API Design Job Vacancies

126 to 150 of 181 API Design Jobs

Software Engineer III (AI/ML)

Charlotte, North Carolina, United States
INSPYR Solutions
Strong understanding of cloud computing, containerization, and DevSecOps practices Proficient working with semi-structured file formats and Graph/NoSQL databases Strong understanding of layers of software stack including API design, development and production deployment at scale. Understanding of Healthcare industry standards and HIPAA privacy and security rules Excellent problem-solving, analytical, and critical thinking skills. Ability to …/Requirements Contributions to open-source AI/ML projects Experience in the healthcare industry Knowledge of medical terminology and clinical workflows Essential Functions Collaborate with product team to design, develop, and deploy world-class Decision Intelligence and AI-enabled products Explore novel solutions, often combining multiple AI/ML techniques Guide the architecture, infrastructure, tools, and processes used … Deeply understand a wide variety of algorithms to understand vulnerabilities, strengths, and weaknesses Rapidly develop prototypes to experiment and evaluate feasibility Standardize, optimize and scale products in production environments Design and implement scalable and efficient ML Ops pipelines for ingesting, processing, and storing large volumes of structured and unstructured data Keep abreast of the latest data platform and AI More ❯
Employment Type: Permanent
Salary: USD 95 Hourly
Posted:

Software Engineer - GammaLabs

Newbury, Berkshire, United Kingdom
Hybrid / WFH Options
Gamma Communications plc
space. Build responsibility and understanding of technical requirements such as capacity, security, maintainability, and other non-functional aspects. What will you be doing day-to-day? Collaborating on technical design and architectural decisions for new and existing systems Writing clean, efficient, and scalable Java code Conducting and participating in code reviews to maintain code quality and share knowledge Creating … internal and third-party systems as required What you'll need: Experience of Java (Java 8 minimum) Experience of object-oriented programming (OOP) Experience of SQL Experience of RESTful API design Experience using version control (ideally Git) Experience working in an Agile methodology Familiarity with CI/CD and related tooling Experience of test automation tooling (such as More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Data Architect

London, South East, England, United Kingdom
Hybrid / WFH Options
Harnham - Data & Analytics Recruitment
architecture, and delivering meaningful impact in data-driven transformations, this is an opportunity to lead from the front. Key Responsibilities Lead complex agile consulting projects focused on data architecture design and delivery Advise technology leaders on modern best practices in data management Develop cloud-based enterprise data platforms using AWS, Azure, or GCP Define services and frameworks that enable … management, automation, and network architecture Tech Domains Cloud Platforms: AWS, Azure, GCP Data Management: Metadata tools, privacy frameworks, security architecture Modelling: ER, Contextual, Semantic, Logical/Physical Orchestration & Integration: API design, DevOps support, cloud-native workflows Why Join? Work on high-impact transformation projects with top-tier global banks Join an agile, innovation-focused culture with flat structure More ❯
Employment Type: Full-Time
Salary: £110,000 - £118,000 per annum, Inc benefits
Posted:

Data Architect

London, England, United Kingdom
Hybrid / WFH Options
Harnham
architecture, and delivering meaningful impact in data-driven transformations, this is an opportunity to lead from the front. Key Responsibilities Lead complex agile consulting projects focused on data architecture design and delivery Advise technology leaders on modern best practices in data management Develop cloud-based enterprise data platforms using AWS, Azure, or GCP Define services and frameworks that enable … management, automation, and network architecture Tech Domains Cloud Platforms: AWS, Azure, GCP Data Management: Metadata tools, privacy frameworks, security architecture Modelling: ER, Contextual, Semantic, Logical/Physical Orchestration & Integration: API design, DevOps support, cloud-native workflows Why Join? Work on high-impact transformation projects with top-tier global banks Join an agile, innovation-focused culture with flat structure More ❯
Posted:

Data Architect

slough, south east england, united kingdom
Hybrid / WFH Options
Harnham
architecture, and delivering meaningful impact in data-driven transformations, this is an opportunity to lead from the front. Key Responsibilities Lead complex agile consulting projects focused on data architecture design and delivery Advise technology leaders on modern best practices in data management Develop cloud-based enterprise data platforms using AWS, Azure, or GCP Define services and frameworks that enable … management, automation, and network architecture Tech Domains Cloud Platforms: AWS, Azure, GCP Data Management: Metadata tools, privacy frameworks, security architecture Modelling: ER, Contextual, Semantic, Logical/Physical Orchestration & Integration: API design, DevOps support, cloud-native workflows Why Join? Work on high-impact transformation projects with top-tier global banks Join an agile, innovation-focused culture with flat structure More ❯
Posted:

