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        • City of London

        95 Permanent API jobs in Hatfield + 20 miles

        297 exact matches jobs are outside your preferred location

        Senior Software Engineer

        Verifile Ltd
        Bedford, Bedfordshire, MK44 3JZ
        From £60,000 to £70,000 per annum Plus excellent benefits
        Strong software development skills across the stack using C#, ASP .NET, Blazor, API development, microservices, containers, and deployment pipelines.
        Strong software development skills across the stack using C#, ASP .NET, Blazor, API development, microservices, containers, and deployment pipelines.
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        NEWFEATURED
        Job Description Summary - Join us at GE Vernova Grid Software to be part of the team leading the digital transformation of the energy market. As the worlds energy sector moves away from fossil fuels toward renewable energy sources, industrial companies are challenged with addressing this transition in transformative ways. Digitization will be key to making power-generating assets more efficient and the electric grid more secure and resilient. Our Geospatial products play a critical role in this transformation by supporting the design, modelling and maintenance of electric, gas and telecommunication networks. For more information on our strategy, check out GridOS overview ( will be a part of our Grid Software Engineering team, an Agile organization with a flexible working environment, where we are always looking to innovate our products and the processes and technologi
        Job Description Summary - Join us at GE Vernova Grid Software to be part of the team leading the digital transformation of the energy market. As the worlds energy sector moves away from fossil fuels toward renewable energy sources, industrial companies are challenged with addressing this transition in transformative ways. Digitization will be key to making power-generating assets more efficient and the electric grid more secure and resilient. Our Geospatial products play a critical role in this transformation by supporting the design, modelling and maintenance of electric, gas and telecommunication networks. For more information on our strategy, check out GridOS overview ( will be a part of our Grid Software Engineering team, an Agile organization with a flexible working environment, where we are always looking to innovate our products and the processes and technologi
        more
        API Development & Maintenance (40%) Develop, test, and maintain backend services and APIs (primarily in Python with FastAPI) that serve our AI-driven features. * Developed and deployed a new API endpoint or microservice for an AI feature, using best practices and meeting quality standards. * API & Database Knowledge: Understanding of RESTful APIs and basic SQL/database concepts.
        API Development & Maintenance (40%) Develop, test, and maintain backend services and APIs (primarily in Python with FastAPI) that serve our AI-driven features. * Developed and deployed a new API endpoint or microservice for an AI feature, using best practices and meeting quality standards. * API & Database Knowledge: Understanding of RESTful APIs and basic SQL/database concepts.
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        You will lead the technical delivery of the clients Chat API, ensuring it is robust, scalable, and continuously improving. Lead the development and enhancement of the Chat API using Python, LangChain, and OpenAI services on Azure Function Apps - Monitor and resolve API bugs and performance issues to ensure high availability and reliability - Champion best practices in API development, documentation, and continuous improvement - Strong background in API design, monitoring, and performance optimisation
        You will lead the technical delivery of the clients Chat API, ensuring it is robust, scalable, and continuously improving. Lead the development and enhancement of the Chat API using Python, LangChain, and OpenAI services on Azure Function Apps - Monitor and resolve API bugs and performance issues to ensure high availability and reliability - Champion best practices in API development, documentation, and continuous improvement - Strong background in API design, monitoring, and performance optimisation
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        Product Owner

        GLOBAL MEDIA GROUP SERVICES LIMITED
        London
        Competitive
        Technical Acumen Conversant in LLM/RAG concepts, latencycost trade-offs, and API- vs UI-based product considerations.
        Technical Acumen Conversant in LLM/RAG concepts, latencycost trade-offs, and API- vs UI-based product considerations.
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        At Capgemini Invent, we believe difference drives change. As inventive transformation consultants, we blend our strategic, creative and scientific capabilities, collaborating closely with clients to deliver cutting-edge solutions. Join us to drive transformation tailored to our client's challenges of today and tomorrow. Informed and validated by science and data. Superpowered by creativity and design. All underpinned by technology created with purpose. Our C#/.NET Full Stack Engineers are responsible for creating the visions of our clients and driving better business outcomes. They are tasked with building cutting-edge digital solutions for our clients, combining a clear understanding of business value and a consultative approach to make the difference. They will be able to work on a vast variety of projects and get exposure to a variety of technology such as (but not
        At Capgemini Invent, we believe difference drives change. As inventive transformation consultants, we blend our strategic, creative and scientific capabilities, collaborating closely with clients to deliver cutting-edge solutions. Join us to drive transformation tailored to our client's challenges of today and tomorrow. Informed and validated by science and data. Superpowered by creativity and design. All underpinned by technology created with purpose. Our C#/.NET Full Stack Engineers are responsible for creating the visions of our clients and driving better business outcomes. They are tasked with building cutting-edge digital solutions for our clients, combining a clear understanding of business value and a consultative approach to make the difference. They will be able to work on a vast variety of projects and get exposure to a variety of technology such as (but not
        more
        Our current stack includes Python, Django, Typescript, React, React Native, Next.js, and AWS serverless technologies (Lambda, S3, DynamoDB, API Gateway, SNS/SQS).
        Our current stack includes Python, Django, Typescript, React, React Native, Next.js, and AWS serverless technologies (Lambda, S3, DynamoDB, API Gateway, SNS/SQS).
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        London, United Kingdom - Customer Success / Full-Time / Hybrid - Apply for this job - Before jumping in on all the information about the role and what you can bring to the table, let us introduce ourselves real quick. About us - We are Insider, a B2B SaaS company that drives growth for its clients around the world. How are we achieving this? We are the #1 AI-native platform for Customer Experience and Marketing-offers marketers a single platform to deliver unique experiences per person, drive profitable growth, and unleash peak productivity and efficiency. Our platform connects data across channels, predicts future behavior with AI, and individualizes experiences from a single platform. We have just celebrated our $500M Series E funding round, led by General Atlantic . Before this, we've unlocked unicorn status following our Series D round.
        London, United Kingdom - Customer Success / Full-Time / Hybrid - Apply for this job - Before jumping in on all the information about the role and what you can bring to the table, let us introduce ourselves real quick. About us - We are Insider, a B2B SaaS company that drives growth for its clients around the world. How are we achieving this? We are the #1 AI-native platform for Customer Experience and Marketing-offers marketers a single platform to deliver unique experiences per person, drive profitable growth, and unleash peak productivity and efficiency. Our platform connects data across channels, predicts future behavior with AI, and individualizes experiences from a single platform. We have just celebrated our $500M Series E funding round, led by General Atlantic . Before this, we've unlocked unicorn status following our Series D round.
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        Own and organise local training programs on the various clusters to help capability to upsell; collection accounts, API integration, Playbook hedging programs etc..
        Own and organise local training programs on the various clusters to help capability to upsell; collection accounts, API integration, Playbook hedging programs etc..
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        Frequently Asked Questions

        How many permanent API jobs are there in Hatfield?
        There are 95 permanent API jobs within 20 miles of Hatfield available on CWJobs right now.

        What other similar jobs are there to permanent API jobs in Hatfield?
        As well as permanent API jobs in Hatfield, you can find permanent IT, Software Development, Management, amongst many others.