101 to 125 of 447 Permanent API Design Jobs

Senior Software Engineer, Reference Data Platform (Python/Oracle) - AVP

Location
Belfast City District, Northern Ireland, United Kingdom
Senior Programmer Analyst (C12/AVP) to join our Master Reference Data (MRD) technology organization. In this role, you will be responsible for the design, development, testing and implementation of the Operating Model & Aritifical Intelligence (OMAI) Fusion application - a critical enterprise platform responsible for centralizing, mastering and distributing high … performance data processing pipelines, optimize complex database architectures and deliver resilient software solutions that support mission-critical enterprise operations. Key Responsibilities Application & Pipeline Development: Design, code, test and implement robust backend services, ETL data pipelines and batch/real-time processing components for the Fusion platform using Python. Database ...

Product Engineer

Location
Greater London, England, United Kingdom
problems end-to-end across our payments infrastructure: tokenisation, card network integrations, 3DS and dispute management. That runs from customer conversations, through API design, to production code and measuring whether it worked. You’ll lead by example: mentoring, raising the bar and owning technical direction, staying hands … team Requirements 6+ years of engineering experience, including 2–4+ recent years in at least one of: payments infrastructure or fintech, developer tooling, or design‐first products Strong fundamentals in distributed systems, networking and infrastructure, beyond just frameworks Product-minded: you think about the developer experience of every API ...

Senior Platform Engineer - Azure Data & AI Platform

Location
Greater London, England, United Kingdom
role. You'll be in the code, in the CLI, and in the infrastructure daily. What You’ll Actually Do Azure Platform Engineering (40%) Design and implement Azure landing zones, management groups, and subscription architecture Build and maintain hub‐spoke network topologies with proper segmentation and security controls Implement … data governance and cataloging Experience with Delta Lake, Spark optimization, data quality frameworks Azure networking certifications or equivalent deep knowledge Container orchestration (AKS) API design and management (API Management, App Gateway, Front Door) What Actually Matters Pragmatism over purity – you choose the right tool ...

Senior Fullstack Engineer (Go/React)

Location
Manchester, England, United Kingdom
openly, and taking pride in delivering software that makes a real business impact. What You’ll Do As a Senior Fullstack Engineer, you will: Design, build and maintain scalable, secure and resilient backend systems using Go, alongside rich, responsive frontends built with React. Lead technical design and architectural … Data access in Go using tools such as database/sql, sqlx, sqlc or GORM Authentication and authorisation including OAuth2, OIDC and JWT REST API design and implementation, with exposure to gRPC and Protocol Buffers Microservices and distributed system design SQL databases with strong query optimisation skills ...

Senior Fullstack Engineer (Go/React)

Location
Leeds, England, United Kingdom
openly, and taking pride in delivering software that makes a real business impact. What You’ll Do As a Senior Fullstack Engineer, you will: Design, build and maintain scalable, secure and resilient backend systems using Go, alongside rich, responsive frontends built with React. Lead technical design and architectural … Data access in Go using tools such as database/sql, sqlx, sqlc or GORM Authentication and authorisation including OAuth2, OIDC and JWT REST API design and implementation, with exposure to gRPC and Protocol Buffers Microservices and distributed system design SQL databases with strong query optimisation skills ...

Senior Fullstack Engineer (Go/React)

Location
City of Edinburgh, Scotland, United Kingdom
openly, and taking pride in delivering software that makes a real business impact. What You’ll Do As a Senior Fullstack Engineer, you will: Design, build and maintain scalable, secure and resilient backend systems using Go, alongside rich, responsive frontends built with React. Lead technical design and architectural … Data access in Go using tools such as database/sql, sqlx, sqlc or GORM Authentication and authorisation including OAuth2, OIDC and JWT REST API design and implementation, with exposure to gRPC and Protocol Buffers Microservices and distributed system design SQL databases with strong query optimisation skills ...

