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Stuart RiveroSR

Stuart Rivero

Staff/Senior Software Engineer

£700/day
London, GB
15+ years

Average response time: 1 hour

About Stuart

I'm a senior software engineer with a passion for AI, software development and turning ideas into useful products. I enjoy solving complex problems, learning new technologies and helping others bring projects to life. Outside of work, I enjoy cycling, travelling and connecting with interesting people who share a curiosity for technology and innovation.
  • Spanish

    Native or bilingual

  • French

    Basic

  • English

    Native or bilingual

  • Italian

    Basic

  • German

    Basic

Can work on-site
London (up to 50km)

Experience

  • Lendable via Build Circle
    Senior Software Engineer (Contract)
    April 2026 - July 2026 (3 months)
    London, UK
    Developed a new Pension application integrating with the Wealth Kernel platform via REST APIs and webhooks, exposing functionality through GraphQL for the Lendable mobile and web applications.
    • Built and maintained scalable backend services using Kotlin and http4k, with event-driven messaging to support asynchronous workflows and reliable integrations.
    • Technologies: Kotlin, http4k, GraphQL, REST APIs, Webhooks, Messaging.
    • Integrated AI-assisted development into the engineering workflow, using Claude to accelerate implementation and Augment to perform first-pass Pull Request reviews, improving development efficiency and code quality
    Kotlin API REST Back-End development
  • Engine by Starling via Build Circle,
    Senior Software Engineer (Contract)
    August 2025 - April 2026 (8 months)
    London, UK
    Integrating user and group data from Entra and Okta into the Client Tenant environments by implementing a SCIM-compliant API. This reduces on-boarding and maintenance time for every user.
    • • Lead the initial design and implementation of the SCIM API.
    • • Java 21, Guice, JAX-RS, Gradle, Postgres.
  • M&S via Crosstide (Formerly 101 Ways),
    Senior Software Engineer (Contract)
    March 2024 - June 2025 (1 year and 3 months)
    London, UK
    Developing micro-service applications for the Colleague Experience team.
    • • Built a high-priority integration service from requirements in Kotlin, with GitHub actions and Azure within 8 weeks through pair programming for transforming and publishing store and employee data from internal systems to a third party to meet a critical delivery deadline.
    • • Integrated Location data from Kafka into the publishing pipeline
    • • Led discovery to assess and plan the migration of a legacy on-premises system to Azure, identifying key dependencies, risks, and cloud-native opportunities.
    • • Individually built a Kotlin-based API in Azure within 8 weeks via pair programming, integrating with Active Directory to securely expose colleague information to mobile and web applications.
    • • Upgraded a Java identity testing library to latest M&S standards.
    • • Migrated New Relic Observability (Alert, SLO, Dashboards) to Dynatrace
    • • Java, Kotlin, OpenAPI, Kotest, JUnit, GitHub, Test Containers, Gatling, Docker, Micronaut, PostgreSQL, New Relic, Dynatrace, Kafka and Azure.

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Education

  • Kotlin For Java Developers (Coursera)
    2018
    Kotlin For Java Developers (Coursera)
  • London Markets Insurance LM1
    2012
    London Markets Insurance LM1

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