Back End Engineer

Back End Engineer

Location: EU-Based, fully remote | Type: Contract B2B

We're looking for a Back-End Engineer to design, build, and operate the services that power Elisity's microsegmentation platform. You'll work across our core backend - Java services, Kafka-based event streaming, and PostgreSQL data stores - building reliable, scalable systems that turn device intelligence and flow data into real-time policy decisions. This is a hands-on engineering role focused on system design, data correctness, and production reliability.

What you'll do

• Design and build backend services in Java that ingest, process, and serve device-identity and network-flow data at scale.
• Own event-driven pipelines on Kafka - model topics, partitioning, ordering, and delivery guarantees so data flows reliably between services.
• Design and evolve PostgreSQL schemas for high-throughput, query-heavy workloads, and tune for performance, correctness, and safe migrations.
• Build and maintain APIs that other services and the product surface consume, with clear contracts and versioning.
• Make services production-ready: instrumentation, metrics, alerting, and the SLOs you'll stand behind.
• Diagnose and resolve performance, scaling, and reliability issues across the data plane.
• Partner with architects, product owners, and other engineers to turn feature intent into well-scoped, buildable work.
• Contribute to code review, technical design discussions, and engineering standards.

What We're Looking For

• Strong backend engineering experience building production services in Java.
• Hands-on experience with Kafka (or comparable streaming/messaging systems) - you understand topics, partitions, consumer groups, and delivery semantics.
• Solid PostgreSQL skills - schema design, indexing, query optimization, and safe migrations under load.
• A track record of building scalable, reliable distributed systems and reasoning about failure modes.
• Comfort owning services end to end, including observability and on-call-grade reliability.
• Clear communication and the ability to collaborate across a remote engineering team.

Nice to Have

• Experience in network security, device identity, or microsegmentation - or an adjacent security/networking domain.
• Experience with cloud-delivered, multi-tenant SaaS platforms.
• Familiarity with analytics or data-plane workloads, and large-scale data processing.

Why You'll Love Working Here

• 100% remote with flexibility and trust.
• High-impact role in a fast-growing scaleup environment.
• Modern, cutting-edge tech stack with real room to experiment.
• Strong ownership and influence over backend and system-design decisions.
• Supportive, collaborative team that values learning and initiative.

Apply Now

About Elisity

Elisity (www.elisity.com) is an identity-based microsegmentation company that helps enterprises stop lateral movement and contain breaches across IT, OT, and IoT environments. The Elisity platform discovers every device on an organization's network, enforces least-privilege access policies through existing network infrastructure, and delivers full microsegmentation in weeks - without agents, additional hardware, or network re-architecture. Elisity is trusted by Fortune 500 healthcare systems, global manufacturers, and pharmaceutical companies including GSK, Main Line Health, Shaw Floors, and St. Luke's University Health Network. Founded in 2019, Elisity has a global employee footprint and a growing number of customers in the Fortune 500, and has achieved many awards, including Gartner Cool Vendor (2025), SINIT16 Innovator (2025), and Forrester Strong Performer (2024).