OPEN TO WORK — SEATTLE, WA
FULL STACK DEVELOPER

Thenammai
Nachiyappan

React · TypeScript · Next.js · Node.js · Python · Azure

Nearly a decade of professional experience — from enterprise SAP systems at Accenture to shipping production React apps for climate tech, engineering firms, and nonprofits. I build software that works in the real world because I've lived in it.

View My Work → Let's Connect
Thenammai
SCROLL TO EXPLORE
9+
YRS PROFESSIONAL EXP
3+
YRS DEV ROLES
11+
PROJECTS SHIPPED
5
COMPANIES WORKED
ABOUT ME

Real-world experience
meets modern engineering

I'm a Full Stack Developer based in Seattle with nearly a decade of professional experience across enterprise systems, climate tech, engineering software, and nonprofit platforms.

I started my career as an SAP consultant at Accenture, managing enterprise security for global corporations. Then I made a deliberate pivot into software development — and since then I've shipped production applications at Hazen & Sawyer, The Climate Tech Handbook, and Mentor A Promise.

I don't just build features — I build things that work in the real world, because I've spent nearly a decade in it across enterprise, engineering, and nonprofit domains.

App Academy graduate. Passionate about clean UI, scalable APIs, and using technology to drive meaningful impact.

WHAT SETS ME APART
Enterprise Background + Modern Dev Skills
SAP Security · Basis · HANA · Fiori · GRC at Accenture & Nordson, combined with React, TypeScript, Next.js, Node.js, Python, and Azure in production environments. A rare combination at any experience level.

AT A GLANCE

CURRENTLY
Frontend Developer
Mentor A Promise · Remote · Dec 2025 – Present
PREVIOUSLY
Software Developer
The Climate Tech Handbook · 1yr 4mo · Full-time
PREVIOUSLY
Software Engineer
Hazen & Sawyer, Seattle · Jan–May 2024
FOUNDATION
Senior Software Analyst
Accenture & Nordson · 6+ years SAP
WORK HISTORY

Where I've worked

SOFTWARE DEVELOPMENT
CURRENT
DEC 2025 – PRESENT · 4 MOS
MENTOR A PROMISE · REMOTE
Frontend Developer & Software Engineer
Engineering scalable web applications with React and TypeScript. Ensuring high-quality UI/UX across the platform. Troubleshooting complex state management and UI logic issues in a collaborative remote team.
ReactTypeScript UI/UXState ManagementRemote
SEP 2024 – DEC 2025 · 1 YR 4 MOS
THE CLIMATE TECH HANDBOOK · FULL-TIME
Software Developer
Contributed to the development of an open-source climate tech resource platform used by a global community. Collaborated with international contributors to drive positive change through technology.
ReactTypeScript Tailwind CSSDocusaurusMarkdownAPI
JAN 2024 – MAY 2024 · 5 MOS
HAZEN AND SAWYER · SEATTLE
Software Engineer
Took full ownership of full-stack projects from initial design through to final acceptance testing for the LA City Stormwater Tool. Built interactive UIs with React, Express, and MUI. Worked with real-world civic infrastructure data at scale.
ReactExpress MUIFull-StackCivic Tech
JUL 2023 – JAN 2024 · 7 MOS
THE CLIMATE TECH HANDBOOK · PART-TIME · REMOTE
Software Engineer
Actively participated in handbook development, collaborating with a global community. Used Docusaurus, React, TypeScript, CSS, Markdown, and APIs to build and maintain content infrastructure.
ReactTypeScript DocusaurusCSSOpen Source
JUN 2023 – SEP 2023 · 4 MOS
PEOPLE TECH GROUP INC · ON-SITE
Java Developer Intern & Software Engineer
Gained hands-on experience building, debugging, and improving software applications using JavaScript and Java 8. Contributed to frontend and backend components. Developed proficiency in data structures and algorithms.
Java 8JavaScript Data StructuresAlgorithms
ENTERPRISE & SAP
FEB 2021 – JAN 2023 · 2 YRS
NORDSON CORPORATION · FREELANCE · US
SAP Basis & GRC Consultant
SAP Security — user access and authorization. Role creation and org-level updates. Authored architectural documents for Vertex, Concur, Web Dispatcher, Workday Interface, and BPC. Worked with Cohesity, Zerto, and SolarWinds. Performed Kernel Patch Upgrades and pre/post refresh steps.
SAP SecurityGRC BasisKernel PatchCohesitySolarWinds
MAY 2018 – OCT 2019 · 1 YR 6 MOS
ACCENTURE · GREATER CHENNAI AREA
SAP Security Consultant
Core SAP Security and Basis across ECC, BI, HANA, Fiori, and GRC (Access Control 10.1). Kernel Upgrade, TMS, User Administration, Role Management, and Testing in the Security environment.
SAP SecurityHANA FioriGRCECCBITMS
MAY 2016 – MAY 2018 · 2 YRS
ACCENTURE · GREATER BENGALURU AREA
SAP Basis Administrator
Managed enterprise system security and architecture across ECC, HANA, and Fiori. Wrote architectural documentation for Workday and Concur integrations. Performed high-stakes system upgrades and Kernel patches, maintaining 99.9% system uptime and security compliance.
SAP BasisECC HANAFioriWorkdayConcurJira
2012 – 2016
UNIVERSITY
B.Tech — Textile Technology
Foundation in systematic design thinking and analytical problem-solving that I carry directly into every engineering challenge today.
Design ThinkingProblem Solving
TECH STACK

