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36 API jobs in Addlestone + 20 miles
319 exact matches jobs are outside your preferred location
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Build and work with modern API and microservices architectures
Build and work with modern API and microservices architectures
NEWEQUALITY BOOST
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Experience creating RESTful APIs and ensuring API extensibility
Experience creating RESTful APIs and ensuring API extensibility
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Build and work with modern API and microservices architectures
Build and work with modern API and microservices architectures
PREMIUM
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API analysis and design
API analysis and design
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Senior Backend Engineer (Platform & Security)
Senior Backend Engineer (Platform & Security)
Ventula Consulting Limited
The City, EC3V 9DU
Up to £140,000 per annum
Strong understanding of distributed systems, microservices architecture, and API design.
Strong understanding of distributed systems, microservices architecture, and API design.
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Experience with API development and integration
Experience with API development and integration
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Senior Android Engineer (Native Integration & Security)
Senior Android Engineer (Native Integration & Security)
Ventula Consulting Limited
The City, EC3V 9DU
Up to £140,000 per annum
Build a robust, efficient, and scalable client-side API integration layer to consume real-time security signals (like our proprietary Scam_Score) from the AI Core. Partner with the Senior Backend Engineer (Application & AI Orchestration) to define the API contracts and real-time data flow needed to power the Security Shield.
Build a robust, efficient, and scalable client-side API integration layer to consume real-time security signals (like our proprietary Scam_Score) from the AI Core. Partner with the Senior Backend Engineer (Application & AI Orchestration) to define the API contracts and real-time data flow needed to power the Security Shield.
Senior Android Engineer (UI/UX & Welcome Manager)
Senior Android Engineer (UI/UX & Welcome Manager)
Ventula Consulting Limited
The City, EC3V 9DU
Up to £140,000 per annum
API & Backend Integration: Partner with our backend (Application & AI Orchestration) engineers to define and integrate the client-side APIs and data models required to power the Welcome Manager's features, from live transcription to post-call entity-extracted summaries.
API & Backend Integration: Partner with our backend (Application & AI Orchestration) engineers to define and integrate the client-side APIs and data models required to power the Welcome Manager's features, from live transcription to post-call entity-extracted summaries.
Senior Backend Engineer (Application & AI Orchestration)
Senior Backend Engineer (Application & AI Orchestration)
Ventula Consulting Limited
The City, EC3V 9DU
Up to £140,000 per annum
API & Application Development? Partner closely with the Senior Android Engineers to define robust API contracts and ensure a seamless, low-latency experience for the live transcript and mid-call intervention features.
API & Application Development? Partner closely with the Senior Android Engineers to define robust API contracts and ensure a seamless, low-latency experience for the live transcript and mid-call intervention features.
Senior Backend Engineer (Telco Integration Lead)
Senior Backend Engineer (Telco Integration Lead)
Ventula Consulting Limited
The City, EC3V 9DU
Up to £140,000 per annum
We are seeking a foundational engineer to own our single greatest strategic asset: our unique, privileged access to network-level intelligence via the GSMA CAMARA API standard. Own and build the Security Signal Ingestion path, the secure, low-latency, and out-of-band data channel connecting to our founding members' network API gateways. Ensure all network API integrations meet the stringent P99 latency budgets (e.g., < 150ms) required to support our sub-500ms Time-to-Trust product goal. Collaborate with the platform team to build a parallel development path using mocked data to mitigate risks of network API delays. Deep understanding of API design (REST, gRPC, Webhooks) and API security (OAuth 2.0, mTLS, JWTs).
We are seeking a foundational engineer to own our single greatest strategic asset: our unique, privileged access to network-level intelligence via the GSMA CAMARA API standard. Own and build the Security Signal Ingestion path, the secure, low-latency, and out-of-band data channel connecting to our founding members' network API gateways. Ensure all network API integrations meet the stringent P99 latency budgets (e.g., < 150ms) required to support our sub-500ms Time-to-Trust product goal. Collaborate with the platform team to build a parallel development path using mocked data to mitigate risks of network API delays. Deep understanding of API design (REST, gRPC, Webhooks) and API security (OAuth 2.0, mTLS, JWTs).
