Sling Money

About the Company

Sling Money aims to create a world where sending and receiving money is effortless. The app allows users to pay people, and not numbers - no account numbers, IBAN or sort code needed, all you need is the recipient's name to send them money. The app leverages blockchain technology to allow for almost instant money transfers, in any currency, for a negligible fee. Sling Money is available in 70+ countries and is available in the Android and iOS app stores. Sling Money is a product by Avian Labs.

Listed Jobs

Company Name

Sling Money

Job Title

Android Engineer

Job Description

Job Title: Android Engineer Role Summary: Build, scale, and secure the Android money‑transfer app using Kotlin, Jetpack Compose, Apollo GraphQL, Room, and custom Solana integration; optimize performance and user experience across a wide range of devices. Expactations: Product‑oriented, collaborative communicator who shares progress early, mentors teammates, and drives high‑quality, fast‑moving development. Key Responsibilities: - Design, develop, and ship new features in the Android app. - Collaborate with product, design, and backend teams to define and deliver compelling user experiences. - Optimize performance and reliability on entry‑level to flagship Android devices. - Maintain and evolve core security and blockchain (Solana) integration modules. - Conduct code reviews, unit/integration testing, and iterative improvements. Required Skills: - Kotlin programming, Jetpack Compose UI development. - Apollo GraphQL networking, Room persistence, and modern Android architecture patterns. - Experience with blockchain integration (Solana preferred) and cryptographic security practices. - Android performance optimization, especially with Compose animations. - Strong verbal and written communication; ability to explain technical concepts clearly. Required Education & Certifications: - Bachelor’s degree in Computer Science, Software Engineering, or related field, or equivalent professional experience.

London, United kingdom

On site

30-10-2025

Company Name

Sling Money

Job Title

Junior Backend Engineer

Job Description

**Job Title** Junior Backend Engineer **Role Summary** Join a small, collaborative team to design, build, and maintain high‑performance backend services that will support a global fintech platform. Work primarily in Go with Postgres, GraphQL, Protocol Buffers, AWS, and blockchain (Solana) infrastructure, delivering scalable solutions that can serve billions of users. Drive product quality, ownership, and rapid iteration while learning new technologies and contributing to architectural decisions. **Expectations** - Eager to learn and quickly acquire new technical skills. - Proactive, self‑motivated, and able to take end‑to‑end ownership of features. - Comfortable with ambiguity; capable of exploring poorly defined problems. - Strong communication skills—able to explain technical concepts to non‑technical stakeholders. - Collaborative mindset: ask questions, share knowledge, and support teammates. **Key Responsibilities** - Design, develop, test, and deploy backend services in Go. - Model and manage data using PostgreSQL; write efficient queries and maintain schema migrations. - Implement GraphQL and Protobuf interfaces to expose APIs to front‑end and external systems. - Build and maintain AWS‑based infrastructure (compute, storage, monitoring, CI/CD). - Integrate Solana blockchain components where required. - Collaborate with product, UX, and DevOps teams to translate requirements into reliable, scalable solutions. - Participate in code reviews, automated testing, and performance optimisation. - Release early, iterate based on feedback, and ship features in an agile environment. - Document designs, APIs, and operational procedures. **Required Skills** - Proficiency in Go (backend programming). - Experience with relational databases, especially PostgreSQL. - Familiarity with GraphQL and/or gRPC/Protocol Buffers. - Basic understanding of cloud services (AWS) and containerised deployment. - Exposure to or interest in blockchain technology (e.g., Solana). - Strong problem‑solving ability and a drive for clean, maintainable code. - Excellent communication and teamwork skills. **Required Education & Certifications** - Bachelor’s degree in Computer Science, Software Engineering, or a related field, or equivalent hands‑on experience. - No specific certifications required. - Demonstrated portfolio of projects or contributions to open source is a plus.

London, United kingdom

Hybrid

Junior

16-12-2025