126 to 150 of 158 Kotlin Jobs in London

Nice to have Hands-on experience with scraping technologies at scale and maintaining data quality/accuracy. Experience building backend systems with Java or Kotlin (or another JVM language). Experience with Spring (or similar JVM frameworks). Experience operating data-heavy systems with strong observability (monitoring, alerting, data … domain and engineering practices, and helped improve how the team works. Qualifications What does it take: 5+ years of experience in Java or Kotlin (or other JVM based language) Strong experience with Spring framework, relational databases, distributed and concurrent systems (Kafka) Experience in scraping technologies at scale and maintaining ...

know their strengths, their limits, and when to reach beyond them. That's where your native knowledge comes in: whether it's Swift, Kotlin, or both, you're comfortable dropping into native code when the situation calls for it when it comes to performance, platform APIs, or something Expo … shared React Native codebase, with a solid understanding of platform‐specific behaviour and constraints. Native mobile experience in Swift (iOS) and/or Kotlin (Android) is desirable. You can read, write, and debug native code. Strong understanding of mobile performance. You know how to diagnose and fix issues across ...

Principal Android Engineer – Search & Recommendations Experience Team We are looking for a technical leader who will shape the native search and discovery experiences across our global travel platforms. In this role you will architect, design ...

revenue-critical infrastructure - on-call matters here. Tech stack We hire for ability, not a specific tech stack. Most of the team learned Kotlin here: Backend: Kotlin (modular monolith using Http4k, Spring Boot, Exposed, Result4k). Storage: Postgres, BigQuery. AI Platform: Vertex AI, Langsmith, more to come here. ...

Mobile Development, iOS, Android, Claude AI, Cursor, AI, Agentic AI, Swift, Kotlin, CI/CD for mobile (Xcode Cloud, Bitrise etc), Machine Learning, ML, API's, REST NEW JOB ARRIVED AND WHAT A BRILLIANT OPPORTUNITY IT IS TOO. Permanent. Hybrid. Must be UK-based and happy to travel … help the next stage of its business growth thrive. A strong hands-on background of Mobile Development is needed across both Swift and Kotlin ecosystems. Management/Leadership experience also essential. The role will help define the technical vision for my client's mobile platform, adopting agentic AI tools ...

maintain mobile client components that capture and report listening and user behavior signals across Spotify. Build high-quality, well-tested, and well-documented Kotlin code that contributes to business-critical datasets used for royalty reporting, analytics, experimentation, and personalization. Collaborate with engineers across Android, iOS, backend, and data teams … software quality. Contribute to a culture of continuous learning, knowledge sharing, and technical excellence. Qualifications You have experience developing Android and iOS applications using Kotlin with Swift or Objective-C. You know how to build maintainable, scalable, and well-tested software systems. You are comfortable working within large codebases ...

role Purpose of the role: We are looking for an experienced Full Stack Engineer (Front-end focus but also holding experience in Java or Kotlin on the back-end), to join a high-performing engineering team building the next generation of a business-critical platform that supports Sales teams … responsive web applications. Experience with modern front-end frameworks and tooling, including Next.js and Tailwind CSS. Experience developing or integrating with Java or Kotlin-based backend services, with a solid understanding of Object-Oriented Design principles. Proven use of agile engineering practices including TDD, pair programming, continuous integration ...

norms. Taptap Send is a cross-platform mobile app developed with React Native and TypeScript, which talks to a backend service written in Kotlin and backed by a PostgreSQL database, all of which runs on AWS and is managed via Terraform and Ansible. This is a backend-focused role … ship working features Work in an iterative fashion Evaluate and deliver timeline estimates Requirements: 7+ years of professional experience building backend systems Proficiency with Kotlin or Java/JVM Proficiency with PostgreSQL Experience with AWS: S3, SQS, SNS, Lambda, etc. Experience implementing and managing elaborate integrations with third-party ...

Senior Product Engineer, React Native Location: Nine Elms, London. Full time, hybrid with at least 3 days a week on site. You’ll need the right to work in the UK and be based in ...

Salt Digital Recruitment is seeking a Senior Kotlin Software Engineer for an investment banking client in London. This hybrid role involves developing backend services in a fast-paced environment, focusing on high-quality engineering and collaboration. The ideal candidate will have strong Kotlin development experience, skilled ...

Solutions is seeking a Mobile Head in London to lead a small two-developer team. The role requires hands-on expertise in Swift and Kotlin and a track record of leadership in technical teams. You will define the mobile tech vision, implement best practices, and integrate AI tools ...

seeking a Mobile Head to lead a small technical team in London. This role requires a hands‐on developer with expertise in Swift and Kotlin, alongside leadership experience. The position involves defining the technical vision for mobile platforms, integrating agentic AI tools, and ensuring best practices across development. ...

up. The role offers a salary up to £120k and equity shares. You will collaborate with the CTO on the system's architecture using Kotlin, Java, SpringBoot, and AWS. Enjoy a hybrid work environment with remote work and occasional office visits. Ideal candidates have strong software engineering skills ...

