Kieran Oyelaran
Software Engineer, Backend (Go, Python, AWS)
Bristol, BS1kieran.oyelaran@example.com07700 900318Summary
Backend software engineer with six years building payment and energy services in Go and Python on AWS. Designed the settlement service that now reconciles every card payment on the platform overnight with no manual corrections since launch, and halved the pages the on-call rota receives. Writes design documents people read and code the next engineer can change without fear.
Experience
Software Engineer II, Avonbank Payments
– Present
Bristol
- Designed and built the settlement service in Go that reconciles around 1.8 million card payments a night against the acquirer files, replacing a batch job that needed manual corrections most weeks.
- Cut p99 latency on the payment authorisation path from 390 ms to 150 ms by removing two synchronous calls and adding a read-through cache in Redis.
- Ran the team's incident reviews for a year; pages per on-call week fell from nine to four and every review produced a tracked fix.
- Wrote the design and migration plan to move three services onto Kubernetes on AWS, delivered with no customer-facing downtime and signed off under the company's FCA change-control process.
Software Engineer, Greenfinch Energy Software
–
Swindon
- Built the half-hourly meter reading ingestion API in Python and PostgreSQL that handles readings from 600,000 smart meters a day.
- Replaced an overnight CSV import with an event-driven pipeline on SQS, so supplier dashboards update within minutes instead of the following morning.
- Introduced contract tests between four services, which caught breaking API changes before release and ended a whole class of production incidents.
Education
BSc (Hons) Computer Science, First Class
University of the Severn Vale, Gloucester
Final-year project on consensus in distributed key-value stores; placement year at a logistics software firm.
Skills
- Go
- Python
- PostgreSQL
- AWS (ECS, Lambda, SQS)
- Kubernetes
- Redis
- Kafka
- REST and gRPC
- Terraform
- CI/CD with GitHub Actions
- Observability (Prometheus, Grafana)
- System design
Certifications
- AWS Certified Developer – Associate, Amazon Web Services,