Full Stack Developer

City of London, London, United Kingdom
Peregrine
of Angular and .NET projects. Proficiency in Angular (v12+), TypeScript, HTML5, CSS3, and RxJS. Solid experience with .NET Core/.NET 6+, C#, and Entity Framework. Experience with RESTful API design and integration. Familiarity with SQL Server or other relational databases. Understanding of CI/CD pipelines and version control systems (e.g., Git). Strong problem-solving skills More ❯
Employment Type: Permanent
Salary: £60,000
Posted:

Head of Engineering (Hands on)- London Hybrid

London, United Kingdom
Hybrid / WFH Options
Develop
on : Write production-quality code across Node.js, Express, GraphQL, TypeScript, React, and React Native . Deliver front-end excellence : Build fast, responsive web apps using Vite, React Query, Context API, and CSS frameworks . Integrate emerging tech : Incorporate AI/ML APIs, LLM-driven features, and automation tooling into our products. Design for scale : Lead on API design, performance optimisation, and secure, cloud-ready architectures. Build the team : Recruit, mentor, and grow high-performing engineers while raising the quality bar. Collaborate : Translate product goals into clear technical execution through strong communication and cross-team alignment. Nice to Have Experience with orchestration frameworks ( LangChain, LangGraph ) and multi-agent workflows Knowledge of vector databases, RAG pipelines, and … lightweight model hosting Ability to design data pipelines and feedback loops for improving AI-driven features Awareness of emerging AI areas such as multimodal, edge AI, or AI in DevOps/observability Why Join? A leadership role with real ownership and autonomy A chance to shape the future of the engineering function while remaining close to the code Competitive More ❯
Employment Type: Permanent, Work From Home
Posted:

Integration Engineer Contact (Outside IR35) - Oxfordshire

Oxford, Oxfordshire, South East, United Kingdom
Halian Technology Limited
Strong documentation and communication - Ability to work with business stakeholders (e.g., Marketing, Ops) - Project management or agile familiarity - Problem-solving and debugging - Security awareness (especially around data flows and API access) - Testing and Quality Assurance Tech RESTful API design and integration Power Automate (workflow automation) Power Apps (low-code app development) SQL (data querying and transformation API More ❯
Employment Type: Contract
Rate: From £400 to £550 per day
Posted:

Senior Backend Engineer - Commerce Platform

London, United Kingdom
Hybrid / WFH Options
Spotify
integrate with payment providers, manage disputes, and leverage ML for fraud detection and prevention. The reliability of these systems is business-critical for Spotify. What You'll Do Architect, design, and implement highly scalable backend services (Java/Python) and robust data pipelines that power Spotify's internal Commerce platform. Develop and enhance our ML-powered systems taking solutions … from concept to production. Take the lead on API design, platform development, and ensuring the scalability, reliability, and performance of our services. Collaborate with a talented, cross-functional team of engineers, product managers, and data scientists to deliver impactful solutions. Mentor other engineers and foster a culture of continuous learning and technical excellence within the team. Who You More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Senior Director, Technical Product Management

United Kingdom
Smarsh
the product vision is technically sound and achievable. A Strategic Business Thinker: You are as comfortable presenting a multi-year financial model to the CFO as you are debating API design with your engineering counterparts. You connect platform investments to clear business outcomes and can articulate the value of a foundational platform as a core business asset, not More ❯
Posted:

Senior Backend Engineer

Nationwide, United Kingdom
Hybrid / WFH Options
83zero Ltd
a strong focus on performance, scalability, and reliability. You'll lead technical discussions, mentor junior engineers, and collaborate across teams to deliver robust, secure, and efficient solutions. Key Responsibilities Design, build, and maintain high-performance backend services using Go. Develop and optimise RESTful APIs that power the platform and integrations. Lead architecture and implementation strategy discussions. Optimise system and … database performance (schema design, query tuning, etc.). Ensure backend services meet security, compliance, and reliability standards. Mentor junior engineers and contribute to best practices and documentation. Collaborate with QA, DevOps, Product, and Technical Services teams. Stay current with emerging technologies and industry trends. What We're Looking For 5+ years of backend engineering experience, including 3+ years with … Go. Strong experience with RESTful API design and distributed systems. Solid understanding of SQL/NoSQL databases and performance optimisation. Experience with RBAC, auditing, and secure system design. Familiarity with Agile/Scrum methodologies and Linux-based environments. Excellent communication, problem-solving, and mentoring skills. Bonus: Knowledge of virtualization, storage systems, or networking protocols. Why Join? Fully remote More ❯
Employment Type: Permanent
Salary: £70000 - £80000/annum Plus excellent benefits
Posted:

