22 mobile app developer jobs found in London

About us Founded in 2019 and part of Y Combinator's 2020 cohort, Photoroom is the leading visual solution for e-commerce. We've raised Series B funding and reached 300+ million users worldwide, processing over 5 billion images annually and serving both small businesses and major enterprises like Amazon, DoorDash, and Decathlon through our mobile app, web platform, and API. We're a remote-friendly team of 100+ passionate builders giving e-commerce businesses superpowers to create visuals that help them grow, making the hardest parts of selling online disappear. We focus on craft, innovation, and collaboration, creating exceptional impact for e-commerce businesses worldwide. We are looking for a strong Python engineer to take ownership of the public API that powers how developers integrate Photoroom into their products. This is a high-impact role at the intersection of developer experience and applied AI, where you’ll shape the interface used by both...

About Fliprly Fliprly is the world’s first and only mobile app dedicated to buying and selling domains, websites, mobile apps, and other digital assets. Our iOS app and web platform are live, and we’re now ready to expand our reach with a robust Android app. Join us on this exciting journey to revolutionize the digital asset marketplace! What We’re Looking For We’re seeking a skilled Android Developer (freelancer or agency) to build the Android version of Fliprly from scratch. You’ll work closely with our existing team and leverage our iOS/web apps as references for functionality and design consistency. Responsibilities Build a high-performance Android app using Java. Translate our iOS design and features into the Android ecosystem. Integrate APIs and backend services (already available). Ensure a smooth, responsive, and bug-free user experience. Requirements Proven experience building Android apps (at...

Fliprly is the world’s first and only mobile app dedicated to buying and selling domains, websites, mobile apps, and other digital assets. Our iOS app and web platform are live, and we’re now ready to expand our reach with a robust Android app. Join us on this exciting journey to revolutionize the digital asset marketplace! What We’re Looking For We’re seeking a skilled Android Developer (freelancer or agency) to build the Android version of Fliprly from scratch. You’ll work closely with our existing team and leverage our iOS/web apps as references for functionality and design consistency. Responsibilities Build a high-performance Android app using Java. Translate our iOS design and features into the Android ecosystem. Integrate APIs and backend services (already available). Ensure a smooth, responsive, and bug-free user experience. Requirements Proven experience building Android apps (at least 4 solid live...

Waracle are looking for a Senior Mobile Flutter Developer on a contract basis for an exciting new role joining our world-class digital technology consultancy and home to a diverse, smart, curious and ambitious community of specialists in technology-driven transformation.   We work with ambitious clients to help them solve their biggest business and customer challenges. We help our clients to innovate and create intelligent digital products and services. We thrive on complex challenges and deliver business-critical IT transformation projects, moving seamlessly from strategy, design and delivery to operations.   This is a hybrid role, with 2 days per week working from any of our UK offices (London, Glasgow, Edinburgh, or Dundee). This role is Inside IR35 on a contract basis.   Role Overview   A s a Senior Mobile Flutter Devel oper at Waracle, you will be responsible for designing and delivering end-to-end features and small...

Project Manager   Rate: £605.55 per day (via umbrella) Duration: 6 months Location: London – Hybrid working model (2 days on-site)   You will lead an end-to-end remediation programme to identify, quantify, and correct invoice and VAT-related charging issues across defined periods. The role has full accountability for the data-led investigation, customer impact assessment, refund and repayment calculations, customer communications strategy, and operational delivery controls. You will work closely with Finance, Tax/VAT, Loan Operations, Complaints, Relationship Managers (RMs), and Compliance/Legal to deliver a compliant and customer-focused outcome.   Key Responsibilities Programme Leadership & Governance Own the remediation scope, assumptions, delivery plan, and timelines; manage RAID and interdependencies. Establish governance, reporting cadence, and a robust audit trail suitable for internal and...

  About Voodoo Founded in 2013, Voodoo is a tech company that creates mobile games and apps with a mission to entertain the world. Gathering 800 employees, 7 billion downloads, and over 200 million active users, Voodoo is the #3 mobile publisher worldwide in terms of downloads after Google and Meta. Our portfolio includes chart-topping games like Mob Control and Block Jam, alongside popular apps such as BeReal and Wizz. This position is fully remote within CET ±3h.   Team Joining our Live games team means collaborating with gaming industry experts on globally renowned, enduring games while embracing exciting new entrepreneurial ventures. With over seven billion downloads worldwide and a portfolio of more than 10 resilient hybrid games generating more than $20m per year, we are the world's largest and most successful hybrid publisher. You will be joining one of our Live Studios, working on Hole.io , one of Voodoo's top games....

Senior Flutter Developer - Outside IR35 - Contract   A rare opportunity to join our fast-growing technology company selling high-value software development services. An ideal role for an experienced and dynamic developer who wants to be involved with an exciting and challenging project.   Must have   Several years of experience developing customer-facing mobile apps for both iOS and Android, using Flutter. Experience working as part of a team (including tools to support collaboration, such as git and user story management software) Experience working closely with other job roles, such as designers and product owners   Nice to have   Experience with mobile back-end development / Node Experience of CI/CD/DevOps for mobile apps Experience collaborating with clients or stakeholders, including clarifying requirements and presenting work at sprint demos Have experience delivering great outcomes for...

