101 to 125 of 283 API Design Jobs

Senior Product Engineer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
contexts Use customer feedback, analytics, and direct user insights to inform technical decisions, prioritise improvements, and validate that shipped features deliver measurable value Design and implement complex data flows, API integrations, and background processing systems that handle high-volume operations reliably while maintaining system performance and data integrity … Partner with product, design, and customers to shape solutions early, translating business requirements into technical architecture while surfacing risks and opportunities that impact customer outcomes Mentor and coach other engineers, raising the bar for technical excellence through code reviews, pair programming, and architectural guidance Beyond the tech ...

Senior/Staff Software Engineer, AI

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
focus on solving real customer problems , not just shipping features. We work in small, high-trust teams , with full ownership across the lifecycle, from design to production and beyond. We value: Ownership – engineers own what they build end-to-end Simplicity – we break down complex problems into clear solutions … interfaces, and agent-driven experiences that make complex problems simpler for our users and internal teams. You’ll work closely with engineering, product, and design to prototype, iterate, and scale new AI capabilities across the platform. This includes everything from designing backend systems that power AI workflows to shaping ...

Solution Architect

Hiring Organisation
Yorkshire Water
Location
Bradford, West Yorkshire, Yorkshire, United Kingdom
Employment Type
Permanent, Work From Home
that drive business transformation. Working closely with stakeholders, engineering teams and platform specialists, you'll translate complex business needs into innovative technical solutions, championing API-led and event-driven architecture principles. You'll also help drive the adoption of emerging AI capabilities, ensuring AI-powered solutions are implemented … will: Partner with business stakeholders, solution architects and delivery teams to understand business needs and translate them into innovative, future-ready solution designs. Design, shape and govern scalable, secure and highly available solutions using Microsoft Azure technologies, ensuring they meet both current and future business demands. Drive the adoption ...

Senior Full Stack Java Developer

Hiring Organisation
Hackajob Ltd
Location
South West London, London, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£85,000
security etc). Working within a project management/agile delivery methodology Experience in technical ownership for a product or software solution, covering design, estimation, shaping and user story/requirement creation Documentation of solutions (e.g. architecture, configuration, release, support-handover Collaborate and liaise with other Version … including microservices and message-driven architectures NFR/Non-Functional requirement understanding and experience developing applications with this in mind Application/Digital Services Design experience Experience in software engineering practices like Code Reviews, CI/CD Pipelines and SOLID/DRY principals Hands-on developing/coding role ...

Integration Architect - SAP SAAS Products

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
patterns, govern APIs/events, ensure secure, resilient data flows, and drive standardization, observability, and compliance. Core Responsibilities Architecture & Standards • Define canonical integration patterns (API-led, event-driven, batch/EDI) and reference architectures on SAP BTP. • Establish guidelines for API design, versioning, reusability, and governance. • Create … integration roadmaps aligned with product releases and enterprise architecture. Integration Delivery • Lead solution design using SAP Integration Suite (Cloud Integration/CPI, API Management, Event Mesh). • Orchestrate end-to-end flows for master data, transactional data, and identity across SAP and non-SAP systems. • Govern mapping, transformation ...

Software Engineer III (UI) - Digital Markets Execution Technology (DMET), Execute

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
Software Engineer III at JPMorganChase, you serve as a seasoned member of an agile team to design and deliver trusted market-leading technology products in a secure, stable, and scalable way. You are responsible for carrying out critical technology solutions across multiple technical areas within various business functions … Your success will be measured by resiliency, usability, and speed of delivery in a highly operational, business‐critical environment. Job Responsibilities Executes software solutions, design, development, and technical troubleshooting with ability to think beyond routine or conventional approaches to build solutions or breakdown technical problems Creates secure and high ...

Software Engineer III (UI) - Digital Markets Execution Technology (DMET), Execute

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
DESCRIPTION As a Software Engineer III at the company, you serve as a seasoned member of an agile team to design and deliver trusted market-leading technology products in a secure, stable, and scalable way. You are responsible for carrying out critical technology solutions across multiple technical areas within … Your success will be measured by resiliency, usability, and speed of delivery in a highly operational, business-critical environment. Job Responsibilities Executes software solutions, design, development, and technical troubleshooting with ability to think beyond routine or conventional approaches to build solutions or breakdown technical problems Creates secure and high ...