Senior Fullstack Engineer (Go/React)

Location
Greater London, England, United Kingdom
openly, and taking pride in delivering software that makes a real business impact. What You’ll Do As a Senior Fullstack Engineer, you will: Design, build and maintain scalable, secure and resilient backend systems using Go, alongside rich, responsive frontends built with React. Lead technical design and architectural … Data access in Go using tools such as database/sql, sqlx, sqlc or GORM Authentication and authorisation including OAuth2, OIDC and JWT REST API design and implementation, with exposure to gRPC and Protocol Buffers Microservices and distributed system design SQL databases with strong query optimisation skills ...

Senior Product Manager - External Developer Experience

Location
City Of London, England, United Kingdom
they get to their first payment and how much they trust us with more. You'll own the developer experience end to end: our API as a product, the technical documentation, the sandbox, and the white label offer for reseller and embedded partners. You'll set the standards that … that gets us there. Your role as a Senior Product Manager at Sokin: Own the strategy and roadmap for Sokin's external developer experience: API ownership, technical documentation, sandbox and, white label and SDKs Treat the API as a product: own design principles, consistency, and a published ...

Full Stack Software Engineer

Location
Greater London, England, United Kingdom
delightful to use. You’ll collaborate with passionate engineers and product managers to identify performance bottlenecks, contribute to architectural improvements, and help evolve our design system. This is a fantastic opportunity for an ambitious engineer looking to build their skills in a fast-paced environment and make a meaningful … Identify and solve performance issues across both frontend (Angular) and backend (PHP, Python, Go). Optimise page load speed, rendering performance, and API response times. Contribute to our design system and build reusable UI components using Angular and TypeScript. Help maintain and evolve scalable backend systems for high ...

Senior Cloud Software Developer

Location
Cambridge, England, United Kingdom
industrial companies. Job Title: Senior Cloud Software Developer Location: Cambridge, United Kingdom (Hybrid) Employment Type: Full-time Join AVEVA’s Core Services team to design and implement secure, resilient cloud platform capabilities using Microsoft Azure. This Senior-level role is suited to an experienced developer with a strong record … delivering complex technical solutions and an interest in cloud development. You will work as part of an agile team, contribute to design decisions, build high-quality services, and use modern engineering practices, including AI-assisted development tools, to improve productivity and software quality. Key responsibilities Design, develop ...

Lead Software Developer

Location
Leatherhead, England, United Kingdom
sustainability PURPOSE OF JOB: We are looking for a proactive, product-minded C# Developer to join our small, agile engineering team. The role will design, build and support secure, scalable applications across the full technology stack, with a strong focus on clean architecture, test-driven development and reliable delivery. … hats, learning new technologies and collaborating closely with product managers, designers and engineers to deliver user-centred solutions and drive technical excellence. KEY RESPONSIBILITIES: Design & Develop: Build and maintain backend services in C# using .NET Core/.NET 9, with a focus on clean architecture, scalability and maintainability. Full ...

Software Engineer - Front End - Studio (Core)

Location
Greater London, England, United Kingdom
will set technical direction, mentor other engineers, and own significant parts of the platform end to end. What You’ll Do Lead the design and delivery of complex, user-facing features and shared foundations for Clear Street Studio. Drive a system-design approach to building new front … Core team, including architecture, testing, tooling, and code quality. Mentor and grow other engineers through code review, pairing, and technical guidance. Partner with product, design, and back-end leads to shape roadmaps and turn ambiguous problems into clear technical plans. Own the operational excellence of your domains, ensuring reliability ...

Solutions Architect

Hiring Organisation
Euro Car Parks
Location
Central London, London, United Kingdom
Employment Type
Permanent
Ireland providing specialist services to a wide range of blue-chip clients. The role We are seeking technical polyglots who enjoy both technical architectural design, hands-on coding and peer reviews, though also like the idea of the equally important social/client-facing aspect of the role. … development architecture as well as supporting business analysts and product owners in planning and story-mapping for new development. You will act as technical design authority (TDA) for delivery of technical stories and produce technical documentation artefacts to support the delivery process. Main Responsibilities Duties will include: The design ...