Tools I build with

FRONTEND
ReactTypeScriptNext.jsJavaScriptReduxTailwind CSSMUIHTML5CSS3
BACKEND
Node.jsExpressPythonFlaskJavaREST APIsWebSocketCORS
CLOUD & DATABASE
AzureVercelRenderPostgreSQLSQLAlchemySequelizeSQL
TOOLS & PLATFORMS
GitGitHubJiraDocusaurusMarkdownSolarWindsCohesity
ENTERPRISE / SAP
SAP SecuritySAP BasisHANAFioriGRCECCBITMS
DOMAINS
Climate TechCivic TechNonprofitEnterpriseOpen SourceE-commerce
PORTFOLIO

Selected work I've shipped

🌱
AI-POWERED · FULL STACK
BUILT SOLO END-TO-END
FEATURED — AI + MAPS + FULL STACK
Plan-t Ahead
AI gardening companion built solo from scratch. Click anywhere on the world map to get the local climate zone and live 7-day forecast. Groq / Llama 3.3 generates full plant profiles on the fly — pH ranges, soil types, Gantt-style planting calendars, and companion guides. Zero loading spinners — AI response streams in real time.
React 18VitePythonFlaskSQLAlchemySQLiteGroq APILeafletOpen-Meteo
Live Demo ↗
KindleRead
NEXT.JS + FASTAPI + AI
KindleRead
Kindle-inspired reading platform with AI-powered book recommendations via Groq API. Scroll-based progress tracking and cross-device "resume reading" — built frontend, backend API, and AI integration solo.
Next.js 14Tailwind CSSFastAPIPythonSQLiteGroq APIVercel
Live Demo ↗
🗺️
5 THIRD-PARTY APIS
City Navigation & POI Explorer
Turn-by-turn routing via OpenRouteService, nearby POI discovery via Overpass API, Wikipedia extracts, and real-time voice feedback — integrating 5 APIs into one seamless experience. Fully responsive mobile and desktop.
ReactReact-LeafletOpenRouteService APIOverpass APINominatim APIWikipedia API
Live Demo ↗
Snake Game
FULL STACK + AUTH
Snake Game
Nokia nostalgia meets modern architecture. JWT auth, bcrypt-secured accounts, persistent high scores via PostgreSQL, and real-time leaderboards. Built frontend, backend, auth, and CI/CD pipeline solo.
ReactViteFastAPIPythonPostgreSQLJWTbcryptVercel
Live Demo ↗
Fakebook
FULL STACK
Fakebook
Social networking platform with real-time posts, comments, reactions, and WebSocket-powered chat. Fully relational PostgreSQL database with Flask REST API backend.
ReactReduxPythonFlaskPostgreSQLWebSocket
Live Demo ↗
Buy-Ktsy
FULL STACK
Buy-Ktsy
Etsy-inspired marketplace with product listings, purchases, review system, and shopping cart. Full CRUD with image uploads and real-time search.
ReactReduxPythonFlaskSQLAlchemyPostgreSQL
Live Demo ↗
t-bnb
FULL STACK
t-bnb
Airbnb-inspired vacation rental platform with property listings, date-range booking, review systems, and full user authentication.
ReactReduxNode.jsExpressSequelizePostgreSQL
Live Demo ↗
Currency Converter
NEXT.JS + TYPESCRIPT
Currency Converter
Live currency converter with REST exchange-rate API. Built with Next.js and TypeScript, deployed on Vercel. Tackled client-side env variable handling for production API access.
Next.jsTypeScriptTailwind CSSREST APIVercel
Live Demo ↗
Recipe Manager
FULL STACK
Recipe Manager
Add and browse recipes with ingredients, prep time, and images. Flask REST API with CORS, environment-variable-driven deployment across Vercel and Render.
ReactPythonFlaskPostgreSQLCORSVercel
Live Demo ↗
CONTACT

Let's build
something together

I'm actively looking for my next role as a Full Stack, Frontend, or Backend Developer — especially at companies building products where my real-world experience adds genuine value.

Based in Seattle, WA. Open to on-site, hybrid, and remote roles.

✉anbunachiappan@gmail.com inlinkedin.com/in/thenammai-nachiyappan </>github.com/thenunachi
BEST WAY TO REACH ME

Send me a message on LinkedIn or drop me an email — I typically respond within 24 hours. I'm always open to hearing about interesting roles, projects, or collaborations.

Email me directly →
CURRENTLY OPEN TO
Full Stack Roles Frontend Roles Backend Roles Remote Hybrid On-site Seattle