Bangkok, Thailand · available for senior & staff roles

Santi Liwsakphaiboon สันติ ลิ่วศักดิ์ไพบูลย์ · “Off”

Senior Software Engineer · Fintech & LLM agents

Senior Software Engineer building highly scalable financial-services platforms — and, increasingly, the LLM agents that operate them.

Get in touch Download résumé (PDF) GitHub LinkedIn

7+ yrs: Software engineering
120k: LSEG Workspace users served
40%: Eikon→Workspace conversion lift
13M+: Web users supported at True Digital

About

Senior Software Engineer with 7+ years building highly scalable platforms in financial services. I specialize in distributed back-end systems, configuration-driven deployment automation, and full-stack delivery, with growing expertise in LLM-based agents and agentic workflow automation. I have a track record of owning features end-to-end, driving measurable adoption gains, and mentoring engineers.

Experience

Senior Software Engineer

Refinitiv Thailand (London Stock Exchange Group) · Bangkok, Thailand

Apr 2021 – Present

Built LLM-based automation AI agents that streamline internal engineering workflows, reducing manual operational effort on repetitive tasks.
Design, build, and maintain highly scalable C# ASP.NET and Node.js platform services for LSEG Workspace, serving 120k customers globally.
Drove a 40% increase in conversion from Eikon 4 to LSEG Workspace by rolling out the 'Admin Managed Configuration' feature to support user migrations.
Own 3rd-level production support and root-cause analysis for critical platform incidents.
Partner with platform engineers across teams to deliver Workspace workflows and align shared components, eliminating duplicated effort.
Built and operate automated CI/CD pipelines based on version-controlled configuration, orchestration, and automated deployment / configuration management.
Work as part of a Scrum team, leading Agile SDLC processes and guiding junior members of the team.

Solution Architect · Job-Shadow Program

Refinitiv Thailand (LSEG) — Time Series Team · Bangkok, Thailand

Jul 2024 – Oct 2024

Selected for a cross-team job-shadow rotation as a solution architect on the Time Series team.
Studied the end-to-end architecture of the Tick History and Time Series platforms (enterprise-scale storage and delivery of high-volume historical market data), gaining hands-on exposure to distributed data architecture and design trade-offs.

Software Engineer (Outsource)

True Digital Group · Bangkok, Thailand

Nov 2020 – Mar 2021

Interacted with the product team, gathered business requirements, and designed technical solutions supporting 13M+ users and ~1.9M monthly visits on the web platform.
Developed new UI components to support high-volume websites.
Practiced the BFF (Backend for Frontend) pattern and implemented microservices to support products across multiple platforms.
Contributed to agile and scrum process — knowledge-sharing sessions and team building.

Software Engineer (Consultant)

Government Savings Bank · Bangkok, Thailand

Mar 2020 – Oct 2020

Helped the bank digitally transform its NPL/NPA management workflow into a web application.
Reduced cumbersome processes and standardized asset-valuation methodology.
Implemented a system providing Early Warning Signals (EWS) and Special Mention asset categorization.
Led a squad of 4 developers and 1 QA; demoed features to clients and shaped the digitalization roadmap.

Software Engineer

Ananta Solutions Co., Ltd · Bangkok, Thailand

Jul 2019 – Mar 2020

Researched the feasibility of promoting cannabis as a cash crop for Thai farmers.
Built BI dashboards to monitor and track cannabis flow in Thailand from seeding to production, and side effects of medical hemp use.
Designed databases, implemented APIs, and visualized data in an easy-to-understand format for users.

Software Engineering Intern

HES-SO, University of Applied Sciences of Western Switzerland · Yverdon-les-Bains, Switzerland

Feb 2019 – Jun 2019

Researched and ran experiments on Deep Learning for image processing; trained a custom object-recognition system.
Deployed embedded inference on smartphones and light computing systems (Raspberry Pi).
Implemented a system to match a given pose and find a scene where a character exhibits a similar pose using PoseNet.

AI & Engineering Projects

2025 – Present

Autonomous Multi-Agent System — AI-Operated Startup Architecture

A hierarchical multi-agent organization that runs a startup with a human in the loop.

Designed a hierarchical multi-agent system: a CEO orchestrator coordinating Software, Product, Marketing, and Sales department agents, each with specialist subagents, built on LLMs.
Engineered the operational stack — GitHub Issues as a task queue and Discord as the human interface — with a "draft, don't ship" human-in-the-loop approval policy.

LLM agentsMulti-agent orchestrationHuman-in-the-loopPython

2025 – Present

Quantitative Trading Research Framework

A reusable, asset-agnostic scaffold for turning market hypotheses into validated, backtested signals.

Built a reusable, asset-agnostic research methodology and runnable Python scaffold for turning market hypotheses into validated, backtested trading signals.
Embedded guardrails against overfitting and look-ahead bias; applied across equities, options, and crypto using Monte Carlo and options-pricing models.

Quant researchBacktestingMonte CarloPython

Skills

Languages & Paradigms

C# / ASP.NETTypeScriptJavaScriptOOPFunctional Programming

Frameworks & UI

Node.jsReact.jsVue.jsElectron.js

Architecture

REST / Web APIMicroservicesBFF (Backend for Frontend)Distributed systems

Cloud & DevOps

AzureGoogle CloudAWSFirebaseCI/CDGitSQL

AI & ML

LLM-based agentsMulti-agent orchestrationAgentic workflow automationPrompt engineeringDeep learning & edge deployment

Education & Publications

Degree

Assumption University of Thailand

Bachelor of Engineering, Computer Engineering

Bangkok, Thailand · Graduated Jan 2020 · GPA 3.15

Publications

Path Control of iRobot Create2 Based on Sensors

N. Aphiratsakun, S. Liwsakphaiboon — International Conference on Advanced Technology Innovation, 2019

Customer Recognition and Counting by Cloud Computing

A. Dersingh, S. Liwsakphaiboon, S. Charanyananda, A. Chaiyaprom, N. Domsrifah — International Technical Conference on Circuits/Systems, Computers and Communications (ITC-CSCC), 2019

Certifications, Languages & Leadership

Certifications

Microsoft Certified: Azure Fundamentals (AZ-900)Microsoft

Professional Scrum Master I (PSM I)Scrum.org

Spoken Languages

ThaiNative

ChineseFluent

EnglishProfessional working proficiency

Leadership & Activities

Refinitiv Thailand (LSEG)

Apr 2021 – Present

Represent the Admin Tools team at 'Workspace Wednesday' events, summarizing the team's quarterly contributions.
Guide interns to work effectively in a fast-paced, professional environment.
Organize knowledge-sharing sessions for the team.

Government Savings Bank

Mar 2020 – Oct 2020

Led a squad of 4 developers and 1 QA.
Demoed product features to clients and shaped the business workflow to digitalize.

Get in touch

Open to senior and staff software-engineering roles, and to conversations about LLM agents, agentic workflow automation, and large-scale fintech platforms.

santi.liwsakph@gmail.com +66 87 349 3482 GitHub @oofin008 LinkedIn Santi Liwsakphaiboon