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# Senior Platform Engineer

- **Company:** Welcome Pickups
- **Location:** UK
- **Experience:** Expert
- **Salary:** £82,392.0
- **Contract:** Permanent contract
- **Skills:** Amazon Web Services, Amazon S3, JIRA, Microsoft Azure, Backup Devices, Cloud Computing, Databases, Continuous Integration, Distributed Systems, Elasticsearch, Key Management, PostgreSQL, Uptime, Message Broker, PostGIS, RabbitMQ, Ruby on Rails, Redis, Mixpanel, Software Engineering, Twilio, Circleci, Google Cloud, Delivery Pipeline, Technical Debt, Backend, Kubernetes, Information Technology, Cloudflare, New Relic (SaaS), Docker
- **Published:** October 23, 2026
- **Apply:** https://www.adzuna.co.uk/jobs/details/5937941176

## About the Role

* 8+ years of software engineering experience, with strong backend and systems experience.
 * BS/MS degree in Computer Science or a related subject.
 * Proven experience operating and scaling production systems.

Technical Skills

 * Strong understanding of system design, distributed systems and performance trade-offs.
 * Strong PostgreSQL skills on large databases: query and index tuning, replication, large-table migrations, backups.
 * Experience with cloud infrastructure (Azure preferred), Docker and infrastructure-as-code.
 * Experience with Redis, Elasticsearch and a message broker (RabbitMQ or similar) at production scale.
 * Experience with observability, monitoring and incident management.
 * Strong security fundamentals: access control, networking, secrets.
 * CI/CD experience, including zero-downtime deploys.
 * Organised and a clear writer, comfortable working in Jira.
 * A hands-on mindset: able to go from strategy to implementation.

Additional experience considered a plus

 * Experience with Ruby on Rails, Sidekiq, Puma and PostGIS, or similar.
 * Exposure to compliance frameworks (SOC 2, ISO 27001).
 * Experience with AWS or Google Cloud alongside Azure.
 * Experience moving a long-running application to containers or Kubernetes.
 * A travel, mobility or marketplace background with real-time operations.

## Description

* A large Ruby on Rails application, with Sidekiq and RabbitMQ
 * A large, fast-growing PostgreSQL/PostGIS database, plus Elasticsearch and Redis
 * Azure as our main cloud, with AWS S3 and Google Cloud
 * Cloud66, Cloudflare, CircleCI and Docker
 * New Relic and Rollbar for monitoring, and Mixpanel for product analytics
 * 30+ external services, including Checkout.com, Twilio, Braze and hotel booking systems

Responsibilities

Reliability & Uptime

 * Define and track reliability targets (SLAs/SLOs) for our core flows: bookings, ride matching and payments.
 * Set up and run the incident process and on-call, and reduce recovery times.
 * Improve monitoring and alerting across the platform (New Relic, Rollbar).

Performance, Scalability & Data

 * Lead architecture decisions for scaling our backend systems and services.
 * Find and fix performance bottlenecks across the application, background jobs and database.
 * Improve the performance of our large, fast-growing PostgreSQL database:

 * tune slow queries and indexes
 * plan data growth and archiving
 * manage replication, backups and restore drills
 * change large tables without downtime

Make sure the platform handles peak season and partner growth smoothly.

Infrastructure, Security & Compliance

 * Define and evolve our infrastructure strategy on Azure, and balance performance, reliability and cost.
 * Define and enforce security best practices: access control, secrets management, and the security of our build and release pipeline.
 * Prepare the platform for compliance: payment-data rules (PCI), GDPR, and over time SOC 2 / ISO 27001.

Developer Experience

 * Improve internal tooling, CI/CD and deployment workflows so engineers can ship faster and safer.

Technical Roadmap & Collaboration

 * Keep the backlog of technical work (upgrades, technical debt, performance, security) organised and ranked in Jira, and prioritise it together with the Product Manager.
 * Write technical docs, runbooks and development plans, and break them into Jira tickets with clear requirements.
 * Participate in team ceremonies (grooming, planning, kick-off meetings, retrospectives & demos).