101 to 125 of 262 API Design Jobs

Senior Delivery Consultant - Modernisation, Professional Services (AWS)

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
skilled Sr. Delivery Consultant to join our team at Amazon Web Services (AWS). In this role, you will work closely with customers to design, implement, and manage AWS solutions that meet their technical requirements and business objectives. You will be a key player in driving customer success throughout … here: https://www.gov.uk/government/publications/united-kingdom-security-vetting-clearance-levels Basic Qualifications Experience as a technical specialist in design and architecture. Experience in cloud-based solution (AWS or equivalent), system, network, and operating system. Experience in external or internal customer-facing, complex ...

Senior AI Engineer

Hiring Organisation
Jobleads-UK
Location
City of Edinburgh, Scotland, United Kingdom
Consultant) to join our Technology Delivery team. In this role, you’ll combine deep expertise in AI/ML engineering and software development to design, build, and deploy advanced generative AI and agentic systems for leading financial services clients. You’ll work hands‐on across the full AI engineering … client expectations. What You’ll Do Architect and develop autonomous AI systems leveraging multi‐modal large language models across text, image, audio, and video Design and implement agentic workflows using prompt engineering, Retrieval‐Augmented Generation (RAG), APIs, and enterprise data integrations Fine‐tune, optimize, and deploy large language ...

Java Engineer

Hiring Organisation
Response Informatics
Location
Belfast, County Antrim, Northern Ireland, United Kingdom
Employment Type
Contract
Contract Rate
From £250 to £300 per day
management, observability, and resilience patterns. Experience delivering production services deployed on Kubernetes. Experience building highly available, scalable, and reliable distributed systems. Strong knowledge of API design principles, including REST, gRPC, versioning, authentication, authorization, error handling, and backward compatibility. Experience with microservices architectures and the operational challenges of running … understanding of Linux, containers, networking fundamentals, and cloud infrastructure concepts. Experience with production monitoring, logging, tracing, alerting, and incident response. Ability to lead technical design discussions, make pragmatic architecture decisions, and mentor other engineers. Strong ownership mindset with a focus on reliability, maintainability, and operational excellence. Nice to Have ...

Product Engineer (Internal tools & apps)

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Slack and React: the agents people talk to and the apps they click through, built in TypeScript. And you don't stop there. From API and MCP design to infrastructure on Vercel, AWS, Supabase, and BigQuery, plus the agents that work across the stack, you own complete features … software factory. What you'll bring 5+ years of experience building applications or tooling that automate human workflows Full-stack experience across the board: API design, databases, async workflows and background jobs on the backend, and clean, user-friendly UX on the frontend. Being AI-native. An early ...

Dell Boomi Integration Consultant

Hiring Organisation
Oscar Associates (UK) Limited
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
£500 - £550 per day
Boomi AtomSphere, connecting multiple enterprise platforms across cloud and on-premise environments. This is a hands-on technical position requiring strong Boomi development experience, API integration knowledge and the ability to support complex integration landscapes. Key Responsibilities: Design and develop scalable integration solutions using Dell Boomi AtomSphere, including … secure Managed File Transfer (MFT) workflows to support high-volume and sensitive data transfers Publish, secure and govern REST/SOAP APIs through Boomi API Management, including gateway configuration, throttling and developer portal management Develop and maintain CI/CD pipelines using Git, Azure DevOps or Jenkins, supporting automated ...

GenAI Full-Stack Engineer Lead

Hiring Organisation
Jobleads-UK
Location
Belfast City District, Northern Ireland, United Kingdom
organisation to build scalable developer platforms, influence engineering strategy and drive the adoption of Generative AI and modern engineering practices. Key Responsibilities Drive the design and delivery of enterprise-scale applications supporting critical business functions and large user populations. Remain hands-on with software architecture, system design, code … containers, microservices and event-driven architectures. Strong understanding of distributed systems, resiliency patterns, scalability and performance engineering. Strong knowledge of SQL and NoSQL technologies, API design and integration patterns. Excellent communication and stakeholder management skills with the ability to influence technology decisions across numerous teams and organisations. Growth ...

