Gadtan
About

A polymath practice

Design, technology, business and the arts practised as one discipline rather than four — remote-first, and equally at home on-site.

Four fields that are usually kept apart, practised as one.

I am Gadtan Beriptyo Pujakusumo — an information systems graduate who works as a polymath: product and UI/UX design, web engineering, brand identity, video and motion, music production, and the business operations that hold them together. A project can travel from an unformed idea through research, interface design, implementation and launch without ever changing hands.

The foundation is analytical: information systems thinking applied to messy problems, so a sprawling system can be mapped into something a team is able to build, ship and maintain.

Today the work splits between Sinerli, the SaaS platform I founded, product design for client teams, and selected independent commissions in media and music. Each one keeps a different muscle in shape.

Guiding vision

Take the step, then keep improving on it — every single day.

Working philosophy

Every project is a blank canvas for making a measurable difference.

Experience

Where the work has been done

From an enterprise product team to an independent practice and a SaaS of my own.

Founder & Product Lead

Sinerli — SaaS platform

2025 — Present
  • Founded and run Sinerli, a SaaS platform built end to end: product strategy, interface, engineering and go-to-market.
  • Own the full product lifecycle — research, UI/UX, feature delivery and release.
  • Integrate large language models and automation so everyday workflows take fewer steps.
  • Keep the platform scalable through security, payment gateway and infrastructure work.
  • Carry the brand as well: identity, marketing assets, social content and launch video.
Fully remote sinerli.com

UI/UX Designer — Internship

PT Xapiens Teknologi Indonesia

Feb 2024 — Feb 2025
  • Designed the interface and user experience for web and mobile products, including the SLS coal-shipping operations system, the Mulaisaja.id IT services platform, a client portal, and the Xswift and Kadin applications.
  • Ran user-needs research, interface testing and competitor UI analysis, then folded the findings back into the UX decisions.
  • Built and maintained the design system used as the reference for visual consistency and delivery speed across every product team.
  • Produced multimedia content: icons, event banners, marketing brochures (Xignals, Odoo, Krew) and video edits for company channels (Kubernetes, X-Plant Short).
  • Worked inside an Agile team alongside product managers, business analysts, marketing and engineers to line design intent up with business goals.
On-site (WFO)

Independent Designer, Editor & Developer

Freelance — online and on-site

2019 — Present
  • Produced social media video content for Promex Providance, from the shoot through to the final edit.
  • Shot and edited prewedding photography sessions.
  • Taught the music extracurricular programme at SMA Yadika 5.
  • Delivered commissioned work through Fastwork: video editing, banners, flyers, photo retouching, social posts, graphic design and visual effects.
  • Took technical briefs as well — app development and Release Engineer / DevOps configuration.
Hybrid · on-site & remote
Education

Formal grounding

An information systems degree is what keeps the design work tied to how systems actually behave.

Bachelor of Information Systems (S1)

Universitas Bina Nusantara

Graduated on schedule with a strong academic record in system flow analysis and the implementation of technology and information design.

2021 — 2025
GPA 3.37 / 4.00
Capability matrix

Professional skills

Fifty capabilities across five disciplines, and the reasoning behind each one.

End-to-End Product Design 98%

Carrying a product from first concept through to shipped execution.

UI/UX Design 97%

Balancing visual craft with genuinely intuitive interaction.

Interface Prototyping 96%

Making system behaviour visible and testable before development starts.

UX Research 93%

Validating design decisions against real user behaviour and metrics.

Graphic Design 94%

Clean, modern, professional visual output across formats.

2D Canvas Manipulation 94%

Coordinate-based graphic manipulation and canvas systems.

Visual Aesthetic Concepting 92%

Holding a consistent visual language across an entire product.

Creative Direction 91%

Steering visual tone so it stays aligned with brand identity.

Logo & Brand Identity 90%

Distilling company values into a durable visual identity.

Detail-Oriented Execution 90%

Precision from individual interface components up to design governance.

Digital Ecosystem Development 96%

Designing architecture that connects multiple services coherently.

AI Integration 96%

Applying AI engines to real, load-bearing application features.

Web Development 95%

Computational logic and browser-based interface development.

SaaS Architecture 95%

Structuring the foundations of software delivered as a service.

Continuous Learning 95%

Adapting quickly as tools and platforms shift underneath.

Prompt Engineering 94%

Precise instruction design for specific, functional AI output.

Technical Troubleshooting 93%

Diagnosing technical obstacles independently across platforms.

Large Language Models 92%

Working knowledge of how language model systems behave.

Payment Gateway Integration 90%

Implementing digital payment gateways securely.

Mobile App Development 88%

Fundamental grounding in mobile application architecture.

Entrepreneurial Mindset 97%

Initiative to build independent ecosystems and family ventures.

Business Operations Management 96%

Running a full business operating cycle since 2023.

SaaS Product Management 95%

Leading the lifecycle of a productivity platform.

Project Management 93%

Guiding work from initial research through to release.

Inventory & Warehouse Management 92%

Structured stock and supply chain management.

Business Analysis 92%

Evaluating business models and implementing efficient flows.

Logistics Coordination 90%

Route planning and delivery systems that hit their windows.

Financial Management & Reporting 89%

Cash flow monitoring and financial oversight.

Client Relationship Management 89%

Maintaining retention and consistent customer satisfaction.

Supply Chain Management 88%

Tactical control of inbound and outbound goods.

Multidisciplinary Adaptability 96%

Moving fluently across technology, design, business and the arts.

Problem Solving 95%

Responding to technical and operational challenges efficiently.

Strategic Thinking 94%

Long-range vision when shaping products and business flows.

Client Needs Analysis 94%

Reading the root problem, not just the stated request.

Systems Analysis & Design 94%

Mapping complex system logic into measurable modules.

Effective Communication 92%

Articulating ideas clearly to clients and teams alike.

Cross-Functional Collaboration 90%

Bridging technical needs, design intent and business targets.

Team Leadership 90%

Guiding technical and operational teams.

Time & Priority Management 88%

Splitting focus between management and hands-on delivery.

Instructional & Teaching Skills 85%

Transferring knowledge and mentoring colleagues.

Music Production & Composition 92%

Turning a creative idea into a finished audio arrangement.

Video Production & Editing 90%

Assembling footage into dynamic, purposeful sequences.

Trend Research & Analysis 90%

Researching algorithms and identifying high-reach elements.

Digital Content Creation 89%

Producing creative material suited to each social platform.

Visual Storytelling 88%

Carrying a message through image and sound.

Audio/Video Post-Production 88%

Final-stage refinement of visual and audio work.

Social Media Strategy 87%

Content and hashtag mapping for audience growth.

Sales & Marketing Strategy 86%

Market entry through creative, functional strategy.

Spatial & Concept Design 85%

Spatial planning and 3D conceptual design.

Audio Mixing & Mastering 85%

Technical frequency work to reach optimal audio standards.

Let’s work together

Have a project in mind?

Get in touch View my work