01
TRCI-26-05293
Senior iOS Native Developer (Security/Pen Testing, Go/LangChain) - Contract
Contract role for a senior iOS native engineer to build and secure iOS applications. The position requires strong Swift/Objective-C iOS development, hands-on penetration testing of iOS apps (including common mobile vulnerabilities and iOS security controls), and experience with either Golang services or the LangChain framework (LLM app framework) to support backend/AI integration. Locations listed are Bristol, Leeds, London, or Manchester.
Position summary
- Location
- United Kingdom
- Workplace
- Hybrid
- Employment
- Contract
- Experience
- Minimum 10 years and Maximum 12 years
Role overview
Why This Role Matters.
Contract role for a senior iOS native engineer to build and secure iOS applications. The position requires strong Swift/Objective-C iOS development, hands-on penetration testing of iOS apps (including common mobile vulnerabilities and iOS security controls), and experience with either Golang services or the LangChain framework (LLM app framework) to support backend/AI integration. Locations listed are Bristol, Leeds, London, or Manchester.
Your Impact
Deliver Enterprise Value
Help organisations solve complex business problems through modern technology, consulting expertise and measurable outcomes.
Collaboration
Work Across Teams
Collaborate with consultants, architects, engineers and client stakeholders throughout the project lifecycle.
Growth
Learn Continuously
Gain exposure to enterprise technologies, certifications, mentoring and real-world project experience.
Career Path
Grow With Ubique
Build a long-term consulting career with opportunities to take on greater responsibility and leadership over time.
Responsibilities
What You'll Be Doing.
Every role at Ubique contributes directly to solving meaningful business challenges for our clients.
Technology stack
Tools & Technologies.
The platforms and technologies you'll use to build modern, enterprise-grade solutions.
01
iOS
Required
02
Swift
Required
03
Objective-C
Required
04
Xcode
Required
05
Golang
Required
06
Go
Required
07
LangChain
Required
08
LLM
Required
09
Mobile App Security
Required
10
iOS Penetration Testing
Required
11
OWASP MASVS
Required
12
OWASP Mobile Top 10
Required
13
Keychain
Required
14
App Transport Security
Required
15
ATS
Required
16
Code Signing
Required
17
Entitlements
Required
18
Sandbox
Required
19
Frida
Required
20
Objection
Required
Requirements
Skills & Experience.
We value curiosity, collaboration and continuous learning. If you don't meet every requirement but believe you can make an impact, we'd still love to hear from you.
Essential
Required Qualifications
iOS native development (Swift and/or Objective-C)
iOS app penetration testing / mobile application security testing
Understanding of iOS security model (Keychain, entitlements, sandboxing, code signing)
Golang OR LangChain framework experience
Preferred
Nice to Have
OWASP Mobile Top 10 knowledge
Experience with iOS reverse engineering tools (e.g., Frida, Objection, Hopper/IDA)
Secure coding practices for mobile apps (crypto, storage, networking)
CI/CD for iOS (e.g., Fastlane)
What you'll gain
More Than Just A Job.
We're committed to helping every team member grow professionally, personally and technically while working on meaningful projects.
Global Exposure
Collaborate with international clients and multicultural teams on enterprise programmes.
Continuous Learning
Expand your expertise through mentoring, certifications and hands-on project experience.
Career Growth
Take ownership, develop leadership skills and grow your consulting career over time.
Flexible Working
Hybrid and remote collaboration designed around trust and delivering exceptional outcomes.
People First
Join a supportive culture where collaboration, respect and long-term relationships come first.
Enterprise Projects
Work on meaningful technology initiatives for leading organisations across industries.
Apply
Apply for Senior iOS Native Developer (Security/Pen Testing, Go/LangChain) - Contract
One page, about two minutes. We only ask for what we actually need to have a first conversation.