176 to 200 of 201 API Design Jobs in the UK

problems end to end. You will bring strong JavaScript/TypeScript experience across frontend and backend development, alongside a clear understanding of API design and relational databases. You have mentored engineers and may already have line management experience, conducting development and performance conversations with maturity and clarity. ...

part of a small, highly experienced engineering team responsible for transforming ambitious ideas into production-ready software. Working closely with Product, Design and AI specialists, you'll take concepts from whiteboard sketches through to prototypes, proof of concepts, MVPs and ultimately scalable products. If you enjoy solving complex problems … frontend development, backend engineering and cloud technologies to rapidly build and validate new AI-powered products. You'll be heavily involved in architecture, technical design and proof-of-concept development, collaborating directly with stakeholders to transform ideas into working software. This is a hands-on engineering role where ...

opportunity to take ownership of technical solutions, work across the full delivery lifecycle and contribute to projects with real-world impact. Key Responsibilities Design, develop and maintain cloud-based applications and services using AWS. Configure and manage AWS infrastructure to deliver secure, scalable and reliable solutions. Apply infrastructure … languages. Work with AWS services to support compute, storage, networking, security and application integration. Contribute to the full software delivery lifecycle, from requirements and design through to deployment and ongoing support. Apply DevOps principles to automate deployments, improve reliability and streamline engineering workflows. Collaborate with technical colleagues and stakeholders ...

part of a small, highly experienced engineering team responsible for transforming ambitious ideas into production-ready software. Working closely with Product, Design and AI specialists, you’ll take concepts from whiteboard sketches through to prototypes, proof of concepts, MVPs and ultimately scalable products. If you enjoy solving complex problems … frontend development, backend engineering and cloud technologies to rapidly build and validate new AI-powered products. You’ll be heavily involved in architecture, technical design and proof-of-concept development, collaborating directly with stakeholders to transform ideas into working software. This is a hands-on engineering role where ...

suitable programming languages.Work with AWS services to support compute, storage, networking, security and application integration.Contribute to the full software delivery lifecycle, from requirements and design through to deployment and ongoing support.Apply DevOps principles to automate deployments, improve reliability and streamline engineering workflows.Collaborate with technical colleagues and stakeholders to understand … cost management.Work within Agile teams, sharing knowledge and contributing to continuous improvement.Essential Skills and ExperienceStrong practical experience with AWS, with the ability to design and implement cloud solutions confidently.Experience with AWS services such as EC2, ECS, EKS, S3, Lambda, RDS, KMS, Elastic Load Balancing, SNS, SQS and IAM.Scripting experience ...

/AWS Developer to join a specialist engineering team delivering secure, mission-critical technology for UK National Security customers.The role offers the chance to design, develop, deploy and maintain cloud-native applications and services on Amazon Web Services (AWS), supporting systems that contribute to the UK's national security … secure, scalable and resilient cloud solutions that support critical National Security customer requirements.Work across the full software delivery lifecycle, from requirements gathering and solution design through development, testing, deployment and ongoing maintenance.Collaborate with end-users and technical stakeholders to understand complex problems and translate business needs into effective engineering ...

experience, and performance, reliability, and user trust are critical. FocusBuild and maintain iOS applications using Swift and SwiftUI.Integrate AI-powered features through backend APIs. Design UX patterns for AI interactions, including loading states, streaming responses, retries, and fallbacks. Optimize performance, memory usage, and battery efficiency. Capture user signals … feedback to support AI evaluation and iteration. Collaborate closely with backend and ML engineers on API design and system behavior. Maintain high App Store quality, stability, and production reliability. Ideal Experiences3+ years of iOS development experience using Swift. Hands-on experience integrating AI-powered features into mobile apps. ...

partners across product, legal, policy, and design. What We're Looking For 8+ years of professional iOS development experience with modern Swift and Cocoa design patterns. Agentic workflow adoption: Hands-on experience integrating tools like Cursor and Claude into daily engineering. Platform & API design: Proven track record ...

fallbacks.Optimize performance, memory usage, and battery efficiency.Capture user signals and feedback to support AI evaluation and iteration.Collaborate closely with backend and ML engineers on API design and system behavior.Maintain high App Store quality, stability, and production reliability. Ideal Experiences3+ years of iOS development experience using Swift.Hands-on experience ...

