Language and Networking
Master one primary language and understand how requests flow.
- Java, Go, or Node.js
- HTTP and REST
- Linux and Git
Learning direction
Backend Development
Start with APIs, databases, and system boundaries to build reliable, observable, deployable services.
Skill map
From foundations to real delivery
Data and Domain
Make the data model express real domain constraints.
- SQL and indexes
- Transactions and concurrency
- Input validation and error models
Reliable Services
Stay predictable under failures, retries, and changing traffic.
- Caching and queues
- Authentication and security
- Logs, metrics, and traces
Delivery and Design
Prove system boundaries with tests, documentation, and deployment.
- Automated testing
- Containers and deployment
- Architecture decisions and tradeoffs
Put the skills to work
Recommended learning and practice items
View all in this direction →CompetitionBackendAny levelDue Oct 10, 2026
DeepInfra Round 1 (Codeforces Round 1126, Div. 1 + Div. 2)
The official source provides no summary. Open the item to read the original.
CodeforcesFreeGlobal
CompetitionBackendAny levelDue Oct 12, 2026
Codeforces Round (Div. 2)
The official source provides no summary. Open the item to read the original.
CodeforcesFreeGlobal
CompetitionBackendAny levelDue Oct 12, 2026
Codeforces Round (Div. 1)
The official source provides no summary. Open the item to read the original.
CodeforcesFreeGlobal
CompetitionBackendAny levelDue Oct 14, 2026
Educational Codeforces Round 195 (Rated for Div. 2)
在线编程竞赛，比赛时长约 2 小时。开始后不能再报名。
CodeforcesFreeGlobal
CompetitionBackendAny levelDue Oct 17, 2026
WorldQuant Round 1 (Codeforces Round Div. 1 + Div. 2)
The official source provides no summary. Open the item to read the original.
CodeforcesFreeGlobal
CompetitionBackendAny levelDue Oct 10, 2026
Codeforces Round (Div. 2)
在线编程竞赛，比赛时长约 3 小时。开始后不能再报名。
CodeforcesFreeGlobal
CompetitionBackendAny levelDue Oct 12, 2026
Codeforces Round (Div. 2)
在线编程竞赛，比赛时长约 3 小时。开始后不能再报名。
CodeforcesFreeGlobal
Open sourceBackendBeginnerReady to start
Alerting: Strange NoData alerts
Using Grafana alerts with Threema Gateway to monitor a self scripted node exporter for some services throws every four hours the following alert: This seems to me like a bug because the silence URL is not correct here (other messages have the correct URL https://my-fqdn.tld/…) and silencing does not show any effect. T…
grafana/grafanaAbout 4 hr