76 to 100 of 115 Permanent API Development Jobs

Senior Software Engineer

Hiring Organisation
Robert Walters
Location
Warwickshire, England, United Kingdom
Employment Type
Full-Time
Salary
Competitive salary
Collaborating with both in-house engineers and offshore partners to design, develop, and maintain a high-traffic systems.* Embedding AI capabilities throughout the software development process, utilising agentic coding techniques and tools such as CodeX or Claude to optimise workflows and product performance.* Making key architectural decisions that ensure … experience developing scalable web applications using React for frontend interfaces that support high-volume user interactions.* Extensive hands-on expertise with Node.js for backend API development, including integration with AWS cloud services for secure data management.* Demonstrated ability to embed AI capabilities into software products using agentic coding ...

Data Scientist

Hiring Organisation
Stackstudio Digital Ltd
Location
United Kingdom
Employment Type
Permanent
Bias etc. Implemented security best practices, Experience to address spikes and Denial of wallet attacks, DDoS attack and other Spike arrest strategies Knowledge of API Gateways and ISTIO, ability to Diagnose and intercept failures in End to End communication Hands-on Experience with API Development and Microservices ...

Senior Data Scientists/Data Engineers Needed (multiple Roles) - DV/SC Cleared

Hiring Organisation
Areti Group | B Corp™
Location
London Area, United Kingdom
science – scikit-learn, NumPy, matplotlib Relation database experience with data manipulation skills in SQL and large “Big Data” environments. Command knowledge in Python and API Development Excellent grasp of software Engineering practices – Object Orientated Programming, GIT, AWS) CI/CD practices NoSQL Databases Candidates must have security clearance ...

🌳🌳🌳Senior Data Scientists/Analysts - MOD, National Security, Defence, or Government🌳🌳🌳

Hiring Organisation
Areti Group | B Corp™
Location
United Kingdom
matplotlib) Experience in deep learning frameworks such as TensorFlow or PyTorch Knowledge of SQL and relational databases; experience with Big Data environments Familiarity with API development and NoSQL databases Understanding of CI/CD practices , AWS , and GIT Background in working to strict project deadlines Palantir experience ...

Lead Data Platform Engineer

Hiring Organisation
Harnham
Location
United Kingdom
with monitoring, logging and alerting solutions. • Ability to design, build and optimise cloud platform solutions. • Stakeholder management skills and confidence working across multiple teams. • API development experience. • Azure Data Factory knowledge is beneficial. What They Offer • Salary between £80,000 and £85,000 plus bonus. • Comprehensive benefits package ...

Lead Data Platform Engineer

Hiring Organisation
Harnham
Location
Edinburgh, Scotland, United Kingdom
with monitoring, logging and alerting solutions. • Ability to design, build and optimise cloud platform solutions. • Stakeholder management skills and confidence working across multiple teams. • API development experience. • Azure Data Factory knowledge is beneficial. What They Offer • Salary between £80,000 and £85,000 plus bonus. • Comprehensive benefits package ...

C# .NET Web Developer

Hiring Organisation
Interact Consulting Limited
Location
Milton Keynes, Buckinghamshire, South East, United Kingdom
Employment Type
Permanent, Work From Home
skills: Minimum 4 years' commercial C# .NET experience. Strong SQL/MySQL skills (including complex queries). Experience with VueJS and/or Angular. API development and third-party integrations. AWS experience. Desirable skills: AI integration experience (e.g. OpenAI). Use of AI tools (e.g. Claude) in development ...

Backend Engineer

Hiring Organisation
Big Red Recruitment
Location
Royal Leamington Spa, England, United Kingdom
will help design and build integrations between Shopify and a range of internal and third-party systems. The focus of the role is API development using Node.js and deployment to AWS. You will work across the full development lifecycle – from design through to deployment and ongoing improvement. ...

Software Engineer

Hiring Organisation
The Digital Bench Ltd
Location
Australia
Employment Type
Permanent
Software Engineer (Backend/Full Stack) – Move to Australia Location: Perth, Western Australia Salary: Competitive Skills: Java, .NET, Node.js, React, API, Microservices We’re partnering with organisations in Perth to deliver modern applications and digital platforms. Key Responsibilities: - Develop scalable backend and frontend systems - Build APIs and microservices - Support … digital transformation projects Key Skills: - Java, .NET or Node.js - React or modern frontend frameworks - API development Requirements: - Must be eligible to work in Australia Excellent opportunity for UK-based engineers considering relocation. ...

