01
Reliability & failover
High-availability architecture, failover behaviour and resource efficiency across on-prem and cloud clusters — designed so a switch is a non-event.
YEARS ON DATA
0+
ON CALL · LONDON, UK
Databases that hold when everything else fails over.
Senior Staff Database Reliability Engineer at Diligent. I keep large multi-engine estates fast, observable and boring — across SQL Server, PostgreSQL, MariaDB, ScyllaDB and AWS.
ENGINES RUN
0
MANAGED INSTANCES
0+
CLUSTERS
0+
CUSTOMERS
0+
02 — WHAT I ACTUALLY DO
02
Performance at the engine level
Wait statistics, execution plans, Extended Events, pg_stat_statements. Query, index and configuration tuning that holds under real load.
03
Observability & automation
Alerting that means something, and PowerShell / T-SQL / AWS CDK tooling that removes the manual step instead of documenting it.
SQL ServerPostgreSQLMariaDB / MySQLCassandra / ScyllaDBCouchbaseAWS RDS & AuroraAWS CDKPowerShellPythonT-SQL
01 — SELECTED WORK
3 OF MANY CASE STUDY / 01
Dynamic memory allocation for SQL Server failover clusters
Clustered instances used to land on a node sized for someone else's workload. I led the design of allocation that follows the workload through failover, so post-failover contention disappeared and performance stayed consistent across every node.
- OUTCOME
- No post-failover contention
- SCOPE
- Clustered production estate
- ROLE
- Design lead
CASE STUDY / 02
Database exporter portal
One interface to operate and analyse a large multi-engine estate — inventory, metrics and exports in a place engineers actually open, instead of a hundred consoles.
CASE STUDY / 03
glideplan.org
Flight planning for glider pilots. My own product, end to end — the same reliability instincts, in thinner air.
03 — THE PATH
2022 — NOW
Senior Staff Database Engineer
Own reliability, performance and operational stability of critical data platforms across relational and distributed engines, on-prem and in AWS.
DILIGENT
2018 — 2022
Senior Database Engineer
Performance and availability work across a growing multi-engine platform. London.
DILIGENT
2017 — 2018
Database Administrator
Payments infrastructure. Cambridge.
CASHFLOWS
2015 — 2017
Database Administrator
Tuned server architecture from wait statistics, wrote the internal T-SQL standards, implemented Always On Availability Groups as the DR backbone.
RATESETTER
2014 — 2015
Development DBA
Databases for stand-alone QA instruments, integrated with customer LIMS and MES systems under 21 CFR Part 11.
CERULEAN INSTRUMENTATION
2011 — 2014
SQL Developer / DBA
ERP and reporting work, plus EDI integrations across manufacturers and couriers. Where the performance obsession started.
REGENERSIS
CERTIFICATIONS
- PostgreSQL Administrator DB
- MariaDB Database Administration DB
- AI_devs 4 Builders AI
EDUCATION & LANGUAGES
Engineer's degree, Computer Science
Bialystok University of Technology · 2006—2011
Polish — nativeEnglish — full professional
04 — CONTACT
Got a platform that has to stay up?
Reliability reviews, performance deep-dives, or a hard production problem nobody has cracked yet — start with an email.