Enterprise Architect

City of London, London, United Kingdom
Deloitte
projects within the firm that suit your experience should you wish to continue with Deloitte. About the role: We are seeking an experienced Enterprise Architect to lead the strategic design of our application portfolio strategy. This role requires a deep understanding of application architecture principles, software development methodologies, cloud computing, cybersecurity, and enterprise architecture best practices. The successful candidate … strategic goals. Act as a trusted advisor to senior management and business leaders. Influence and shape technology decisions related to application development and deployment across the firm. Lead the design of complex and innovative application solutions , integrating various applications with other enterprise systems and cloud platforms. Provide strategic guidance and leadership to the application architecture team and related stakeholders … Intelligence, Case Management and Workflow. Leadership - Experienced at successfully leading and delivering complex application architecture and integration architectures. Deep understanding of application architecture patterns, software development methodologies ( Agile, Waterfall ), API design, integration technologies (ESB, message queues) and cloud-native application development. Communication: can present and articulate complex technical concepts to both technical and non-technical stakeholders across all More ❯
Posted:

Enterprise Architect

London Area, United Kingdom
Deloitte
projects within the firm that suit your experience should you wish to continue with Deloitte. About the role: We are seeking an experienced Enterprise Architect to lead the strategic design of our application portfolio strategy. This role requires a deep understanding of application architecture principles, software development methodologies, cloud computing, cybersecurity, and enterprise architecture best practices. The successful candidate … strategic goals. Act as a trusted advisor to senior management and business leaders. Influence and shape technology decisions related to application development and deployment across the firm. Lead the design of complex and innovative application solutions , integrating various applications with other enterprise systems and cloud platforms. Provide strategic guidance and leadership to the application architecture team and related stakeholders … Intelligence, Case Management and Workflow. Leadership - Experienced at successfully leading and delivering complex application architecture and integration architectures. Deep understanding of application architecture patterns, software development methodologies ( Agile, Waterfall ), API design, integration technologies (ESB, message queues) and cloud-native application development. Communication: can present and articulate complex technical concepts to both technical and non-technical stakeholders across all More ❯
Posted:

Enterprise Architect

london, south east england, united kingdom
Deloitte
projects within the firm that suit your experience should you wish to continue with Deloitte. About the role: We are seeking an experienced Enterprise Architect to lead the strategic design of our application portfolio strategy. This role requires a deep understanding of application architecture principles, software development methodologies, cloud computing, cybersecurity, and enterprise architecture best practices. The successful candidate … strategic goals. Act as a trusted advisor to senior management and business leaders. Influence and shape technology decisions related to application development and deployment across the firm. Lead the design of complex and innovative application solutions , integrating various applications with other enterprise systems and cloud platforms. Provide strategic guidance and leadership to the application architecture team and related stakeholders … Intelligence, Case Management and Workflow. Leadership - Experienced at successfully leading and delivering complex application architecture and integration architectures. Deep understanding of application architecture patterns, software development methodologies ( Agile, Waterfall ), API design, integration technologies (ESB, message queues) and cloud-native application development. Communication: can present and articulate complex technical concepts to both technical and non-technical stakeholders across all More ❯
Posted:

Enterprise Architect

london (city of london), south east england, united kingdom
Deloitte
projects within the firm that suit your experience should you wish to continue with Deloitte. About the role: We are seeking an experienced Enterprise Architect to lead the strategic design of our application portfolio strategy. This role requires a deep understanding of application architecture principles, software development methodologies, cloud computing, cybersecurity, and enterprise architecture best practices. The successful candidate … strategic goals. Act as a trusted advisor to senior management and business leaders. Influence and shape technology decisions related to application development and deployment across the firm. Lead the design of complex and innovative application solutions , integrating various applications with other enterprise systems and cloud platforms. Provide strategic guidance and leadership to the application architecture team and related stakeholders … Intelligence, Case Management and Workflow. Leadership - Experienced at successfully leading and delivering complex application architecture and integration architectures. Deep understanding of application architecture patterns, software development methodologies ( Agile, Waterfall ), API design, integration technologies (ESB, message queues) and cloud-native application development. Communication: can present and articulate complex technical concepts to both technical and non-technical stakeholders across all More ❯
Posted:

