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79 API jobs in Central London + 20 miles
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Senior Platform Engineer – Telephony / VoIP / Linux
Senior Platform Engineer – Telephony / VoIP / Linux
PiPcall
North London, London, N1 9AL
Up to £95,000 per annum
Are you a senior engineer who thrives on owning mission-critical platforms, solving complex real-time problems, and improving reliability at scale? PiPcall is looking for a Senior Platform Engineer to take technical ownership of our core telephony platform. This role is best suited to someone with strong Linux systems expertise, solid SIP / VoIP knowledge, and hands-on experience supporting production environments where performance, uptime, and troubleshooting depth really matter. Role snapshot: Senior Platform Engineer Telephony / VoIP / Linux | Full-time | Hybrid / Remote | Salary: Up to £95,000 per annum | Monday to Friday, 9:0018:00 - What Youll Be Doing - Own and continuously improve PiPcalls Linux-based telephony platform in production - Design, build, and support real-time voice services using FreeSWITCH and related SIP components
Are you a senior engineer who thrives on owning mission-critical platforms, solving complex real-time problems, and improving reliability at scale? PiPcall is looking for a Senior Platform Engineer to take technical ownership of our core telephony platform. This role is best suited to someone with strong Linux systems expertise, solid SIP / VoIP knowledge, and hands-on experience supporting production environments where performance, uptime, and troubleshooting depth really matter. Role snapshot: Senior Platform Engineer Telephony / VoIP / Linux | Full-time | Hybrid / Remote | Salary: Up to £95,000 per annum | Monday to Friday, 9:0018:00 - What Youll Be Doing - Own and continuously improve PiPcalls Linux-based telephony platform in production - Design, build, and support real-time voice services using FreeSWITCH and related SIP components
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ML Ops Engineer - Role Overview - Were hiring an ML Ops Engineer to own the reliability, scalability, and operational integrity of our machine-learning systems in research & production. This role sits at the intersection of data engineering and ML infrastructure: youll design and operate data pipelines that feed models, and youll build the tooling that trains, deploys, monitors, and retrains them. Youll work closely with research engineers and product teams, taking models from experimentation to production-grade systems with clear SLAs, reproducibility guarantees, and observable behaviour. This is not a research role; it is a hands-on engineering role focused on making ML systems work reliably at scale. What Youll Work On - ML lifecycle infrastructure * Productionizing models: packaging, deployment, versioning, and rollback * Designing CI/CD pipelines for ML (training ? validation ?
ML Ops Engineer - Role Overview - Were hiring an ML Ops Engineer to own the reliability, scalability, and operational integrity of our machine-learning systems in research & production. This role sits at the intersection of data engineering and ML infrastructure: youll design and operate data pipelines that feed models, and youll build the tooling that trains, deploys, monitors, and retrains them. Youll work closely with research engineers and product teams, taking models from experimentation to production-grade systems with clear SLAs, reproducibility guarantees, and observable behaviour. This is not a research role; it is a hands-on engineering role focused on making ML systems work reliably at scale. What Youll Work On - ML lifecycle infrastructure * Productionizing models: packaging, deployment, versioning, and rollback * Designing CI/CD pipelines for ML (training ? validation ?
FEATURED
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Location: London - Travel: Travel required several times per year (UK and international), sometimes at short notice and for up to 7 days - Security: Must be eligible to obtain and maintain UK security clearance to at least SC level - Hadean is an award-winning software company building software that enables real-time decision support, simulation, mission rehearsal and digital environments for the defence industry. Hadean is a deep-tech company building cutting-edge distributed computing technology that powers scalable, secure, and interoperable digital environments. Our platform enables real-time simulation and training, mission rehearsal, command & control and digital twin capabilitiestransforming the way defence, government agencies and enterprises plan, train, and make decisions. Hadeans solutions have helped organisations including the UK MoD, US DoW, BAE, Leidos, and more, ...
Location: London - Travel: Travel required several times per year (UK and international), sometimes at short notice and for up to 7 days - Security: Must be eligible to obtain and maintain UK security clearance to at least SC level - Hadean is an award-winning software company building software that enables real-time decision support, simulation, mission rehearsal and digital environments for the defence industry. Hadean is a deep-tech company building cutting-edge distributed computing technology that powers scalable, secure, and interoperable digital environments. Our platform enables real-time simulation and training, mission rehearsal, command & control and digital twin capabilitiestransforming the way defence, government agencies and enterprises plan, train, and make decisions. Hadeans solutions have helped organisations including the UK MoD, US DoW, BAE, Leidos, and more, ...
