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Issue N°64 · Tallinn Bureau Reg. 12354921 · VAT EE102943256
00:00 EET · 59°26′N 24°45′E
BureauTallinn, Estonia
PracticePublic-sector technology
DisciplineSoftware · AI · Design
Registry12354921 · EE102943256

A bureau for public
infrastructure, & the
software beneath it.

64 Sixty Four OÜ · since 2024

Sixty Four is a Tallinn practice of engineers, designers and strategists building digital infrastructure for ministries, municipalities and the institutions that serve them. We work inside public tender frameworks — the boring, load-bearing part — and deliver systems that are simple, durable, and readable to the people who must live with them for a decade.

Read time · 4 min ✺ ✺ ✺ ✺ ✺ ✺ ✺ ✺ Serial №0064
01Capabilities
The four things we do
04 / 04 Services
§ 01.01

Software Development

Full-stackIntegrationsX-Road

Custom software built for the public sector's long timeframes. Web applications, registries, procurement integrations and back-office systems designed for reliability, auditability and a decade of service.

§ 01.02

AI Consultancy

StrategyLLMsEvaluation

Strategic and implementation advisory on AI in government. We audit what's ready for production, what isn't, and where machine learning changes a citizen's encounter with the state for the better.

§ 01.03

Project Management

Tender deliveryComplianceReporting

Structured delivery inside public tender frameworks. Transparent reporting, risk registers, and a defensible audit trail — handled so your technical leads can stay technical.

§ 01.04

Design Services

UX researchAccessibilityService design

User-centred design for services that must work for every citizen — the technically literate and the reluctantly online alike. WCAG, plain-language, and the slow craft of making bureaucracy legible.

02Dossiers
Selected work
03 projects on file
03Bureau
The people on the letterhead
03 partners
Partner · AI & Strategy
Julian Kaljuvee
julian.kaljuvee@sixtyfour.ee

Harvard-educated applied mathematician and former quantitative analyst at Goldman Sachs, Morgan Stanley and JPMorgan. Julian leads our AI and ML practice, having delivered enterprise AI for ARM, London Stock Exchange Group and ADNOC. He serves as Director of Predictive Labs and consulting AI Engineer at Microsoft Industry Solutions.

Partner · Delivery & Platform
Henrik Aavik
henrik.aavik@sixtyfour.ee

Full-stack engineer and project lead driving Sixty Four's operations and client delivery. Henrik manages key accounts — including the Tendly platform — and coordinates the company's public-sector tender portfolio, ensuring every engagement lands on time and to specification inside government procurement frameworks.

Partner · Design & PM
Karola Mahhova
karola.mahhova@sixtyfour.ee

Design and project-management professional bridging creative vision with structured delivery. Karola brings a user-centred approach to interface design and project coordination, ensuring deliverables meet both quality bars and public-sector compliance requirements — not one at the expense of the other.

04Correspondence
Write to the bureau
Reply within 2 working days

Looking for a
partner for your
next public-sector
project?

Tell us the brief — the mandate, the constraints, the deadline — and we'll write back with a sober read on whether we're the right people for it.