644 Kotlin Developer jobs in the United Kingdom
Freelance Software Developer (Kotlin) - AI Trainer
Posted 27 days ago
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Job Description
This opportunity is only for candidates currently residing in the specified country. Your location may affect eligibility and rates. Please submit your resume in English and indicate your level of English proficiency.
At Mindrift , innovation meets opportunity. We believe in using the power of collective intelligence to ethically shape the future of AI.
What we do
The Mindrift platform connects specialists with AI projects from major tech innovators. Our mission is to unlock the potential of Generative AI by tapping into real-world expertise from across the globe.
About the Role
GenAI models are improving very quickly, and one of our goals is to make them capable of addressing specialized questions and achieving complex reasoning skills. If you join the platform as an AI Tutor in Coding, you’ll have the opportunity to collaborate on these projects.
Although every project is unique, you might typically:
- Generate prompts that challenge AI.
- Define comprehensive scoring criteria to evaluate the accuracy of the AI’s answers.
- Correct the model’s responses based on your domain-specific knowledge.
How to get started
Simply apply to this post, qualify, and get the chance to contribute to projects aligned with your skills, on your own schedule. From creating training prompts to refining model responses, you’ll help shape the future of AI while ensuring technology benefits everyone.
Requirements
- You hold a Bachelor's or Master’s Degree in Computer Science, Software Engineering, Software Development, Computer Engineering, Information Technology or other related fields
- You have at least 3 years of Kotlin development experience (Android or server-side)
- Your level of English is advanced (C1) or above
- Strong knowledge of JVM ecosystem and Java interoperability
- Experience with Android SDK, Jetpack Compose, modern architecture (MVVM, Clean Architecture)
- Proficiency with coroutines, flows, async programming
- Familiarity with DI frameworks (Dagger/Hilt/Koin)
- Git workflows, code reviews, Agile/Scrum
- CI/CD pipelines, Docker, cloud platforms (AWS/Azure/GCP)
- Secure coding practices (OWASP)
- Debugging and optimization skills
- Ability to leverage AI-assisted development tools
- You are ready to learn new methods, able to switch between tasks and topics quickly and sometimes work with challenging, complex guidelines.
- Our freelance role is fully remote so, you just need a laptop, internet connection, time available and enthusiasm to take on a challenge.
Benefits
Why this freelance opportunity might be a great fit for you?
- Get paid for your expertise, with rates that can go up to $44/hour depending on your skills, experience, and project needs.
- Take part in a part-time, remote, freelance project that fits around your primary professional or academic commitments.
- Work on advanced AI projects and gain valuable experience that enhances your portfolio.
- Influence how future AI models understand and communicate in your field of expertise.
Freelance Developer Consultant (Kotlin) - AI Trainer
Posted 27 days ago
Job Viewed
Job Description
This opportunity is only for candidates currently residing in the specified country. Your location may affect eligibility and rates. Please submit your resume in English and indicate your level of English proficiency.
At Mindrift , innovation meets opportunity. We believe in using the power of collective intelligence to ethically shape the future of AI.
What we do
The Mindrift platform connects specialists with AI projects from major tech innovators. Our mission is to unlock the potential of Generative AI by tapping into real-world expertise from across the globe.
About the Role
GenAI models are improving very quickly, and one of our goals is to make them capable of addressing specialized questions and achieving complex reasoning skills. If you join the platform as an AI Tutor in Coding, you’ll have the opportunity to collaborate on these projects.
Although every project is unique, you might typically:
- Code generation and code review
- Prompt evaluation and complex data annotation
- Training and evaluation of large language models
- Benchmarking and agent-based code execution in sandboxed environments
- Working across multiple programming languages
- Adapting guidelines for new domains and use cases
- Following project-specific rubrics and requirements
- Collaborating with project leads, solution engineers, and supply managers on complex or experimental projects
Note: Flexibility and quick adaptation to new requirements are essential.
How to get started
Simply apply to this post, qualify, and get the chance to contribute to projects aligned with your skills, on your own schedule. From creating training prompts to refining model responses, you’ll help shape the future of AI while ensuring technology benefits everyone.
