26 to 46 of 46 API Design Jobs in London

Observability Engineer (Custom Data Integration)

Hiring Organisation
Ascendion
Location
South London, UK
Employment Type
Full-time
Title: Observability Engineer (Custom Data Integration) Location: Remote(UK) Key responsibilities Design and implement observability frameworks: Integrate and manage monitoring, logging, and tracing for cloud-native and on-premises systems. Data integration and ingestion: Build systems to collect and ingest data from various sources, often through APIs, and manage … usage. Required skills and qualifications Technical skills: Proficiency in Prometheus, Grafana, and Dynatrace. o Experience with time-series data, including PromQL. Strong knowledge of API design, data modeling, and data pipelines. Expertise in scripting and backend development (e.g., Python, Go, Java). Experience: Proven experience designing and scaling ...

Senior Python Software Engineer - £90k - £100k

Hiring Organisation
Creo Recruitment
Location
London, UK
Employment Type
Full-time
Type: Full-time, Permanent About the Role We're looking for a Senior Software Engineer with deep experience in Python and AWS to help design, build, and scale distributed, data-driven Ad-Tech systems. You'll lead the delivery of cross-service features within a modern cloud platform, making … direction, mentoring engineers, and ensuring the systems you build are secure, observable, and resilient. Key Responsibilities Lead complex delivery: Drive the end-to-end design and implementation of Python-based microservices and cloud-native solutions hosted on AWS. Architect and optimise systems: Define service boundaries, data ownership, and failure ...

Cloud Solution Architect

Hiring Organisation
International Business Solutions Consulting Limited
Location
Central London, London, United Kingdom
Employment Type
Contract, Work From Home
Contract Rate
£500 per day
/SLIs, Terraform and modern CI/CD tools (Azure DevOps, GitHub Actions, Harness, Jenkins, Spinnaker), Containers & orchestration (Kubernetes) and service mesh (eg, Istio), API design & security (REST/OpenAPI, mTLS, authN/Z), Scripting in Bash, PowerShell, or Python, Cloud Expertise (Depth in One, Ready to Cross … Train), Azure: ARM/Bicep, AKS, Application Gateway, API Management, Azure Storage, GCP: GKE, Cloud Load Balancing, Cloud Armor, Istio, Stackdriver, Jenkins, Apigee. The ideal candidate will desirably have strong experience in Harness, HashiCorp Vault, Dynatrace, Docker/buildah, NodeJS for API tooling, Relevant Azure or GCP certifications. ...

Senior Technical Architect

Hiring Organisation
RED Global
Location
London, UK
Employment Type
Full-time
flow diagrams). Hands-on experience with major cloud platforms (preferably AWS), including Infrastructure as Code, networking, and security. Deep understanding of secure system design, authentication patterns, and observability. Familiarity with languages such as Ruby, Python, or Java, and modern practices (CI/CD, TDD, containerisation). Strong knowledge … data modelling, API design, and integration patterns. If you would like immediate consideration, please send me an updated CV/contact details to jcaria@redglobal.com so we can discuss further or reach out to me through LinkedIn. ...

Senior Implementation Architect

Hiring Organisation
Supermetrics
Location
London, UK
Employment Type
Full-time
Execution. Act as the critical link between customer business objectives and technical implementation, ensuring the platform is deployed effectively and delivers maximum value. Design Scalable Solutions. Architect data integrations, API workflows, and platform customizations that align with customer goals and integration architecture. Drive Customer's Technical Success. … scalable implementation methodologies, templates, and best practices. This position is for you if you have... Extensive knowledge of JavaScript (for client and server environments), API design and integration, SQL, and database management, coupled with a background in data-driven solutions and system integrations. Proven ability to translate complex ...

