26 to 50 of 173 Remote/Hybrid API Design Jobs

Java Full Stack Developer

Hiring Organisation
Citigroup
Location
London, England, United Kingdom
tools.We actively embrace GenAI-assisted engineering (Devin, GitHub Copilot, Cursor) to automate boilerplate, accelerate unit testing, and achieve high engineering velocity.Key Responsibilities:Backend Microservices: Design, build, and maintain production-grade REST APIs and microservices using Java 21/25 and Spring Boot.Data Ingestion & Processing: Build resilient ETL and reconciliation … services that ingest, validate, and deduplicate complex monthly datasets from multiple upstream sources into a unified data model.Data Modeling & Storage: Design relational schemas (PostgreSQL/Oracle), optimize complex SQL queries, and implement transactional data integrity, staging layers, and immutable audit logs.Full Stack Collaboration (Bonus): Partner with or contribute ...

Software Architect (UK)

Location
Horsham, England, United Kingdom
negotiable depending on experience) Responsibilities and Duties The Software Architect role requires a professional who combines deep technical expertise with strategic vision to design and guide the implementation of scalable, maintainable software systems. They will be responsible for defining architectural standards, evaluating technology choices, and ensuring development teams have … software development Strong expertise in .NET development, C#, and Visual Studio Experience developing .NET based web services and distributed systems Demonstrated ability to design and implement scalable, maintainable software architectures Experience with architectural patterns (microservices, event‐driven, layered architecture, etc.) Strong understanding of software design principles (SOLID ...

Offensive Security Researcher

Location
Greater London, England, United Kingdom
reporting into a security workspace. The engineering challenge spans reliable execution, evidence quality and interfaces that people can follow. Work can range from an API authorisation path to an interrupted task, a noisy finding or a difficult mobile layout. The goal is to make the behaviour dependable … research Offensive Security Researcher Remote · Full-time Turn careful manual investigation into repeatable, evidence-led testing. What you will work on Investigate application and API attack paths in authorised environments. Develop test cases that distinguish an observation from a reproducible finding. Explain impact, remediation and retest requirements clearly. Useful ...

Senior Full Stack Developer

Location
Leeds, England, United Kingdom
Overview Senior Full Stack Developer role in Leeds. Hybrid work arrangement with two days in the office each week. You will design, build, and deliver high-quality solutions across the full technology stack in a cloud-native environment, collaborating with Product, Delivery, and Platform teams to enable secure, scalable … user-focused applications. Responsibilities Design, develop, and maintain scalable full-stack applications across the front end, back end, APIs, and data integrations. Lead the end-to-end delivery of features from technical design and architecture through development, testing, and deployment. Produce clean, maintainable, and well-tested code following ...

Senior Software Engineer | API Enterprise

Location
Greater London, England, United Kingdom
NVIDIA DGX SuperPODs to delivering real-time Language AI to over 300 million users and 200,000+ businesses globally. You will join the API Enterprise team. We sit at the intersection of DeepL's API platform and our Enterprise ecosystem. Whereas the Core team obsesses over the self … that enterprise IT and security teams depend on. We work hand-in-hand with a wide set of stakeholder teams to make DeepL's API the obvious and safe choice for global enterprises. We are shifting gears. We are moving from "Software-First" to "Product-First. ...

Senior Software Architect - C#/.NET & Distributed Systems

Hiring Organisation
Computer Futures
Location
United Kingdom
Employment Type
Permanent
Salary
GBP 70,000 - 100,000 Annual
market-leading Warehouse Control System platform. This position will suit a hands-on architect who enjoys working across the full software lifecycle, from solution design and architecture through to technical leadership, customer engagement and delivery. You'll help shape the future direction of a highly scalable warehouse automation platform … scalable and capable of supporting increasingly sophisticated automation technologies. Key Responsibilities Own and define application, integration, deployment and data architecture across the WCS platform. Design scalable, resilient and maintainable software solutions using modern Microsoft technologies. Collaborate with engineering teams to establish architectural standards, development frameworks and technical governance. Lead ...

