351 to 375 of 509 Permanent API Design Jobs

Senior Software Engineer

Location
Newcastle upon Tyne, England, United Kingdom
future of technology and be at the forefront of innovation? Join our dynamic team as a Full Stack Software Engineer, where you’ll design, develop, and maintain scalable software solutions in a collaborative and creative environment. This is your chance to work with cutting-edge technology, grow your skills … solutions. Technical Skills Strong understanding of Microsoft Azure services for cloud-based development. Knowledge of web security, RESTful Web Services and RESTful architecture and API design principles. Experience with modern unit testing frameworks and methodologies. Deep knowledge of software engineering concepts such as design patterns, SOLID principles ...

Principal Solutions Architect, Technology Sales Lead (AWS)

Location
Greater London, England, United Kingdom
technical win strategy, lead client‐facing deep-dives alongside AWS SAs, and remove the objections that decide competitive deals. Reference architectures that become standards: design the architectures that anchor our joint AWS solutions and get reused across pursuits. Contribute to AWS Partner Central and establish the patterns delivery teams … Amazon Marketing Cloud (AMC), AWS Clean Rooms, data lakes, analytics pipelines Customer Experience: Amazon Personalize, Amazon Connect, serverless architectures Modern Applications: Lambda, Step Functions, API Gateway, container orchestration Integration: Event-driven architectures, microservices, API design How Success Looks Technical win rate on the strategic pursuits you lead ...

Senior Full-Stack Engineer, North Tools & Retrieval

Hiring Organisation
Cohere
Location
London, UK
Employment Type
Full-time
senior generalist who can move freely across backend and frontend as the roadmap demands. You will pick up any layer of a feature, from API design and database schema to the frontend that sits on top of it, and own it end-to-end. In this role … will: Design, build, ship, and maintain features across the full stack for our roadmap surfaces: large-scale file upload and management, shared knowledge bases, the agent extensibility framework (skills and integrations), and the pipeline that syncs external enterprise data into the platform. Own features end-to-end, from technical ...

Lead Software Engineer - Umbraco

Hiring Organisation
TPXImpact Holdings Plc
Location
United Kingdom
Employment Type
Permanent
Salary
£60,000
designing and implementing APIs and integrations within complex digital ecosystems, including CRM, payment and marketing platforms. Database and data management. Strong expertise in database design and efficient querying in the context of web applications. Cloud and deployment. Practical experience with cloud platforms and managed hosting, particularly Azure and Umbraco … .NET practice Umbraco Cloud, or equivalent managed hosting experience, including environment strategy and deployment workflow Major version upgrade planning and delivery on live platforms API design and consumption, REST and GraphQL, including third-party integrations SQL Server and efficient data querying in a web application context Modern front ...

Junior Software Developer

Location
Greater London, England, United Kingdom
frontend) and Node.js (backend). Build and integrate backend services and APIs using Python with a web framework (e.g. Django, Flask, or FastAPI). Design, query, and manage relational and NoSQL databases (PostgreSQL, SQL, MongoDB). Work on machine learning tasks including object detection, model training, and deployment. Deploy … detection, model training, and deployment (not just coursework or personal projects). Cloud: Basic working knowledge of AWS. Nice to have Exposure to REST API design and integration. Familiarity with version control (Git). Understanding of basic DevOps or CI/CD concepts. Role details Job title: Junior ...

AI Engineer

Hiring Organisation
Oscar Associates (UK) Limited
Location
London, United Kingdom
Employment Type
Permanent
Hybrid Build the AI systems our users actually experience. We're looking for a dynamic AI Engineer (5+ years) to design, build, and deploy autonomous, user-facing AI solutions - LLM-powered applications, agentic workflows, and intelligent systems that perform reliably at scale, not just in a demo. What … Degree in Computer Science (or equivalent) with strong AI/ML/NLP foundations Strong Python skills, familiarity with Java/Kotlin, and solid API design experience Hands-on experience with LangChain, LangGraph, and LLM APIs (OpenAI, Anthropic, etc.) Skilled in prompt engineering and orchestrating AI agents/ ...

Staff Product Manager, GTPN

Hiring Organisation
Airwallex
Location
London, UK
Employment Type
Full-time
Staff Product Manager, GTPN (Global Treasury & Payment Network), you will drive the strategy, roadmap, and execution for our customer-facing API platform, enabling global treasury and payment solutions at scale. You will work cross-functionally with engineering, sales, and leadership to deliver innovative, scalable, and secure API products … validate product features. Translate complex use cases into scalable, secure, and intuitive APIs in collaboration with engineering teams. Lead cross-functional teams—including engineering, design, sales, compliance, and data science—to deliver impactful solutions. Use data-driven methods to define and measure success metrics, prioritize requirements, and communicate plans ...

