At a Glance
- Tasks: Design and build secure backend services and APIs for innovative projects.
- Company: Join a pioneering tech firm focused on cutting-edge cybersecurity solutions.
- Benefits: Attractive salary, flexible working options, and opportunities for professional growth.
- Other info: Collaborative startup environment with a chance to make a real impact.
- Why this job: Be at the forefront of technology, shaping the future of cybersecurity.
- Qualifications: 8+ years in software engineering with expertise in Python and PostgreSQL.
The predicted salary is between 60000 - 80000 £ per year.
London Arena, United Kingdom | Posted on 07/08/2026
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 Postgre SQL-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 Postgre SQL 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, authorisation 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.
- Required experience
- 8+ years of professional software engineering experience, including ownership of production backend systems.
- Expert-level Python engineering experience. Fast API, Pydantic, asyncio, SQLAlchemy or equivalent frameworks are highly relevant.
- Strong Postgre SQL 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.
- 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.
- #J-18808-Ljbffr
Contact Details:
J&T Business Consulting Recruitment Team
StudySmarter Expert Advice🤫
We think this is how you could land Principle Platform Engineer - Backend Production Expert in London
✨Join Local Tech Meetups
Get out there and mingle with fellow developers by joining local tech meetups. It’s a fantastic way to meet people who might be working at J&T Business Consulting or know someone who does. Plus, you can pick up some trendy tech skills and trends while you're at it!
✨Contribute to Open Source Projects
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✨Tap into Online Developer Communities
Don’t underestimate the power of online developer communities like GitHub, Stack Overflow, and even Reddit. Participate in discussions, share your projects, and build your visibility. We can often find opportunities through these channels that can lead to a full-time gig at companies like J&T Business Consulting.
✨Explore Job Boards Specifically for Tech Roles
Keep your eyes peeled on job boards that focus on tech roles. Sites like TechCareers or Stack Overflow Jobs can often have listings for companies like J&T Business Consulting that might not show up on broader job sites. Make it a habit to check these regularly, and don’t hesitate to apply directly through our website!
We think you need these skills to ace Principle Platform Engineer - Backend Production Expert in London
Some tips for your application 🫡
Show off your coding skills:When applying for a software engineering role, it's super important to showcase your coding skills. Make sure your CV includes your tech stack, any relevant programming languages you’re comfortable with, and examples of projects you've worked on. If you have a GitHub profile, link it up! We love to see code in action.
Tailor your portfolio:For a full-time role, we’d expect to see some solid examples of your work in your portfolio. Make sure to include at least two or three projects that highlight your problem-solving skills and your ability to work with different technologies. Focus on the projects that are most relevant to the position at J&T Business Consulting.
Craft a killer cover letter:Your cover letter is your chance to stand out—make it personal! Explain why you want to work at J&T Business Consulting and how your skills align with the role. Show us your passion for software development. We dig enthusiastic candidates who understand the value of collaboration and continuous learning!
Be clear and concise:When it comes to writing your CV and cover letter, clarity is key. Avoid jargon that could confuse us and stick to simple, direct language. Highlight your achievements with quantifiable results where possible, and keep everything easy to read. A well-organised application goes a long way!
How to prepare for a job interview at J&T Business Consulting
✨Brush Up on Your Coding Skills
For a full-time software engineering role, it's crucial that we stay sharp with our coding abilities. Expect technical questions that might involve solving problems on the spot or discussing algorithms. Practise on platforms like LeetCode or HackerRank to get comfortable with the types of questions that often come up.
✨Know Your Tools and Frameworks
Make sure we’re well-acquainted with the tools and technologies listed in the job description. Familiarise ourselves with any specific frameworks or programming languages mentioned. If J&T Business Consulting uses React or Node.js, for instance, be ready to discuss how we’ve used them in previous projects or coursework.
✨Showcase Your Projects
Bring along a portfolio that highlights our best work. This could be code samples, GitHub repositories, or any side projects we’ve built. Make sure we can talk through our thought process for each project, especially the challenges we faced and how we solved them—this shows our problem-solving skills in action.
✨Prepare for Behavioural Questions
While technical skills are key, full-time positions also require cultural fit. Be ready to discuss our previous experiences and how we handle teamwork, conflict, and deadlines. Brush up on the STAR method—Situation, Task, Action, Result—to clearly articulate our past experiences when discussing how we've contributed to a team.
