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About the Role

Valarian Technologies is building critical tools to safeguard the future in an era of evolving global security challenges. We are rethinking security beyond traditional military domains, addressing asymmetric threats that impact our technological advantage, economic strength, and democratic institutions. We build Acra, the platform foundation for everything we do as a dual-use technology company. The platform's name, rooted in the Greek word for citadel (or, fortress), reflects the design and purpose of our infrastructure-agnostic secure enclaves: protecting critical data.

Responsibilities

Design, build, and operate backend and platform services for ACRA, a complex security-focused Kubernetes platform.
Work primarily in Go, building microservices, APIs, internal platform services, and event-driven systems.
Own services end to end: from system design and implementation through to containerisation, deployment, monitoring, debugging, and production operations.
Help shape the infrastructure and delivery foundations around the platform, including Docker, Kubernetes, CI/CD pipelines, GitOps workflows, container registries, secrets management, deployment automation, and Argo-based delivery flows.
Contribute to core platform primitives such as identity-aware service communication, lifecycle orchestration, policy-driven deployment, auditability, observability, and controlled application execution.
Reason clearly about trust boundaries, failure domains, and operational responsibility.
Understand the product vision, challenge assumptions, propose better designs, and help translate ambiguous requirements into robust technical systems.
Help maintain, evolve, and scale the systems owned over time.
Help raise the bar for how the team designs, reviews, deploys, operates, and learns.
Build and own backend services, APIs, microservices, and platform components in Go.
Own services from system design through implementation, deployment, observability, and production operations.
Design event-driven, scalable, observable, and resilient systems.
Build and improve Docker images, Kubernetes workloads, CI/CD pipelines, and Argo/GitOps workflows.
Work with container registries, secrets, secure configuration, and deployment automation.
Contribute to platform architecture, system design, security boundaries, and operational models.
Help build platform capabilities such as workload isolation, policy enforcement, auditability, and identity-aware communication.
Work closely with product, leadership, and engineering to turn ambiguous requirements into reliable technical solutions.
Make pragmatic technical trade-offs and explain them clearly.
Improve monitoring, logging, tracing, alerting, and production debugging.
Raise engineering standards through design reviews, code reviews, documentation, and operational improvements.
Operate independently in a startup environment with strong ownership and product thinking.

Requirements

Senior backend engineering experience, ideally with hands-on Go experience.
Experience owning production services, not just building features.
Experience building APIs, backend services, microservices, or distributed systems.
Strong experience with Docker, Kubernetes, and CI/CD.
Familiarity with GitOps, Argo, container registries, secrets, and secure deployment workflows.
Strong system design fundamentals, especially around reliability, scalability, observability, and failure handling.
Ability to reason about security boundaries, operational risk, and production failure modes.
Experience debugging issues across applications, services, and infrastructure.
Comfort working from ambiguous requirements and shaping the technical approach.
Product-minded engineering judgement.
A self-driven, ownership-oriented way of working.
Comfortable giving and receiving feedback, reviewing designs, and helping improve team standards.
Willingness to work across backend, platform, infrastructure, and DevOps areas.
Strong engineering judgement, curiosity, and determination to build excellent systems.
Experience in secure or regulated environments (e.g., defence, government, fintech, healthcare, critical infrastructure, or sovereign cloud) is a plus.
Experience with zero-trust architecture, identity-aware systems, policy enforcement, or workload isolation is a plus.
Experience with service mesh, network policy, ingress/egress control, or secure service-to-service communication is a plus.
Experience with observability tooling, including metrics, logs, traces, alerting, and incident response is a plus.
Familiarity with supply-chain security concepts (e.g., image signing, vulnerability scanning, SBOMs, artifact verification, admission control) is a plus.
Experience with secrets management tools (e.g., Vault, SOPS, Sealed Secrets, External Secrets, cloud-native secret managers) is a plus.
Experience with systems where auditability, traceability, and operational evidence are first-class requirements is a plus.
Experience in startup, platform, infrastructure, or product engineering environments with broad ownership is a plus.

Skills

Go
Docker
Kubernetes
CI/CD
GitOps
Argo
Microservices
APIs
Event-driven systems
Container registries
Secrets management
Deployment automation
System design
Reliability
Scalability
Observability
Failure handling
Security boundaries
Operational risk
Production failure modes
Debugging
Product thinking
Zero-trust architecture
Identity-aware systems
Policy enforcement
Workload isolation
Service mesh
Network policy
Ingress/egress control
Secure service-to-service communication
Metrics
Logs
Traces
Alerting
Incident response
Supply-chain security
Image signing
Vulnerability scanning
SBOMs
Artifact verification
Admission control
Vault
SOPS
Sealed Secrets
External Secrets
Cloud-native secret managers
Auditability
Traceability
Operational evidence

Location

London HQ

Work Type

Hybrid

Experience Level

Senior

Salary/Compensations

A competitive salary

Benefits

Equity
Employer pension contributions
Private health insurance
Rewarding company retreats and meetups

About the Company

Valarian Technologies is a dual-use technology company building critical tools to safeguard the future in an era of evolving global security challenges.
We're rethinking security beyond traditional military domains, addressing asymmetric threats that impact our technological advantage, economic strength, and democratic institutions.
We build Acra – the platform foundation for everything we do as a dual-use technology company.
The platform’s name, rooted in the Greek word for citadel (or, fortress), reflects the design and purpose of our infrastructure-agnostic secure enclaves: protecting critical data.
Some of the government and commercial workflows include: increased operational resiliency for mission-critical systems and functions; enabling organisations to more quickly and widely adopt emerging technologies while ensuring the integrity of their intellectual property; information flow during disaster response scenarios, and zero-trust / least-privilege environments for M&A, attorney-client privileged communications, etc.
At our core, we're driven by a shared mission and a belief in making a tangible impact on our world.
Whether you join our London HQ or the wider global organisation, you’ll be a part of collaborative, high-performing teams, creating cutting-edge software, platforms, and infrastructure.
Our culture is built on inclusivity, compassion and flexibility – we want everyone to be empowered to achieve their goals at Valarian.
The work we do is vital, but so are the connections that make it happen.
We thrive on the shared energy, spontaneous conversations, and mutual trust built when we spend time together.
We operate on a hybrid model, gathering in our London office 3 days a week to support one another and collaborate.

Equal Opportunity

We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.