[Hiring] Senior Software Engineer @Sumara Technology

Role Description

We are looking for a Senior Software Engineer to design, build and run backend services that connect our platform with external partners. You will work with product, architecture, security and operations to turn partner requirements into reliable, well-tested services. This is a hands-on backend role in TypeScript on AWS. You will own outcomes from design through production, and you will help raise the engineering standard across the team.

What you will do

• Design and build event-driven, serverless and containerised services on AWS.
• Integrate with third-party REST APIs, including authentication, retries, rate limits and error classification.
• Build secure inbound endpoints that verify signatures, handle duplicate delivery and acknowledge work safely.
• Design failure handling for partial and uncertain outcomes, including dead-letter queues, recovery and operator procedures.
• Define and evolve versioned API and event contracts that stay backward compatible for consuming teams.
• Handle personal and financial data responsibly, covering data minimisation, encryption, redaction in logs and retention.
• Build and maintain infrastructure as code and CI/CD pipelines, with automated unit, contract and behaviour tests.
• Set up observability, including structured logs, metrics, tracing, alarms and runbooks.
• Support partner onboarding, sandbox testing and go-live readiness.
• Review designs and code from other engineers, and document decisions clearly.

Qualifications

• Commercial backend development experience in TypeScript or a similar typed language, including production services.
• Experience building and operating distributed or event-driven systems, including queues, retries and idempotency.
• Hands-on experience with AWS serverless or containerised workloads and infrastructure as code.
• Experience integrating with third-party APIs, including authentication, versioning and error handling.
• Strong testing discipline, with the ability to design tests that catch real defects.
• Experience owning production systems, including incident response and post-incident improvement.

Requirements

• Experience with webhook-based integrations or HTTP message signing.
• Experience with OAuth 2.0 or other delegated authorisation models.
• Experience in a regulated domain such as financial services, payments or identity.
• Familiarity with schema-first design (for example zod, OpenAPI or AsyncAPI).
• Experience with Kotlin or other JVM languages.
• Experience with CI/CD tooling such as GitHub Actions.

Benefits

• Competitive salary.
• Market-standard EOSB and health insurance.
• Work with elite, high-performance engineering teams building globally used trading systems.
• Team-building events, mentorship, and opportunities for continuous professional growth.

Company Description

Location: Remote, based in the UAE. Client is in the UK and works UK hours- so some alignment in working hours is preferred. Sumara will sponsor a UAE visa and work permit.