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Sayyid Shalahuddin

Sayyid Shalahuddin

Full-Stack Web Developer (Web Apps & AI Features)
📍 Jakarta, Indonesia · (0) · Member since October 2026
Availability
🏠 Works remotely / from home Yes No
🧰 Travels to client Yes No
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Presentation

build web applications end to end, from the interface a user actually touches down to the database and server behind it, and I increasingly build the AI features inside them too. Smart search, chatbots that actually know your content instead of making things up, automated matching, tools that turn a messy manual process into something that runs itself.

Over the past year I've worked as an independent full-stack developer across a few different industries, including fintech, travel booking, and software for education and recruitment. My own recent projects include MIRA, a legal-assistance chatbot that answers questions by searching through real regulations instead of guessing, Sketvio, a diagramming tool that turns a short prompt into something you can actually edit afterward, and Lamaro, a tool that automatically matches job applicants to openings and fills out the application for them.

What I'm good at specifically: building something from a rough idea without a full specification, fixing a slow or broken website someone else built, adding login and payments properly, and building AI features that are actually reliable rather than a flashy demo that falls apart the first time a real user tries something unexpected.

I write in React and Next.js on the frontend, and Python or Node.js on the backend, with PostgreSQL or MongoDB behind it. I also use modern AI coding tools daily as part of how I build, which means I move fast without cutting corners on testing or security.

If you have an idea, a half-built product, or something that's quietly broken and needs fixing, tell me what it is and I'll give you a straight answer about what it would actually take to get it working properly.
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Background

Independent Contractor
Undisclosed · 01/06/2024 – Today
- Worked on multiple client projects as an independent contractor, delivering end-to-end software solutions across backend, frontend, cloud, and AI domains.
- Developed and maintained backend services using Python (FastAPI, Django), Go, and Java (Spring Boot) to support scalable and high-performance systems
- Built modern web and mobile applications using React, React Native, Next.js, Node.js, NestJS, and Express.js
- Designed and deployed cloud infrastructure using AWS, Google Cloud, and Terraform, ensuring scalability, reliability, and maintainability
- Integrated AI-powered features (LLM and AI services) to support automation, data processing, and intelligent workflows
- Collaborated with multiple clients and distributed teams to translate business needs into production-ready technical solutions
- Delivered modular, maintainable, and well-structured code while adapting quickly to new domains and architectures
Tech Lead
LinkUpp Pte Ltd · 01/07/2023 – 31/05/2024
- Led cross-functional engineering teams in building and scaling a social media and edutech platform.
- Worked directly with Founders and C-level stakeholders to define technical direction, product scope, and delivery priorities
- Led distributed, multi-country engineering teams across backend, frontend, mobile, and DevOps
- Designed and reviewed system architecture across application and infrastructure layers
- Translated product ideas, requirements, and wireframes into scalable and high-quality implementations
- Integrated external APIs and third-party services to extend platform functionality
- Improved application performance, reliability, and scalability through continuous optimization
- Introduced engineering best practices, tooling, and workflows to improve development efficiency
Team Lead Developer
Prestisa · 01/11/2021 – 31/01/2024
- Led backend, frontend, and mobile teams in building and scaling a merchant aggregation and order management platform.

- Worked directly with Founders and C-level stakeholders, reporting to the Head of IT

- Designed systems that automated previously manual order processes between customers and supplier partners

- Built a platform where customers place orders digitally while suppliers receive, manage, and fulfill them through integrated workflows

- Led development of a supplier bidding mechanism, enabling multiple suppliers to compete for incoming orders

- Enabled customers to select suppliers based on bids, availability, and operational criteria

- Coordinated cross-team delivery to ensure system consistency and reliability

- Improved scalability, performance, and stability through architectural and process improvements

- Collaborated closely with product, operations, and business teams to evolve features based on real operational needs
Software Engineer
Coop Access · 12/08/2019 – 31/01/2022
- Contributed to the development of a digital cooperative platform enabling members to perform financial and operational activities online through web and mobile applications.
- Worked across backend, frontend, and mobile layers to deliver end-to-end system functionality
- Developed features supporting cooperative financial operations such as deposits, withdrawals, loans, and PPOB services
- Helped transform traditionally offline cooperative workflows into fully digital processes
- Collaborated with cross-functional teams to design, implement, and improve system features
- Improved application performance, stability, and usability through continuous enhancements
- Participated in testing, maintenance, and issue resolution to ensure a reliable user experience
Bachelor
STMIK Triguna Dharma · 2014 – 2018
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Working hours

Monday
From08h00To18h00
Tuesday
From08h00To18h00
Wednesday
From08h00To18h00
Thursday
From08h00To18h00
Friday
From08h00To18h00
Saturday
From08h00To18h00
Sunday â–ª Today
From08h00To18h00
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