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Contract Mobile Engineer Jobs

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Find top CONTRACT Mobile Engineer jobs faster with Haystack. Explore exclusive freelance and contract opportunities for skilled mobile developers specializing in iOS and Android. Start your next project today with flexible mobile engineering roles tailored for contractors.

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Contract Software Engineer

Langham Recruitment

£400/day - £500/day

RECENTLY POSTED

Contract Software Engineer Up to 500 per day Outside IR35 London/Hybrid or Remote 3 Month RollingAbout the Role:We are seeking a Mid to Senior Software Engineer to join a fast-paced, dynamic project. This role offers hands-on involvement across the full development lifecycle, from requirements gathering to production release, within a collaborative, scale-up style environment.Key Responsibilities:

Take ownership of deliverables and proactively solve technical challenges.

Collaborate closely with cross-functional teams.

Contribute to the full software development lifecycle, including requirement definition, coding, testing, and release.

Technical Requirements:

Next.js: Proven experience building scalable, performant web applications with server-side rendering and API integrations.

React Native: Ability to develop and maintain mobile apps across iOS and Android platforms.

Web3 (Preferred): Familiarity with blockchain, smart contracts, and decentralised applications is a plus.

Strong proficiency in modern JavaScript/TypeScript, component-based architecture, and responsive design.

Experience in CI/CD pipelines, testing practices, and rapid iteration workflows.

Candidate Profile:

Comfortable in fast-moving, scale-up style environments.

Demonstrates strong ownership, accountability, and problem-solving skills.

Excellent communication and collaboration skills for cross-functional teamwork.

400- 500 per day

London/Hybrid or Fully Remote

3 month rolling contract

£300/day - £350/day

RECENTLY POSTED

Focus: Banking Applications / Swift / AgileSalary: Up to 70,000 + 20% Bonus + 20% PensionLocation: Central London - 1 day per week onsiteJoin a prestigious financial services organisation renowned for its commitment to excellence and customer-centric approach. As a leader in the industry, they are expanding their development team to enhance digital capabilities and deliver exceptional service to their clients.As an iOS Developer, you’ll play a key role in the iOS team, contributing to the development of new features, enhancements, and the day-to-day operations of their iOS applications. You’ll be part of a small, cross-functional, collaborative, and supportive team working in a fast-paced Agile environment. Strong communication skills are essential, as you’ll work closely with surrounding teams such as UAT and Integration.Experience Required:

Proficient in iOS development

Strong knowledge of Swift

Experience with UIKit

Comfortable working in an Agile environment

Desirable (but not essential):

Experience with React

Familiarity with Rx

Background in Financial Services / Banking

If you’re interested, please apply with an up-to-date CV and we’ll be in touch to provide more information.

Senior iOS Software Engineer Inside IR35 £375pd

InterAct Consulting

£350/day - £375/day

RECENTLY POSTED

Contract Role: Senior iOS Software Engineer Rate: Up to £375/day (Inside IR35) Location: Remote with onsite work in Salford (1-2 days per week) Duration: ASAP - 31 March 2026 Laptop Required: YesJoin a forward-thinking mobile engineering team shaping the playback experience for millions of users. As a Senior iOS Software Engineer, you’ll take ownership of key media player components and drive the evolution of our architecture using Swift Package Manager.What You’ll Do:

Lead the migration from CocoaPods to Swift Package Manager

Design, build, and maintain internal Swift libraries for shared use across teams

Champion clean code and reliability through Test Driven Development and pair programming

Coach and mentor other engineers on modern iOS practices and tooling

What You’ll Bring:

Advanced iOS development experience with Swift and Objective-C

Proven delivery using Swift Package Manager (SPM)

Hands-on experience migrating large-scale apps from CocoaPods to SPM

Strong focus on TDD, maintainable design, and scalable architecture

If you love solving complex technical challenges and want to make a lasting impact on a core media platform, this role has your name on it.