FEATURED
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UK / Hybrid / Remote?? £600 Inside IR35? 912 Month Contract - We are currently looking for an experienced Python Developer to join a growing engineering team. Youll be working on backend systems and scalable applications in a fast-moving environment. This is a hands-on role youll be expected to come in, get up to speed quickly, and own delivery. Key Responsibilities * Design and develop backend services using Python * Build and maintain REST APIs and microservices * Work with cloud platforms (AWS, Azure or GCP) * Collaborate with cross-functional teams * Contribute to system design, performance and scalability * Support CI/CD and DevOps practices - Key Skills & Experience * Strong commercial Python experience * Django, FastAPI or Flask * REST APIs and microservices * Cloud (AWS, Azure or GCP) * Docker / Kubernetes * SQL (PostgreSQL or similar) * Previous contract experience is a plus
UK / Hybrid / Remote?? £600 Inside IR35? 912 Month Contract - We are currently looking for an experienced Python Developer to join a growing engineering team. Youll be working on backend systems and scalable applications in a fast-moving environment. This is a hands-on role youll be expected to come in, get up to speed quickly, and own delivery. Key Responsibilities * Design and develop backend services using Python * Build and maintain REST APIs and microservices * Work with cloud platforms (AWS, Azure or GCP) * Collaborate with cross-functional teams * Contribute to system design, performance and scalability * Support CI/CD and DevOps practices - Key Skills & Experience * Strong commercial Python experience * Django, FastAPI or Flask * REST APIs and microservices * Cloud (AWS, Azure or GCP) * Docker / Kubernetes * SQL (PostgreSQL or similar) * Previous contract experience is a plus
An exciting Application Support Engineer role with a competitive salary plus bonus and career progression opportunities for a permanent role based in our Marylebone, London office. Were looking for an experienced Application Support Engineer to join our growing team at Euro Car Parks, a market-leading car park management technology and property company operating across the UK and Ireland. This is an office-based role at our Marylebone Head Office, working within our IT Development function to keep our business-critical applications running smoothly. Euro Car Parks is a market leading, renowned UK business, established over 50 years ago. The company operates over 3500 sites across the UK and Ireland providing specialist services to a wide range of blue-chip clients. Main Responsibilities - As an Application Support Engineer you will play a central role in the health, ...
An exciting Application Support Engineer role with a competitive salary plus bonus and career progression opportunities for a permanent role based in our Marylebone, London office. Were looking for an experienced Application Support Engineer to join our growing team at Euro Car Parks, a market-leading car park management technology and property company operating across the UK and Ireland. This is an office-based role at our Marylebone Head Office, working within our IT Development function to keep our business-critical applications running smoothly. Euro Car Parks is a market leading, renowned UK business, established over 50 years ago. The company operates over 3500 sites across the UK and Ireland providing specialist services to a wide range of blue-chip clients. Main Responsibilities - As an Application Support Engineer you will play a central role in the health, ...
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Next 11 Ventures is a UK-based software incubator created to build, scale and exit high-value software businesses. We operate as an active partner, not a passive holding entity, working hand-in-hand with founders and management teams to unlock growth. Currently Next11 Ventures is seeking a Full Stack Developer to support the development of a growing portfolio of software products focused on workforce, operational and AI-enabled systems. This is an opportunity to join a small, fast-moving team working across multiple live platforms, with direct involvement in both technical delivery and product development. You will work closely with founders and stakeholders to help design, build and improve applications used within recruitment, workforce management, compliance and operational environments. Key Responsibilities * Design and develop full-stack web applications
Next 11 Ventures is a UK-based software incubator created to build, scale and exit high-value software businesses. We operate as an active partner, not a passive holding entity, working hand-in-hand with founders and management teams to unlock growth. Currently Next11 Ventures is seeking a Full Stack Developer to support the development of a growing portfolio of software products focused on workforce, operational and AI-enabled systems. This is an opportunity to join a small, fast-moving team working across multiple live platforms, with direct involvement in both technical delivery and product development. You will work closely with founders and stakeholders to help design, build and improve applications used within recruitment, workforce management, compliance and operational environments. Key Responsibilities * Design and develop full-stack web applications
You will be an experienced Azure/Microsoft Fabric Data Engineer and will help design, build and maintain modern data platforms. The role will focus on Microsoft Fabric, Azure data services, Lakehouse architecture, data ingestion, transformation, modelling, governance and AI-ready analytics. Skills/Experience - Strong experience with Microsoft Azure data services and modern cloud data engineering. Hands-on experience with Microsoft Fabric, including Lakehouse, Warehouse, Pipelines, Dataflows, Notebooks and Power BI. Good understanding of data lake, lakehouse and warehouse architecture. Experience building data ingestion and transformation pipelines from multiple source systems. Strong SQL skills and experience working with relational data models. Experience with Python and/or PySpark for data transformation and automation.