Experience creating RESTful APIs and ensuring API extensibility.
Experience creating RESTful APIs and ensuring API extensibility.
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Fullstack with C# Dot net HTML Web Software Developer
Fullstack with C# Dot net HTML Web Software Developer
Nexus Jobs
RM12, Hornchurch
From £50,000 to £70,000 per annum
Our Client is leader in the development of software for the financial sector. We are looking for a creative, detail-orientated Web Developer to join our Web Development team. You must have at least 5 years experience of working as a Fullstack Web Software Developer with C# Dot Net HTML and CSS. Within the Web Development team, you will have the opportunity to enjoy working with a range of web technology across the full stack. Our client base is growing and as part of this growth we are looking to improve and enhance our web-oriented product offerings. We are looking to recruit highly motivated and creative web developers who can be instrumental in delivering an ambitious digital roadmap. Ideally, we are looking for Web Developers with five plus years work experience. Additionally, candidates should be experienced in debugging and profiling applications associated with
Our Client is leader in the development of software for the financial sector. We are looking for a creative, detail-orientated Web Developer to join our Web Development team. You must have at least 5 years experience of working as a Fullstack Web Software Developer with C# Dot Net HTML and CSS. Within the Web Development team, you will have the opportunity to enjoy working with a range of web technology across the full stack. Our client base is growing and as part of this growth we are looking to improve and enhance our web-oriented product offerings. We are looking to recruit highly motivated and creative web developers who can be instrumental in delivering an ambitious digital roadmap. Ideally, we are looking for Web Developers with five plus years work experience. Additionally, candidates should be experienced in debugging and profiling applications associated with
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Proficient in hands-on development, coding, and API design.
Proficient in hands-on development, coding, and API design.
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Job title: Lead Integration Developer - Location: London, UK - Job type: Contract (Inside IR35) About the Role As a Lead Integration Developer, you will be responsible for designing, developing, and maintaining integration solutions across various platforms, including Guidewire InsuranceSuite and other core systems. You will lead a team of developers, collaborate with stakeholders, and ensure the delivery of integration projects that meet business and technical requirements. What will you do? * Lead the design and implementation of integration solutions using APIs, web services, and messaging systems. * Collaborate with business analysts and architects to define integration requirements and strategies. * Develop and maintain integration components using technologies such as Java, REST/JSON, XML, and Enterprise Messaging Systems.
Job title: Lead Integration Developer - Location: London, UK - Job type: Contract (Inside IR35) About the Role As a Lead Integration Developer, you will be responsible for designing, developing, and maintaining integration solutions across various platforms, including Guidewire InsuranceSuite and other core systems. You will lead a team of developers, collaborate with stakeholders, and ensure the delivery of integration projects that meet business and technical requirements. What will you do? * Lead the design and implementation of integration solutions using APIs, web services, and messaging systems. * Collaborate with business analysts and architects to define integration requirements and strategies. * Develop and maintain integration components using technologies such as Java, REST/JSON, XML, and Enterprise Messaging Systems.