Lead UI Developer – Single Dealer Platform (TypeScript / RxJS / React)

Hiring Organisation
Jobleads-UK
Location
Bromley, England, United Kingdom
shape requirements into pragmatic, iterative delivery plans. Own the front end architecture (React + TypeScript + RxJS), including state management, observables, and data flow design for live market data (WebSockets/Server Sent Events). Design and implement modular, testable, and reusable components and design system primitives … senior/lead role. WebSockets, Server-Sent Events, WebRTC or other high performance bidirectional data streaming experience. GraphQL, Protobuf, Flatbuffers or other schema-driven API design tools. Strong RxJS (or equivalent observables experience) and reactive architecture in production systems. Proven experience with real time UIs (market data streams ...

Context Plane Python Engineer

Hiring Organisation
Jobleads-UK
Location
Glasgow, Scotland, United Kingdom
hands-on senior role with real architectural scope, active cross-functional collaboration, and strong support for internal mobility and upskilling. Job responsibilities Design, build, and maintain backend services and data pipelines in Python that load firm knowledge into a knowledge graph and vector store Build and evolve the serving … firm, including enterprise AI and large language model gateways Own quality across your components: automated testing, code reviews, observability, and resilient, secure service design Partner with Corporate Technology AI, product, and data science colleagues to translate concrete use cases into working, measurable capabilities Contribute to design discussions ...

VP of Enterprise Architecture

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
strengthen technical capability and architectural thinking across the organisation Skills We're interested in hearing from technology leaders with strong experience in: Application architecture: API design (REST, GraphQL), microservices, event-driven and distributed systems Data streaming and processing: platforms like Kafka for real-time data pipelines and integration … Enterprise architecture: domain-driven design, architecture governance, reusable components and patterns AI for software engineering: leveraging AI/agentic tools for coding assistance, pipeline automation, testing, and developer productivity improvements Engineering lifecycle: CI/CD pipelines, automated testing, product lifecycle management, Agile and DevOps practices Strong understanding of cloud ...

Senior Software Engineer – Order Management Platform

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Design, build, and evolve order management capabilities that support seamless customer fulfilment journeys across checkout, fulfilment, returns, amendments, and cancellations. Own features end-to-end, taking responsibility for solution design, development, testing, deployment, and production support. Help shape the technical direction of the Order Management platform, driving improvements … Management Java Development CI/CD Practices Observability and Monitoring System Resilience and Supportability ATS Optimization Keywords Hard Skills Backend Engineering Enterprise Services Development API Design Distributed Systems Integration Solution Design Testing and Deployment Production Support Soft Skills Collaboration Continuous Improvement Problem Solving Industry Keywords Ecommerce Fulfilment ...

Senior C# Engineer .NET 9, AWS Lambda, SQS, SNS Outside IR35

Hiring Organisation
Smart Sourcer Limited
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
From £700 to £800 per day
Overview: Youll operate as the technical spearhead for a greenfield product build, reporting to the Director of Engineering. Expect deep backend engineering, distributed system design, and high-quality serverless delivery, plus the chance to adopt modern AI-assisted development practices as part of your workflow. What Youll Bring: Senior … ability to architect and lead distributed REST microservices at scale. Strong authority in AWS serverless engineering: Lambda-first mindset, hands-on experience with API Gateway, SQS, Step Functions, EventBridge and IAM. Deep data expertise across Aurora MySQL and DynamoDB: schema design, access patterns, indexing, query tuning, and pragmatic ...

Full Stack / Data Engineer · London ·

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
titles. Key Responsibilities End‐to‐End Development: Build and maintain cloud‐native applications and services using C#, .NET, and Azure. Data Architecture & Fabric: Design, implement, and maintain Microsoft Fabric environments; establish Medallion (Bronze/Silver/Gold) data architecture for both internal analytics and external self‐serve. Site Reliability … concept to production. Continuous Improvement: Contribute to technical standards, documentation, and architecture evolution. Skills & Experience Must‐Have Strong background in C#/.NET development (API design, backend systems). Hands‐on experience with Azure services (App Services, Functions, Storage, Service Bus, DevOps). Strong understanding of data architecture ...