Requirements
- You hold a Bachelor's or Master’s Degree in Computer Science, Software Engineering, Software Development, Computer Engineering, Information Technology or other related fields
- You have at least 3 years of professional iOS/macOS development experience
- Your level of English is advanced (C1) or above
- Mid-level proficiency in Swift 5.9+, including SwiftUI, Combine, async/await, and the concurrency model
- Hands-on experience with testing frameworks (XCTest, Quick/Nimble) and UI automation testing
- Proficiency with Xcode, Swift Package Manager, and CI/CD tools (Fastlane, GitHub Actions, Xcode Cloud)
- Experience with App Store deployment and monitoring tools (Crashlytics, Firebase)
- Strong understanding of architectural patterns (MVVM, Clean Architecture) and performance optimization (ARC, Instruments)
- Experience integrating AI/ML capabilities (Core ML, Vision, Create ML)
- Practical use of AI-assisted tools for code generation, refactoring, and test automation
- Strong skills in crash analysis, memory debugging, and performance profiling
- You are ready to learn new methods, able to switch between tasks and topics quickly and sometimes work with challenging, complex guidelines.
- Our freelance role is fully remote so, you just need a laptop, internet connection, time available and enthusiasm to take on a challenge.
Benefits
Why this freelance opportunity might be a great fit for you?
- Get paid for your expertise, with rates that can go up to $44/hour depending on your skills, experience, and project needs.
- Take part in a part-time, remote, freelance project that fits around your primary professional or academic commitments.
- Work on advanced AI projects and gain valuable experience that enhances your portfolio.
- Influence how future AI models understand and communicate in your field of expertise.
Software Development Intern
Posted today
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Job Description
A Snapshot of Your Day
As a UK Software Development Intern (Finance) you will be joining a small team responsible for developing and maintaining internal accounting and controlling web applications. You will write code, design and query databases, manage cloud services and technical compliance in a corporate environment. This year long placement covers all aspects of software development as well as providing you a grounding in the Finance domain, with a focus on learning and improve skills that will further your career development.
The team are currently located near Bournemouth; therefore you will need to live or be willing to relocate to the Bournemouth area to fulfil the requirements of this role. You will be expected to work from the Bournemouth office every Tuesday & Wednesday as a minimum.
How You'll Make An Impact
- Develop small/medium changes to applications across the full tech stack, reporting your progress in weekly development standups,
- Familiarise yourself with the existing application landscape, evaluating implementation against 'best practices' and writing automated tests to enshrine existing functionality,
- Providing a "support first" service, acting as first point of contact for application users and escalating common themes or pain points to the development team,
- Act as "first gate" for accepting requirements and incidents into the weekly standup, investigating the technical feasibility/root cause,
- Manage deployments through from image building, through CI/CD pipelines, to container launches, escalating where necessary,
- Partner with our offshore support teams to document existing application processes and technical interventions,
- Partner with the Digital Core (DC) organisation to ensure compliance with all technical and cybersecurity requirements,
- Reconciling financial data between systems of record and the internal application landscape,
- Proactively suggesting simplifications to processes where it makes sense, designing sustainable technical solutions to drive efficiency, productivity and cost reduction,
- Ad hoc reporting.
Your opportunities for personal growth:
- Gain hands-on experience with developing internal applications in a rapid, iterative environment using a variety of open-source and proprietary software.
- Be a valued member of an international and supportive team. You will be encouraged to contribute across the whole scope of the team's activities.
- Seek out opportunities that will strengthen your skills and enhance your knowledge to continue to support the business and your career development path.
What You Bring
- You must have a clear interest in software development, a willingness to learn a variety of technologies and a desire to deepen your technical understanding.
- You must be working towards a degree in Computer Science, Mathematics, Cybersecurity or Software Development.
- You can work independently, safely and responsibly; take ownership of challenges, think logically, and proactively research your own solutions to technical challenges you encounter.
- An interest in finance and accounting is desirable as this role sits within a finance function.
About The Team
The Financial Planning and Analysis department sits in the Accounting and Controlling – this team's aim is to support the wider accounting department, particularly functional controlling, with digital solutions that provide them and our businesses with transparency.
Who is Siemens Energy?
At Siemens Energy, we are more than just an energy technology company. We meet the growing energy demand across 90+ countries while ensuring our climate is protected. With more than 100,000 dedicated employees, we not only generate electricity for over 16% of the global community, but we're also using our technology to help protect people and the environment.
Our global team is committed to making sustainable, reliable, and affordable energy a reality by pushing the boundaries of what is possible. We uphold a 150-year legacy of innovation that encourages our search for people who will support our focus on decarbonization, new technologies, and energy transformation.
Find out how you can make a difference at Siemens Energy: and Siemens Gamesa
Our Commitment to Diversity
Lucky for us, we are not all the same. Through diversity, we generate power. We run on inclusion and our combined creative energy is fueled by over 130 nationalities. Siemens Energy celebrates character – no matter what ethnic background, gender, age, religion, identity, or disability. We energize society, all of society, and we do not discriminate based on our differences.
