Building AI products at Bati

Calvin Hendra

Software Engineer

Final-year Computer Science student and Software Engineer Intern with hands-on experience delivering end-to-end applications in a fintech and AI-driven environment. Experienced in backend systems, API development, database design, AI-powered integration, and frontend development for building complete, production-ready applications. Comfortable working on complex problem-solving tasks, debugging system-level issues, and collaborating in team-based development to deliver reliable solutions.

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Stack

Technologies

JavaScript

TypeScript

Python

FastAPI

Next.js

React

Tailwind CSS

Node.js

Express

PostgreSQL

MySQL

Docker

AWS

Career

Experience

February 2026 - Present

Software Engineer · PT Bati Investasi Teknologi

Led the development and maintenance of a widget-based AI sales agent embedded into client websites to support user acquisition and conversion. Owned full-stack feature development, including LLM-based workflows using Retrieval-Augmented Generation (RAG), along with system observability through tracing and monitoring. Collaborated closely with product and business teams to align AI behavior with financial domain constraints and sales objectives.

TypeScriptNext.jsReactTailwind CSSPythonFastAPILangChainRAGPostgreSQLVector Databases

February 2025 - February 2026

Software Engineer Intern · PT Bati Investasi Teknologi

Contributed to the development of Bati's AI Wealth Management platform and the early-stage AI sales agent as part of the engineering team. Worked on full-stack web features, backend APIs, and initial RAG pipelines supporting both internal wealth tools and client-facing experiences. Collaborated with the trading team to support data workflows and internal tools used for financial analysis and modeling.

TypeScriptReactNext.jsTailwind CSSPythonFastAPIPostgreSQL

Work

Projects

Bati WealthAI

Responsible for the development of Bati WealthAI, an intelligent web based CRM for relationship manager to grow their portfolio with Bati AI integration.

TypeScriptReact.jsNext.jsTailwindCSSNode.jsExpress.jsPostgreSQL

MulaiDulu

Led the development of MulaiDulu, a coaching platform aimed at empowering MSMEs and individuals to grow their businesses.

HTMLBootstrapLaravelMySQL

MakanGak

Led the development of MakanGak, a website on food options around Binus University, to assist new students in finding meals.

HTMLCSSJavaScriptReactJsNodeJsMySQL

GymMe

A dynamic e-commerce website specialising in supplement sales.

HTMLCSSC#ASP.NET

Sea of FTars

Frontend of a interactive and responsive gaming website.

HTMLCSSJavaScript

Learning

Certifications

May 2024

Certified Backend Developer with Node.js · BINUS Center

Earned certification in backend development by completing an intensive program focused on Mastering Backend Development with Node.js. Demonstrated expertise in server-side development, RESTful API design, database integration using Sequelize ORM, and middleware implementation through a rigorous assessment process.

Node.jsExpress.jsSequelizeMySQLREST API

Community

Organizations

Nov 2023 – July 2024

Member · Google Developer Student Club

Participated in training sessions organised by the club, gaining valuable skills in both technical and non-technical areas

Coding

Mar 2023 — Jan 2024

Creative Design Activist · Keluarga Mahasiswa Buddhis Dhammavaddhana

Designed posters for social media platforms using design tools to enhance promotional materials' visual appeal and Collaborated with the marketing team to ensure designs aligned with organisational branding and messaging.

DesignCanvaPhotoshopCollaborationTeamwork

Nov 2022 – Sept 2023

Activist · Bina Nusantara Computer Club

Coordinated with team members to develop and execute impactful work programs, ensuring successful implementation and participated in training sessions organised by the club, enhancing hard skills and soft skills

Public SpeakingCodingDesignTeamworkCollaboration

Contact

Let's build something together

Based in West Jakarta — open to interesting problems.

[email protected]