You will be an experienced Azure/Microsoft Fabric Data Engineer and will help design, build and maintain modern data platforms. The role will focus on Microsoft Fabric, Azure data services, Lakehouse architecture, data ingestion, transformation, modelling, governance and AI-ready analytics. Skills/Experience - Strong experience with Microsoft Azure data services and modern cloud data engineering. Hands-on experience with Microsoft Fabric, including Lakehouse, Warehouse, Pipelines, Dataflows, Notebooks and Power BI. Good understanding of data lake, lakehouse and warehouse architecture. Experience building data ingestion and transformation pipelines from multiple source systems. Strong SQL skills and experience working with relational data models. Experience with Python and/or PySpark for data transformation and automation.
Senior Developer - Python, .NET, JavaScript / React - remote
Senior Developer - Python, .NET, JavaScript / React - remote
Initialize Ltd
City of London (EC1A)
Up to £80,000 per annum
Senior Developer - Python, .NET, JavaScript / React, Azure - remote - up to £80k - Skills/Experience * Proven experience as a senior developer, full-stack developer, software engineer or product engineer in a high-growth product, consultancy or customer delivery setting. * Expertise in Python, .NET and JavaScript/React, with a strong understanding of microservices, scalable APIs and modern application architecture. * Hands-on familiarity with Azure cloud computing, containerisation using Docker, orchestration using AKS, and deployment automation using GitHub, GitHub Actions and Bicep IaC. * Proficiency in Visual Studio Code, ideally with tools like GitHub Copilot or other AI-assisted development extensions. * An AI-native approach with proven experience or strong hands-on interest in Azure's AI stack, including Azure AI Foundry, Azure OpenAI, AI Search, agents and RAG ...
Senior Developer - Python, .NET, JavaScript / React, Azure - remote - up to £80k - Skills/Experience * Proven experience as a senior developer, full-stack developer, software engineer or product engineer in a high-growth product, consultancy or customer delivery setting. * Expertise in Python, .NET and JavaScript/React, with a strong understanding of microservices, scalable APIs and modern application architecture. * Hands-on familiarity with Azure cloud computing, containerisation using Docker, orchestration using AKS, and deployment automation using GitHub, GitHub Actions and Bicep IaC. * Proficiency in Visual Studio Code, ideally with tools like GitHub Copilot or other AI-assisted development extensions. * An AI-native approach with proven experience or strong hands-on interest in Azure's AI stack, including Azure AI Foundry, Azure OpenAI, AI Search, agents and RAG ...
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My Customer seeking an experienced Identity and Access Management (IdAM) Architect to lead the design, implementation, and enhancement of CyberArk Privileged Access Management (PAM) and identity governance solutions across a complex enterprise environment. The successful candidate will provide technical leadership throughout the project lifecycle, working closely with project, security, architecture, and operational teams to deliver secure and scalable identity services. * Extensive hands-on experience designing, deploying, and supporting CyberArk PAM solutions within large-scale enterprise environments. * Strong background in Identity and Access Management, including Privileged Access Management (PAM), Identity Governance and Administration (IGA), and Authentication, Authorisation and Accounting (AAA) frameworks.
My Customer seeking an experienced Identity and Access Management (IdAM) Architect to lead the design, implementation, and enhancement of CyberArk Privileged Access Management (PAM) and identity governance solutions across a complex enterprise environment. The successful candidate will provide technical leadership throughout the project lifecycle, working closely with project, security, architecture, and operational teams to deliver secure and scalable identity services. * Extensive hands-on experience designing, deploying, and supporting CyberArk PAM solutions within large-scale enterprise environments. * Strong background in Identity and Access Management, including Privileged Access Management (PAM), Identity Governance and Administration (IGA), and Authentication, Authorisation and Accounting (AAA) frameworks.
