Build narrow products that can actually ship
I prefer focused workflows over broad platforms: one painful business process, clear boundaries, and enough product discipline to avoid fake scope.
Full-stack SaaS developer
Dylan Buchi
I build focused SaaS products and product-grade web apps: sharp Next.js interfaces, typed backends, integrations, auth boundaries, and the release discipline to make small systems trustworthy.
Next.jsTypeScriptSaaS systemsAuth & permissionsLaunch checks
Evidence over adjectives
What you get.
I am a self-taught software engineer focused on the part of development where product judgment, implementation quality, and release readiness meet. I build with React, Next.js, TypeScript, Python, PostgreSQL, and the surrounding stack needed to ship useful web products.
- Current proof
- Built and deployed a controlled-access bookkeeping workflow SaaS with auth, integrations, storage, billing flow checks, and launch gates.
- Release discipline
- Tests and manual proof steps across permissions, public links, uploads, CSV safety, provider boundaries, and production smoke checks.
- Public history
- 100+ public GitHub repositories, internship experience, freelance work, open-source contributions, and 50+ learning builds.
Make trust boundaries visible in the product
Auth, roles, client links, uploads, billing, provider APIs, and public routes need explicit behavior, not vague "it should be fine" assumptions.
Keep learning tied to real delivery
My older public projects show range; the current direction is turning that range into deployable SaaS systems with clearer release proof.
Experience
Built under pressure.
The strongest signal is the current SaaS work: product definition, interface design, backend wiring, integration boundaries, deployment, testing, and launch-readiness proof handled end to end.
Independent Full-Stack Developer / SaaS Builder
Private product studio / Substantly
Sep 2024 - Present
Geneva, Switzerland - Remote
- Built and deployed a controlled-access SaaS for bookkeeping firms to collect explanations and receipts for uncategorized QuickBooks Online transactions.
- Implemented firm-scoped auth, owner/admin/staff permissions, secure client response links, receipt uploads, reminders, review queues, CSV import/export, and gated access.
- Integrated read-only QuickBooks Online import, Stripe sandbox billing flows, Resend transactional email, S3-compatible object storage, and Vercel production checks.
- Created launch-readiness proof around QBO no-write-back boundaries, CSV formula safety, public-link access, receipt storage, scheduler authorization, billing containment, backup/restore, and browser smoke checks.
Software Engineer Intern
acheteur.ch
Jun 2024 - Aug 2024
Lausanne, Switzerland - Hybrid
- Contributed React and Next.js components to a shared TypeScript monorepo for a large-scale real estate application.
- Implemented Figma-based UI with reusable component patterns and strong attention to visual fidelity.
- Worked in an Agile workflow to deliver frontend features, refactors, and component improvements.
Self-Taught Software Engineer
Independent study and projects
Jul 2019 - Jun 2024
Geneva, Switzerland
- Built 50+ projects with React, Next.js, Python, Node.js, databases, and automation while studying full-stack development, data structures, and system design.
- Completed 30+ online courses, delivered freelance work, and developed a practical habit of learning through shipped artifacts.
Open Source and Freelance Work
The Algorithms / SwissBorg
2020 - 2021
Remote
- Merged 13 Python pull requests into The Algorithms, improving type annotations and resolving mypy dependency issues.
- Built a SwissBorg Discord bot with automated responses, admin controls, uptime checks, and data-backed command handling.
Selected work
Best proof first.
The strongest work is the current SaaS build. Public repositories still matter, but they are supporting evidence next to real product definition, trust boundaries, and deployment proof.
Controlled access
Workflow
QBO transaction clarification
ImportRequestReviewExport
Controlled-access SaaS
Substantly
A focused bookkeeping workflow product for collecting explanations and receipts on uncategorized QuickBooks Online transactions without writing back to QuickBooks.
- Firm-scoped owner/admin/staff permissions
- Secure client response links, receipt uploads, reminders, and review queues
- Read-only QuickBooks Online import, CSV import/export, and no-write-back boundaries
- Stripe sandbox billing flows, Resend email, private object storage, health checks, and launch gates
Next.jsTypeScriptPostgreSQLSQLiteQuickBooks OnlineStripeResendS3/R2 storageVitestPlaywrightVercel
Public product visuals
The transaction wedge is visible.
Clean Substantly screenshots from the public product surface, using illustrative sample data only. They show the queue, client clarification loop, and review-before-export flow without private records, tokens, or customer data.
Problem
Bookkeeping firms still chase unclear QuickBooks transactions through email and spreadsheets, while clients need a low-friction way to answer without QuickBooks access.
Workflow
Import transactions, choose what needs context, send secure client links, collect explanations and receipts, review answers, then export clean CSV results.
Trust boundary
QuickBooks Online import is read-only. Substantly does not write categories back, attach receipts to QBO, auto-categorize with AI, or replace practice management.
Production posture
Signup is gated, request access is manual, production rejects local storage/database fallbacks, and hosted operation uses Postgres, private object storage, email, scheduler auth, and health checks.
Private SaaS prototype
SoloFocus
A CRM-style SaaS prototype exploring Gmail and Google Contacts integrations, Stripe billing, scheduled workflows, and a PostgreSQL/Prisma architecture.
Next.jsTypeScriptPostgreSQLPrismaStripeGoogle APIs
Private developer tooling
Codex Workflow Kit
A repo-native workflow layer for auditable AI-assisted coding: task state, briefs, handoffs, review and test evidence, closeout gates, package hygiene, and bounded proof commands.
Node.jsCLI toolingGit hooksWorkflow stateTest gatesPackage hygiene
Python automation utility
Folder Synchronizer
A one-way source to replica folder sync tool built around predictable file operations, logging, and command-line practicality.
PythonFile I/OCLIAutomation
Stack map
Tools with a job.
The useful signal is not a long list of names. It is the ability to connect interface polish, server behavior, data modeling, integrations, deployment, and release checks around one narrow product workflow.
Interface systems
Next.jsReactTypeScriptTailwind CSSshadcn/ui
Backend logic
Node.jsServer-side authREST APIsSchedulersPythonFlask
Data and storage
PostgreSQLSQLiteMongoDBPrismaCSV workflowsS3/R2 storage
Integrations
QuickBooks OnlineStripeResendOAuthGoogle APIs
Quality and release
PlaywrightVitestVercelHealth checksBackup rehearsalSecurity headersWorkflow evidence
Product range
SaaS MVPsClient workflowsOpen sourceAutomationFigma implementation
Ask this portfolio
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Source-limited answers
Hiring, project-fit, and proof questions
Portfolio briefing assistant
Curated mode - no personal-data memory
Ask a hiring or project-fit question. I will answer only from Dylan’s resume, portfolio, and selected project evidence.
Curated portfolio data
Contact
Bring a workflow problem.
I am most useful when a product needs to move from fuzzy idea to working system: SaaS MVPs, interface cleanup, auth and permissions, API integrations, automation, launch checks, or a second set of engineering eyes.