26 to 50 of 70 API Design Jobs in London

SAP BTP Lead

Hiring Organisation
DXC
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
Youll collaborate with business and technical teams to drive innovation, modernize architectures, and maximize value from SAPs cloud technologies. What Youll Do: Lead architecture, design, and implementation of solutions using SAP BTP services such as SAP Build, Integration Suite, Event Mesh, AI Core, and HANA Cloud. Define clean-core … Guide teams in building custom apps, workflows, automations, and side-by-side extensions using CAP/RAP and low-code tools. Own integration and API strategies leveraging BTP Integration Suite (APIs, OData, REST/SOAP, event-driven patterns). Provide technical leadership, mentoring developers and ensuring adherence to coding ...

Senior Golang/Java Security Engineer

Hiring Organisation
Atrium Workforce Solutions Ltd
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£600 - £650 per day
vulnerability types SAST, SCA, and DAST, including the strengths and weaknesses of each At least one major cloud provider (e.g. AWS, GCP, Azure) REST API design HTTP Authentication Linux at the terminal, including scripting and automation (e.g. shell, Python) Some other highly valued skills may include: Experience with ...

Senior Backend Developer

Hiring Organisation
Oyster Consultants
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£60,000 - £80,000 per annum
technology choices, standards, and continuous improvement initiatives. Required Skills/Experience Strong C# development experience Experience with both .NET Core and .NET Web API Experience of building Microservices in .Net Core Experience using Message Based Architectures Experience using both SQL & NoSQL technologies Experience of API design Cloud ...

Senior Backend Engineer

Hiring Organisation
THE IDOLS GROUP LIMITED
Location
London, United Kingdom
Employment Type
Permanent
systems problems. Skills and experience Strong expertise in Python and modern backend frameworks Deep knowledge of relational databases, particularly PostgreSQL Strong understanding of RESTful API design and microservices patterns Experience working with cloud platforms and containerised environments (Docker, Kubernetes) Experience with CI/CD pipelines, automated testing ...

Senior Salesforce Developer

Hiring Organisation
Salt Search
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
telco, working fully remote from Hungary. Blend of hands-on Salesforce engineering, integrations, and AI-driven solutions in an Agile (Scrum) environment. Key responsibilities Design and develop high-quality solutions on Salesforce Service Cloud and Sales Cloud based on business requirements. Contribute actively to the customer's Salesforce development … community, sharing best practices and patterns. Build, enhance, and maintain Lightning components, Apex classes/triggers, flows, and complex configuration. Design and implement integrations with various internal and external systems, with and without middleware, following Force.com API best practices and integration patterns. Support the design and development ...

(Senior) Full Stack Engineer

Hiring Organisation
BioTalent
Location
City of London, London, United Kingdom
with potential leadership options A high-autonomy role within a technically rigorous environment Your Responsibilities Own and evolve the React and Next.js application architecture Design and implement scalable UI patterns for complex workflows and data visualisation Define state management strategies for long-running jobs and asynchronous systems Build clean … years of experience building production React applications - React, Next.js, TypeScript Experience deploying and managing applications on AWS using Infrastructure as Code and containerized workflows API Design experience UX/UI & Design systems Experience with state management at scale (e.g. React Query, Zustand, Recoil) Knowledge of authentication, authorisation ...

Application Security Engineer

Hiring Organisation
Atrium Global
Location
City of London, London, United Kingdom
Employment Type
Contract
Contract Rate
From £550 to £650 per day
strengths and weaknesses of each At least one programming language (e.g. Java, Go) At least one major cloud provider (e.g. AWS, GCP, Azure) REST API design HTTP Authentication Linux at the terminal, including scripting and automation (e.g. shell, Python) Some other highly valued skills may include: Experience with ...

Senior Platform Software Engineer - F56465

Hiring Organisation
Caresoft Global Ltd
Location
Stratford, London, England, United Kingdom
Employment Type
Contractor
Contract Rate
£73.18 per hour
PubSub, Secret Manager). Observability: Experience implementing and utilizing observability and monitoring tools (e.g., Grafana, Splunk) to maintain system health and diagnose issues. API Design: Experience designing and developing REST APIs and associated QA tools. Engineering Practices: Passion for Software Craftsmanship with experience in Pair Programming, Mobbing ...