Senior Full Stack Engineer

Hiring Organisation
Jobleads-UK
Location
Leeds, England, United Kingdom
make a difference You’ll take technical ownership of customer-facing solutions, working across React/TypeScript and .NET/C# to design, build, test and run reliable, secure and scalable services. You’ll lead complex technical delivery, champion modern engineering practices and help shape high-quality solutions through … testing. CI/CD craftsmanship (Azure DevOps/GitHub Actions or similar) with quality gates and environment parity. Proven record designing scalable, resilient systems; API design/versioning; clean architecture and DDD experience. Track record mentoring engineers and leading code/design reviews; uplifting test automation ...

Senior Lead Software Engineer - Java / Python - Risk Technology Data Strategy

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
continuous improvement. As a Senior Lead Software Engineer at JPMorgan Chase within the Data Platform & Strategy team within Corporate Risk Technology, you will design, build, and enhance advanced data engineering solutions. You will play a pivotal role in delivering secure, stable, and scalable technology products that support our business … multiple technical areas. Your work will help shape the team culture and the impact of our technology solutions. Job Responsibilities: Execute creative software solutions, design, development, and technical troubleshooting to solve complex problems Develop secure, high‐quality production code for data‐intensive applications and review code written by others ...

Senior Lead Software Engineer - Java / Python - Risk Technology Data Strategy

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
continuous improvement. As a Senior Lead Software Engineer at JPMorgan Chase within the Data Platform & Strategy team within Corporate Risk Technology, you will design, build, and enhance advanced data engineering solutions. You will play a pivotal role in delivering secure, stable, and scalable technology products that support our business … multiple technical areas. Your work will help shape the team culture and the impact of our technology solutions. Job Responsibilities Execute creative software solutions, design, development, and technical troubleshooting to solve complex problems Develop secure, high-quality production code for data-intensive applications and review code written by others ...

AI Native Engineer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
centres already operating at 100% whole slide image scanning capacity in Geneva and Lausanne. Core Responsibilities Core Agentic Architecture & Retrospective Extraction LLM Extraction Agents: Design, build, and maintain production-grade LLM-based extraction pipelines to automatically parse years of unstructured PDF pathology reports. Structured Parsing: Programmatically extract clinical entities … biomarker statuses from raw, free-text documents. Framework Selection: Evaluate and integrate specialized agentic frameworks and orchestration tooling (e.g., LangChain, LlamaIndex, or direct LLM API implementations) based on measurable extraction accuracy against real-world clinical text, rather than what is fashionable. Confidence Scoring & Human-Review Loops: Build programmatic confidence ...

Lead Software Engineering - Java/Python - Risk Data Platform & Strategy

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
creativity and continuous improvement. As a Lead Software Engineer at JPMorgan Chase within the Data Platform & Strategy team within Corporate Risk Technology, you will design, build, and enhance advanced data engineering solutions. You will play a pivotal role in delivering secure, stable, and scalable technology products that support … multiple technical areas. Your work will help shape the team culture and the impact of our technology solutions. Job Responsibilities Execute creative software solutions, design, development, and technical troubleshooting to solve complex problems Develop secure, high-quality production code for data-intensive applications and review code written by others ...

Principal Software Engineering (Azure and Integration)

Hiring Organisation
Jobleads-UK
Location
Windsor, England, United Kingdom
product suites. Translate business and technical requirements into scalable, resilient and cost‐effective solutions, ensuring alignment with wider enterprise architecture. Provide technical leadership through design reviews, code reviews and architectural governance, supporting high‐quality, secure and maintainable software delivery. Lead the evolution and adoption of engineering practices, principles … designing scalable, resilient and secure technical architectures, with the ability to produce both high‐level and detailed solution designs. Extensive knowledge of integration and API design patterns, including REST APIs, event‐driven architectures, messaging, microservices and orchestration. Expert understanding of modern software engineering principles and architecture patterns, including ...

