The process took 3 months and is still in progress, involved recruitment pre-screening (20 min), data science technical interview I (60 min), a test task that (6-8 hours) to complete, (30 min) task review with questions, network security technical interview 60 (min), data science tech interview II (45 min), tech interview III (45 min), manager technical interview on DNS, network, cybersecurity and motivation (45 min). Longest, most sophisticated recruitment process I've taken part in, which ultimately regretted to be involved in. On another side never heard back of feedback on none of the stages, and replies from recruiter came always with a 1-3 business day delays.