Date posted
Commute time
Locations
Type of Company
Job types
Salaries
Locations
Locations
Popular searches nearby
Other popular locations
Salaries
Date posted
Type of Company
Job types
74 Permanent API jobs in South East London + 20 miles
215 exact matches jobs are outside your preferred location
The LSEG DevSecOps Engineering team inside the cyber security division is looking for Senior Software Engineers to build tools and automations to help secure software development for thousands of developers across the group. You will be working as part of a geographically distributed remote team comprising of security engineers and software engineers. Our teams mission is to allow engineers to embed security best practices frictionlessly as part of their day to day work. * Deep understanding of cyber security principles, secure software development, and threat modeling * Experience conducting security assessments, code reviews, and vulnerability management across diverse technology stacks * Experience in building full-stack products (web applications, APIs, CI tooling or low-level software) * Hands-on experience with cloud technologies (AWS, GCP, Azure) and containers
The LSEG DevSecOps Engineering team inside the cyber security division is looking for Senior Software Engineers to build tools and automations to help secure software development for thousands of developers across the group. You will be working as part of a geographically distributed remote team comprising of security engineers and software engineers. Our teams mission is to allow engineers to embed security best practices frictionlessly as part of their day to day work. * Deep understanding of cyber security principles, secure software development, and threat modeling * Experience conducting security assessments, code reviews, and vulnerability management across diverse technology stacks * Experience in building full-stack products (web applications, APIs, CI tooling or low-level software) * Hands-on experience with cloud technologies (AWS, GCP, Azure) and containers
FTSE Russell is a leading global provider of financial services, specializing in the creation and management of indexes, data, and analytic solutions. A subsidiary of the London Stock Exchange Group (LSEG), FTSE Russell supports investors worldwide in making informed decisions across asset classes, investment strategies, and market segments. Its products are trusted by institutional and retail investors, asset managers, and pension funds to benchmark performance, build investment portfolios, and manage risk. With a reputation for innovation, transparency, and robust governance, FTSE Russell plays a critical role in shaping global financial markets. FTSE Russell is seeking a hands-on dynamic software development leader to drive a team of software engineers building robust equity index capabilities and indexes.
FTSE Russell is a leading global provider of financial services, specializing in the creation and management of indexes, data, and analytic solutions. A subsidiary of the London Stock Exchange Group (LSEG), FTSE Russell supports investors worldwide in making informed decisions across asset classes, investment strategies, and market segments. Its products are trusted by institutional and retail investors, asset managers, and pension funds to benchmark performance, build investment portfolios, and manage risk. With a reputation for innovation, transparency, and robust governance, FTSE Russell plays a critical role in shaping global financial markets. FTSE Russell is seeking a hands-on dynamic software development leader to drive a team of software engineers building robust equity index capabilities and indexes.
Role Summary - LSEGs ambition is to be one of the worlds greatest companies and best places to work. To achieve this, we are on a journey of building a world class engineering function supporting our Customer Data Master (CDM) Platform team. The team has embarked on a journey to provide internal teams and platform teams with a fully managed customer data master platform. The role will take part in the definition of the CDM strategy and execution of the CDM engineering strategy and deliver the technology capability, in line with the Corporate Engineering (CE) strategy which includes evolving our current master data capability. What youll be doing * Lead and scale a senior engineering team (currently 5, growing to ~10) to design, build and operate the MDM , CDM and Customer 360 platforms as a product, with clear ownership, measurable outcomes, and a roadmap aligned to b
Role Summary - LSEGs ambition is to be one of the worlds greatest companies and best places to work. To achieve this, we are on a journey of building a world class engineering function supporting our Customer Data Master (CDM) Platform team. The team has embarked on a journey to provide internal teams and platform teams with a fully managed customer data master platform. The role will take part in the definition of the CDM strategy and execution of the CDM engineering strategy and deliver the technology capability, in line with the Corporate Engineering (CE) strategy which includes evolving our current master data capability. What youll be doing * Lead and scale a senior engineering team (currently 5, growing to ~10) to design, build and operate the MDM , CDM and Customer 360 platforms as a product, with clear ownership, measurable outcomes, and a roadmap aligned to b
)
££60,000 - £110,000 GBP + Package - Hybrid WORKING - Location: London;Cheltenham;Bournemouth, Central London, Greater London - United Kingdom Type: Permanent - Location: Cheltenham, London, Bournemouth - Consultative travel required - Clearance: Must be a sole British National, elligable or holding SC or DV - Salary: £60,000 - £110,000 (Depandant on grade) A leading digital consultancy is looking for a Senior Data Scientist to lead and deliver cutting-edge AI/ML solutions for clients across UK defence and public sector. This is a hands-on, strategic position for someone who thrives at the intersection of data science, client delivery, and software product design. What You'll Be Doing * Lead technical project delivery and shape data science strategy across multiple client engagements * Define and implement bespoke machine learning algorithms to solve real-world defence
££60,000 - £110,000 GBP + Package - Hybrid WORKING - Location: London;Cheltenham;Bournemouth, Central London, Greater London - United Kingdom Type: Permanent - Location: Cheltenham, London, Bournemouth - Consultative travel required - Clearance: Must be a sole British National, elligable or holding SC or DV - Salary: £60,000 - £110,000 (Depandant on grade) A leading digital consultancy is looking for a Senior Data Scientist to lead and deliver cutting-edge AI/ML solutions for clients across UK defence and public sector. This is a hands-on, strategic position for someone who thrives at the intersection of data science, client delivery, and software product design. What You'll Be Doing * Lead technical project delivery and shape data science strategy across multiple client engagements * Define and implement bespoke machine learning algorithms to solve real-world defence
PREMIUM
)
Sanderson are working closely with a SME based in the London who are looking to grow their Java Developer capability. The company are looking to modernise how organisations manage and derive data. They are fast growing and looking for dynamics people to help them grow the business and capability. * Strong experience in Java software engineering. Experience with Spring Boot, REST APIs, and microservice architectures * Knowledge of Docker and Kubernetes for containerisation * Exposure to cloud platforms such as AWS - This role will require eligibility to be clearable to SC level. If you're interested in the above, apply or reach out to - Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built, and we welcome applications from people of all backgrounds and perspectives.