Mobile Engineer

Hiring Organisation
Teya Solutions
Location
London, UK
Employment Type
Full-time
business. Teya exists to change that. We're building a financial platform for local businesses across Europe - one built around simple tools, thoughtful design and real human support. Our Members rely on us to help them run their business with confidence, and that responsibility shapes the way we work. … merchants across Europe. Collaborate with cross-functional teams to align technical solutions with business objectives. Actively participate in critical project decisions, including architecture design, framework selection, and tool evaluation. Mentor and support team members, fostering a collaborative and growth-oriented environment. Continuously improve applications while applying automation best practices ...

AWS Development Team Leader

Location
Swindon, England, United Kingdom
minimum you’ll have: Development experience ideally in Python and/or Node.js Experience with AWS including AWS Connect, Lambda, S3 and DynamoDB REST API design and integration experience aligning to industry standards Experience working in agile, DevOps-driven teams Experience leading code reviews, design discussions ...

Mid-level Backend Engineer

Location
Greater London, England, United Kingdom
regulatory burdens. We serve Tier 1 banks across Europe, North America, and Asia. We are looking for a Mid‐level Backend Engineer to help design, build, and scale our regulatory reporting platform. You’ll own features end‐to‐end — collaborating directly with product to shape requirements, and with … week. Some travel may be required. Suade is an equal opportunity employer. All qualified applicants will receive consideration for employment without bias. Responsibilities Design, build, and ship features independently, from technical design through deployment Maintain and lead the improvement of existing features within the application Write efficient, well ...

Power Platform Architect

Location
Greater London, England, United Kingdom
applications. Define and maintain reference architectures, principles, standards and reusable patterns while managing security, data, accessibility, operational and lifecycle risks. Chair or lead proportionate design assurance, record significant decisions and ensure exceptions, risks, technical debt and dependencies have clear owners and treatment plans. Advise leaders on architectural options, benefits … coaching architects and enhancing architecture practices within multidisciplinary environments. Highest-signal resume keywords Technical Architecture Leadership Microsoft Power Platform Expertise Cloud-Based Application Ecosystem Design Architecture Governance and Risk Management Coaching and Professional Development ATS Optimization Keywords Hard Skills Technical Direction Setting Architecture Governance Cloud Architecture API Design ...

Senior Product Engineer (£80k-125k + Equity)

Location
Greater London, England, United Kingdom
lead frontend architecture in React and TypeScript, set the quality bar for components, state management, and performance. And you don't stop there. From API design to cloud infrastructure (AWS), you ship complete, polished features end to end, including AI-powered ones built on LLM APIs, prompt engineering ...

Engineering Team Lead - 12 month FTC

Location
Greater London, England, United Kingdom
than on a purely backend squad. Strong commercial C#/.NET experience, with a solid grasp of SOLID, event‐driven architecture and DDD RESTful API design and SQL skills Cloud‐native Azure development Enough frontend fluency to review React/TypeScript work, even if you're not hands ...

Senior Python Engineer: AI Agents & Forecasting

Location
Greater London, England, United Kingdom
LangChain or LangGraph (agent memory, tool calling, state management) Dagster in production (assets, sensors, partitions) or equivalent pipeline orchestration Strong backend fundamentals including API design, async programming, and database modelling You've built systems that had to work reliably at scale, not just pass a demo Experience 5+ ...

Staff Software Engineer (Provenance)

Location
United Kingdom
/CD approach, deploying multiple times per day, and we support a global set of customers who are engineers like us. Key Responsibilities Build: Design, implement, and ship the provenance ingestion service — capable of accepting provenance and attestation payloads from CI/CD systems, public registries, signed bundles … designing pipelines that handle varied, schema-evolving, high-volume payloads reliably and at scale — including robust error handling and observability. Data Modelling: Ability to design storage schemas that efficiently represent signed metadata envelopes, artefact graphs, and queryable relationships. API Design: Experience building and versioning APIs consumed ...

Scala Engineer

Location
City Of London, England, United Kingdom
Responsibilities Help define and deliver the future vision for attribute reputation services, driving simplification and consolidation where appropriate. Design and develop high-volume, high-availability, low-latency backend services. Enhance and optimise existing applications and services. Support incremental re-architecting initiatives to reduce technical complexity and improve maintainability. Develop … clean, testable and maintainable code using Scala and modern engineering practices. Design, build and maintain secure APIs, databases and applications. Collaborate with Product Owners, Business Analysts, Data Engineers and wider technical teams to deliver effective software solutions. Contribute to service support and operational excellence within a "build ...

