Java/Kotlin Team Lead - London - 6 months - Circa £650pd - 3 days pw
We are partnered with a tech client who are looking for a Lead Backend Engineer with strong experience in Java and/or Kotlin to take a key technical leadership role within a backend-focused engineering team
Technical Leadership & Influence
* Lead design discussions, technical deep dives, and knowledge-sharing initiatives
* Anticipate technical risks and proactively propose scalable, secure solutions
* Influence product and platform decisions through strong technical insight
Hands-on Software Development
* Develop high-quality backend services using Java (17+) and frameworks such as Spring Boot or Micronaut
* Build resilient, high-throughput services supporting secure transaction processing
* Design and implement integrations with external systems including payment gateways, banks, and fraud platforms
Core Skillset:
* Proven experience as a Lead Java Engineer in backend-heavy, multi-level engineering teams
* Strong expertise in Java 17+, with Spring Boot or Micronaut; Kotlin experience is a bonus (or willingness to learn)
* Hands-on experience with event-driven architectures, Kafka, microservices, and enterprise integration patterns
* Solid understanding of payment systems and PSP integrations, including fraud, tokenisation, and settlement flows
* Experience with cloud infrastructure (Azure preferred), Kubernetes, and CI/CD pipelines
* Working knowledge of relevant regulatory standards such as PCI DSS, SCA, and PSD2s
* Experience working in Agile/Scrum environments with a DevOps and test-driven mindset
Nice to have
* Experience with IAM platforms such as Okta, Auth0, Keycloak, or ForgeRock
* Knowledge of identity and security standards including OpenID Connect, OAuth2, JWT, SAML, and MFA
* Broader cloud exposure across Azure, AWS, or GCP
If this is of interest, please send an updated CV and we can set up a call?