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Power Platform Developer
Power Platform Developer
Cathcart Technology
London
£65000.00 - £72500.00 per annum + Bonus & Pension etc
A well-respected consultancy is looking for a talented Power Platform Developer to join their growing Digital Services team in London (hybrid). This is a great opportunity to work across multiple sectors ranging from finance all the way to health analytics where you'll be helping to design and deliver innovative digital solutions that make a real difference. This company is known for empowering its people to explore new technologies and shape how the business works. You'll be joining a supportive, collaborative environment and tight-knit team where your ideas will be valued and your work will have real visibility. The Role - You'll play a key part in designing, building and maintaining business applications, workflows and automations using the Microsoft Power Platform. You'll work with Power Apps, Power Automate, Power BI and Dataverse to deliver scalable, data-driven
A well-respected consultancy is looking for a talented Power Platform Developer to join their growing Digital Services team in London (hybrid). This is a great opportunity to work across multiple sectors ranging from finance all the way to health analytics where you'll be helping to design and deliver innovative digital solutions that make a real difference. This company is known for empowering its people to explore new technologies and shape how the business works. You'll be joining a supportive, collaborative environment and tight-knit team where your ideas will be valued and your work will have real visibility. The Role - You'll play a key part in designing, building and maintaining business applications, workflows and automations using the Microsoft Power Platform. You'll work with Power Apps, Power Automate, Power BI and Dataverse to deliver scalable, data-driven
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3 Days of work in the office - Job Summary * Migrate on-premise services to OCP in AWS. * Update pipelines to use in-house Trident solution. * Upgrade all components from Spring Boot 3.5 to 4. * Creation of new services or data sinks that are single responsibility and publish/consume from Kafka. * Service decommissions. * BAU work. Job Requirements * Java 17, 21 * Junit 5, Cucumber * Spring Boot 3, 4 * Tooling (Gradle, GitHub, Nexus, Artifactory, Sonar, Jacoco) * Kafka * Kubernetes, Helm * Databases (Preferably HBase, PostgreSQL) * Jenkins and CICD * Kafka Streams, Data sinks * OCP * RabbitMQ * Observability (Datadog, Grafana, Logging concepts and traces, Logback) * AWS * NoSQL datastores (Mongo, DynamoDB) * Security (Kerberos, JWT, Hashi Corp Vault, CVEs) * Design principles (Event Driven, testing, migrations, SOA, microservices, APIs)
3 Days of work in the office - Job Summary * Migrate on-premise services to OCP in AWS. * Update pipelines to use in-house Trident solution. * Upgrade all components from Spring Boot 3.5 to 4. * Creation of new services or data sinks that are single responsibility and publish/consume from Kafka. * Service decommissions. * BAU work. Job Requirements * Java 17, 21 * Junit 5, Cucumber * Spring Boot 3, 4 * Tooling (Gradle, GitHub, Nexus, Artifactory, Sonar, Jacoco) * Kafka * Kubernetes, Helm * Databases (Preferably HBase, PostgreSQL) * Jenkins and CICD * Kafka Streams, Data sinks * OCP * RabbitMQ * Observability (Datadog, Grafana, Logging concepts and traces, Logback) * AWS * NoSQL datastores (Mongo, DynamoDB) * Security (Kerberos, JWT, Hashi Corp Vault, CVEs) * Design principles (Event Driven, testing, migrations, SOA, microservices, APIs)
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Position: AI Engineer / AI Agent / Backend AI Engineer - Location: Remote - Work Type: Contract - We're looking for an AI Engineer to design and deliver scalable AI/ML systems and agentic applications. You'll work on LLMs, RAG pipelines, model deployment, and cloud-native solutions that drive real-world impact. * Strong coding skills in Java / TypeScript /Python * Experience with LLMs, NLP, and ML frameworks (Hugging Face, PyTorch, TensorFlow, LangChain) * Cloud & DevOps expertise (AWS/Azure, Docker, Kubernetes, CI/CD pipelines) * Knowledge of microservices, APIs, distributed systems - Why join us? * Work on cutting-edge AI innovation * Collaborative, cross-functional environment * Competitive salary + growth opportunities - We encourage you to apply or send me your updated resume to nandiraju . b @ randstad . co. uk