Tria Recruitment

£300/day - £350/day

RECENTLY POSTED

Focus: Banking Applications/Swift/AgileSalary: Up to £70,000 + 20% Bonus + 20% PensionLocation: Central London - 1 day per week onsiteJoin a prestigious financial services organisation renowned for its commitment to excellence and customer-centric approach. As a leader in the industry, they are expanding their development team to enhance digital capabilities and deliver exceptional service to their clients.As an iOS Developer, you’ll play a key role in the iOS team, contributing to the development of new features, enhancements, and the day-to-day operations of their iOS applications. You’ll be part of a small, cross-functional, collaborative, and supportive team working in a fast-paced Agile environment. Strong communication skills are essential, as you’ll work closely with surrounding teams such as UAT and Integration.Experience Required:

Proficient in iOS development

Strong knowledge of Swift

Experience with UIKit

Comfortable working in an Agile environment

Desirable (but not essential):

Experience with React

Familiarity with Rx

Background in Financial Services/Banking

If you’re interested, please apply with an up-to-date CV and we’ll be in touch to provide more information.

IOS Developer - 12 Month Contract

Square One Resources

£350/day - £360/day

RECENTLY POSTED

Job Title: iOS Developer Location: Northampton - 2 days per week Salary/Rate: Up to £360 per day inside IR35 Start Date: 24/11/2025 Job Type: Contract - 12 MonthsCompany Introduction We have an exciting opportunity now available with one of our sector-leading financial services clients! They are currently looking for a skilled iOS Developer to join their team for a twelve-month contract.Job Responsibilities/ObjectivesYou’ll contribute to the design, development and maintenance of our iOS applications, delivering a smooth, secure and engaging experience to millions of users. This is an exciting opportunity to bring your expertise in iOS development to a dynamic, collaborative team working on high-impact financial products.To be successful as a Senior iOS Frontend Engineer, you should have experience with: . Proven experience in customer experience (CX) design, building the user interface (UI) and user experience (UX) for iOS applications. . Solid experience with Swift, Mobile architecture patters and Test-Driven Development. . Deep understanding of iOS frameworks, tools, and development best practices. . Strong background in automated mobile testing and building financial applications. . Experience in Back End services and Front End/Back End integration.Some other highly valued skills may include: . Experience in product development within agile teams. . Familiarity with Agile methodologies. . Demonstrated success in cross-functional team collaboration.If you are interested in this opportunity, please apply now with your updated CV in Microsoft Word/PDF format.Disclaimer Notwithstanding any guidelines given to level of experience sought, we will consider candidates from outside this range if they can demonstrate the necessary competencies. Square One is acting as both an employment agency and an employment business, and is an equal opportunities recruitment business. Square One embraces diversity and will treat everyone equally. Please see our website for our full diversity statement.

Mobile Application Security Specialist

Infoplus Technologies UK Ltd

RECENTLY POSTED

TECH-AGNOSTIC ROLE

Job Description:Mandatory Skills: Mobile SecurityExperience: 5-8 YearsLOCATION**:** Leeds/Halifax/Manchester/Bristol/Edinburgh, UK

Experience of Mobile platform security, threat modelling and mitigation techniques

Capable of conducting regular reviews of our mobile application security posture using your hands-on experience.

Develop and maintain pen-testing security tools, scripts, policies and procedures

In depth knowledge of mobile app security standards (Android/iOS)

Desirable knowledge & experience

Familiarity with mobile development, DevSecOps tooling, testing and automation frameworks.

Have deep knowledge and experience using the mobile security tools.

Good understanding of authentication, authorisation, encryption, and cryptography patterns.

Experience in proactive researching of new technologies emerging in the security landscape.

Senior iOS Software Engineer - £400 - Inside IR35 - Hybrid - Manchester

RECENTLY POSTED

Senior iOS Software Engineer - £400- Inside IR35 - Hybrid - ManchesterRecOps is partnered with one of the world’s largest broadcasters to bolster their existing engineering team with a Senior iOS Software Engineer.This role would be £400 per day, inside IR35 & would be hybrid with one to two days expected in Manchester.Skills/Knowledge/Experience used in the last 12 months or last Project:

Strong proficiency in Swift and Objective-C for iOS development.

Proven experience with Swift Package Manager (SPM)

Experience in migrating large-scale projects from CocoaPods to Swift Package Manager.

Expertise in Test Driven Development (TDD) and writing comprehensive unit tests to ensure code quality

If the above sounds like you, click apply.

Moodle Developer

Hays Specialist Recruitment

South Glamorgan

RECENTLY POSTED

TECH-AGNOSTIC ROLE

1 PER WEEK IN CARDIFF OFFICE

3-MONTH CONTRACT

Strong understanding of Moodle Mobile App.

Extensive Back End development skills.

Knowledge of AI-powered Chatbot development.