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Dynamics 365 CRM Omnichannel Technical Consultant / Developer
Dynamics 365 CRM Omnichannel Technical Consultant / Developer
Talent Locker
City of London (EC1)
£450 - £475 per day
Microsoft Dynamics 365 CRM Technical Consultant (omni channel / contact centre / Customer service) | Outside IR35 | £450-475 per day | Fully Remote | 6 Months initial contract - A large new Microsoft Dynamics 365 CRM project at a Microsoft Gold Partner requires a D365 CRM omnichannel technical consultant on an initial 6 month contract. If you are coming available and experienced with Microsoft dynamics 365 CRM Development (Customer service / contact centre), please apply. * Proven Dynamics 365 Customer Service & Omnichannel expertise - Customer Service Workspace, case management, SLAs, unified routing, and digital channels (chat, email, voice). * Strong Dynamics 365 CE development skills - hands-on C#/.NET plugins, JavaScript, customisations, integrations, and solution delivery. * Power Platform experience - Power Apps and Power Automate
Microsoft Dynamics 365 CRM Technical Consultant (omni channel / contact centre / Customer service) | Outside IR35 | £450-475 per day | Fully Remote | 6 Months initial contract - A large new Microsoft Dynamics 365 CRM project at a Microsoft Gold Partner requires a D365 CRM omnichannel technical consultant on an initial 6 month contract. If you are coming available and experienced with Microsoft dynamics 365 CRM Development (Customer service / contact centre), please apply. * Proven Dynamics 365 Customer Service & Omnichannel expertise - Customer Service Workspace, case management, SLAs, unified routing, and digital channels (chat, email, voice). * Strong Dynamics 365 CE development skills - hands-on C#/.NET plugins, JavaScript, customisations, integrations, and solution delivery. * Power Platform experience - Power Apps and Power Automate
NEWFEATURED
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API, integration and service design experience
API, integration and service design experience
NEW
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Deep understanding of API design, lifecycle management and monitoring.
Deep understanding of API design, lifecycle management and monitoring.
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Senior C# Developer (Azure)
Senior C# Developer (Azure)
Morson Edge
Turnford, Broxbourne (EN10), EN10 6AA
£50k - 60k per year + Excellent
You will work across a modern Azure environment, utilising technologies including C#, Azure Functions, Logic Apps, Service Bus, API Management, Key Vault, Storage Accounts, Front Door/Application Gateway, Infrastructure as Code, and CI/CD pipelines. You will have experience building Azure Logic Apps, workflows, connectors, and enterprise integrations, alongside a strong understanding of core Azure services including Service Bus, Key Vault, Storage, API Management, networking, and identity management.
You will work across a modern Azure environment, utilising technologies including C#, Azure Functions, Logic Apps, Service Bus, API Management, Key Vault, Storage Accounts, Front Door/Application Gateway, Infrastructure as Code, and CI/CD pipelines. You will have experience building Azure Logic Apps, workflows, connectors, and enterprise integrations, alongside a strong understanding of core Azure services including Service Bus, Key Vault, Storage, API Management, networking, and identity management.
PREMIUM
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API design and access
API design and access
FEATURED
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Software Engineer C# .Net - Sports Trading
Software Engineer C# .Net - Sports Trading
Client Server
The City, City of London (EC4), EC4R
£75000 - £90000 per annum + benefits
There's a focus on backend and API development although you'll also have elements of front end work with JavaScript and React.js.
There's a focus on backend and API development although you'll also have elements of front end work with JavaScript and React.js.
PREMIUM
C# .NET Core, REST API Design and Development, API Management
C# .NET Core, REST API Design and Development, API Management
Backend Software Engineer C# .Net - Sports Trading
Backend Software Engineer C# .Net - Sports Trading
Client Server
The City, City of London (EC4), EC4R
£100000 - £150000 per annum + bonus + benefits
There's a focus on backend and API development although you'll also have elements of front end work with JavaScript and React.js.
There's a focus on backend and API development although you'll also have elements of front end work with JavaScript and React.js.