Position: AI Engineer / AI Agent / Backend AI Engineer - Location: Remote - Work Type: Contract - We're looking for an AI Engineer to design and deliver scalable AI/ML systems and agentic applications. You'll work on LLMs, RAG pipelines, model deployment, and cloud-native solutions that drive real-world impact. * Strong coding skills in Java / TypeScript /Python * Experience with LLMs, NLP, and ML frameworks (Hugging Face, PyTorch, TensorFlow, LangChain) * Cloud & DevOps expertise (AWS/Azure, Docker, Kubernetes, CI/CD pipelines) * Knowledge of microservices, APIs, distributed systems - Why join us? * Work on cutting-edge AI innovation * Collaborative, cross-functional environment * Competitive salary + growth opportunities - We encourage you to apply or send me your updated resume to nandiraju . b @ randstad . co. uk
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Backend Engineer - Scale Systems with Real Impact ?? Tired of tinkering at the edges? Want to actually shape the backbone of a platform that's transforming how the world's biggest enterprises run their tech? This is one of those rare roles where you get in early, build the foundations, and watch your work scale across global businesses. We're working with a high-growth London startup on a mission to reinvent enterprise software. Their AI-driven platform is already saving household-name customers millions in IT costs, shaving months off ERP project timelines, and making sense of the mess that legacy systems leave behind. SAP is just the beginning - they're building a whole new category of Enterprise System Intelligence. The Role * Build core systems capable of handling tens of millions of lines of code and large-scale LLM workloads.
Backend Engineer - Scale Systems with Real Impact ?? Tired of tinkering at the edges? Want to actually shape the backbone of a platform that's transforming how the world's biggest enterprises run their tech? This is one of those rare roles where you get in early, build the foundations, and watch your work scale across global businesses. We're working with a high-growth London startup on a mission to reinvent enterprise software. Their AI-driven platform is already saving household-name customers millions in IT costs, shaving months off ERP project timelines, and making sense of the mess that legacy systems leave behind. SAP is just the beginning - they're building a whole new category of Enterprise System Intelligence. The Role * Build core systems capable of handling tens of millions of lines of code and large-scale LLM workloads.
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What were looking for - Mercator is seeking a dynamic, forward-thinking? You will be open-minded, happy to work on your own or as part of a team and want to learn new technologies and promote best practice. Mercator Scala Developers work collaboratively in multidisciplinary agile scrum teams to develop, modify and maintain user interfaces for new digital services. Using agile methods, you will work closely with other members of the scrum team throughout the development cycle in order to design, build, test, maintain and support the new digital services. * Build, deploy and operate outstanding digital services within an agile environment that meet well defined user needs * Deliver application designs that meet web standards, ensuring that key elements are built in from the outset * Collaborate with design specialists to translate designs into high quality websites, app
What were looking for - Mercator is seeking a dynamic, forward-thinking? You will be open-minded, happy to work on your own or as part of a team and want to learn new technologies and promote best practice. Mercator Scala Developers work collaboratively in multidisciplinary agile scrum teams to develop, modify and maintain user interfaces for new digital services. Using agile methods, you will work closely with other members of the scrum team throughout the development cycle in order to design, build, test, maintain and support the new digital services. * Build, deploy and operate outstanding digital services within an agile environment that meet well defined user needs * Deliver application designs that meet web standards, ensuring that key elements are built in from the outset * Collaborate with design specialists to translate designs into high quality websites, app
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Our client, a well-known global brand, is seeking a Systems Analyst to join their IT Application Development Team based in London. This is a key role that will bridge the gap between business analysts and development teams, ensuring business requirements are translated into technically robust and user-focused solutions. * Collaborate with stakeholders to gather and analyse business requirements across internal systems. * Translate requirements into detailed backlog items and technical documentation. * Create wireframes, mock-ups, and prototypes using Figma to support development and stakeholder engagement. * Work closely with developers, testers, and product owners to enhance .NET-based systems and RESTful APIs. * Participate in Agile ceremonies including sprint planning, backlog grooming, and retrospectives. * Maintain documentation throughout the project lifecycle.
