ITP across cities and regions.

Designed and implemented Roamware’s Single IMSI Multiple MSISDN solution, further enhancing customer experience.

Recognized as the best engineer in Core NSS GSM Department in 2003.

Satelindo June 2001 - November 2003 Signaling SS7 Engineer

Worked onsite, full time with 40 hours per week.

Implemented screening on SS7 routing database to secure the company’s core SS7 networks.

Turned up new GSM Mobile Switching Centre (MSC) with all SS7 routing configuration (MTP, SCCP, GTT) and IMSI/MSISDN numbering plan.

Installed and repaired telecommunication network system components.

Optimized system performance through repeated adjustment, testing, and re-adjustment.

Recognized as the best SS7 Engineer in 2002.

Satelindo April 2001 - June 2001 Network Operation Center Engineer

Worked onsite, full time with 40 hours per week.

Ensured network availability and reliability of core GSM networks meet defined expectation.

Technical Skills

Protocols: SS7 (MTP, SCCP, ISUP, IN, AIN, PCS, IS-41, CNAM, CAMEL), Sigtran, SMPP, Diameter, HTTP, HTTPS, SOAP, ENUM, DNS, SIP, STIR/SHAKEN

API: Postman, SOAP UI

Project management tools: JIRA

CRM: Salesforce

Language: Java, SQL, plantUML

Version Control: Git, Github

Development Tools (IDE): Intellij, VSCode

RDBMS: MySQL

Document and file generation tools: XML, JSON

Methodologies: Agile,Scrum, Waterfall

Network packet analyzer: Wireshark

Microsoft products: Word, Excel, PowerPoint, Visio

Collaboration tools: Teams, Zoom, Confluence

Education

Bachelor of Telecommunication, Electrical Engineering from University of Indonesia.

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