Enterprise Architect

slough, south east england, united kingdom
Deloitte
projects within the firm that suit your experience should you wish to continue with Deloitte. About the role: We are seeking an experienced Enterprise Architect to lead the strategic design of our application portfolio strategy. This role requires a deep understanding of application architecture principles, software development methodologies, cloud computing, cybersecurity, and enterprise architecture best practices. The successful candidate … strategic goals. Act as a trusted advisor to senior management and business leaders. Influence and shape technology decisions related to application development and deployment across the firm. Lead the design of complex and innovative application solutions , integrating various applications with other enterprise systems and cloud platforms. Provide strategic guidance and leadership to the application architecture team and related stakeholders … Intelligence, Case Management and Workflow. Leadership - Experienced at successfully leading and delivering complex application architecture and integration architectures. Deep understanding of application architecture patterns, software development methodologies ( Agile, Waterfall ), API design, integration technologies (ESB, message queues) and cloud-native application development. Communication: can present and articulate complex technical concepts to both technical and non-technical stakeholders across all More ❯
Posted:

Efx Software Engineer - Banking

London, United Kingdom
Vertus Partners
financial services. We're looking for an experienced eFX Software Engineer to build secure, high-performance trading systems in a collaborative, inclusive, and agile environment. What you'll do: Design and develop low-latency, fault-tolerant trading architectures Lead complex software initiatives using modern Java patterns (low-GC, lock-free) Collaborate across teams to deliver robust trading platforms and … optimisation, and CPU/memory management In-depth knowledge of networking protocols (TCP, UDP, Multicast, FIX) Experience in electronic/algorithmic trading and FX products Background in automated testing, API design, and DevOps workflows Ability to translate business needs into scalable technical solutions Flexible working options available. This is your chance to work on impactful projects and shape More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

FullStack Software Engineer

City of London, London, United Kingdom
Mentmore Recruitment
Experience working closely with product teams and designing for real users Strong frontend skills (JavaScript/Typescript, React/Angular, HTML) and backend expertise (Node.js, Python) Proven experience in API design and system integration Proficiency with Microsoft Azure and familiarity with databases, IAM, containers, and deployment tools Comfortable with rapid prototyping tools (e.g., Figma) Solid understanding of the … platforms Support low-code solutions, especially within Power Platform Agile & Iterative Development Work within a modern agile framework Participate in backlog grooming, technical scoping, and story writing Engage in design sessions, code reviews, and retrospectives Security, Quality & Operations Ensure compliance with security, privacy, and operational standards Monitor and improve the health of production code Enhance testing and deployment pipelines More ❯
Employment Type: Contract
Rate: £70000 - £80000/annum
Posted:

Senior PHP Developer

Chester, Cheshire, North West, United Kingdom
Hybrid / WFH Options
Hyperloop Recruitment
commercial experience with PHP MVC-based frameworks (Laravel, Zend, or Symfony) SQL/NoSQL Version control (Git) HTML5, CSS3 JavaScript Strong communicator (both written and verbal) Linux Shell (Bash) API design/development AWS Docker The role is paying up to £65,000 (DOE) + benefits including annual bonus & private medical insurance, and will be a hybrid working More ❯
Employment Type: Permanent, Work From Home
Salary: £65,000
Posted:

Senior Mobile Engineer

London, United Kingdom
Skin Analytics
Strong ability to integrate with REST APIs, manage secure authentication flows, and handle offline scenarios Basic understanding of backend systems (e.g. Node.js, AWS) to debug issues and contribute to API design discussions Proficient in Git, with best practices for branching, tagging, and changelogs Comfortable using tools like Jira, TestRail, and writing technical documentation Experience working in cross-functional More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Javascript Senior Software Engineer (AI Apps)