Solutions Architect

Hiring Organisation
Euro Car Parks
Location
Islington, Norfolk, UK
Ireland providing specialist services to a wide range of blue-chip clients. The role We are seeking technical polyglots who enjoy both technical architectural design, hands-on coding and peer reviews, though also like the idea of the equally important social/client-facing aspect of the role. … development architecture as well as supporting business analysts and product owners in planning and story-mapping for new development. You will act as technical design authority (TDA) for delivery of technical stories and produce technical documentation artefacts to support the delivery process. Main Responsibilities Duties will include: · The design ...

Platform Lead – Data Availability, API & Integration

Location
Luton, England, United Kingdom
Description - Platform Lead – Data Availability, API & Integration (17454) Job Description Platform Lead – Data Availability, API & Integration ( 17454 ) Description At easyJet, we are transforming Airline Operations through modern product-led technology, operational excellence, automation, data, and AI-enabled capabilities. The Airline Operations Platform serves as the single point … critical crew, flight planning, network control, and engineering systems like AIMS, TOPS, LIDO, and AMOS. We are seeking a visionary Platform Lead – Data Availability, API & Integration to join our platform leadership team. In this critical role, you will own the integration strategy and data availability capability end to end. ...

Platform Lead – Data Availability, API & Integration

Location
Greater London, England, United Kingdom
Description - Platform Lead – Data Availability, API & Integration (17454) Job Description Platform Lead – Data Availability, API & Integration ( 17454 ) Description At easyJet, we are transforming Airline Operations through modern product-led technology, operational excellence, automation, data, and AI-enabled capabilities. The Airline Operations Platform serves as the single point … critical crew, flight planning, network control, and engineering systems like AIMS, TOPS, LIDO, and AMOS. We are seeking a visionary Platform Lead – Data Availability, API & Integration to join our platform leadership team. In this critical role, you will own the integration strategy and data availability capability end to end. ...

Full Stack Software Engineer

Location
Royston, England, United Kingdom
software for bioprocessing products used by pharmaceutical and biotechnology customers. You will contribute across the software development lifecycle, from requirements gathering and prototyping through design, development, testing, documentation, and release, helping to create solutions that support better health for more people. Based at our site in Royston (Hertfordshire), with … software functionality in collaboration with Product Management, customer feedback and internal development teams Translate requirements into sustainable software solutions through prototyping, clear software design and active participation in design reviews Architect and develop modern software applications and web components using technologies such as C#, .NET, TypeScript and React ...

Senior open to Mid Backend Software Engineer

Hiring Organisation
Just Eat Takeaway.com
Location
Amsterdam, Noord-Holland, Netherlands
Employment Type
Permanent
Salary
EUR Annual
scale, highly available, and resilient modern systems - supporting business continuity by maintaining our current systems and modernising partner systems within a small agile team. Design and build systems from scratch, collaborating with multiple engineering and product teams across the globe. Own services end to end. Decide how best … will you bring to the team? Hands-on experience working with object oriented languages: Kotlin or Java with sound understanding of 3rd party integrations, API Design, and development & CI/CD pipelines Experience with modern testing practices (unit, integration, regression). Hands-on experience with Cloud Infrastructure like ...

Senior AI Engineer, Legal - Canada Remote

Hiring Organisation
Danaher
Location
Greater London, United Kingdom
Employment Type
Full Time
Salary
150000 to 180000 CAD Annually
Danaher to understand their workflows, identify automation opportunities, and deliver solutions that legal teams trust and adopt. Architect and build AI-powered legal applications. Design end-to-end solutions for contract review, legal research, regulatory analysis, and compliance workflows using LLMs, retrieval-augmented generation (RAG), and agentic AI frameworks. … TypeScript) to deliver production applications using LLM APIs, orchestration frameworks (e.g., LangChain, LlamaIndex), and CI/CD pipelines — from prototype through deployment and monitoring. Design evaluation and quality framework. Build automated evaluation pipelines, test sets, and quality metrics specific to legal AI outputs, ensuring accuracy, consistency, and defensibility ...

