We work with a wide variety of technologies, mostly open source. Here are some examples:
Hosting, Containerization, Networking
- Cloud hosting (AWS, GCE, Azure, Linode)
 - Containerization (Docker, Kubernetes, ECS)
 - Colocation environments
 - Networking (VPC, subnets/routing, cross-cloud)
 
Web Front-End Tech
- Load balancers (ELB/ALB/NLB, HAProxy, Envoy Proxy)
 - CDNs (CloudFront, CloudFlare, Akamai, StackPath)
 - Front-end caches (Varnish, Squid)
 - HTTP front-end servers (NGINX, Apache)
 
Application Languages, Environments
- Node.js (Express, pm2, npm)
 - Ruby on Rails (Unicorn, Passenger, Puma, rbenv)
 - Python (WSGI, Tornado, django)
 - Java (Tomcat, Jboss, standalone apps)
 - PHP (php-fpm, mod_php)
 - Others (Go, Erlang, Elixir)
 
Deployment, Dev Support
- Deployment and integration tools (Docker, Fabric, Capistrano, Jenkins, CodeDeploy)
 - CI/CD (GitHub Actions, Jenkins, CircleCI)
 - Source code control systems (git, Subversion)
 - Automated testing (Selenium, Cucumber)
 
Databases, Key-Value Stores, Data Stores
- SQL (MySQL, PostgreSQL, RDS)
 - Key/value, column and document stores (MongoDB, DynamoDB, Cassandra)
 - Caching/in-memory (Redis, memcached, ElastiCache)
 - Replication, clustering, failover
 
Queuing, Job Dispatch, Stream Processing
- Queuing/messaging (Kafka, RabbitMQ, SQS)
 - Job management (Kue, Sidekiq, delayed_job)
 - Stream processing (Spark, Kafka Streams)
 - Serverless (AWS Lambda, Cloud Functions)
 
Security
- Firewalls (IPtables, security groups, pf, CheckPoint)
 - SIEM (ELK, Splunk, SolarWinds)
 - Intrusion Detection (GuardDuty, Zeek, Tripwire)
 - IdP/SSO integration (OAuth, SAML)
 
Operations Management
- Infrastructure as Code (Terraform, CloudFormation)
 - Configuration managers (Chef, Puppet, Ansible)
 - Monitoring and graphing (Prometheus, Nagios, CloudWatch, Grafana)
 - Backup tools (EBS snapshots, S3 lifecycles, rsnapshot, XtraBackup)
 - Log management (Elastic/ELK Stack, CloudWatch, Splunk)