Our client, a well-known global brand, is seeking a Systems Analyst to join their IT Application Development Team based in London. This is a key role that will bridge the gap between business analysts and development teams, ensuring business requirements are translated into technically robust and user-focused solutions. * Collaborate with stakeholders to gather and analyse business requirements across internal systems. * Translate requirements into detailed backlog items and technical documentation. * Create wireframes, mock-ups, and prototypes using Figma to support development and stakeholder engagement. * Work closely with developers, testers, and product owners to enhance .NET-based systems and RESTful APIs. * Participate in Agile ceremonies including sprint planning, backlog grooming, and retrospectives. * Maintain documentation throughout the project lifecycle.
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We are looking for a motivated and detail-oriented Software Engineer to join our development team. You will have hands-on experience with Java development, Spring framework, relational databases, and a strong desire to grow their technical skills while contributing to Cegeka software solutions. Responsibilities * Design, develop, test, and maintain Java-based applications using the Spring framework. * Write efficient, reliable, and maintainable code that adheres to best practices. * Work with SQL databases (e.g., MySQL, PostgreSQL, Oracle) to design schemas, write queries, and optimise performance. * Collaborate with senior engineers to implement new features and fix bugs. * Participate in code reviews and contribute to improving coding standards. * Assist in troubleshooting, debugging, and performance tuning of applications.
We are looking for a motivated and detail-oriented Software Engineer to join our development team. You will have hands-on experience with Java development, Spring framework, relational databases, and a strong desire to grow their technical skills while contributing to Cegeka software solutions. Responsibilities * Design, develop, test, and maintain Java-based applications using the Spring framework. * Write efficient, reliable, and maintainable code that adheres to best practices. * Work with SQL databases (e.g., MySQL, PostgreSQL, Oracle) to design schemas, write queries, and optimise performance. * Collaborate with senior engineers to implement new features and fix bugs. * Participate in code reviews and contribute to improving coding standards. * Assist in troubleshooting, debugging, and performance tuning of applications.
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Requirement SAP BTP CPI Architect * Experience 14+ years * Location West London ( 3 days WFO ) * Build integration solutions using SAP BTP Integration Suite toconnect different systems smoothly. * Use Advanced Event Mesh to design real-time event-drivenintegrations. * Work with SAP Datasphere to manage and integrate dataeffectively. * Review functional specs and proposed integration solutions tomake sure theyll work well across platforms. * Partner with business and IT teams to turn their needs intopractical integration designs. * Keep security and compliance top of mind when setting up integration flows. * Guide best practices for APIs and integration patterns acrossprojects. * CI/CD approaches to automate deployment and testing ofintegration components. * Help and support other team members, and document your workso its easy to follow.
Requirement SAP BTP CPI Architect * Experience 14+ years * Location West London ( 3 days WFO ) * Build integration solutions using SAP BTP Integration Suite toconnect different systems smoothly. * Use Advanced Event Mesh to design real-time event-drivenintegrations. * Work with SAP Datasphere to manage and integrate dataeffectively. * Review functional specs and proposed integration solutions tomake sure theyll work well across platforms. * Partner with business and IT teams to turn their needs intopractical integration designs. * Keep security and compliance top of mind when setting up integration flows. * Guide best practices for APIs and integration patterns acrossprojects. * CI/CD approaches to automate deployment and testing ofintegration components. * Help and support other team members, and document your workso its easy to follow.
