Product mindset
We care about onboarding, retention, and support — not only closing the sprint.
Web application studio
High-impact web apps, engineered for growth
We partner with teams who need serious frontends: authenticated dashboards, multi-tenant SaaS, ecommerce backends, and realtime workflows — delivered with TypeScript, modern React, and boringly reliable operations.
- Next.js / React SPAs & SSR
- REST & GraphQL API integration
- Auth, roles, and billing flows
- Performance budgets & monitoring
Typical first reply · within 1 business day · English & Vietnamese
You get a scoped path
Rough timeline, risks, next step — no endless sales deck.
Engineers read your brief
Senior people lead discovery, not a rotating call-centre roster.
Code you can inherit
Documentation, handover, sensible defaults — your team owns the stack.
If software is slowing you down, we fix the right layer
Most founders do not need more tickets — they need a partner who ships the product experience customers feel, and the reliability your team stops firefighting.
Our app feels slow or breaks on bad networks.
Scarlet: Performance budgets, resilient data fetching, and UX that fails clearly — not silently.
Every new feature takes forever and feels fragile.
Scarlet: Clear architecture, typed boundaries, and reviews that keep complexity visible.
We outsourced once and got unmaintainable code.
Scarlet: You get readable TypeScript, docs, and a handover your devs can own.
We are not sure what to build first.
Scarlet: We help you sequence scope so the first release proves value — then we scale.
Why teams choose Scarlet over a generic agency or loose freelancers
Senior execution
Hands-on builders with production scars: auth, billing, realtime, integrations.
Straight communication
Weekly visibility, blunt trade-offs early, documentation you can reuse.
Live preview
Built like a serious product team — backed by serious engineering
The lattice below runs in your browser — instanced meshes and motion in three.js. It is how we think about frontends too: resilient, coherent, nothing falling apart under load.
Elastic infrastructure
Distributed frontends without chaos
From edge-ready SSR to fault-tolerant client hydration, we engineer surfaces that degrade gracefully when networks and APIs misbehave — so your users keep working when the real world gets messy.
- Edge + regional routing awareness
- Resilient data layers with stale-while-revalidate
- Back-pressure friendly streaming UX
From first message to a plan you trust
- 01
Short brief
Goals, users, constraints — 15 minutes of writing.
- 02
Deep-dive call
We ask sharp questions; you see how we think.
- 03
Proposal
Scope, phases, ballpark — no surprise invoices.
- 04
Build & ship
Iterative releases you can show stakeholders.
We do our best work when this sounds like you
No pressure — if the fit is not mutual, we will tell you quickly and suggest alternatives.
- You are building or scaling a serious web product — dashboards, portals, SaaS, or internal tools.
- You care about polish and reliability — not shipping a brittle prototype disguised as v1.
- You want a partner who proposes trade-offs honestly instead of disappearing after invoicing.
- You value TypeScript-era engineering: tests where they matter, ops that do not crumble at launch.
What you walk away with
Whether we build the whole roadmap or unblock one critical release, engagements are designed so you can keep momentum after we step back.
Request a tailored quote- Source code in your repository, sensible Git history.
- Environment and deploy notes aligned with how you operate.
- Accessible UI foundations and sensible performance defaults.
- Security hygiene: dependency updates, secrets never in client bundles.
- Optional augment: we stay on for releases and spikes.
Questions we hear before kickoff
- We are not technical — can we still work with you?
- Yes. Bring goals and pains; we translate them into phased software work and plain-language updates.
- How fast can you start?
- After a short brief and call, we align on a start window. Many projects begin within one to three weeks once scope is clear.
- Fixed price or retainer?
- We match the model to risk: phased fixed scopes for milestones, retainers when you need ongoing velocity and advice.
- Can you work with our existing team?
- Often. We integrate with your PM and designers, or pair with your engineers on hard parts — whatever ships the product fastest.
Ready to talk about your software — without committing to anything yet?
Send your brief or a few bullet points about your users and deadlines. If we are not the right fit, we will say so honestly and point you elsewhere.
scarlettechnologyvn@gmail.com · +84 868 320 014 · Hanoi, Vietnam
Explore
Web apps are multi-disciplinary — here is how we break it down
- Services
Product web apps, Next.js platforms, APIs, performance, and how we ship.
- Expertise
Architecture-first delivery, milestones you can plan around, and secure defaults.
- News & updates
Methodology and tooling notes from the workshop floor.
- Contact
Share timelines, constraints, and integrations — we reply within a business day.
Deep dive
Why teams choose Scarlet for mission-critical web products
Five additional detail sections that show exactly how we design, deliver, and scale serious web applications.
Discovery architecture
Product blueprint workshops with clear risk maps
We align product, engineering, and business in one room and leave with a documented plan that avoids expensive rebuilds.
- Domain model sketching
- Technical risk mapping
- Roadmap split by value delivery
Execution rhythm
Weekly shipping cadence your team can predict
Every sprint includes feature delivery, quality checks, and stakeholder-ready demos so progress is visible and measurable.
- Scoped weekly milestones
- Demo-first communication
- Proactive blocker handling
Reliability first
Systems that stay resilient during real traffic
From caching to graceful failure states, we design for unstable APIs and high-usage peaks from day one.
- Smart caching strategy
- Fallback UX patterns
- Error budget awareness
Performance culture
Performance budgets tied to business metrics
We track rendering cost, API latency, and conversion impact together to keep your platform fast where it matters.
- Core web vitals targets
- Interaction latency tracking
- Conversion-oriented tuning
Long-term ownership
Maintainable codebases your internal team can scale
We prioritize readable architecture, durable patterns, and documentation so your product evolves smoothly after launch.
- Feature-based structure
- Operational runbooks
- Handoff and enablement