passionate about.The Junior Java Scala developer will be involved in:Web application greenfield developmentWeb analytics & business intelligenceMachine learning, risk modelling, fraud detection.API design and provisionIntegration patterns & messagingHybrid cloud infrastructureJavaScript application developmentWeb application performanceScalabilityExceptional knowledge of low-high level systems coupled with true programming ability.Junior Java Scala Developers MUST have ...

looking for an experienced Cloud Engineer with strong AWS expertise to design, develop, deploy and maintain cloud-based applications and services. You will work as part of an autonomous DevOps team, collaborating with software engineers, technical specialists and client stakeholders to deliver secure, scalable and reliable cloud solutions. … enjoys problem-solving, embraces new technologies and wants to take ownership of delivering high-quality cloud solutions within a collaborative engineering environment. Key Responsibilities Design, develop and maintain applications and services hosted on Amazon Web Services (AWS). Work across the full software development lifecycle, including requirements gathering, solution ...

working with modern cloud technologies, and contributing throughout the full software delivery lifecycle. The successful candidate will work within an autonomous DevOps team, helping design, develop, deploy, and maintain cloud applications and services that support critical operational requirements. They'll have the opportunity to influence technical decisions, explore … . They'll be part of a collaborative engineering environment that encourages innovation, continuous improvement, and the adoption of modern DevOps practices. Key Responsibilities Design, develop, deploy, and maintain cloud-based applications and services using AWS. Build and manage cloud infrastructure using Infrastructure as Code (IaC) tools. Identify appropriate ...

experienced Cloud Engineer to join a specialist engineering team delivering secure, mission-critical technology for UK National Security customers.The role offers the chance to design, develop, deploy and maintain cloud-native applications and services on Amazon Web Services (AWS), supporting systems that contribute to the UK's national security … secure, scalable and resilient cloud solutions that support critical National Security customer requirements.Work across the full software delivery lifecycle, from requirements gathering and solution design through development, testing, deployment and ongoing maintenance.Collaborate with end-users and technical stakeholders to understand complex problems and translate business needs into effective engineering ...

data platform. Define and drive the architecture and strategy to support the future needs of Operations and the business. Provide technical leadership through architecture, design, code reviews, and pull request reviews, championing high standards of code quality and engineering excellence. Mentor engineers and drive continuous improvement in platform capabilities … Experience building and supporting reactive, event-sourced systems. Hands-on experience with Apache Spark and Apache Flink. Strong understanding of Apache Envoy, and REST API design. Experience working with Protobuf, Avro, and Parquet data formats. Knowledge of Iceberg, Databricks, and Hadoop ecosystems. Skills that will help: Follows TDD, ATDD ...

interfaces, and an artificial intelligence gateway.You'll join a small, distributed team working on one of GitLab's highest-visibility product bets, collaborating with design partners toward a public beta. In your first year, you'll lead major features from an unclear problem through release, help shape scope with … mentor other engineers, and influence technical decisions across agent workflows and evaluation methods.What you’ll doLead backend features from early product discussions through technical design, implementation, rollout, and post-launch learning.Build the flows, application programming interfaces, and data models behind agent-generated work items, implementation plans, durable specifications ...

resolve defects, ensuring the reliability and stability of the company's platforms aligning with the broader Technology Strategy. Day-to-day of the role: Design, build, test, and ship features across .NET/C# backend and Angular frontend applications. Write clean, well-tested, maintainable code and uphold those standards … administration tasks including deployments, patching, and environment configuration to reduce manual effort and risk. Contribute to architectural decisions, providing input on technology choices, system design, and platform adoption. Use Infrastructure as Code (IaC) to manage and provision Azure resources, ensuring environments are reproducible, auditable, and consistent. Build and maintain ...

Back EndHybrid – 2 days per week in the officeJava, PostgreSQL, APIWe are looking for an experienced Back End Developer with excellent Java, PostgreSQL and API skills due to software development moving from an outsourced model to in-house.Working alongside the development team you will:Be highly involved with knowledge … deployment configuration.Design and implement new back-end features, enhancements, and bug fixes in Java, following agreed coding standards and architectural principles.PostgreSQL data model – schema design, migration management (Flyway/Liquibase), indexing strategy, and query optimisation.Design, document, and maintain RESTful and/or GraphQL APIs, ensuring consistency, versioning, and thorough ...

