Senior software engineer / AI-native builder

Building what comes next.

I’m Sefath Chowdhury. I love to build things. I'm an Infrastructure-focused software engineer with 9+ years of experience building secure, scalable systems in the cloud.

Explore my work Let’s talk

THE THROUGHLINE 001

From city plans to system design.

My first engineering work helped teams build physical spaces in New York. Today I build the digital foundations that let teams move faster and operate with confidence.

The same questions keep me curious: What are we building? Who depends on it? And will it hold up as the future takes shape?

More about my path

SELECTED EXPERIENCE 002

Built for scale.

Infrastructure, product engineering, and the systems that connect them.

01 PLATFORM + INFRASTRUCTURE

AlphaSights

Senior Platform & Infrastructure Engineer

Led cloud infrastructure and developer experience initiatives across AWS and GCP, supporting more than 50 production microservices.

Rebuilt analytics around Redshift and Airflow, with a reported $420k reduction in annual AWS operating costs.
Moved infrastructure into reusable Terraform modules and reviewable deployment pipelines.
Strengthened security and reliability through SOC 2 work, SIEM observability, Kubernetes operations, and Datadog monitoring.

02 FULL STACK + FINTECH

M&T Bank

Full Stack Software Engineer

Built web and mobile banking experiences, including Zelle features, and helped create internal testing and developer tools. Worked across Angular, .NET, GraphQL, and service integrations.

03 QUALITY + OBSERVABILITY

PerkinElmer

Full Stack Software Engineer

Developed automated end-to-end testing and performance dashboards for clinical research software, making bottlenecks easier to see and regression testing less manual.

EARLIER FOUNDATIONS 002A

04 / BUILT ENVIRONMENT

Skanska USA

Virtual design and construction for major New York projects, including Moynihan Penn Station. Automated CAD file organization alongside field coordination.

05 / FELLOWSHIP

CodeNow

Software engineering fellowship at Bloomberg, building Ruby projects and an education-focused data visualization.

06 / ENGINEERING

NYC School Construction Authority

Electrical engineering internship supporting public school construction through plans, bids, and building information modeling.

WHAT I’M BUILDING NOW 003

AI-native, engineered.

I built Software Factory Kit to give AI-assisted engineering a clear path from product intent to verified delivery, with bounded agent work and human decisions at each gate.

Explore my AI-native workflow

SOFTWARE FACTORY KIT / OPERATING MODEL IN PROGRESS

Define before building

Sharpen the brief, gather evidence, and turn intent into requirements and architecture.

Build with boundaries

Give each phase a skill, each agent a clear scope, and each milestone a human decision gate.

Verify and improve

Use automated checks, independent review, and a failure log to strengthen the next run.

PROJECTS + HACKATHONS 004

Ideas made real.

Selected experiments where product thinking met hands-on engineering.

01 / SYSTEMS · VIDEO DEMO

REAL PROJECT WALKTHROUGH

Equinox

A Go simulation for cross-venue prediction-market matching and smart order routing, built for a PEAK6 Labs partner project.

Explore source

02 / MOBILE PRODUCT

OpenSpot

A driveway marketplace for crowded cities. I drove the initial product plan and built Android screens, Google Maps and Places integrations, and Firebase flows with a small team.

View project

03 / HACKATHON WINNER

Bread Secured

A 24-hour hackathon project that turns job application emails into a simple status dashboard, using Flask, Gmail API, and Google Cloud AutoML.

View on Devpost

04 / FULL STACK

Mytudo

A task manager I designed and built end to end to learn full-stack product development, including authentication, data design, and deployment.

Explore source

ALL PROJECTS / DEMOSExplore the project archive13 projects, a real walkthrough, and source links ↗

MORE EXPERIMENTS 004A

ImmigrantHubCommunity storytelling / hackathon ↗Student Virtual AssistantVoice + campus data / hackathon ↗Music Reactive LEDsEmbedded systems / hardware ↗Equal Opportunity QuizClassroom tool / first client project ↗

TOOLS OF THE TRADE 005

The working toolkit.

Grouped by the problems I use them to solve.

Cloud & reliability

AWS, GCP, Kubernetes, Docker, Terraform, Helm, Datadog, Grafana, CI/CD

Application engineering

Python, TypeScript, JavaScript, Java, Kotlin, C#, React, Angular, Node.js, .NET, GraphQL

Data & systems

PostgreSQL, Redshift, Snowflake, Redis, OpenSearch, Airflow, REST, gRPC

AI-native development

Agent orchestration, hybrid RAG, grounding, evaluation loops, observability, verification, human review

BEYOND THE CODE 006

Always curious about what’s beyond the next ridge.

Outside of work, I’m usually looking for a trail, a new place to explore, or a small piece of nature to bring home. I love the details you notice when you slow down and look closer.

01 / OUT THERE

Find the long way around.

I hike, bike, travel, and seek out national parks. I love photography because it gives me another reason to pause and pay attention.

02 / GROWING THINGS

Build a little ecosystem.

Planted aquariums, fish, cats, and plants make home feel alive. I’m drawn to gardening, aquaponics, and hydroponics—and one day, I’d love a mini farm.

03 / WONDER

Keep the imagination on.

Pokémon, Avatar: The Last Airbender, and Naruto are longtime favorites. I love worlds built around discovery, growth, and a little adventure.

LET’S BUILD SOMETHING 007

The next thing starts here.

Interested in reliable platforms, agentic systems, or an ambitious project? I’d love to hear about it.

sefath.chowdhury@gmail.com