Rewards/Benefits
- A competitive salary and performance-based bonuses
- Pension scheme with a competitive employer contribution
- 26 days holiday per annum
- Salary sacrifice schemes such as private medical & dental insurances, cycle to work, electric car scheme, discounted gym membership plus several other lifestyle benefits to suit you
Please note:- We reserve the right to close this advertisement at any time; so please ensure that you submit your application as soon as possible.
Software Development Manager
Posted 1 day ago
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Job Description
Software Development Manager
Posted 1 day ago
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Job Description
Software Development Engineer
Posted 16 days ago
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Job Description
Sitting within our Product Delivery organisation, the full-stack Software Developer works as a member of a multi-disciplined Agile team to develop and deliver our proprietary travel products and platforms. Contributing to the development process, the Software Developer helps generate delivery ideas and solutions whilst encompassing the full spectrum of design, coding, manual and automated testing. Playing a pivotal role, the Software Developer ensures successful delivery of key strategic objectives through the development of high quality full-stack software and supporting documentation.
**What You'll Do on a Typical Day**
+ Develop secure, enterprise-level web and server-side applications using React and C# whilst following and improving upon coding style standards and guidelines.
+ Effectively use source control, write unit tests and liaise internally with software testers to support the delivery of high quality bug-free code.
+ Leverage existing knowledge to use the correct development approach, whilst adapting to the task at hand.
+ Follow best practices around .NET secure coding and PCI-DSS compliance.
+ Assist in the creation and progression of technical documentation for modules and features.
+ Participate in Agile Scrum ceremonies, work with JIRA and Confluence tools.
+ Work with key stakeholders to understand, develop and deliver customer requirements.
+ Share knowledge of modern development techniques, coach, and mentor other team members.
+ Use available technical and non-technical resources to develop and maintain a good understanding of the travel industry, our products, and services.
**What Technical Skills** **You'll** **Develop**
+ .NET 8+, C#, ASP.NET MVC
+ React, NextJS, Redux
+ Advanced Javascript, Typescript
+ Entity Framework Core
+ Web API, RESTful services
+ Unit testing (NUnit/XUnit)
+ Playwright test automation
+ HTML, CSS, JSON
+ T-SQL, SQL Server
**What We're Looking For**
+ Advanced coding ability in C# and React.
+ Experience designing and architecting secure, scalable applications.
+ Experience modernising complex legacy applications.
+ Knowledge of legacy technologies like: ASP.NET Webforms, Visual Basic, .Net Framework 4.5 - 4.8.
+ Able to understand and develop advanced SQL, Stored Procedures.
+ Experience working effectively in a collaborative Agile Scrum environment.
+ Very good understanding of software engineering fundamentals, Object Oriented Design, SOLID principles, common design patterns.
+ Experience with Git, CI/CD and Azure DevOps pipelines.
+ Knowledge of test automation would be an asset.
+ Knowledge of Microservice architectures would be an asset.
+ Able to communicate effectively in written and spoken English.
+ Educated to A-Level.
UK CITIZENSHIP OR AT LEAST MORE THAN A 5 YEARS UK RESIDENT PERMIT
#GBTJobs
**Location**
United Kingdom
**The #TeamGBT Experience**
Work and life: Find your happy medium at Amex GBT.
+ **Flexible benefits** are tailored to each country and start the day you do. These include health and welfare insurance plans, retirement programs, parental leave, adoption assistance, and wellbeing resources to support you and your immediate family.
+ **Travel perks:** get a choice of deals each week from major travel providers on everything from flights to hotels to cruises and car rentals.
+ **Develop the skills you want** when the time is right for you, with access to over 20,000 courses on our learning platform, leadership courses, and new job openings available to internal candidates first.
+ **We strive to champion Inclusion** in every aspect of our business at Amex GBT. You can connect with colleagues through our global INclusion Groups, centered around common identities or initiatives, to discuss challenges, obstacles, achievements, and drive company awareness and action.
+ And much more!
All applicants will receive equal consideration for employment without regard to age, sex, gender (and characteristics related to sex and gender), pregnancy (and related medical conditions), race, color, citizenship, religion, disability, or any other class or characteristic protected by law.
Click Here ( for Additional Disclosures in Accordance with the LA County Fair Chance Ordinance.
Furthermore, we are committed to providing reasonable accommodation to qualified individuals with disabilities. Please let your recruiter know if you need an accommodation at any point during the hiring process. For details regarding how we protect your data, please consult the Amex GBT Recruitment Privacy Statement ( .