Decide when to use hybrid vs fully native approaches Lead architecture, spikes, and proof-of-concepts Define integration patterns between React Native, Swift, and Kotlin Set standards for packaging, versioning, and native module bridging Partner with iOS/Android architects on cross-platform design decisions Drive experimentation with WebView … What You Bring Strong production experience with React Native at scale Excellent JavaScript/TypeScript and modern React knowledge Working knowledge of Swift and Kotlin Experience integrating React Native into native mobile apps Strong understanding of mobile performance and platform constraints Experience in complex, multi-team engineering environments Bonus ...

engineering excellence. The role is based in London and the team is international. What you will do Design, build, and operate backend services in Kotlin and Python that power our trading products, from core trading workflows to client-facing APIs. Develop and improve services for order management, market data … technical decisions, writing clean, maintainable code and sharing knowledge across the team. What you will need Professional experience building backend services, ideally in Kotlin and/or Python. Solid experience designing and building backend services and REST APIs; experience with WebSockets or other real-time streaming protocols such ...

from backend services to user‐facing tools used by merchants and internal teams. Design and implement scalable backend services, working with technologies such as Kotlin, Python, and Go. Develop high‐quality web applications using React , focused on usability and performance. Take ownership of large, cross‐team initiatives , driving them … Core requirements Strong full‐stack engineering experience , with a solid backend foundation. Strong experience with React and building product‐facing web applications. Experience with Kotlin, Python, and Go in production environments is strongly preferred. Proven ability to take ownership in ambiguous environments , driving initiatives from idea to delivery. Experience ...

Principal Product Engineer, React Native Location: Nine Elms, London. Full time, hybrid with at least 3 days a week on site. You'll need the right to work in the UK and be based in ...

Experience owning outcomes and decision making, solving ambiguous problems and influencing stakeholders;deep expertise in domain. link Copy link Bachelor's degree or equivalent practical experience. 8 years of experience in software development. 5 years ...

Senior Kotlin Engineer (XP, GCP) – Investment Banking – London/Hybrid Daily rate: £600 - £800 (inside IR35) Duration: 6 months Start: ASAP My client is looking for an experienced Senior Kotlin engineer to support and extend a cloud-hosted platform used for bookbuilding issuances within Investment Banking Capital Markets. … platform in production, using incidents and defects as opportunities to improve system design and resilience Qualifications Strong commercial experience building backend services using Kotlin Experience with event‐sourced and event‐driven architectures Deep familiarity with XP practices, including mob programming as a primary way of working, test‐driven development ...

Spotify in London is seeking a mobile engineer to develop Android and iOS components in Kotlin, contributing to data-heavy royalty reporting and personalization. You will collaborate with Android, iOS, backend and data teams to deliver end-to-end solutions, while improving architecture and system reliability. The role emphasizes ...

Taptap Send is seeking a Senior Backend Engineer in London to scale our Kotlin/Java services and data pipelines, supporting remittances across countries. You will own backend integrations, design scalable architectures, and collaborate with Product, Ops, and Support to deliver reliable features on AWS. As an early team … member, you’ll influence culture and processes, working across stack from Kotlin services to PostgreSQL databases, with Terraform/Ansible managed infrastructure and data-driven #J-18808-Ljbffr ...

Equity Derivatives front office. You’ll lead and inspire a high‐performing, globally distributed engineering team, while staying hands‐on with solution design and Kotlin development. You’ll set the standard by leading from the front, bringing proven experience building, deploying and supporting large‐scale EQD pre‐trade platforms … high‐performing, globally distributed engineering team, with a strong focus on mentoring and coaching. Stay hands‐on with architecture and design, and contribute through Kotlin coding and code reviews where it adds most value. Drive transformation and modernisation across the pre‐trade platform, improving scalability, resilience and time ...

management role for a builder-leader. You will lead a team of strong staff and senior engineers through a critical transition: evolving from a Kotlin-first SDK to a hybrid architecture that makes Python a first-class citizen for agentic development. You will own delivery of the platform roadmap … drive decisions. Own the team's cost and resourcing decisions: LLM spend, infrastructure costs, headcount. For more context, our tech stack currently includes AWS, Kotlin, Python, Kubernetes. LiteLLM, BrainTrust, Temporal, LLM APIs and more. You do not need to be an expert across all of these, but need enough ...

Fairygodboss is looking for a Senior Lead Software Engineer (Platform) to set technical direction across squads, ensuring the implementation of robust engineering standards and best practices. The role involves developing secure, high-quality code and ...

Salt Digital Recruitment is seeking a Senior Kotlin Engineer in London/Hybrid to support and extend a cloud-hosted platform for Investment Banking. The role emphasizes collaboration in a high-caliber engineering team and follows Extreme Programming practices. The ideal candidate will have strong experience in Kotlin ...