Senior Implementation Architect

Hiring Organisation
Supermetrics
Location
South London, UK
Employment Type
Full-time
Execution. Act as the critical link between customer business objectives and technical implementation, ensuring the platform is deployed effectively and delivers maximum value. Design Scalable Solutions. Architect data integrations, API workflows, and platform customizations that align with customer goals and integration architecture. Drive Customer's Technical Success. … scalable implementation methodologies, templates, and best practices. This position is for you if you have... Extensive knowledge of JavaScript (for client and server environments), API design and integration, SQL, and database management, coupled with a background in data-driven solutions and system integrations. Proven ability to translate complex ...

eFX Engineer

Hiring Organisation
Sanderson Recruitment
Location
City of London, London, United Kingdom
Employment Type
Permanent
+ benefits/Bonus Join a leading financial technology and trading organisation driving innovation in electronic markets. As an eFX Software Engineer, you'll design and deliver high-performance, low-latency trading solutions that underpin mission-critical systems. This role offers the chance to work on cutting-edge technology … where speed, scalability, and resilience are key. About the Role Lead the design and development of secure, high-performance eFX systems Define and evolve Java patterns and techniques optimised for ultra-low latency (<40s) Architect fault-tolerant, scalable trading systems Influence technical strategy, architecture, and product roadmaps Collaborate with ...

Senior Product Manager, Network Services

Hiring Organisation
Cloudflare
Location
London, UK
Employment Type
Full-time
through quantitative and qualitative methods (A/B and multivariate testing, user testing, etc). Scripting/programming experience A solid understanding of RESTful API design & documentation. Experience developing pricing for new enterprise SaaS products. Capacity planning, cost modeling, and operations research experience. What Makes Cloudflare Special ...

Fullstack Engineer (Backend leaning)

Hiring Organisation
Ben
Location
London, UK
Employment Type
Full-time
shaping why we build things, how we build them, and what the future of our product looks like. You'll collaborate across product, design, and engineering to make decisions that matter: data models, integration patterns, API design, scalability choices, and how we support a system used … polished, intuitive experiences Contribute to technical discovery, architecture thinking, and implementation planning Ask product and UX questions when something doesn't quite add up Design with scale, reliability, and enterprise readiness in mind (security, compliance, flexibility) Own your work from idea to production and care about the impact once ...

Backend Developer

Hiring Organisation
Hays Technology
Location
London, United Kingdom
Employment Type
Permanent
Salary
£100000 - £110000/annum £110,000 -£130,000
product strategy. Requirements: Strong foundations in algorithms, data structures, and distributed systems Experience building and operating large-scale backend systems Expertise in system and API design, scalability, and performance tuning Proficiency in a modern backend language (Java preferred) Knowledge of cloud-native architectures, containers, and CI/ ...

Backend Developer

Hiring Organisation
Hays Specialist Recruitment Limited
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£100,000 - £110,000 per annum
influencing product strategy.Requirements: Strong foundations in algorithms, data structures, and distributed systems Experience building and operating large-scale backend systems Expertise in system and API design, scalability, and performance tuning Proficiency in a modern backend language (Java preferred) Knowledge of cloud-native architectures, containers, and CI/ ...

Principal Engineer - AI & Data Platforms

Hiring Organisation
ARM
Location
Hounslow, London, Heathrow Villages, United Kingdom
Employment Type
Contract
international organisation in the aviation sector is seeking a Principal Engineer to lead the design and delivery of enterprise-scale engineering solutions supporting AI-driven platforms. This is a senior, hands-on role embedded within a major airline environment, with responsibility for setting technical direction and ensuring solutions scale … role requires consultancy-level technical depth, strong delivery discipline, and the ability to translate complex operational needs into scalable, enterprise-ready solutions. Key Responsibilities Design and own architecture across all layers of the technology stack. Write production-grade code and deliver enterprise-ready solutions at pace. Engineer scalable, modular ...

eFX Software Engineer Java

Hiring Organisation
Harnham - Data & Analytics Recruitment
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£140,000 - £160,000 per annum
designing high-performance architectures and distributed systems Strong grasp of FX pricing, risk, and trading workflows Solid engineering fundamentals: testing, CI/CD, API design, automation Why join? Work on mission-critical systems powering global trading Highly technical culture with genuine ownership and impact Flexibility in working hours ...

Senior ML Engineer/Data Scientist

Hiring Organisation
Quantori
Location
London, UK
Employment Type
Full-time
solution and code interpreter Experience with Multi-agent system architecture (e.g., LangGraph, ToolUniverse) Experience with MCP tool integration and orchestration Experience with API design and integration Experience with tool wrapping and interoperability Experience with Error handling and debugging (agentic workflows, logs) Experience with Modular system design, performance ...