**What if I don't meet every requirement?** If you're passionate about our mission and believe you'd be a phenomenal addition to our team, don't worry about "checking every box;" please apply anyway. You may be exactly the person we're looking for!
Click Here to Learn More (
Graduate - Software Development
Posted 17 days ago
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Job Description
**Vacancy details**
**General information**
**Entity**
Safran is an international high-technology group, operating in the aviation (propulsion, equipment and interiors), defense and space markets. Its core purpose is to contribute to a safer, more sustainable world, where air transport is more environmentally friendly, comfortable and accessible. Safran has a global presence, with 100,000 employees and sales of 27.3 billion euros in 2024, and holds, alone or in partnership, world or regional leadership positions in its core markets.
Safran is in the 2nd place in the aerospace and defense industry in TIME magazine's "World's best companies 2024" ranking.
Safran Electronics & Defense offers its customers onboard intelligence solutions allowing them to understand the environment, reduce mental load and guarantee a trajectory, even in critical situations, in all environments: on land, at sea, in the sky or space. The company harnesses the expertise of its 13,000 employees towards these three functions: observe, decide and guide, for the civil and military markets.
**Reference**
**Position description**
**Domain**
Production
**Job field / Job profile**
IT - IT operations management
**Job title**
Graduate - Software Development
**Employment type**
Graduate Program
**Professional category**
Student
**Part time / Full time**
Full-time
**Job description**
Digital Operations Graduate
Location: Wolverhampton
Contract: 3-year graduate programme
Start Date: September 2026
What does the role look like?
Our Digital Operations Graduate Programme offers hands-on experience within a fast-paced, collaborative digital environment. Based in Wolverhampton, you'll support a range of digital services and technology functions across the business - from data analytics and web development to system design and agile delivery.
Throughout the programme, you'll rotate across key areas such as database management, data visualisation, and software tools, building a strong foundation in both technical and analytical skills. Working alongside experienced professionals, you'll help design, develop, and maintain digital solutions that drive smarter ways of working across Safran's operations.
This role is ideal for graduates who are passionate about technology and eager to apply their creativity, curiosity, and problem-solving skills to real business challenges in aerospace and manufacturing.
___
What will your day-to-day responsibilities look like?
- Supporting the creation, maintenance, and querying of databases to ensure data integrity and security.
- Analysing and reporting on large datasets using tools such as SAP ERP, Power BI, and Tableau to create KPIs and dashboards.
- Assisting in the development and maintenance of internal web-based tools (front-end and back-end).
- Contributing to UI/UX design, wireframing, and prototyping using tools such as Figma.
- Building responsive front-end interfaces (HTML, CSS, Bootstrap) and supporting back-end logic (PHP, Python, JavaScript).
- Collaborating with internal stakeholders to gather requirements, demonstrate prototypes, and refine solutions.
- Participating in agile delivery cycles including daily stand-ups, sprint planning, and retrospectives.
- Supporting documentation, knowledge sharing, and best practice across the team.
**But what else? (benefits, specificities, etc.)**
- Competitive salary (£30,000)
- Company performance bonus scheme
- Pension scheme - up to 10% employer contribution
- Private medical insurance
- Comprehensive health cash plan
- 25 days annual leave + bank holidays
- Flexible benefits programme (holiday trading, gym discounts, enhanced parental leave)
- Structured graduate training & career development, including support towards professional accreditation
- Opportunity to participate in community and STEM projects & more!
**Candidate skills & requirements**
What will you bring to the role?
Essential skills:
- A degree (or working towards) in Computer Science, IT, Data Science, or a related field.
- Basic knowledge of databases and data handling principles.
- Experience with front-end technologies (HTML, CSS, JavaScript).
- Experience with back-end programming languages (PHP, Python, or JavaScript).
- Strong communication, analytical, and problem-solving skills.
- Ability to work collaboratively and adapt in a fast-moving environment.
Desirable skills:
- Experience with data visualisation tools (Tableau, Power BI).
- Exposure to SAP ERP systems.
- Familiarity with UI/UX design principles and tools (e.g. Figma).
- Experience working in agile or iterative environments.
- Understanding of server infrastructures, version control, or deployment workflows.
___
About us
Safran is a global leader in aerospace and defence, trusted for our expertise in fly-by-wire, hydraulic, and electro-hydraulic actuation systems. Our mission is to make aviation smarter, safer, and more sustainable.
Watch our company overview video - proud to be an equal opportunities employer, welcoming applications from all backgrounds, especially from groups currently underrepresented in aerospace.
