Digital Signature
USB-token digital certificates for companies, household businesses and individuals - used for tax filing, social insurance submissions and signing e-invoices and e-contracts. Package advice and on-time renewal support.
Projects
12 Digital Solutions for Businesses in Vietnam
Independent advice and rollout of services from government-licensed providers: digital signatures, e-invoicing, e-contracts, T-VAN tax filing, I-VAN social insurance... Each solution links to the official public-service portal so you can verify licensed providers yourself.
Not tied to a single provider
I compare packages, prices and support levels across licensed providers, pick the best fit for your size and existing software - then handle rollout, renewals and troubleshooting with you.
Remote Signing
Sign from anywhere: private keys are kept securely in an HSM at the data center, so users sign on their phone or computer without plugging in a USB token. Ideal for mobile and multi-site teams.
TSA - Timestamping
A Timestamping Authority service that certifies the exact moment of signing, so digital signatures stay legally valid and verifiable even after the certificate has expired.
E-Invoicing
E-invoice rollout under Decree 254/2026/ND-CP (effective 1 July 2026): registration, issuance, error handling and integration with the sales and accounting software you already use.
E-Contracts
Draft, send and sign contracts fully online with digital signatures and central storage - cutting contract turnaround from days to minutes.
Accounting Software
Accounting software for SMEs and household businesses, linked to e-invoicing to automate bookkeeping, financial statements and tax returns.
E-Vouchers & E-Receipts
Issue personal income tax withholding certificates and e-receipts instead of paper - sent straight to recipients, easy to look up and archive.
TVAN - Tax Filing
A T-VAN e-data transmission service for filing tax returns and receiving tax authority notices quickly and reliably - even on peak deadline days.
Social Insurance IVAN
File social, health and unemployment insurance dossiers electronically via I-VAN: report headcount changes, adjust contribution levels and track processing results in one place.
Cybersecurity
Malware protection, monitoring and network defense that shield your business from attacks, ransomware and data leaks.
Information Security
Assessments, processes and policies that protect customer data and personal data in line with current Vietnamese regulations.
Integration API
Connect e-invoicing, digital signatures and e-contracts to your ERP, POS or online store via API - data flows automatically, with no double entry.
Websites & campaigns I run
A selection of digital transformation and marketing projects I have built and operate myself.
sofipos.com.vn
A Business Operating System (BOS) for SMEs and household businesses in Vietnam and ASEAN. Content SEO, bilingual VI/EN site and a complete product ecosystem.
chayhoavouu.com
Website for a vegetarian restaurant in Tan Phu, Ho Chi Minh City. Local SEO, area landing pages, the "Vô ฦฏu Bút" blog and Google Ads campaigns.
Media F&B Vegan
Multi-channel content for plant-based F&B: TikTok, Facebook Page, YouTube and Zalo OA, paired with brand music created with Suno AI.
Free 30-minute consultation with Phan Duy
Share your challenge - I will help you find the most suitable, cost-effective digital solution, even on a tight budget.