Senior ServiceNow Developer · United Kingdom

Andrew Parkes

I design and build systems at the intersection of platform engineering, enterprise integration, and automation. Eight years deep on ServiceNow — from sole instance owner to senior delivery lead at Capgemini. Separately, I run live algorithmic trading systems on XAUUSD.

ServiceNow Work → EA & Trading → Read the Blog
[email protected] — profile
➜ cat stack.json
{
  "role": "Senior Developer",
  "company": "Capgemini",
  "platform": "ServiceNow",
  "certs": ["CSA","ITIL","PRINCE2"],
  "specialisms": [
    "API Architecture",
    "Integration Design",
    "Scoped Apps"
  ],
  "ea": "GoldBreak · XAUUSD M1",
  "available": true
}
0
Years in Tech
0
Years on ServiceNow
0
EA Win Rate
CSA
ServiceNow Certified
Currently working on
ServiceNow
GoldBreak v11.8
Five bug fixes scheduled for April 2026 — Asia expiry, NY self-cancel, Friday cutoff, VPS migration
Game Dev
Château · UE5
First-person winemaking simulation set in the Loire Valley. Basic playable map in progress with Fab.com assets
Writing
ServiceNow Blog
Documenting undiscovered platform edge cases — starting with the GlideRecord async context trap
// 01

About

I'm a senior ServiceNow engineer and integration architect with eight years of platform experience — from running an instance solo as the sole developer at an 800-person international law firm, through to leading complex multi-client delivery at Capgemini's ServiceNow practice.

My depth is in API design and integration engineering. I've built dynamic API generation frameworks where configuration records define endpoints at runtime, layered composite authentication systems combining Bearer + mTLS + signed headers, and ACL-driven payload filtering architectures that enforce data segregation without forking endpoint logic.

Outside the platform, I design and operate algorithmic trading systems in MQL5. GoldBreak runs live on XAUUSD via IC Markets. The same discipline that makes good software makes good trading: data-driven decisions, version governance, and no guesswork.

ServiceNow Platform
Scripted REST APIsScoped Apps Service PortalFlow Designer AngularJS WidgetsITSM · CSM · CMDB Business RulesACL Design
Integration & Auth
REST · SOAPOpenAPI/Swagger OAuth 2.0 · JWTmTLSMID Server
Process & Compliance
Agile · ScrumITIL ISO 27001GDPRPRINCE2
Algorithmic Trading
MQL5MetaTrader 5 XAUUSDBacktesting
// 02

Experience

Oct 2023 – Present
Capgemini
Senior ServiceNow Developer
ServiceNow Practice · Public & Private Sector
▸Architected a dynamic API generation framework — configuration records define endpoints, auth requirements, and payload rules at runtime, eliminating developer involvement from routine API onboarding.
▸Engineered multi-step transactional APIs with staging, transformation, orchestration, and rollback across live integrations with CRM platforms, middleware, and financial systems.
▸Designed composite auth flows: Bearer + mTLS + HMAC-signed headers, custom JWT validation, and tenant-aware credential resolution for high-security enterprise consumers.
▸Delivered ACL-driven payload filtering at the API layer — response fields stripped dynamically by calling principal, enforcing data segregation without forking logic.
▸Led backlog grooming and peer review for junior developers; contributed to pre-sales solutioning and client demonstrations.
Oct 2019 – Oct 2022
Fieldfisher
ServiceNow Developer & Administrator
Sole platform owner · 800-person international law firm
▸Owned the full instance lifecycle: security architecture, ACL design, upgrades, cloning, integrations, and custom application development — without a team.
▸Built scoped applications, workflows, business rules, client scripts, and integrations from requirements through production sign-off.
▸Authored an upgrade regression protocol across multiple major releases — still in active use after departure.
Dec 2017 – Oct 2019
Fieldfisher
IT Service Desk Technician
▸Front-line hardware, software, and infrastructure support; identity management; major incident coordination.
2015 – 2017
1Insurer Ltd
Junior Developer & PMO Analyst
▸HTML/XML defect resolution and template development; Agile/Waterfall planning and vendor management in the PMO function.
// 03

Dedicated Work

// Platform Engineering
ServiceNow
Architecture
8+
Yrs on Platform
CSA
Certified
∞
APIs Built
Deep dives into undocumented ServiceNow — dynamic API generation, composite authentication, GlideRecord edge cases, ACL payload filtering, and upgrade governance. Written from production experience.
Scripted RESTScoped AppsAuth DesignFlow DesignerITSM · CSM
View full page →
// Algorithmic Trading
GoldBreak EA
& MQL5
87%
Win Rate
7.6%
Max Drawdown
Live
IC Markets
Architecture and version history of GoldBreak — a session-aware Donchian channel breakout EA running live on XAUUSD M1. Backtesting methodology, pyramid scaling, and MQL5 patterns.
MQL5MetaTrader 5XAUUSDDonchianIC Markets
View full page →
// 04

Contact

Let's build something solid.

Complex ServiceNow integrations, platform architecture, scoped application development. Open to senior consulting engagements and contract roles.

✉[email protected] inlinkedin.com/in/andrew-parkes2
Certifications
SN
ServiceNow Certified System Administrator (CSA)
IT
ITIL Foundation · AXELOS
P2
PRINCE2 Practitioner · AXELOS
AG
Agile & Scrum (Certified)