Sanderson are working closely with a SME based in the London who are looking to grow their Java Developer capability. The company are looking to modernise how organisations manage and derive data. They are fast growing and looking for dynamics people to help them grow the business and capability. * Strong experience in Java software engineering. Experience with Spring Boot, REST APIs, and microservice architectures * Knowledge of Docker and Kubernetes for containerisation * Exposure to cloud platforms such as AWS - This role will require eligibility to be clearable to SC level. If you're interested in the above, apply or reach out to - Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built, and we welcome applications from people of all backgrounds and perspectives.
FEATURED
Job Role: AI Engineer - Working Model: Permanent - Location: Hybrid - London - Salary: Up to £80,000 + Benefits - Are you a hands-on AI engineer looking to build, deploy, and optimize AI-driven solutions? Do you want to work with Generative AI, LLMs, and cloud deployments in a collaborative, fast-moving environment? This is an exciting opportunity to join a growing AI team, contribute to cutting-edge projects, and develop your skills with mentorship from senior engineers. You'll work on AI-powered applications, RAG pipelines, and model fine-tuning, solving real business problems. About the Role * Design, implement, and fine-tune LLMs and generative AI solutions (OpenAI, Anthropic Claude, Gemini, open-source models) * Build and optimize RAG pipelines, vector databases, and prompt engineering strategies * Develop AI-powered applications integrating LLMs with APIs, agent
Job Role: AI Engineer - Working Model: Permanent - Location: Hybrid - London - Salary: Up to £80,000 + Benefits - Are you a hands-on AI engineer looking to build, deploy, and optimize AI-driven solutions? Do you want to work with Generative AI, LLMs, and cloud deployments in a collaborative, fast-moving environment? This is an exciting opportunity to join a growing AI team, contribute to cutting-edge projects, and develop your skills with mentorship from senior engineers. You'll work on AI-powered applications, RAG pipelines, and model fine-tuning, solving real business problems. About the Role * Design, implement, and fine-tune LLMs and generative AI solutions (OpenAI, Anthropic Claude, Gemini, open-source models) * Build and optimize RAG pipelines, vector databases, and prompt engineering strategies * Develop AI-powered applications integrating LLMs with APIs, agent
FEATURED
Job Role: AI Lead - Working Model: Permanent - Location: Hybrid - London - Salary: up to £100,000 - Are you a hands-on AI Lead passionate about Generative AI, LLMs, and cloud deployments? Do you enjoy designing, developing, and deploying AI-driven solutions that solve real business problems? This is an exciting opportunity to join a dynamic AI team and contribute to cutting-edge projects in Insurtech and Fintech. You'll work closely with cross-functional teams to build scalable AI applications, fine-tune LLMs, and integrate AI capabilities across platforms. About the Role * Lead the design, implementation, and fine-tuning of LLMs and generative AI solutions (OpenAI, Anthropic Claude, Gemini, open-source models). * Build and optimize RAG pipelines, vector databases, and prompt engineering strategies. * Develop AI-powered applications integrating LLMs with APIs, agents,
Job Role: AI Lead - Working Model: Permanent - Location: Hybrid - London - Salary: up to £100,000 - Are you a hands-on AI Lead passionate about Generative AI, LLMs, and cloud deployments? Do you enjoy designing, developing, and deploying AI-driven solutions that solve real business problems? This is an exciting opportunity to join a dynamic AI team and contribute to cutting-edge projects in Insurtech and Fintech. You'll work closely with cross-functional teams to build scalable AI applications, fine-tune LLMs, and integrate AI capabilities across platforms. About the Role * Lead the design, implementation, and fine-tuning of LLMs and generative AI solutions (OpenAI, Anthropic Claude, Gemini, open-source models). * Build and optimize RAG pipelines, vector databases, and prompt engineering strategies. * Develop AI-powered applications integrating LLMs with APIs, agents,
FEATURED
)
The successful applicant will have comprehensive expertise in Microsoft Azure services, Web API, Azure App Service, .NET Core, and Visual Studio. * Design and implement scalable cloud solutions utilizing Azure App Service, Web API, and .NET Core. * Define architecture patterns for microservices, API management, and integration with enterprise systems. * Utilize Azure Functions, Azure Logic Apps, Azure API Management, and Azure Storage to develop robust applications. * Expertise in Microsoft Azure services, including App Service, Functions, API Management, Storage, and Networking. * Strong knowledge of .NET Core, Web API, C#, and Visual Studio.
