Work Type
Full TimeLocation Preference
On-SiteRemoteHybridLocation: Tokorozawa, SaitamaTokyo, 13
Open to relocation: Yes
Tran Quang Sang
Senior Software Engineer / Tech Lead
Tokorozawa
Work Preference
Summary
Senior Software Engineer with over 10 years of experience in embedded systems, enterprise web applications, and backend infrastructure. Led technical initiatives in microservices optimization, system stabilization, and cross-functional team management. Proficient in C/C++, Java, Go, PHP, and cloud platforms including AWS, OCI, and GCP. Bilingual in English and Japanese (JLPT N2 certified).
Overview
1
1
Certification
15
15
years of professional experience
3
3
Languages
Work History
Tech Lead / Senior Software Engineer
Adventure, Inc.
12.2024 - Current
- Feature Delivery & Architecture: Led backend development and integration for key features including Refund Protect, Luggage Insurance, and Skyticket Loyalty Points.
- Optimized transaction flow logic across Payment and Insurance microservices, achieving over 20% reduction in transaction failures.
- Led backend development and integration for key features like Refund Protect, Luggage Insurance, and Skyticket Loyalty Points, driving improved customer value.
- Architected backend replacement of convenience store payment gateways, enhancing integration and reliability.
- Tech Stack: Java (Spring Boot), PHP (Laravel), Go, Linux, macOS.
Senior Software Engineer / Sub-Leader
FPT Japan Holding
03.2023 - 11.2024
- Database Infrastructure Upgrade (2024/04 – 2024/11): Managed the upgrade of Oracle DB instances from 19c to 23ai on OCI. Corrected parameter sheets and executed deployments 3 weeks ahead of schedule.
- Electronic Application System (2024/01 – 2024/03): Led 10-person team to resolve legacy bug backlogs and improve system stability, facilitating a smooth project handover.
- Customer Support System (2023/06 – 2023/12): Developed technical specifications for hotel and resort management software, mentoring junior engineers and clarifying design ambiguities.
- Tech Stack: Java (Spring Boot), C#, Linux, Oracle DB, OCI.
Assistant Chief / Lead Software Engineer
TAP Company
12.2019 - 03.2023
- System Automation & Infrastructure: Developed custom portal tools for AWS EC2 instance provisioning and updated Ansible playbooks, reducing deployment time for builds and databases.
- Team Leadership: Managed task allocations, conducted code reviews, and created onboarding programs, enhancing integration of new engineers in a 4-person maintenance team.
- System Maintenance: Oversaw critical response and resolution processes for incidents on resort management platform, ensuring minimal downtime and swift recovery.
- Tech Stack: Java (Spring Boot), PostgreSQL, IBM DB2, AWS, Ansible, Slack API.
Programmer Analyst II
FIS
12.2017 - 04.2019
- Customized and updated ATM/banking switch software to version 7.5, enhancing system capabilities.
- Served as technical liaison, facilitating communication between global FIS technical team and local enterprise clients.
- Tech Stack: C++, Java, AIX, ISO8583, Banking Switch Systems.
Software Development Engineer
Wirecard
12.2016 - 11.2017
- Customized core POS applications for Nexgo terminal platform, ensuring compliance with EMV, ISO8583, and Smartcard protocols.
- Utilized C programming language and Windows operating system for development.: C, Windows, EMV, ISO8583.
- Designed scalable payment processing services using Java and Spring for transaction-heavy platforms.
- Led microservices architecture improvements to enhance reliability and simplify deployment workflows.
- Optimized database queries and caching strategies to improve application responsiveness and throughput.
Embedded Software Engineer
Global CyberSoft Vietnam
05.2014 - 11.2016
- Driver Integration: Integrated third-party vendor drivers into client hardware platforms, enhancing compatibility across Linux and RTOS environments.
- Issue Resolution: Identified and resolved system-wide driver bottlenecks, collaborating with silicon vendors to implement firmware patches.
- Tech Stack: C, Makefile, Buildroot, Linux, RTOS.
Embedded Software Engineer
Renesas Design Vietnam
03.2012 - 05.2014
- Developed test suites and automated test executions using C and Tcl to ensure reliability of in-house graphics libraries on FreeRTOS and bare-metal systems.
- Tech Stack: C, Tcl, CUnit, Visual Studio, FreeRTOS.
- Developed embedded software for RTOS and Linux platforms using C and C++.
- Integrated device drivers and communication protocols for hardware-software interaction.
- Debugged firmware issues with logic analyzers, oscilloscopes, and source-level tools.
Education
Bachelor of Science - Computer Science And Technology
Ho Chi Minh University of Technology
Ho Chi Minh, Vietnam 04.2001 -
Skills
Languages: C/C (6 yrs), Java (3 yrs), Microservices Architecture, Go, C#, JavaScript, Unit Testing
Frameworks: Spring Boot, Laravel, NET Framework, C unit testing
Agile methodology
Issue investigation
Test-driven development
Microservices architecture
Cloud & Infrastructure: AWS (EC2, Networking), Oracle Cloud Infrastructure (OCI), Ansible, Docker, Buildroot, Linux administration
Certification
JLPT N2 Certification: Fluent in professional Japanese business communication and team instruction., Architectural & Analytical Problem Solving: Strong capability to analyze macro-architecture, isolate hard-to-find system bugs, and coordinate technical resolutions across multi-disciplinary teams.
Accomplishments
- Mentored 10 new employees to bring them up to speed on projects, resulting in quicker overall completion milestones.
Work Availability
monday
tuesday
wednesday
thursday
friday
saturday
sunday
morning
afternoon
evening
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Languages
English
Advanced (C1)
Japanese
Intermediate (B1)
Vietnamese
Bilingual or Proficient (C2)
Interests
Thinking
Running
Timeline
Tech Lead / Senior Software Engineer
Adventure, Inc.
12.2024 - Current
Senior Software Engineer / Sub-Leader
FPT Japan Holding
03.2023 - 11.2024
Assistant Chief / Lead Software Engineer
TAP Company
12.2019 - 03.2023
Programmer Analyst II
FIS
12.2017 - 04.2019
Software Development Engineer
Wirecard
12.2016 - 11.2017
Embedded Software Engineer
Global CyberSoft Vietnam
05.2014 - 11.2016
Embedded Software Engineer
Renesas Design Vietnam
03.2012 - 05.2014
Bachelor of Science - Computer Science And Technology
Ho Chi Minh University of Technology
04.2001 -