01 / 10Apr 2026 — Present
KPMG Singapore
Full Stack Engineer · Singapore
- Building enterprise full-stack solutions across advisory and audit technology products.
ReactTypeScriptNode.jsCloud
Portfolio / 2026 / Singapore, Singapore
ELIXANDERTAN
Building agentic RAG systems, LLM-powered SaaS, and production-grade full-stack products for 11+ years.
Senior Full-Stack EngineerAI Engineer · LangChain / RAG / MCPAgentic Systems BuilderComputer Vision Prototyper
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01 — AboutBased in Singapore. Building agents, RAG systems, and production-grade full-stack platforms.
Shipping AI products since transformers were a novelty.
I’m Elixander — a senior engineer who moves fluently between frontend, backend, and the LLM layer. Currently a Full Stack Engineer at KPMG Singapore, previously Senior AI Developer at Merquri where I built agentic RAG SaaS with LangChain, shipped custom MCP servers with AWS Cognito auth for Aquariux AQX, prototyped natural-language-to-SQL for B2C analytics, and led GenAI enablement for ~90 employees.
11+ years across enterprise (IAG, NEC, IHiS) and startups — from retraining RASA and Dialogflow bots to finetuning ResNet on DeepFashion2, building PySpark pipelines reconciling 40M+ records, and deploying POCs end-to-end within 12-week accelerator cycles.
0+Years of engineering
0+Shipped projects
0Degrees & certs
~0Employees trained in GenAI
02 — SkillsFrom language models and vector stores to React, cloud infra, and data pipelines.
40 tools. One integrated stack.
LangChainAI
LangGraphAI
OpenAI GPT-4AI
Anthropic ClaudeAI
Agentic RAGAI
MCP ServersAI
RAGAsAI
Prompt EngineeringAI
Hybrid SearchAI
Vector DatabasesAI
TensorFlowML
PyTorchML
Scikit-learnML
OpenCVML
YOLOv8ML
ResNetML
RASA NLUML
Hugging FaceML
ReactFrontend
Next.jsFrontend
TypeScriptFrontend
Tailwind CSSFrontend
Material UIFrontend
React NativeFrontend
Vue.jsFrontend
FastAPIBackend
Node.jsBackend
NestJSBackend
ExpressBackend
PythonBackend
FlaskBackend
PostgreSQLData
MySQLData
SnowflakeData
PySparkData
PandasData
AWS (Cognito/S3/EC2)Cloud
DockerCloud
CI/CDCloud
GitCloud
Total40
03 — ExperienceKPMG · Merquri · IAG · NEC · IHiS · Netrust — across AI, full-stack, data, and integrations.
A decade of shipping.
02 / 10Jun 2024 — Apr 2026 · 1 yr 11 mos· Full-time
Merquri
Senior Software Developer (AI) · Singapore · Hybrid
- Developed agentic RAG based SaaS using the LangChain ecosystem with OpenAI and Claude, plus the RAGAs evaluation framework — focused on document preprocessing, hybrid search optimization, and agent tool integration.
- Integrated custom MCP servers with secure authentication using AWS Cognito for the Aquariux AQX trader application.
- Collaborated with the Data Science team to prototype natural-language-to-SQL query generation with integrated data visualisation for B2C self-serving analytics.
- Spearheaded AI adoption discussions with cross-functional teams and conducted GenAI knowledge sharing to ~90 employees to promote GenAI literacy.
- Developed POCs using computer vision tools (OpenCV) for video processing and live video streaming (Streamlabs OBS).
- Actively staying on GenAI developments through events such as AI Katana, AI Tinkerers and AI Red Dragon meetups.
LangChainLLMs (OpenAI, Claude)RAGAsMCPFastAPIReactOpenCVAWS Cognito
03 / 10Dec 2023 — Jun 2024 · 7 mos· Part-time
General Assembly
Data Science Immersive Graduate · Singapore · Hybrid
- Finetuned ResNet on the DeepFashion2 dataset for image similarity search to power e-commerce platforms, enabling personalized fashion recommendations.
- Designed a predictive linear regression model on open-source HDB Pricing datasets.
- Conducted data preprocessing, EDA, model development, and tuning using pandas, scikit-learn, and TensorFlow.
TensorFlowPyTorchResNetPandasScikit-learn
04 / 10Nov 2023 — Feb 2024 · 4 mos
Freelance
Data & Cloud Consultant
- Built a random-forest regression model to predict fundraising amount on Kickstarter, with GridSearchCV hyperparameter tuning and k-fold cross-validation.
- Performed data extraction, staging, and transfer for on-premise and AWS S3 data using SQL/SnowSQL in Snowflake, including recovery via Time Travel and diagnostics via Query Profile.
- Provisioned EC2 instances, security groups, IAM roles and access policies in AWS.
Scikit-learnSnowflakeAWSPandas
05 / 10May 2022 — Nov 2023 · 1 yr 7 mos· Full-time
IAG
Full Stack Developer · Singapore
- Streamlined data transformation with efficient PySpark and PostgreSQL scripts, reducing per-customer transformation times to milliseconds.
- Extracted and reconciled over 40 million records from 3rd-party APIs, extracting insights for customer acquisition strategy.
- Developed web application features and unit tests using ReactJS, MUI, NestJS, and Vitest within a BFF microservice architecture; resolved Socket.io issues that helped the team avoid a 2-week surge.
- Managed project communication, planning, and delivery for external stakeholders during the accelerator program — 1 successful POC implementation within 12 weeks.