Hybrid Senior Backend Engineer - Golang & AWS Serverless

Location
Metropolitan Borough of Solihull, England, United Kingdom
Inside Job is seeking a Senior Backend Software Engineer to help build the technology that supports Gymshark's global growth. You will design and deliver scalable back-end services using Golang and AWS serverless patterns, collaborating with Product, Data, Operations and Platform teams. You will own API design ...

Technical Architect

Location
Manchester, England, United Kingdom
tenant architecture. This is a strategic, hands-on architecture role where you'll work closely with engineering leadership to define technical standards, shape platform design and drive the adoption of modern cloud and AI technologies. What you'll do as Technical Architect: Own the platform architecture and technical roadmap … leading the transition to a scalable multi-tenant SaaS platform. Act as the technical design authority, guiding architectural decisions across APIs, integrations, data platforms and cloud services. Define modern solutions across event-driven architecture, AI, orchestration and API strategy, balancing technical excellence with commercial considerations. What ...

Scala Engineer

Hiring Organisation
TALENT INTERNATIONAL UK LTD
Location
United Kingdom
Salary
£600.00 per day
efforts through incremental re-architecting - e.g. reducing the number of technologies that are required to support the pipeline and using managed services where appropriate. Design and develop clean functioning, testable code on the back-end, write effective APIs, develop and manage well-functioning databases and applications with security … Collaborate with the product owner, business analyst, data engineers and the wider teams to ideate software solutions Knowledge and experience Security clearance (SC-level) API design Data analysis Databases AWS suite experience Awareness of Site Reliability Engineering and support Skilled at returning services to good states in outage ...

Scala Engineer

Location
London, United Kingdom
efforts through incremental re-architecting - e.g. reducing the number of technologies that are required to support the pipeline and using managed services where appropriate. Design and develop clean functioning, testable code on the back-end, write effective APIs, develop and manage well-functioning databases and applications with security … Collaborate with the product owner, business analyst, data engineers and the wider teams to ideate software solutions Knowledge and experience Security clearance (SC-level) API design Data analysis Databases AWS suite experience Awareness of Site Reliability Engineering and support Skilled at returning services to good states in outage ...

Lead ML Engineer

Hiring Organisation
London Stock Exchange Group
Location
London, UK
Employment Type
Full-time
emphasis on defining the future product and platform experience, patterns, and contribution pathways that will enable federated scale over time. ML Engineers – Responsibilities & SkillsResponsibilities* Design and build MCP servers and tools that expose enterprise systems and workflows to AI agents.* Implement Skills that orchestrate tools, data, and reasoning into … repeatable, governed workflows.* Contribute to the LSEG AI Assist agentic harness, including planning, tool‐calling, and orchestration logic.* Build secure API wrappers where backend systems lack suitable authentication or entitlement models.* Work closely with product teams in a "build for" capacity, transferring knowledge and establishing reusable patterns.* Shape ...

Senior Go Microservices Engineer

Location
Cambridge, England, United Kingdom
Entrust is seeking a Senior Software Developer (GoLang) in Cambridge for a hybrid role with on-site days. You will design, implement and deploy microservices in GoLang within a cloud-native setup, shaping API design, testing and integration with the cloud ops function. The ideal candidate brings ...

IAM Product Engineer

Location
Greater London, England, United Kingdom
stability. Your responsibilities will be varied and impactful, offering a dynamic and challenging work environment. A fundamental aspect of this position is the design and construction of robust, scalable, and high-performing code. You will be instrumental in building the platform that opens the door to all our current … experience. You are a collaborative Software Engineer with proven professional experience in Javascript/Typescript , React , and Node.JS , you possess a strong understanding of API design , consumption, and client-side logic. You are proficient in writing unit and integration tests and have experience with NoSQL databases like Mongo ...

Senior Fullstack Engineer, Scale

Hiring Organisation
Airwallex
Location
London, UK
Employment Type
Full-time
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 stakeholdersMake pragmatic decisions on when to optimize for performance vs. velocity based on business impactThrive in cross-functional environments spanning Product, Design, Compliance, and SalesDesign for scale, maintainability, and production excellencePreferred qualifications: Fintech, payments, or regulated industry experienceHigh-scale performance tuning (100k+ QPS, large user bases, strict latency ...

Backend Engineer London

Location
Greater London, England, United Kingdom
each play a role in shaping Augur's product, value to customers and culture as we grow. We are looking for someone who can design and build the distributed systems, storage infrastructure, and platform primitives that underpin Augur's sensor integration product. You'll work across the full backend … surface: from stream processing and storage, to API design, data pipelines, and service architecture, in a Rust stack with Python at the platform API boundaries. You’ll be responsible for building robust, well-abstracted systems that scale with the demands of a growing integration and customer base ...