Software Architect – Retail Wealth Management100,000 Plus Bonus and Bens 10% PensionQuant Capital is urgently looking for a Technical Architect with REST API Experience to join or well known Fintech client who are a well know wealth management software business. We are looking for a technically strong architect … help to design and grow a SaaS platform. The company has bold global ambitions. They have a comprehensive microservices architecture in backend and are looking to extend the pattern into an ambitious micro-frontend strategy for user-facing applications. This is a leadership position. You will be joining ...

regions with a wide range of strategies. As a Senior Software Engineer, you will work closely with a talented team of engineers to collaboratively design and develop robust software solutions essential for facilitating global trading operations. This includes systems such as trading systems, exchange connectivity solutions, monitoring systems … experience in C++ , Rust, Java and PythonDemonstrated expertise in network communication, including multicast and WebSockets. Proficiency in inter-process messaging, micro-service architectures, and API design. Familiarity with Functional Programming and Immutable Design. Experience with trading systems is desirableExcellent oral and written communication skills. Bachelor's degree in Computer ...

clean, electrified future. Our platform orchestrates millions of real-time decisions across homes, devices, markets and grids. By combining predictive algorithms with human-centred design, Kaluza makes clean energy dependable, affordable and adaptive to everyday life. With teams across Europe, Asia and Australia, and a joint venture with Mitsubishi … work; you'll not be expected to write code day-to-day. But for some challenges, you may need to dive into code-level design or help build a proof-of-concept. What you'll bring Ideally, you'll have: Architect modern distributed, cloud-based systems applying modern architecture ...

regions with a wide range of strategies. As a Senior Software Engineer, you will work closely with a talented team of engineers to collaboratively design and develop robust software solutions essential for facilitating global trading operations. This includes systems such as trading systems, exchange connectivity solutions, monitoring systems … Python (5+ years), Java and or C++Demonstrated expertise in network communication, including multicast and WebSockets. Proficiency in inter-process messaging, micro-service architectures, and API design. Familiarity with Functional Programming and Immutable Design. Experience with trading systems is desirable, but not required. Excellent oral and written communication skills. Bachelor ...

regions with a wide range of strategies. As a Senior Software Engineer, you will work closely with a talented team of engineers to collaboratively design and develop robust software solutions essential for facilitating global trading operations. This includes systems such as trading systems, exchange connectivity solutions, monitoring systems … experience in C++ , Rust, Java and PythonDemonstrated expertise in network communication, including multicast and WebSockets. Proficiency in inter-process messaging, micro-service architectures, and API design. Familiarity with Functional Programming and Immutable Design. Experience with trading systems is desirableExcellent oral and written communication skills. Bachelor's degree in Computer ...

regions with a wide range of strategies. As a Senior Software Engineer, you will work closely with a talented team of engineers to collaboratively design and develop robust software solutions essential for facilitating global trading operations. This includes systems such as trading systems, exchange connectivity solutions, monitoring systems … Python (5+ years), Java and or C++Demonstrated expertise in network communication, including multicast and WebSockets. Proficiency in inter-process messaging, micro-service architectures, and API design. Familiarity with Functional Programming and Immutable Design. Experience with trading systems is desirable, but not required. Excellent oral and written communication skills. Bachelor ...

most difficult code across multiple system components, driving high coding standards and improving development practices.Demonstrated experience driving complex designs, high-quality interface/API designs, and overall architecture improvements across multiple teams and services, leading design reviews and ensuring consistent architecture.Track record of driving product/service design ...

broader UE engineering organizationWhat we're looking forExpert knowledge of C++17 or laterExperience in compiler or toolchain development (e.g., compiler internals, VM design, Clang/LLVM, or linker/platform ABI specifics)Experience developing and optimizing large codebases, with the ability to make tradeoffs between usability, performance, and powerStrong … ability to reason about large, interconnected systemsSolid grounding in software engineering principles, including API designStrong communication and collaboration skills, with the ability to work autonomously and deliver practical solutionsExperience with Unreal Engine integration is a plusEPIC JOB + EPIC BENEFITS = EPIC LIFEOur intent is to cover all things that ...