___
Recruitment Process & Timeline
We believe in making our recruitment process transparent and rewarding:
1. Application - Apply online with your CV.
2. Quick Personality & Motivational Assessment (October 2025) - A 10-15 minute mobile questionnaire using a simple swipe-right/left style. You'll also receive your own personalised feedback report to use however you wish.
3. HireVue Video Interview (October-November 2025) - Record responses to three short questions (max 5 minutes each). Hiring teams will review these and select candidates for the next stage.
4. Assessment Centre - Onsite in Wolverhampton (December 2025) - Includes an interview, presentation, and group tasks. You'll also meet the hiring team and gain a deeper understanding of the role and expectations.
5. Final Decision (January 2026) - Offers will be made by this date at the latest.
___
Apply now and start your digital career with Safran - where innovation and opportunity take flight.
Please note that potential candidates will be subject to Baseline Personnel Security Standard (BPSS) and background checks, and that project access restrictions may apply to some nationalities.
**Position location**
**Job location**
Europe, UK, England, West Midlands
**City (-ies)**
Wolverhampton
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Software Development Graduate
Posted 13 days ago
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Job Description
Responsibilities:
- Assist in the design, development, testing, and deployment of software applications under the guidance of senior developers.
- Write clean, efficient, and well-documented code in one or more programming languages (e.g., Python, Java, JavaScript, C++).
- Participate in code reviews, providing and receiving constructive feedback to improve code quality.
- Collaborate with cross-functional teams, including product managers and QA engineers, to understand project requirements and deliver high-quality solutions.
- Contribute to the troubleshooting and debugging of software issues.
- Learn and apply agile development methodologies and best practices.
- Develop an understanding of version control systems (e.g., Git) and CI/CD pipelines.
- Research and implement new technologies and tools to enhance product functionality and performance.
- Actively participate in team meetings, stand-ups, and retrospectives.
- Document technical designs, processes, and solutions.
- Engage in continuous learning to expand technical skills and knowledge base.
- Contribute to the company’s collaborative and innovative remote work culture.
- Recent graduate with a Bachelor's or Master's degree in Computer Science, Software Engineering, or a related technical field.
- Strong foundational knowledge of computer science principles, algorithms, and data structures.
- Proficiency in at least one object-oriented programming language.
- Familiarity with web development technologies (HTML, CSS, JavaScript) is a plus.
- Understanding of software development lifecycle and methodologies.
- Excellent problem-solving and analytical skills.
- Strong communication and teamwork abilities, even in a remote setting.
- Self-motivated, eager to learn, and able to work independently with minimal supervision.
- A genuine passion for software development and technology.
- Ability to manage time effectively and meet deadlines in a remote work environment.
- Previous internship or personal project experience in software development is beneficial.
Apprenticeship - Software Development
Posted 14 days ago
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Job Description
What You Will Do:
- Assist in the development, testing, and maintenance of software applications.
- Learn and apply various programming languages and development tools.
- Participate in code reviews and contribute to team discussions.
- Help in troubleshooting and debugging software issues.
- Work on developing new features and enhancements for existing software.
- Collaborate with senior developers and project managers to understand project requirements.
- Gain practical experience in Agile development methodologies.
- Contribute to the creation of technical documentation.
- Learn about database management and integration.
- Develop problem-solving skills by tackling coding challenges.
- Understand software development lifecycle best practices.
What We Are Looking For:
- A genuine interest in software development and technology.
- Strong analytical and problem-solving abilities.
- Good communication and teamwork skills.
- A proactive and motivated attitude towards learning.
- GCSEs in Maths and English (or equivalent) are essential.
- A-Levels or a Level 3 qualification in a relevant subject (e.g., IT, Computing) are advantageous but not essential.
- Willingness to commit to a structured apprenticeship program, including off-the-job training and assessments.
- Ability to work effectively within a team environment.
- Demonstrate potential and a passion for building a career in software development.
- The ability to attend the workplace in Sheffield on a consistent basis.
Apprenticeship - Software Development
Posted 22 days ago
Job Viewed
Job Description
Key responsibilities and learning opportunities include:
- Assisting in the design, development, testing, and maintenance of software applications.
- Learning and applying various programming languages (e.g., Python, Java, C#, JavaScript).
- Participating in code reviews and collaborating with team members to improve code quality.
- Understanding software development methodologies such as Agile and Scrum.
- Troubleshooting and debugging software issues.
- Contributing to the creation of technical documentation.
- Learning about database management and web technologies.
- Developing an understanding of version control systems like Git.
- Working towards a recognized qualification in software development.
- Developing essential professional skills such as teamwork, communication, and time management.