Junior Back-end Engineer

Hiring Organisation
ivee
Location
London Area, United Kingdom
maintain server-side logic using modern backend frameworks (e.g. Node.js, Python, Go) Work with APIs — designing, integrating, and maintaining RESTful endpoints Support database design and optimisation (e.g. PostgreSQL, MongoDB) Collaborate with front-end and product teams to deliver full-stack features Write clean, testable, and maintainable code Help improve ...

AI Platform Engineer

Hiring Organisation
The Portfolio Group
Location
City of London, London, England, United Kingdom
Employment Type
Full-Time
Salary
Competitive salary
owning the cloud-native platform that underpins conversational AI and generative AI products at scale. Sitting at the core of AI delivery, you will design, build, and operate the runtime, infrastructure, and operational layers supporting RAG pipelines, LLM orchestration, vector search, and evaluation workflows across AWS and Databricks. Working … platform powering conversational assistants and generative AI products. Build, operate, and optimise RAG and LLM-backed services, improving latency, reliability, and cost. Design and run cloud-native AI services across AWS and Databricks, including ingestion and embedding pipelines. Scale and operate vector search infrastructure (Weaviate, OpenSearch, Algolia, AWS Bedrock ...

Technical Architect

Hiring Organisation
Sphere Digital Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 - £90,000 per annum
office Technical Architect About the role This is a rare opportunity to join a government-backed initiative at a very early stage, helping to design and deliver a new digital platform that enables transparent licensing and ethical access to high-quality digital content at scale. We are assembling … that the platform is secure, intuitive, and reliable for all users. This is a hands-on architecture role focused on system design and technical delivery rather than business development or account management. The role also plays a key part in shaping the future technical service offering by applying lessons ...

Senior Scala Developer

Hiring Organisation
SF Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£60,000 - £90,000 per annum
following key skills: - At least 4 years commercial Scala programming - Strong framework experience (Akka, Play etc) - Relational database experience - PostgreSQL - MongoDB, NoSQL - RESTful API design and integration experience - Solid unit test understanding - Spec2, scalaTest etc - Experience working in a TDD/BDD driven environment - Containerization experience - Docker, Kubernetes … well-established friendly team then please apply now to be considered and for further details. Senior Scala Developer Up to £90,000 Scala, REST Api, NoSQL, TDD/BDD, functional programming, CI/CD, Play, Akka ...

Founding Engineer (Full Stack / Backend)

Hiring Organisation
Affinity Labs
Location
London Area, United Kingdom
early-stage, hands-on role with significant autonomy and responsibility to drive backend product development, collaborating closely with founders, creators, and product/design to turn lean specs into reliable, scalable services. Responsibilities Implement features end-to-end on the backend (APIs → data models → integrations) and maintain quality while … z2bz0 years building production backends/services , with shipped work and clear ownership. Strong Python (FastAPI) and database skills ( PostgreSQL/MongoDB ); solid API design fundamentals. Familiarity with AWS serverless patterns and Docker for bespoke services; basic CI/CD concepts. Comfortable with Redis (caching/sessions ...

Back End Developer

Hiring Organisation
Prism Digital
Location
London Area, United Kingdom
that don’t yet have perfect answers. What You’ll Work With Python development at a high level FastAPI or adjacent Python backend frameworks API design and backend architecture fundamentals PostgreSQL and/or MongoDB React or React Native for frontend collaboration AWS serverless infrastructure Docker for bespoke ...

Senior Backend Engineer [Django]

Hiring Organisation
QOVES
Location
Greater London, England, United Kingdom
rapidly growing user base. Expect a fast-paced, high-autonomy role where your work directly impacts the future of the product. Key Responsibilities Design and implement new backend endpoints and services using Django, Python, and FastAPI building on the existing codebase Build and maintain scalable REST APIs, integrating PostgreSQL … updates, and storage Drive performance, security, and scalability best practices as we scale rapidly in the next 6-12 months Collaborate closely with Product, Design, and Frontend teams to deliver seamless and intuitive user experiences Own key architectural decisions while mentoring engineers and elevating backend engineering standards Build data ...

Backend Engineer (TypeScript/Ruby)

Hiring Organisation
Oliver Bernard
Location
London Area, United Kingdom
experiences at scale. Package 💷 £70–90k + 5% bonus 🏢 Hybrid (2 days onsite, London) What you’ll do Own the full lifecycle of services: API design, architecture, deployment, and production Build an internal platform delivering consistent, real-time communications across multiple digital touchpoints Collaborate with Product, Data, Marketing ...

