Senior Backend Engineer

About Slash

Slash is a hi-tech startup studio with a mission to build tech AI-powered products and scalable digital platforms that create real-world impact. Since 2016, we’ve partnered with ambitious enterprises and government organizations to design, engineer, and launch cutting-edge solutions — with Generative AI at the core of what we do. We specialize in AI-powered application delivery, from product design and high-performance engineering to DevOps and AI operations. Headquartered in Singapore, our global team and clients operate R&D hubs across Southeast Asia. We are a team of entrepreneurs, engineers, and product builders dedicated to solving complex technical challenges and turning bold ideas into impactful technology.

About the Role

We are looking for an experienced Senior Backend Engineer to join our small, high-performing engineering team. This role is ideal for someone who takes strong ownership, enjoys solving complex backend and infrastructure challenges, and thrives working independently with minimal supervision.

As part of a lean team, we're looking for someone who is not only technically strong but also collaborative, humble, and genuinely enjoyable to work with.

Responsibilities

• Design, develop, and maintain scalable backend services using Java or Kotlin.
• Build and optimize high-performance, production-grade applications using Quarkus.
• Design and optimize PostgreSQL and Redis deployments for performance, reliability, and scalability.
• Configure and maintain Kubernetes workloads, deployment strategies, and application manifests.
• Configure, secure, and manage Linux-based cloud virtual machines supporting stateful services.
• Design, improve, and maintain CI/CD pipelines that enable automated, reliable, and secure deployments.
• Work closely with the CTO to translate product requirements into technical solutions while taking ownership of backend architecture and implementation.
• Drive technical improvements, automation initiatives, and operational excellence across the platform.

Technical Requirements

• 7+ years of professional backend software development experience.
• Strong expertise building production-grade applications using Java or Kotlin.
• Hands-on production experience with Quarkus, or extensive Spring Boot experience with the ability to quickly master Quarkus, including its compile-time optimizations and reactive programming model.
• Deep expertise with PostgreSQL, including: Query optimization; Indexing strategies; Connection pooling; High-throughput relational database performance
• Strong experience with Redis, including: Caching strategies; Data structures; Eviction policies
• Hands-on experience configuring and maintaining Kubernetes deployments, manifests, and containerized workloads.
• Experience configuring, securing, and managing Linux cloud virtual machines for stateful services such as PostgreSQL and Redis.
• Strong knowledge of CI/CD pipelines and automation-driven deployments, with experience building systems that safely deploy applications and infrastructure without direct production server access.

Soft Skills

• Excellent English communication skills (written and spoken).
• High level of ownership and accountability.
• Able to work independently with minimal supervision.
• Comfortable working directly with a CTO in a small engineering team.
• Collaborative, proactive, and genuinely pleasant to work with.

Working Arrangement

• Able to align working hours as much as possible with the Luxembourg timezone (later start and finish).
• Comfortable working remotely in a highly autonomous environment.

What do we offer?

• Projects/Clients: Work on interesting global projects and high-impact challenges for top brands and governments using a mature SCRUM framework.
• Team & Environment: Join a diverse community across Indonesia, Cambodia, Singapore, Thailand, and Europe in an optimized remote environment.
• Culture: Experience a trust-centric, flexible, and collaborative culture where everyone is ready to lend a helping hand.
• Learning & Growth: Access mentoring programs, Growth Accountability Groups, and annual training credits to keep you at the forefront of tech trends.
• Cutting-Edge Tech: Engage with a wide range of technologies including AI, blockchain, Cloud services, and microservices.