Martin Krizan
backend & full-stack engineer
I build the parts nobody screenshots. Catalogs, routing, queues, the cron job that has to run at 04:00. Most of what I ship is still running years later, which I take as the only review that counts.
- based in
- Prague, Czechia
- shipping since
- 2010 — 16 years
- works with
- node, typescript, php, mongodb, mysql, redis, docker
- in production
- 3 systems
- writing
- 3 posts
- reachable at
- martin.krizan@itrinity.com
Recent writing
all posts- Push to deploy in forty lines of shellA webhook, a shared secret and a git pull. No runners, no YAML, no monthly bill.
- A MongoDB you don't have to babysitBackups, indexes and the short list of alerts that are actually worth being woken up for.
- Queues are not a databaseA short list of the ways I learned this, most of them expensive, one of them twice.
Work
everything else
EmailListVerify
TODO — email verification
Bulk and real-time email verification: strips invalid, disposable, catch-all and spam-trap addresses before a campaign goes out.
liveTODO
Warmup Inbox
TODO — email deliverability
An inbox warmup network: thousands of real mailboxes exchange mail with yours so a new sending domain builds a reputation instead of landing in spam.
liveTODO
Airway.cz
2020 — last-mile logistics
Same-day courier work in Prague: route optimisation, fleet planning and dispatch behind a city-wide delivery operation.
livephpvroomosrm
Pilulka.cz
TODO — online pharmacy
The largest Czech online pharmacy: catalogue, orders and same-day delivery, with 30+ physical pharmacies as pickup points.
pastTODO
Elsewhere
- githubgithub.com/mnohosten