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Senior Data Engineer SQL BigQuery GCP
Senior Data Engineer SQL BigQuery GCP
Client Server
EC2A, City of London
£90000 - £110000 per annum + benefits
Are you a data technologist with Media Streaming experience? You could be progressing your career in a senor, hands-on role at one of Europe's most successful streaming and social media platforms. * Salary to £110k * Employee stock options plan * Flexible vacation and public holidays allowing you 35 days of annual leave * Creativity and Wellness package covering everything from gym memberships, photography, language courses, books * Professional development allowance covering things like books, conferences and training * Remote working most of the time if desired (x1 month in London) * A sociable office environment with free snacks, drinks and lunch if you are in the office - As a Senior Data Engineer you'll design, build and maintain high-performance services for content modelling, serving and integration, develop data pipelines (both batch and streaming) using cloud
Are you a data technologist with Media Streaming experience? You could be progressing your career in a senor, hands-on role at one of Europe's most successful streaming and social media platforms. * Salary to £110k * Employee stock options plan * Flexible vacation and public holidays allowing you 35 days of annual leave * Creativity and Wellness package covering everything from gym memberships, photography, language courses, books * Professional development allowance covering things like books, conferences and training * Remote working most of the time if desired (x1 month in London) * A sociable office environment with free snacks, drinks and lunch if you are in the office - As a Senior Data Engineer you'll design, build and maintain high-performance services for content modelling, serving and integration, develop data pipelines (both batch and streaming) using cloud
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Transaction Banking - Software Engineering - Analyst / Associate - London
Transaction Banking - Software Engineering - Analyst / Associate - London
Goldman Sachs
London
Competitive
At Goldman Sachs, our Engineers dont just make things we make things possible. Change the world by connecting people and capital with ideas. Solve the most challenging and pressing engineering problems for our clients. Join our engineering teams that build massively scalable software and systems, architect low latency infrastructure solutions, proactively guard against cyber threats, and leverage machine learning alongside financial engineering to continuously turn data into action. Create new businesses, transform finance, and explore a world of opportunity at the speed of markets. Goldman Sachs Engineers are innovators and problem-solvers, building solutions in risk management, big data, mobile and more. We look for creative collaborators who evolve, adapt to change and thrive in a fast-paced global environment. Want to push the limit of digital possibilities? Start
At Goldman Sachs, our Engineers dont just make things we make things possible. Change the world by connecting people and capital with ideas. Solve the most challenging and pressing engineering problems for our clients. Join our engineering teams that build massively scalable software and systems, architect low latency infrastructure solutions, proactively guard against cyber threats, and leverage machine learning alongside financial engineering to continuously turn data into action. Create new businesses, transform finance, and explore a world of opportunity at the speed of markets. Goldman Sachs Engineers are innovators and problem-solvers, building solutions in risk management, big data, mobile and more. We look for creative collaborators who evolve, adapt to change and thrive in a fast-paced global environment. Want to push the limit of digital possibilities? Start
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S/4 HANA Public Cloud Solution Architect
S/4 HANA Public Cloud Solution Architect
Stott & May Professional Search Limited
London
£650 - £750 per day
A leading consultancy are looking for an S/4 HANA Public Cloud Solution Architect for a long term engagement. As the S/4 HANA Public Cloud Solution Architect you will be working within the Architecture team to provide Architect services to the organisation's member across the world. Roles & Responsibilities * Analyse business requirements: Work with stakeholders to define and align business objectives with cloud migration goals. Act as a bridge between the business problem and the technical solution. * Design the solution architecture: Create a high-level technical blueprint, or solution architecture, to meet customer needs. This includes defining components and how data will flow between systems. * Plan for extensibility and integration: Design extensions and integrations using the SAP Business Technology Platform (SAP BTP) and APIs.
A leading consultancy are looking for an S/4 HANA Public Cloud Solution Architect for a long term engagement. As the S/4 HANA Public Cloud Solution Architect you will be working within the Architecture team to provide Architect services to the organisation's member across the world. Roles & Responsibilities * Analyse business requirements: Work with stakeholders to define and align business objectives with cloud migration goals. Act as a bridge between the business problem and the technical solution. * Design the solution architecture: Create a high-level technical blueprint, or solution architecture, to meet customer needs. This includes defining components and how data will flow between systems. * Plan for extensibility and integration: Design extensions and integrations using the SAP Business Technology Platform (SAP BTP) and APIs.
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