Staff Engineer

Hiring Organisation
Corecom Consulting
Location
City of London, London, United Kingdom
Employment Type
Permanent
Salary
£110000 - £130000/annum
10+ years) Expert-level Python, with deep understanding of async patterns and performance optimisation Proven experience designing and scaling distributed systems Strong background in API design, data-intensive systems, and service architecture Track record of building platforms that operate reliably under heavy load Nice to have: Experience with ...

Monitoring Tools Support Specialist

Hiring Organisation
Accenture
Location
London Area, United Kingdom
Tooling Expertise: Use Prometheus, Grafana, and Dynatrace for data collection, visualisation, and deep-dive analysis. •Proficiency in Prometheus, Grafana, and Dynatrace. •Strong knowledge of API design, data modelling, and pipelines. •Experience with automation, monitoring platforms, and scripting languages (e.g., Python, PowerShell, Bash, Terraform and Ansible) to enhance operational ...

Mobile App Developer - London

Hiring Organisation
Square One Resources
Location
London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 450 - 537 Daily
PubSub, Secret Manager). Observability: Experience implementing and utilising observability and monitoring tools (eg, Grafana, Splunk) to maintain system health and diagnose issues. API Design: Experience designing and developing REST APIs and associated QA tools. Technical Experience Preferred Engineering Practices: Passion for Software Craftsmanship with experience in Pair ...

Site Reliability Engineer

Hiring Organisation
McGregor Boyall
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£90,000 - £95,000 per annum
SLOs, and participating in support rotas. Coding/scripting experience (Python/Bash) in a commercial setting. Database knowledge, streaming and batch operations, and API design. Good background with Kubernetes (ideally microservice architectures using Istio service mesh). Extensive experience with cloud-native solutions (ideally Google Cloud). Solid ...

Senior Software Engineer

Hiring Organisation
Stott and May
Location
City of London, London, United Kingdom
onsite) Salary: Up to £80k DOE Type: Perm Job Description We are looking for a passionate Senior Java Engineer in London to lead the design and development of core product features and services that power an app used by thousands of travellers on a daily basis. As a Senior … impactful product features Ensure the quality of the features you built, follow-up on usage/issues post release. Work closely with product and design team to deliver new features that align with the needs of the business Provide technical leadership and mentoring to other engineers on the team ...

Back End Developer

Hiring Organisation
Stott and May
Location
London Area, United Kingdom
onsite) Salary: Up to £80k DOE Type: Perm Job Description We are looking for a passionate Senior Java Engineer in London to lead the design and development of core product features and services that power an app used by thousands of travellers on a daily basis. As a Senior … impactful product features Ensure the quality of the features you built, follow-up on usage/issues post release. Work closely with product and design team to deliver new features that align with the needs of the business Provide technical leadership and mentoring to other engineers on the team ...

Senior Quant Developer

Hiring Organisation
OpenBet
Location
London Area, United Kingdom
team's services such as Alerting for Traders. · Manages data pipelines on the cloud and ensures they are efficient and scalable. · Implements new design patterns for coding best practice in object-oriented programming and communicates them to the team. · Engages with client-facing teams to understand customer's needs … from idea to integration. · Acts as a mentor for junior team members and leads regular knowledge share sessions on subjects like sports betting models, API design, and cloud solutions. The Player · A postgraduate qualification in Data Science, Machine Learning, Statistics, Mathematics or a closely related quantitative field. · 5+ ...

Salesforce &/ React Native Developer

Hiring Organisation
Atrium Workforce Solutions Ltd
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
£500 - £550 per day
IR35) Sector: Banking Key Skills & Experience Salesforce +5 years experience AND/OR React Native (Web) +5 years Java +5 years TDD, BDD RESTful API design & build OAS/YAML Unit Testing GitLab CI/CD Pipelines Agile practitioner, SonarQube, Veracode, Jira, Confluence Banking/Financial services background ...

C# Developer

Hiring Organisation
VIQU IT
Location
City, London, United Kingdom
Employment Type
Contract
Contract Rate
GBP 300 - 350 Daily
Developer: Must have a strong background in C#/.NET development. Experience of PostgresSQL or other SQL databases. CI/CD experience. Experience in API design and building system integrations. Microsoft Dynamics integration (highly desirable). Python and/or JavaScript experience (desirable). Excellent communication skills ...