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 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 ...

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 ...

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 ...

Software Engineering Tech Lead – Node.js, React & TypeScript

Location
Greater London, England, United Kingdom
technology, building scalable, cloud‐native solutions that connect our customers, colleagues and digital products. This is an opportunity to take real ownership of technical design and delivery. You'll be making architectural decisions, getting hands‐on with code and guiding engineers to build secure, reliable and high‐performing solutions … technical driving force behind our Customer Contact products, combining hands‐on software engineering with architectural ownership and technical leadership. You’ll design, build and evolve scalable, cloud‐native applications and services using modern technologies including Node.js, React, TypeScript and AWS. Working closely with our Product Manager, you'll translate ...

Junior Solution Architect

Hiring Organisation
Hackajob Ltd
Location
South West London, London, United Kingdom
Employment Type
Permanent, Work From Home
sector clients, helping to deliver our client services to the highest standard. The role will involve working with multiple business stakeholders, helping them to design business solutions which will then be implemented by the delivery teams. As a Junior Solution Architect, you will undertake structured analysis of technical issues … translating this analysis into designs that describe a solution. You will be consulted on design and can provide design patterns. You will identify the deeper issues that need fixing and look for opportunities to collaborate and reuse components, communicating with both technical and non-technical stakeholders. You will ...

Senior Frontend Engineer, Marketing Website

Location
Greater 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 Do Build, scale and evolve our section library: the Astro components, Sanity schemas and design tokens that … 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 ...

Technical Solutions Architect Permanent UK

Location
Greater London, England, United Kingdom
Role You will be responsible for creating enterprise-quality AI, ML, and Data Science based solutions. You will be involved in technology selection, API design, and establishing core patterns within our products and client projects. You will consider the functional and non-functional requirements to inform these decisions … quality solutions, with extensive experience and familiarity with how enterprise software solutions fit into a wider technical landscape Having a solid understanding of traditional Design Patterns and the ability to adapt these to the AI world Being a strong proponent for rigorous quality processes, automated testing and IaC principles ...

SVP - GenAI Full-Stack Engineer Lead

Location
Greater London, England, United Kingdom
real-world challenges that touch millions and get the opportunity to build the future of finance with Citi Tech. ### 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 ...

Senior Backend Engineer Node.js & AI

Hiring Organisation
Adria Solutions
Location
Manchester, North West, United Kingdom
Employment Type
Permanent, Work From Home
Salary
£85,000
platform itself, with opportunities to deliver features such as intelligent assistants, process automation and document processing. Youll take ownership of features from design through to production, working closely with product, design and engineering colleagues. Key responsibilities Build and maintain backend applications using Node.js. Develop APIs, database services … customer experiences and business processes. Own implementation, testing, deployment and ongoing support. Contribute to architecture, code reviews and engineering standards. Work collaboratively across product, design, platform and payments teams. What were looking for At least five years commercial software development experience. Strong experience developing Node.js backend systems. Proven API ...

Senior Backend Architect: Wallet & Global Accounts

Location
Greater London, England, United Kingdom
scale with us. 🎯 Your Responsibilities in this Role Own key architecture and implementation decisions for NALA's wallet and Global Accounts foundation Lead design work (RFCs, diagrams, API and system specs) to align on solutions before building Partner with the PM and stakeholders to translate business intent into … generated wallet delegation success rates Help launch Global Accounts into additional markets and kick off our stablecoin card capability Drive engineering quality across API standards, testing strategy, code review bar, and maintainability Manage delivery by breaking down complex work, sequencing milestones, and keeping projects moving end to end Make ...

Back End Developer (Java)

Location
Ipswich, England, United Kingdom
will develop secure, scalable, and high-performance backend systems that enable seamless integration with MACH’s cutting-edge solutions. Expertise in backend development, API design, and blockchain technologies will be critical to your success. Responsibilities include Design, develop, and maintain robust backend systems for MACH’s blockchain ...