Job Introduction Handelsbanken UK is embarking on a digital transformation programme to enhance the customer experience through increased choice and flexibility around our digital channel proposition. Working closely with Group colleagues, the UK Bank will deliver an ambitious programme of work to the core online and mobile platforms that will afford improved functionality and a more seamless user experience. The automation Test Analyst supports of our IT modernisation efforts who will be required to drive forwards the multi level testing of key system developments. This role will be responsible for testing a catalogue of new features, working collaboratively with UK and Swedish development teams, whilst focusing on the timely delivery of agreed outcomes that meet both business and customer needs. This role is to enable a fast feedback loop for the development teams working on business-critical features. You will be looking after the test planning, the ability to develop a...

Senior Flutter Developer - Outside IR35 - Contract   A rare opportunity to join our fast-growing technology company selling high-value software development services. An ideal role for an experienced and dynamic developer who wants to be involved with an exciting and challenging project.   Must have   Several years of experience developing customer-facing mobile apps for both iOS and Android, using Flutter. Experience working as part of a team (including tools to support collaboration, such as git and user story management software) Experience working closely with other job roles, such as designers and product owners   Nice to have   Experience with mobile back-end development / Node Experience of CI/CD/DevOps for mobile apps Experience collaborating with clients or stakeholders, including clarifying requirements and presenting work at sprint demos Have experience delivering great outcomes for...

UX & UI Designer (six month contract)   Who We Are and What We Do   At SilverRail, we're on a mission to reshape the way the world travels, and we're inviting you to be part of this journey. Rail is becoming the go-to choice for short and medium-haul travel worldwide, and we're here to help make it happen.   In the face of the ongoing climate crisis, our vision is crystal clear. We are transforming the online customer experience for rail travel, making it easier than ever for customers to find, buy and use rail. Our cutting-edge technology is the backbone of rail and travel agencies worldwide, making it effortless for travellers to choose the eco-friendly option and reduce their carbon footprint.   We have more than 15 years of trailblazing success behind us, and our teams are spread across the globe, with bases in London, Boston, Brisbane, and Stockholm. We thrive on the philosophy of 'fail-fast-fail-early,'...

  About Voodoo Founded in 2013, Voodoo is a tech company that creates mobile games and apps with a mission to entertain the world. Gathering 800 employees, 7 billion downloads, and over 200 million active users, Voodoo is the #3 mobile publisher worldwide in terms of downloads after Google and Meta. Our portfolio includes chart-topping games like Mob Control and Block Jam, alongside popular apps such as BeReal and Wizz. This position is fully remote within CET ±3h.   Team Joining our Live games team means collaborating with gaming industry experts on globally renowned, enduring games while embracing exciting new entrepreneurial ventures. With over seven billion downloads worldwide and a portfolio of more than 10 resilient hybrid games generating more than $20m per year, we are the world's largest and most successful hybrid publisher. You will be joining one of our Live Studios, working on Hole.io , one of Voodoo's top games....

Key Responsibilities: · Opportunity Identification & Mobilization o Partner with business and operational leaders to identify transformation opportunities across hospitality, operations, and technology. o Assess viability, alignment to business goals, and strategic impact of new ideas. o Facilitate discovery workshops and early business case development. · Project Planning & Commercial Approval o Rapidly develop initial project charters, timelines, and high-level delivery roadmaps. o Lead cost-benefit analysis and support commercial approvals in alignment with transformation governance. o Ensure risk, impact, and stakeholder assessments are in place for early decisions. · Team Mobilization & Delivery Kick-off o Build and align cross-functional teams to kick off approved initiatives. o Establish delivery governance, cadence, reporting structures, and KPIs. o Lead early-stage execution (typically 6–12...

About IconicShift IconicShift AI is building a platform that turns founder intent into usable strategic outputs — clear strategies, investor-grade pitches, and practical roadmaps. It is based on the experience of Mike Harris, founding CEO of First Direct (the world’s first telephone bank), founding CEO of Egg (the world’s first internet bank), and CEO of Mercury Communications (that created some of the UK’s first mobile and cable networks). Most founders don’t fail because they lack ideas or options. They fail because their thinking drifts and they can’t afford the experienced support they need. Their story changes, priorities multiply, and the business loses its single direction. Most AI approaches just help them fail faster by accelerating rushed decisions. IconicShift works by creating a single source of strategic truth, where every decision is tracked and held to account. It refuses to move forward without explicit acceptance of core strategic bets, ensuring...