NEWPREMIUM
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IT Development Team Lead (Full Stack)
IT Development Team Lead (Full Stack)
Euro Car Parks
Central London (W1)
£100,000 per annum plus commission
5+ years experience in working with the .NET framework, particularly with ASP.NET Core, React/React Native, C#, Web API * Experience developing REST API-driven mobile first web applications
5+ years experience in working with the .NET framework, particularly with ASP.NET Core, React/React Native, C#, Web API * Experience developing REST API-driven mobile first web applications
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Implementaion Engineer - SC Cleared
Implementaion Engineer - SC Cleared
Run-Time Group Ltd
Moorgate, City of London (EC2), EC2V 7HH
From £500 to £550 per annum
Design and implement a tenant-wide Microsoft Entra ID application registration pool (510 applications) to support parallelised Microsoft Graph API data collection and mitigate throttling.
Design and implement a tenant-wide Microsoft Entra ID application registration pool (510 applications) to support parallelised Microsoft Graph API data collection and mitigate throttling.
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API Gateway and CloudFront
API Gateway and CloudFront
Python Developer Backend (AI) - remote
Python Developer Backend (AI) - remote
Initialize Ltd
City of London (EC1)
Up to £60,000 per annum £40-60k + benefits
2+ years solid commercialPythoncoding experience (backend, API development would be great).
2+ years solid commercialPythoncoding experience (backend, API development would be great).
Developing and maintaining enterprise integration solutions using Software AG WebMethods components such as Integration Server, Universal Messaging, Trading Networks, API Gateway, MWS, and Optimize. * Designing and implementing integration architectures aligned with enterprise patterns, SOA, API management, and microservices. * Deep expertise in WebMethods development and architecture, with a strong focus on Integration Server and API Gateway. * Proven experience with Axway API Gateway and enterprise integration patterns.
Developing and maintaining enterprise integration solutions using Software AG WebMethods components such as Integration Server, Universal Messaging, Trading Networks, API Gateway, MWS, and Optimize. * Designing and implementing integration architectures aligned with enterprise patterns, SOA, API management, and microservices. * Deep expertise in WebMethods development and architecture, with a strong focus on Integration Server and API Gateway. * Proven experience with Axway API Gateway and enterprise integration patterns.
FEATURED
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Lead Solution Architect – Endur (ETRM Gas & Power Trading)
Lead Solution Architect – Endur (ETRM Gas & Power Trading)
BP Energy
St James, South West London (SW1), WC2N 5DU
Competitive
Design enterprise integration architecture, covering API management, event-driven patterns (Kafka, EventBridge), messaging (JMS, MQ), ETL/ELT pipelines, microservices and service mesh topologies. * Expert understanding of integration architecture in high-performance trading environments including messaging (JMS, MQ, Kafka), API design (REST, GraphQL, gRPC), event-driven patterns, ETL/ELT, real-time market data connectivity and STP workflows.
Design enterprise integration architecture, covering API management, event-driven patterns (Kafka, EventBridge), messaging (JMS, MQ), ETL/ELT pipelines, microservices and service mesh topologies. * Expert understanding of integration architecture in high-performance trading environments including messaging (JMS, MQ, Kafka), API design (REST, GraphQL, gRPC), event-driven patterns, ETL/ELT, real-time market data connectivity and STP workflows.
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Senior Data Scientist
Senior Data Scientist
Vitality Corporate Services Limited
Charing Cross, Central London (WC2), WC2R
£Competitive + Bonus + Benefits
Strong understanding of API development, microservices, and containerization (Docker, Kubernetes)
Strong understanding of API development, microservices, and containerization (Docker, Kubernetes)
PREMIUM
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Experience with streaming platforms (Kafka, EventHub) and API-based integration.
Experience with streaming platforms (Kafka, EventHub) and API-based integration.
FEATURED
Related Jobs
Locations
- Shoreditch
- St James
- The City, City (EC3)
- Winnersh
- Boyn Hill
- Moorgate
- The City, City (EC4)
- Camden
- Charing Cross
- Clay Hill
- City of London
- Cambridge
- Central London
- West End
- Reading
- East London
- South West London
- Uxbridge
- Farnborough
- Maidenhead
- London
- Berkshire
- Cambridgeshire
- Oxfordshire
- Hertfordshire
- Buckinghamshire
- Hampshire
- Surrey
- Essex
- East Sussex
- South East
- East Anglia
- East Midlands
- Midlands