Sr. Platform Engineer
At a glance
Senior Platform & Infrastructure role at OneDome. Remote, Ukraine · full-time.
Pay not stated Platform Engineer salary
devopsroles summary, based on the employer's posting.
What you'll do
- Run the organisation’s five AWS accounts and replace manual infrastructure changes with Terraform
- Build usable CI/CD pipelines, support safer release patterns, and reduce reliance on individual deploy knowledge
- Create monitoring, alerts, incident response, and user-journey SLIs and SLOs; lead reviews after incidents
- Prepare infrastructure for launch traffic with autoscaling, capacity plans, runbooks, and multi-region disaster recovery
- Harden and tune AWS services, work with backend engineers on production issues, and guide platform standards
What you bring
- At least six years managing AWS in production, including the core services and EKS named in the role
- Production Terraform experience and hands-on Kubernetes and Docker experience
- Strong delivery pipeline and infrastructure security skills, including GitOps, access controls, secrets, patching, and vulnerability checks
- You can build observability and have backend experience in Java, Python, or Node, with B2/C1 English
Who this fits
This suits a self-directed senior infrastructure engineer who can build platform capability without an established platform team and mentor engineers as it grows. The role is fully remote across the EU, aligned to UK working hours, with a sustainable on-call rotation.
From the employer
About Onedome
We're a UK fintech building high-throughput digital infrastructure for the mortgage and property space. Recently acquired Trussle. We're taking our platform to the next level: fully automated, self-healing, observable, and built to handle real traffic spikes (we have a TV launch coming up).
The role
You'll be our senior platform engineer. Not a traditional ops role. You'll treat infrastructure as a product, build the internal developer platform our engineers deploy through, and bring SRE discipline into the application tier when it's needed.
You won't have a platform team to lean on. You'll be building that capability. We know exactly what we need.
What you'll do
- Own 5 AWS accounts across the organisation (QA, Prod, Infra, plus two others)
- Architect and maintain infrastructure as code with Terraform. Replace the click-ops that's still around
- Stand up CI/CD pipelines engineers actually want to use. Blue/green and canary where it makes sense
- Run releases reliably and reduce key-person risk on the deploy process
- Set up monitoring, alerting, and incident response so we catch issues before customers do. Define SLIs and SLOs that map to real user journeys
- Lead incident response as the primary infra responder. Run blameless post-mortems
- Patch and harden the platform. We're a fintech, this matters. IAM least privilege, secrets management, vulnerability scanning, MFA enforcement
- Lead infrastructure work for the TV launch: traffic spikes, autoscaling, capacity planning, runbooks
- Partner with backend engineers when production issues cross into the app tier. JVM tuning, connection pools, async patterns, memory leaks
- Architect multi-region DR. Drive the platform toward self-healing
- Optimise cost across DynamoDB, Lambda, and the wider AWS footprint
- Set architectural guardrails with tech leads and SWEs. Mentor engineers as the platform capability grows
You must have
- 6+ years hands-on AWS in production (VPC, IAM, EC2/ECS/EKS, Lambda, S3, CloudFront, Route53, RDS, DynamoDB, SQS)
- Production Terraform (Terragrunt a plus). Multi-environment state management
- Production Kubernetes and Docker. EKS specifically
- Strong CI/CD experience: GitHub Actions, GitLab, Jenkins, or ArgoCD. GitOps practices
- Strong infrastructure security: IAM least privilege, secrets, patching, vulnerability scanning, MFA enforcement
- Observability from scratch: CloudWatch, Datadog, Grafana, Prometheus, OpenTelemetry, or ELK
- Solid backend competency in Java (Spring Boot), Python, or Node. Understanding of JVM, concurrency, async systems
- Comfort being the senior infrastructure person. Self-directed, opinionated, disciplined about documentation
- B2/C1 Level English
Nice to have
- Fintech or other regulated industry experience
- DynamoDB at scale (we run many tables with PITR and S3 exports, Lambda-driven daily incrementals)
- AWS cost optimisation track record
- Past experience as a first infrastructure hire at a small team
- Building internal developer platforms or self-service tooling
- AWS DevOps Pro, Solutions Architect Pro, or CKA
- Service mesh experience (Istio, Linkerd) and DevSecOps practices
- Firebase or GCP exposure (we have a small footprint there)
What you won't get from us
- A platform team to lean on. You'll be building that capability
- Click-ops everywhere. You'll be replacing what exists with IaC
- Ambiguity about the work. We know exactly what we need
Working setup
- UK working hours.
- Fully remote across the EU
- Tooling: Microsoft 365, Teams, Planner, Nuclino, GitHub
- aws-vault with MFA enforcement on all accounts
- Sustainable on-call rotation
Platform & Infrastructure work from LinkedIn, X, Reddit and Upwork, in one list.
Each morning you get everything that fits, strongest first.
Platform & InfrastructureRemote
Find me workBy the team behind devopsroles.