  About Voodoo Founded in 2013, Voodoo is a tech company that creates mobile games and apps with a mission to entertain the world. Gathering 800 employees, 7 billion downloads, and over 200 million active users, Voodoo is the #3 mobile publisher worldwide in terms of downloads after Google and Meta. Our portfolio includes chart-topping games like Mob Control and Block Jam, alongside popular apps such as BeReal and Wizz. This position is fully remote within CET ±3h.   Team Joining our Live games team means collaborating with gaming industry experts on globally renowned, enduring games while embracing exciting new entrepreneurial ventures. With over seven billion downloads worldwide and a portfolio of more than 10 resilient hybrid games generating more than $20m per year, we are the world's largest and most successful hybrid publisher. You will be joining one of our Live Studios, working on Hole.io , one of Voodoo's top games....

UX & UI Designer (six month contract)   Who We Are and What We Do   At SilverRail, we're on a mission to reshape the way the world travels, and we're inviting you to be part of this journey. Rail is becoming the go-to choice for short and medium-haul travel worldwide, and we're here to help make it happen.   In the face of the ongoing climate crisis, our vision is crystal clear. We are transforming the online customer experience for rail travel, making it easier than ever for customers to find, buy and use rail. Our cutting-edge technology is the backbone of rail and travel agencies worldwide, making it effortless for travellers to choose the eco-friendly option and reduce their carbon footprint.   We have more than 15 years of trailblazing success behind us, and our teams are spread across the globe, with bases in London, Boston, Brisbane, and Stockholm. We thrive on the philosophy of 'fail-fast-fail-early,'...

QA Tester (Day rate Contract) { ʺdescription ʺ: ʺ Job Introduction Handelsbanken UK is embarking on a digital transformation programme to enhance the customer experience through increased choice and flexibility around our digital channel proposition. Working closely with Group colleagues, the UK Bank will deliver an ambitious programme of work to the core online and mobile platforms that will afford improved functionality and a more seamless user experience. The automation Test Analyst supports of our IT modernisation efforts who will be required to drive forwards the multi level testing of key system developments. This role will be responsible for testing a catalogue of new features, working collaboratively with UK and Swedish development teams, whilst focusing on the timely delivery of agreed outcomes that meet both business and customer needs. This role is to enable a fast feedback loop for the development teams working on business-critical features. You will be looking...

  About Voodoo Founded in 2013, Voodoo is a tech company that creates mobile games and apps with a mission to entertain the world. Gathering 800 employees, 7 billion downloads, and over 200 million active users, Voodoo is the #3 mobile publisher worldwide in terms of downloads after Google and Meta. Our portfolio includes chart-topping games like Mob Control and Block Jam, alongside popular apps such as BeReal and Wizz. This position is fully remote within CET ±3h.   Team Joining our Live games team means collaborating with gaming industry experts on globally renowned, enduring games while embracing exciting new entrepreneurial ventures. With over seven billion downloads worldwide and a portfolio of more than 10 resilient hybrid games generating more than $20m per year, we are the world's largest and most successful hybrid publisher. Voodoo is creating a talented team with a big mission: find the next best way to entertain the world by...

Key Responsibilities: · Opportunity Identification & Mobilization o Partner with business and operational leaders to identify transformation opportunities across hospitality, operations, and technology. o Assess viability, alignment to business goals, and strategic impact of new ideas. o Facilitate discovery workshops and early business case development. · Project Planning & Commercial Approval o Rapidly develop initial project charters, timelines, and high-level delivery roadmaps. o Lead cost-benefit analysis and support commercial approvals in alignment with transformation governance. o Ensure risk, impact, and stakeholder assessments are in place for early decisions. · Team Mobilization & Delivery Kick-off o Build and align cross-functional teams to kick off approved initiatives. o Establish delivery governance, cadence, reporting structures, and KPIs. o Lead early-stage execution (typically 6–12...

About IconicShift IconicShift AI is building a platform that turns founder intent into usable strategic outputs — clear strategies, investor-grade pitches, and practical roadmaps. It is based on the experience of Mike Harris, founding CEO of First Direct (the world’s first telephone bank), founding CEO of Egg (the world’s first internet bank), and CEO of Mercury Communications (that created some of the UK’s first mobile and cable networks). Most founders don’t fail because they lack ideas or options. They fail because their thinking drifts and they can’t afford the experienced support they need. Their story changes, priorities multiply, and the business loses its single direction. Most AI approaches just help them fail faster by accelerating rushed decisions. IconicShift works by creating a single source of strategic truth, where every decision is tracked and held to account. It refuses to move forward without explicit acceptance of core strategic bets, ensuring...

Department: Project Services & Change Team: Project Services & Change Location: London with hybrid working Position type: 6-month contract (umbrella – inside IR35); ASAP start date (preferably April 2026) What the hiring manager says “This is a very exciting opportunity to join our agile, fast-paced, and versatile team of project and programme professional, driving our Marketing Ambition programme. You’ll lead the delivery of multiple transformation initiatives, connect people and teams across the organisation, and enable effective collaboration with external partners. You will play a pivotal role in orchestrating execution across a number of cross-organisational strategic activities, creating meaningful and tangible impact to the GSMA, its members and the wider mobile ecosystem.” Anna Campbell, Head of Project Services & Change About the team   The Project Services & Change Team in the GSMA provides project...