UI Senior Lead Software Engineer - Commodities

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
inclusive team culture. This role emphasizes engineering excellence, operational readiness, and secure, compliant delivery in a fast‐paced global environment. Job Responsibilities Lead the design and delivery of user interface capabilities across Execute, from discovery to production support Set front‐end technical direction, including architecture, standards, performance, and testing … leadership in setting standards, leading designs, and directly managing or mentoring small teams of mid‐level engineers Solid software engineering fundamentals, including OO/design patterns, debugging, and documentation Familiarity with agentic development approaches across the software development lifecycle Strong communication and people skills, with the ability to work ...

UI Senior Lead Software Engineer - Commodities

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
inclusive team culture. This role emphasizes engineering excellence, operational readiness, and secure, compliant delivery in a fast-paced global environment. Job Responsibilities Lead the design and delivery of user interface capabilities across Execute, from discovery to production support Set front-end technical direction, including architecture, standards, performance, and testing … leadership in setting standards, leading designs, and directly managing or mentoring small teams of mid-level engineers Solid software engineering fundamentals, including OO/design patterns, debugging, and documentation Familiarity with agentic development approaches across the software development lifecycle Strong communication and people skills, with the ability to work ...

Senior Software Engineer

Hiring Organisation
Stratospherec Ltd
Location
Leamington Spa, Warwickshire, United Kingdom
Employment Type
Permanent
Salary
GBP 60,000 - 65,000 Annual
advantageous Prior senior level/architecture experience Good communication skills Used to working in an agile environment Desirable Skills Blazor (or happy to learn) API design experience (preferably .NET Web API) Elastic Search (with Kibana dashboards) Experience working with third-party API s JIRA/Agile ...

Solutions Architect

Hiring Organisation
Reed Technology
Location
Bristol, Avon, South West, United Kingdom
Employment Type
Permanent
Salary
£70,000
early-stage architecture definition, ensuring business and technical requirements are appropriately translated into solution designs. Support impact assessments, architectural governance activities, and Technical Design Authority (TDA) submissions. Design and assure solutions spanning Internet of Things (IoT), Access Control, Building Management Systems (BMS), Building Information Modelling (BIM), asset data … enterprise IT infrastructure. Define integration approaches, API strategies, and data flows across digital platforms and operational technologies. Engage with internal teams and third-party suppliers, facilitating technical reviews and evaluating architectural options to support informed decision-making. Required Skills & Qualifications: Broad understanding of IoT, enterprise data, BIM, system integration ...

Senior Software Engineer – Price Domain

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Design, build, and evolve backend services that power pricing and promotions across multiple customer channels. Develop scalable microservices and APIs using Java/Kotlin for reliable pricing calculations and promotions management. Contribute to Kafka-based event-driven architectures for high-volume price publishing and promotional capabilities. Design … Build resilient, low-latency solutions using MongoDB, Redis, PostgreSQL, and distributed data architectures. Own complex backend features across the pricing and promotions lifecycle from design through deployment and operational support. Requirements Strong backend engineer with significant experience designing and operating scalable services in production environments. Working knowledge of Java ...

Senior Software Engineer

Hiring Organisation
Jobleads-UK
Location
Wimbledon, England, United Kingdom
Responsibilities Contribute across the full SDLC, partnering with Engineering, DevOps, and Product Turn business requirements into robust, secure technical solutions Design and build scalable, high-performing applications and services Write high-quality, maintainable code with strong testing and automation Lead investigations into complex technical issues and ensure system stability … Champion engineering best practices and continuous improvement Shape system and API design using modern architectural principles Communicate clearly with cross-functional teams Mentor junior engineers and support knowledge-sharing Contribute to technical discovery (spikes) and document findings Support CI/CD, IaC, and cloud environments (GitHub Actions, Terraform ...

Software Engineer, Scale

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
regulatory, and technical domains—areas where no single existing team has full coverage, like tax systems, compliance‐driven flows, or monetization tools. Solutions Architecture: Design integrations for enterprise prospects by translating their business requirements into technical solutions. Your architectural decisions directly influence deal outcomes—from enabling multi‐million dollar … technical stakeholders. Make pragmatic decisions on when to optimize for performance vs. velocity based on business impact. Thrive in cross‐functional environments spanning Product, Design, Compliance, and Sales. Design for scale, maintainability, and production excellence. Bonus if you have Fintech, payments, or regulated industry experience. High‐scale performance ...