Technology — Back-end
APIs that stay up.
Node, Python and Go services with proper observability, queues, caching and security from day one.
What does back-end development cover?
Back-end development at S3A Technologies covers Node, Python and Go services built with observability, queues, caching and security configured from the first sprint rather than added after an incident. Scope includes REST and GraphQL APIs, background workers, scheduled jobs and third-party integrations, all wired to metrics, logs and traces. We design against the point where traffic, data volume and team size have all doubled, because that is when architectural shortcuts become expensive. Four stages structure the work. Design agrees the data model, service boundaries and API contracts before code is written. Build delivers typed services, queues and caches connected to dashboards and structured logging. Test runs unit, integration and load tests on every commit against realistic data shapes rather than trivial fixtures. Operate establishes alerts, runbooks and on-call rotation so problems surface before users report them. Observability is the part most projects defer and then regret.
What this is
Servers that don’t page you.
REST and GraphQL APIs, background workers, scheduled jobs and integrations — all wired to metrics, logs and traces. We design for the day when traffic, data and team size all double.
How we do it
Design, build, test, operate.
- 01
Design
Data model, service boundaries and API contracts agreed before any code is written.
- 02
Build
Typed services, queues and caches wired to dashboards and structured logs.
- 03
Test
Unit, integration and load tests run on every commit — with realistic data shapes.
- 04
Operate
Alerts, runbooks and on-call rotations set up so issues are spotted before users notice.
Proof
Where this shipped.
The parts nobody sees until they break — exam scoring and grade publishing in one case, database cleanup and hardening in the other.
Lords Education
A customised Moodle LMS that moved an entire school online during lockdown — courses, assignments, timed exams, evaluation and grades on one platform, with zero campus visits required.
→ 100% files cleanedResponse Informatics
Malware incident response and full site recovery across three cleanup tracks — files, database and plugins — leaving zero active redirects and a documented playbook behind.
→