J&T Business Consulting
Principle Platform Engineer - Backend Production Expert
London
Posted 2 days ago
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What this person will build:
A single-node on-prem control plane deployable into a customer environment.
- Backend services for zones, assets, phantoms, alerts, response state, contracts, audit events, and evidence generation.
- APIs used by the portal, watchdog, connector layer, and detection engine.
- A PostgreSQL-backed data model that can evolve towards the full Merkle Ledger, Trust Contract, and Audit architecture.
- A secure event pipeline from watchdog/connector signals through alert generation and response workflows.
- The first hash-chained audit log and evidence export primitives needed for enterprise review.
Core responsibilities
- Translate the Praesidius engineering specification into a pragmatic POC architecture and implementation plan.
- Design and build backend services, APIs, and internal module boundaries for the on-prem control plane.
- Own the PostgreSQL schema for assets, zones, phantoms, alerts, response state, policies, audit records, and early trust-contract objects.
- Build robust ingestion and processing paths for watchdog events, phantom interactions, connector data, and response actions.
- Implement authentication, authorization, and RBAC foundations in collaboration with the CTO and frontend engineer.
- Implement the first audit-chain primitives: structured audit entries, predecessor hashing, chain head signing hooks, and evidence export APIs.
- Create engineering standards for code quality, testing, error handling, logging, security review, and documentation.
- Work with the infrastructure engineer to package the control plane as an on-prem Docker Compose deployment with a clear path to Kubernetes later.
- Work with the detection engineer to ensure alert and response workflows are deterministic, recoverable, and explainable.
- Support investor, design partner, and Catapult/Innovate UK technical conversations where backend architecture or implementation credibility is relevant.
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Required experience:
- 8+ years of professional software engineering experience, including ownership of production backend systems.
- Expert-level Python engineering experience. FastAPI, Pydantic, asyncio, SQLAlchemy, or equivalent frameworks are highly relevant.
- Strong PostgreSQL experience, including schema design, migrations, indexing, transactional semantics, and operational performance.
- Experience designing secure APIs and backend systems that need to be reliable, observable, and auditable.
- Experience with Docker-based deployments and practical Linux systems engineering.
- Strong understanding of distributed-system trade-offs, even though the first POC is intentionally single-node.
- Ability to write clear technical documentation, decision records, and implementation plans.
- Comfortable working in a small founding team where architecture, code, debugging, customer context, and hiring input all overlap.
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Desirable experience:
- Cybersecurity product experience in EDR, XDR, SIEM, SOAR, Zero Trust, identity security, network security, or deception technology.
- Experience implementing cryptographic data structures, signed records, PKI integrations, or tamper-evident audit systems.
- Experience with Microsoft security ecosystems such as Defender for Endpoint, Microsoft Graph, Entra ID, or Sentinel.
- Experience building on-prem enterprise software, appliances, or products that run inside customer-controlled environments.
- Previous founding engineer or technical lead experience in an early-stage company.
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Skills
Python
FastAPI
Pydantic
Asyncio
SQLAlchemy
PostgreSQL
Docker
Linux
APIs
Cybersecurity
Cryptography
Audit Systems
Enterprise Software
Distributed Systems
RBAC
Documentation
Location