Sr. Software Engineer

Location
Glasgow, Scotland, United Kingdom
engineering team, which builds the shared technology layer behind Barclays digital experiences. We are building a UI platform that is AI-native by design, where components, tokens, and patterns are delivered through tooling and APIs, not just code. This role leads the team shaping how digital experiences are built … Engineer - UI Platform Lead, you must have the following essential skills; React and TypeScript in a library or platform context (not just application code Design token architectures (DTCG, Style Dictionary, or similar) and the tooling that transforms tokens across platforms Building integrations between a platform and external tools (design ...

Senior .Net Developer

Hiring Organisation
Ascend Consulting
Location
Mill Hill, Dumfriesshire, United Kingdom
Employment Type
Permanent
Salary
GBP 50,000 - 85,000 Annual
Senior .Net Developer, C#/VB.Net, API, SQL, NW London to £85K A Back End Developer is required to join this established financial software house based in North London. They work with some of the leading brands in retail and media, offering financial management systems developed in house … required with expertise in Visual Basic .NET, C#, SQL Server, and SAP Business One integration. The ideal candidate should have strong skills in RESTful API development, database optimization, and Azure DevOps pipeline management. Knowledge of API security, CI/CD automation, and Swagger documentation is recommended. Responsibilities API ...

Senior .Net Developer

Hiring Organisation
Ascend Consulting
Location
NW7, Mill Hill, Greater London, United Kingdom
Employment Type
Permanent
Salary
£50000 - £85000/annum
Senior .Net Developer, C#/VB.Net, API, SQL, NW London to £85K A Back End Developer is required to join this established financial software house based in North London. They work with some of the leading brands in retail and media, offering financial management systems developed in house … required with expertise in Visual Basic .NET, C#, SQL Server, and SAP Business One integration. The ideal candidate should have strong skills in RESTful API development, database optimization, and Azure DevOps pipeline management. Knowledge of API security, CI/CD automation, and Swagger documentation is recommended. Responsibilities API ...

Senior Technical Manager (External Manufacturing)

Location
Ware, England, United Kingdom
approaches for re-use across products, sites and external partners. The role leads end-to-end outcomes from opportunity shaping and business case through design, delivery, adoption, transition to service and value realisation. Location: The successful applicant can be based at GSK HQ (London) or at the Ware (Hertfordshire … wide benefits and life at GSK we would suggest looking at our webpage Life at GSK | GSK. AGTech Skills Application Integrations Application Programming Interface (API) Security CI/CD Cloud Engineering Configuration Management (CM) Database Management Data Engineering Data Integration Front-End Development Internet of Things (IoT) Mobile Development ...

Senior Technical Manager (External Manufacturing)

Hiring Organisation
GSK
Location
Hertfordshire, United Kingdom
Employment Type
Full Time
approaches for re-use across products, sites and external partners. The role leads end-to-end outcomes from opportunity shaping and business case through design, delivery, adoption, transition to service and value realisation. Key Responsibilities (include..,): Lead the global External Manufacturing digital & technology roadmap, aligning CMC/NPI, technology … benefits and life at GSK we would suggest looking at our webpage Life at GSK | GSK . #AGTech Skills Application Integrations, Application Programming Interface (API) Security, CI/CD, Cloud Engineering, Configuration Management (CM), Database Management, Data Engineering, Data Integration, Front-End Development, Internet of Things (IoT), Mobile Development ...

Senior Frontend Engineer, Marketing Website

Hiring Organisation
Synthesia
Location
London, England, United Kingdom
accordingly.The defining challenge of this role is composability: a marketing site that marketers, and increasingly AI agents, can build pages with, without breaking design, performance or SEO.What You'll DoBuild, scale and evolve our section library: the Astro components, Sanity schemas and design tokens that let us compose … marketing pages consistently and accessibly.Own the content model. Design schemas that resist misuse, so an editor, or an agent, can build a page that is correct by construction rather than correct by review.Take Figma component specs all the way to production: responsive across mobile, tablet and desktop, accessible ...