Lead Web Developer

Hiring Organisation
Avanti Recruitment
Location
Aberdeen, Aberdeen City, City of Aberdeen, United Kingdom
Employment Type
Permanent
Salary
£65000 - £75000/annum
help define technical direction, improve engineering standards and support the continued evolution of a modern cloud-based software platform. Key Responsibilities Lead the design and architecture of scalable web applications Build modern applications using React and/or Angular Develop backend services using Node.js or similar technologies Design … Angular expertise Good backend development experience with Node.js or similar Experience building scalable enterprise applications Knowledge of distributed systems and microservices Experience with API design and integration Exposure to Kafka, RabbitMQ or similar messaging technologies Cloud experience with Azure, AWS or similar CI/CD and Agile development ...

Senior Solutions Engineer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
team works with top tier global financial institutions and major tech companies to offer Wise products and services directly to their customers. Through our API, we help partners to architect and build integrations to our world class-leading international finance products, which in turn improves Wise Platform by increasing … improve turnaround times. Designing and developing innovative new features that expand the functionality of Wise's services and exposing these features through the public API, enabling seamless integration with partner systems and empowering them to leverage the full potential of Wise's platform. Diagnosing and resolving complex technical issues ...

Engineering Lead, Scale

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
foundational systems that power our embedded finance platform at global scale. The team owns multi‐tenant infrastructure, drives cross‐domain product capabilities, and helps design technical solutions for enterprise customers. Key areas of ownership include: Embedded Finance Platform: Build and maintain the infrastructure powering customers like Rippling, Navan, Qantas … career development. Set technical direction for scalable, reliable backend systems and partner with senior engineers on architecture and design. Ensure high standards for system design, code quality, testing, and operational excellence. Drive improvements across reliability, observability, security, and developer productivity. Work cross‐functionally with product, design, compliance, sales ...

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 ...

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 ...

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
organisation The Experience and Key Skills you will have: 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-native ...

AI engineer with Agentic experience

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
basis with development team, designers, copy writers and other IT teams.- The role develops and presents recommendations from analysis of current solution. Assist in design peer reviews, code peer reviews, build and unit test functional enhancements. Identify areas for code refactoring. Review and contribute to development process and procedures … Defends a recommendation and can confidently support it.- Strong organization, communication, and interpersonal skills. Ability to communicate with business and technical audiences and produce design documents suitable for multiple audience types, both client-facing and internal- Must be able to exhibit technical thought leadership and excellent problem solving ability ...

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 ...

Corporate KYC : Lead Software Engineer- Python/ PySpark

Hiring Organisation
Jobleads-UK
Location
Glasgow, Scotland, United Kingdom
software development and data engineering Support a culture of innovation, inclusion, and continuous improvement Required qualifications, capabilities, and skills Hands-on experience delivering system design, application development, testing, and operational stability at enterprise scale Expertise in Python and/or PySpark Advanced knowledge of software application development and technical … processes, with depth in disciplines such as cloud, AI/ML, or data engineering Experience in large-scale data processing, microservices, API design, Kafka, Redis, MemCached, observability tools (Dynatrace, Splunk, Grafana), and orchestration frameworks (Airflow, Temporal) Advanced working knowledge of relational and NoSQL databases, vector stores, data lake ...

Frontend Software Engineer

Hiring Organisation
Jobleads-UK
Location
Greater London, England, United Kingdom
capabilities, improving the foundations of the product, and helping define how users interact with complex energy system models. You will work closely with product, design, backend engineers, AI engineers, and energy specialists to build intuitive experiences over large datasets and complex modelling workflows. From data-heavy interfaces and interactive … make a visible impact in a small team. Responsibilities Frontend Development Deliver frontend features from implementation through to release, working closely with product and design to build high-quality user experiences. Build and deliver frontend capabilities for Scenario Builder using React and TypeScript. Implement complex UI patterns including data ...

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 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 ...