London, United Kingdom
Hybrid / WFH Options
Tether Operations Limited
that power AI-enhanced desktop applications. These services support intelligent features like local inference, contextual awareness, and model interaction, tailored specifically for Electron-based or hybrid clients. Platform-Aware API Design Collaborating closely with desktop and React Native teams, you will shape API contracts that reflect platform constraints and performance considerations - ensuring native-like responsiveness and cross More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Sr. Software Engineer - C++, Linux, System Software

Cambridge, Cambridgeshire, United Kingdom
Roku, Inc
should reach out. Come join us to build the next generation of great streaming players and TVs at a low cost for our customers. What you'll be doing Design and develop OS features in a multi-process environment that are fast, efficient and maximize platform flexibility Demonstrate excellence in C++ development and deliver high-performance, ultra-reliable software … optimisation, performance & memory. Implement features with the abstractions necessary to run on a variety of hardware Design for performance and ensure that your code is fast and resource efficient Demonstrate the ability to dig-deep to find solutions to new and challenging problems We're Excited If You Have 5+ years of experience developing Linux-based consumer electronic products … Excellent modern C++ programming skills Proven track record of success with embedded system development projects Experience in API design and developing portable code Deep understanding of multi-threaded development and concurrency management Experience with Linux IPC mechanisms Ability to architect, implement, and test systems for performance Bachelor's or Master's in Computer Science, or equivalent engineering experience More ❯
Employment Type: Permanent
Salary: GBP Annual
Posted:

Software Engineer, Typescript & Nest.js (m/f/d) (Trust Vault)

Wien, Austria
Hybrid / WFH Options
Bitpanda GmbH
and evolve Trust Vault , Bitpanda's secure crypto custody platform for institutions, banks, and DeFi access. You'll develop multi-chain wallets, work on low-level blockchain transactions, and design distributed systems in AWS. From concept to release, you'll deliver features that power seamless and secure digital asset interactions. Aufgaben Build and launch new features and services for … Bitpanda's Custody platform, used by leading financial institutions. Design and implement high-performance, event-driven backend systems on AWS with a modern microservices architecture. Tackle challenges across multi-chain integrations, secure transactions, and large-scale distributed systems. Collaborate with a motivated team of senior engineers who value knowledge-sharing, mentorship, and building things the right way. Contribute to … of blockchain and DeFi innovation. Profil Solid knowledge of TypeScript and hands-on experience building APIs with a focus on clean, maintainable code. Familiar with relational or NoSQL databases, API design, websockets, and network communication. Comfortable working with event-driven architectures, Node.js, AWS services, serverless (Lambdas), and Infrastructure-as-Code (CDK/Terraform). Curious and proactive - you More ❯
Employment Type: Permanent
Salary: EUR Annual
Posted:

Embedded Software Developer

Bristol, United Kingdom
Hybrid / WFH Options
Smartbox Assistive Technology
one or more of the following languages: C, C++, Rust. 4+ years of experience in embedded software development in C. Knowledge of Computer Science fundamentals in data structures, algorithm design, problem-solving, and complexity analysis. Strong grounding in embedded software architecture, with a focus on maintainability, modularity, fault-tolerance and testability. Confident and experienced with automated testing, including unit … integration and system tests, mocking and automation frameworks. An understanding of API design and the creation of clear, stable abstractions for hardware/firmware interaction. Skilled at debugging in constrained environments and using hardware/software debugging tools. A proven track record of innovation and quality software development throughout the entire software product lifecycle. Ability to solve complex More ❯
Employment Type: Permanent
Salary: £50000 - £60000/annum
Posted:

Embedded Software Developer

Bristol, Avon, South West, United Kingdom
Hybrid / WFH Options
Smartbox Assistive Technology
one or more of the following languages: C, C++, Rust. 4+ years of experience in embedded software development in C. Knowledge of Computer Science fundamentals in data structures, algorithm design, problem-solving, and complexity analysis. Strong grounding in embedded software architecture, with a focus on maintainability, modularity, fault-tolerance and testability. Confident and experienced with automated testing, including unit … integration and system tests, mocking and automation frameworks. An understanding of API design and the creation of clear, stable abstractions for hardware/firmware interaction. Skilled at debugging in constrained environments and using hardware/software debugging tools. A proven track record of innovation and quality software development throughout the entire software product lifecycle. Ability to solve complex More ❯
Employment Type: Permanent, Work From Home
Salary: £60,000
Posted:
API Design
10th Percentile
£50,000
25th Percentile
£62,500
Median
£80,000
75th Percentile
£91,875
90th Percentile
£127,500