- Collaborated in an agile environment: sprint planning, daily scrums, and peer code reviews using Confluence and Jira.
PySparkPostgreSQLReactMUINestJSVitestSocket.io
06 / 10Jul 2018 — May 2022 · 3 yrs 11 mos· Full-time
NEC Asia Pacific Pte Ltd
Senior Software Developer / Chatbot Developer
- Trained and maintained RASA language models to boost governmental and in-house chatbot accuracy by 30%.
- Developed features and maintained a React frontend + Express backend for the chatbot SaaS (JavaScript), and a Flask backend for the virtual-assistant model (Python).
- Designed a queueing process for model training to avoid server crashes on low-power hardware, ensuring >95% uptime.
- Built SSIS ETL pipelines with ODBC configuration for delta changes between SQL database and downstream BI consumption.
- Analyzed user interaction data and retrained the chatbot, finetuning responses by a further 10%.
- Implemented live chat using SocketJS and integrated external APIs and Duckling for enhanced features.
- Evaluated and deployed Watson AI Assistant, Google Dialogflow, and Microsoft LUIS on the cloud.
RASA NLUReactExpressFlaskPythonSSISDialogflow
07 / 10Nov 2015 — Jul 2018 · 2 yrs 9 mos
IHiS (Integrated Health Information Systems)
Systems Analyst
- Built and maintained JMS queues on Oracle Service Bus (OSB) and performed data mapping via WSDL for high-volume HL7 ADT messages from upstream healthcare institutions to National Electronic Health Records (NEHR).
- Automated service-bus monitoring using Cron jobs and bash scripts — downtimes detected and resolved 4× faster.
- Documented system architecture and addressed tier-2 tickets to ensure smooth operations.
- Participated in production deployment activities and user acceptance testing.
Oracle Weblogic/OSBWSDLCronBash
08 / 10Apr 2015 — Oct 2015 · 7 mos
JobsLah Pte Ltd
Software Developer · Singapore
- Developed web-app frontend and backend features using AngularJS, Google Material Design, and PHP CodeIgniter.
- Migrated web functionality into a hybrid Android mobile app using Cordova/PhoneGap.
AngularJSPHPCodeIgniterPhoneGap
09 / 10Jul 2013 — Apr 2015 · 1 yr 10 mos
Netrust Pte Ltd
IT Consultant / Mobile Developer
- Developed a micro-financing hybrid Android mobile app (Ardentrust) for Indonesia-based bank clients using PhoneGap Cordova, jQuery, MobileJS, HTML, and CSS.
- Administered MySQL backend and SQLite mobile databases on CentOS/Ubuntu, ensuring seamless data storage and retrieval via RESTful APIs.
MySQLSQLiteCordovaREST API
10 / 10May 2011 — Jul 2011 · 3 mos
Certis Management Pte Ltd
Project Management Intern
- Documented the first version of the Lean Six Sigma (LSS) Project Lifecycle Manual to ISO 9001 standards.
- Created LSS e-induction learning materials, reducing reliance on introductory programmes (saving 2 hours per participant/trainer).
- Assisted managers to automate Action Reviews using Excel and VBScript.
Project ManagementVBScriptISO 9001
04 — Selected WorkAI agents, RAG platforms, computer vision, full-stack SaaS, and cloud infrastructure.
52 shipped projects.
05 — EducationSingapore: NUS · NTU · Ngee Ann Poly · General Assembly · freeCodeCamp.
Two decades of learning, still compounding.
- 2017 — 2018
National University of Singapore
Master of Computing, Information Systems
- Dec 2023 — Jun 2024
General Assembly
Data Science Immersive
Data Collection, Processing, Cleaning, EDA · Supervised & Unsupervised algorithms (Regression, Classification, Clustering) · TensorFlow, ANN/CNN/RNN/LSTM · Naive Bayes · Hyperparameter tuning · SQL · NLP · PCA · Time Series (ARIMA, SARIMAX) · PySpark
- 2017 — 2018
freeCodeCamp
Full Stack Web Development Certification
- 2009 — 2013
Nanyang Technological University
Double Degree, Business & Computer Science
- 2004 — 2007
Ngee Ann Polytechnic
Diploma in Computer Engineering
06 — Credentials15 credentials · Google · MongoDB · Udemy · Oracle · AXELOS · ISACA · AI Singapore · NICF · VMware.
Certified. And still compounding.
ISACADec 2020
Certified CMMI Associate
ID · 79551562
Expired Dec 2023
On fileAI SingaporeApr 2020
Foundations in AI
Active
On fileNICFDec 2016
IT-IS-501S-1 · Develop Policy for User Support Procedures
Active
On fileNICFDec 2016
IT-IS-301S-1 · Provide First-Level Support
Active
On fileAXELOSDec 2016
ITIL® Foundation Certificate in IT Service Management
Active
On fileOracleFeb 2016
Oracle WebLogic Server 12c: Administration I Ed 1
Active
On fileOracleDec 2015
Unix and Linux Essentials Ed 1
Active
On fileVMwareOct 2013
VMware Certified Associate — Data Center Virtualization
Active
On file07 — Contact
LET’SBUILD.
Open to senior roles, AI engineering engagements, and consulting on agentic / RAG systems. Based in Singapore, working with teams worldwide.
Email/pondcto@gmail.com↗LinkedIn/linkedin.com/in/elixander↗WhatsApp/+1 (920) 808-8852↗Telegram/@starlightsoulmate↗
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