The successful applicant will have comprehensive expertise in Microsoft Azure services, Web API, Azure App Service, .NET Core, and Visual Studio. * Design and implement scalable cloud solutions utilizing Azure App Service, Web API, and .NET Core. * Define architecture patterns for microservices, API management, and integration with enterprise systems. * Utilize Azure Functions, Azure Logic Apps, Azure API Management, and Azure Storage to develop robust applications. * Expertise in Microsoft Azure services, including App Service, Functions, API Management, Storage, and Networking. * Strong knowledge of .NET Core, Web API, C#, and Visual Studio.
)
Software Developer (.Net)
Software Developer (.Net)
Spectrum It Recruitment Limited
Reading (RG1)
£50000 - £60000 per annum + Benefits & Progression
API Development
API Development
The Service is one of the fastest growing streams in the LCH business lines and is looking to build on recent successes and further increase market share through modernising and enhancing our external facing application and API by delivering powerful and scalable functionality to meet evolving market demands.
The Service is one of the fastest growing streams in the LCH business lines and is looking to build on recent successes and further increase market share through modernising and enhancing our external facing application and API by delivering powerful and scalable functionality to meet evolving market demands.
)
Expertise in system and API design, scalability, and performance tuning
Expertise in system and API design, scalability, and performance tuning
)
Senior Frontend Developer
Senior Frontend Developer
Pathfinder Business Solutions Ltd
Milton Keynes (MK9), MK9 3QA
From £50,000 to £60,000 per annum Full Benefits Pack
REST-based API development
REST-based API development
)
Experience building maintainable and testable code bases, including API design and unit testing techniques
Experience building maintainable and testable code bases, including API design and unit testing techniques
)
Integration & API Testing - proficiency with REST/OData service testing using tools like Postman or SoapUI
Integration & API Testing - proficiency with REST/OData service testing using tools like Postman or SoapUI
Build, fine-tune, and evaluate LLM-based Q&A models using frameworks like AWS Bedrock, Langchain, HuggingFace Transformers or OpenAI API.
Build, fine-tune, and evaluate LLM-based Q&A models using frameworks like AWS Bedrock, Langchain, HuggingFace Transformers or OpenAI API.
)
Understanding of cloud architectures, API-driven platforms, and financial data security standards.
Understanding of cloud architectures, API-driven platforms, and financial data security standards.
Experience building maintainable and testable code bases, including API design and unit testing techniques
Experience building maintainable and testable code bases, including API design and unit testing techniques
Experience building maintainable and testable code bases, including API design and unit testing techniques
Experience building maintainable and testable code bases, including API design and unit testing techniques
Microservices architecture, API-first approach, containerisation (Docker/Kubernetes), CI/CD pipelines * Knowledge of integration patterns, API gateways, and cloud-native deployments
Microservices architecture, API-first approach, containerisation (Docker/Kubernetes), CI/CD pipelines * Knowledge of integration patterns, API gateways, and cloud-native deployments
Experience building maintainable and testable code bases, including API design and unit testing techniques
Experience building maintainable and testable code bases, including API design and unit testing techniques
API Management gateways
API Management gateways
)
Data exchange and processing skills (e.g. ETL, ESB, API...)
Data exchange and processing skills (e.g. ETL, ESB, API...)
FEATURED
Design, develop, and deliver custom solutions within Planon's API framework.
Design, develop, and deliver custom solutions within Planon's API framework.
FEATURED
Design, develop, and deliver custom solutions within Planon's API framework.
Design, develop, and deliver custom solutions within Planon's API framework.
FEATURED
)
Infrastructure: AWS (Aurora, Redis, DynamoDB, S3, SNS, SQS, CloudFront, API Gateway)
Infrastructure: AWS (Aurora, Redis, DynamoDB, S3, SNS, SQS, CloudFront, API Gateway)