Senior ML Engineer/Data Scientist

Hiring Organisation
Quantori
Location
South London, UK
Employment Type
Full-time
solution and code interpreter Experience with Multi-agent system architecture (e.g., LangGraph, ToolUniverse) Experience with MCP tool integration and orchestration Experience with API design and integration Experience with tool wrapping and interoperability Experience with Error handling and debugging (agentic workflows, logs) Experience with Modular system design, performance ...

Senior Developer

Hiring Organisation
Reed
Location
Holborn, London, England, United Kingdom
Employment Type
Full-Time
Salary
£70,000 - £80,000 per annum, Inc benefits
commercial software development experience. Proven success in high-performing engineering teams within fast-paced environments. Deep expertise in: Python (Django, Flask, or FastAPI) PostgreSQL (design, optimisation, maintenance) Containerisation (Docker/Kubernetes) Event-driven architecture (Kafka/RabbitMQ) Desirable experience includes: TypeScript/JavaScript (NextJS, NodeJS, Tailwind) Terraform and DevOps … practices Experience in building and scaling SaaS platforms in production. Strong background in software architecture, microservices, and API design. Hands-on experience with AWS platform. Excellent communication skills, capable of motivating and aligning technical teams. Experience with AI tools, APIs, or ML pipelines is highly desirable. Bonus: Exposure ...

Integration Architect

Hiring Organisation
The Curve Group
Location
City, London, United Kingdom
Employment Type
Contract
Contract Rate
GBP Annual
experienced Integration Architect to join on a 12-month contract . This role is ideal for someone who specialises in system integration, API design, and cloud-based architecture (Azure) and enjoys shaping strategy as well as guiding delivery teams click apply for full job details ...

Product Owner

Hiring Organisation
Oho Group Ltd
Location
London, UK
Employment Type
Full-time
finance or trading environment Hands-on experience with CFD, spread betting, or investment product development Confident using JIRA, Confluence, Figma, Miro Strong understanding of API design, agile practices, and release processes Proven ability to collaborate directly with engineering leadership Bonus Skills Familiarity with trading platform architecture or microservice ...

Senior Full Stack Engineer

Hiring Organisation
McGregor Boyall
Location
London, South East, England, United Kingdom
Employment Type
Full-Time
Salary
£80,000 - £120,000 per annum
leading global investment management firm in London. Paying up to 120k plus bonus per annum, you will contribute to the development, optimisation, and design of front-office applications, collaborating with portfolio managers and product owners to create innovative and high-performance solutions. As a Senior Full Stack Software Engineer …/UX. Proven backend expertise, particularly with Java (Python, Node.js a plus), and experience building distributed microservices-based architectures. Strong knowledge of system design principles, scalable architecture patterns, and API design. Hands-on experience with relational (Postgres, MySQL) and NoSQL (DynamoDB) databases. Proficiency in cloud platforms (AWS, Azure ...

Lead Technical Business Analyst

Hiring Organisation
Lorien
Location
London, South East, England, United Kingdom
Employment Type
Contractor
Contract Rate
Salary negotiable
mitigate risks associated with migration and system cutover. Core Skills & Experience: Proven expertise in PAS systems and complex data migration projects. Strong knowledge of API design and integration . Advanced data modelling skills for structured and semi-structured data. Proficiency in XML, JSON, and Excel for data handling ...

Lead Product Manager

Hiring Organisation
ZONTAL
Location
London, UK
Employment Type
Full-time
understand real-world workflows across R&D, QC, and manufacturing. Run structured discovery (interviews, ride-alongs, lab visits, pilots) to understand sample lifecycles, assay design, automation constraints, and regulatory requirements. Technical Product Ownership Own product requirements from problem statement through detailed specifications: user stories, data models, and non-functional … industry standards, such as Allotrope Simple Model (ASM), and related standards to create interoperable, open systems. Work with internal and external SMEs to design and evolve semantic models, controlled vocabularies, and mappings between lab systems and the ZONTAL data backbone. Ensure alignment with FAIR principles, ALCOA+, 21 CFR Part ...