RESPONSIBILITIES

Improve Mobile App Improvements and Moodle Integration.

Taking a prominent role is Moodle Dashboard development.

Embedding AI Chatbot in Moodle.

What you need to do now If you’re interested in this role, click ‘apply now’ to forward an up-to-date copy of your CV, or call us now.Hays Specialist Recruitment Limited acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C’s, Privacy Policy and Disclaimers which can be found on our website.

Mobile Security Engineer

Intuition IT Solutions Ltd

RECENTLY POSTED

TECH-AGNOSTIC ROLE

Skills & experience:

Experience of Mobile platform security, threat modelling and mitigation techniques

Capable of conducting regular reviews of our mobile application security posture using your hands-on experience.

Develop and maintain pen-testing security tools, scripts, policies and procedures

In depth knowledge of mobile app security standards (Android/iOS)

Desirable knowledge & experience

Familiarity with mobile development, DevSecOps tooling, testing and automation frameworks.

Have deep knowledge and experience using the mobile security tools.

Good understanding of authentication, authorisation, encryption, and cryptography patterns.

Experience in proactive researching of new technologies emerging in the security landscape.

Hybrid: 2/3 days onsite in Bristol, UK.

Moodle Developer

Hays Technology

£400k/day - £450k/day

TECH-AGNOSTIC ROLE

1 PER WEEK IN CARDIFF OFFICE

3-MONTH CONTRACT

Strong understanding of Moodle Mobile App.

Extensive Back-End development skills.

Knowledge of AI-powered Chatbot development.

RESPONSIBILITIES

Improve Mobile App Improvements and Moodle Integration.

Taking a prominent role is Moodle Dashboard development.

Embedding AI Chatbot in Moodle.

What you need to do now If you’re interested in this role, click ‘apply now’ to forward an up-to-date copy of your CV, or call us now. If this job isn’t quite right for you, but you are looking for a new position, please contact us for a confidential discussion about your career.Hays Specialist Recruitment Limited acts as an employment agency for permanent recruitment and employment business for the supply of temporary workers. By applying for this job you accept the T&C’s, Privacy Policy and Disclaimers which can be found at (url removed)

Android Developer - SC Cleared

CBSbutler Holdings Limited trading as CBSbutler

£700/day - £780/day

Rate: 700 - 780 a dayIR35 Status: Inside IR35Location: WinchesterWorking pattern: Hybrid 2 / 3 days a weekYou will join a defence technology consultancy, and will support existing users, sustain the product, and contribute to the development of significant new product capability.The role will include taking ownership of new feature development and contributing to shaping end user requirements into actionable development activities.Key tasks:

Feature development

Providing support to existing users

Implementation of Edge Analytics Proof-of-Concept

Updates to automated testing infrastructure

Debugging and reliability improvements

Performance analysis of Android devices

Contribute to client visits and demos

Android app development (Android Studio/Gradle)

Experience using the Android Camera/camera2/CameraX API

Strong understanding of Android app architecture, particularly the activity lifecycle

Interest in AI & ML Edge Processing

Interfacing Android apps with Bluetooth and USB peripherals

Experience integrating 3rd party SDKs into Android apps

JavaScript/VueJS/Nuxt

Windows installation process/Wix Toolset

Android (11+) OS internals

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Frequently asked questions

What types of contract Mobile Engineer jobs are listed on Haystack?

Haystack features a wide variety of contract Mobile Engineer positions, including roles focused on iOS, Android, React Native, Flutter, and other mobile development frameworks across different industries.

How do I apply for contract Mobile Engineer jobs on Haystack?

To apply, create a profile on Haystack, upload your resume, and use the search filters to find contract Mobile Engineer positions. Click on the job posting and follow the application instructions, which usually include submitting your resume and cover letter.

Are the contract Mobile Engineer jobs on Haystack remote or onsite?

Haystack lists both remote and onsite contract Mobile Engineer jobs. You can filter search results based on your location preference and remote work options.

What should I include in my resume when applying for contract Mobile Engineer roles?

Highlight your mobile development skills, relevant frameworks, contract experience, project highlights, and ability to work independently within tight deadlines to appeal to employers seeking contract Mobile Engineers.

Does Haystack provide resources or support for contract Mobile Engineers?

Yes, Haystack offers career resources, interview tips, and insights into the contracting market to help Mobile Engineers succeed in securing and excelling in contract roles.

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