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OVO Tech Blog

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aws lambda stepfunctions monitoring

Monitoring Step Function based workflows

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I'm an engineer for the Orion Migrations team. The job we do as a team is to allow seamless as possible migration of users and all their data from a legacy system to the Orion platform. This is something which sounds simple at first but becomes more complicate…

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Building a simple serverless Slack bot for exporting channel messages as a timeline.

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Moving fast and making things. This post has two goals - to share the story of a quick tool we created to solve a problem, and share a template that can be adapted easily for any Slack bot slash command to run a Python script in AWS Lambda.…

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We made AWS cheaper, safer and more accountable - here’s how!

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A high level overview of the problems we found with our AWS account architecture and how we solved them…

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Cloud Networking

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A Shared Network Connecting cloud projects together and to on-prem services is a standard problem of organisations. At OVO we use the 10.0.0.0/8 CIDR block for our internal network. This range is split into subnets for each office, AWS or GCP project, or on-pr…

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Production Engineering devops aws networking

Using Route53 Resolver Rules

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At OVO we have many cloud projects which need connectivity to services in our datacenter. We have VPNs setup to securely route connections between projects and on-prem services. One issue with this configuration is name resolution within AWS VPCs. The DHCP op…

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stepfunctions lambda aws step function

Orchestrating Serverless - a step in the right direction

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This blog post looks at our experience of using AWS Step Functions to help us migrate customers into a new OVO energy platform.…