Senior AI Engineer

Hiring Organisation
HCLTech
Location
City of London, London, United Kingdom
architects and data teams, you will turn conceptual designs into robust, production-grade software using Amazon Bedrock and modern Python frameworks. Key Responsibilities · Agent Development: Build and deploy sophisticated AI agents using Python, LangChain, and LangGraph. Implement tool calling (function calling), memory persistence, and error-handling logic for robust …/CD pipelines for AI models and manage prompt versioning and evaluation metrics. Technical Skills & Requirements · Programming: Expert proficiency in Python (Pydantic, AsyncIO, API development with FastAPI/Flask). · AWS AI Stack: Hands-on experience with Amazon Bedrock APIs, SageMaker (Training Jobs, Inference Endpoints), and Vector Databases. ...

Full Stack Engineer (AI Startup)

Hiring Organisation
Oliver Bernard
Location
United Kingdom
performing international team Ideal Background – B2B SaaS experience and startup mindset – 6+ years full-stack experience, can build end-to-end features – Proven REST API development with Python – Strong React + TypeScript skills – Bonus: Production level LLM integration experience – Work independently in a small, senior team, shaping architecture ...

Laravel Developer

Hiring Organisation
Proactive Appointments
Location
Sheffield, Yorkshire, United Kingdom
Employment Type
Permanent
Salary
GBP Annual
VueJS framework and its ecosystem is highly desirable Competent with Git for source control. Understanding of MySQL, HTML, CSS, JavaScript Agile Methodologies Any RESTful API development useful Excellent Communication skills If this could be your next career move within an expanding employee-centric company, please drop across your ...

Asset Management Specialist

Hiring Organisation
SRMD Ltd
Location
United Kingdom
stakeholders to gather requirements and translate them into technical solutions Troubleshoot and resolve platform issues, ensuring optimal performance Required Skills: Strong experience in ServiceNow development and administration Hands-on expertise in ITSM, ITOM, HRSD, CMDB, Asset Management, PPM/SPM, and GRC modules Proficiency in JavaScript (ServiceNow scripting … good knowledge of Java Experience with databases like Oracle and MySQL Knowledge of REST/SOAP integrations and API development Strong problem-solving and communication skills ...

Full Stack Engineer

Hiring Organisation
Inara
Location
Leeds, England, United Kingdom
native platform within a secure, regulated environment . The Role You’ll be: Building backend services using C#/.NET Core Contributing to frontend development ( React or similar frameworks ) Working within a cloud-native Azure environment Collaborating with product, design, and engineering teams Supporting delivery within a client-facing … experience with C#/.NET Core Experience with modern frontend frameworks (React preferred) Experience working within Azure or cloud-native environments Solid understanding of API development and microservices Comfortable working in fast-paced, delivery-focused teams Active SC clearance OR eligible for SC clearance Why Join: Opportunity ...

Lead C# IoT & Cloud Software Engineer

Hiring Organisation
Jobleads-UK
Location
Oxford, England, United Kingdom
technology company in Oxford is seeking a Senior Software Engineer to lead the development of IoT device and cloud platform software. The role involves developing and maintaining C# codebases, API development, and collaboration with technical teams. Ideal candidates will have 8 years of C# experience, familiarity with ...

Senior Lead Analyst - Data Science - Machine Learning & Gen AI - UK

Hiring Organisation
Infosys
Location
Chester, England, United Kingdom
seeking a Senior AI/ML & Generative AI Engineer with deep expertise in designing, developing, and deploying advanced AI solutions. This includes core Python development using OOPs concepts, Large Language Models (LLMs), and Agentic AI architectures. The ideal candidate will collaborate with clients to understand complex business challenges, architect … Markets. Your Role As a Senior Lead Analyst, you will: •Anchor the engagement effort from business process consulting and problem definition to solution design, development, and deployment. •Lead the discovery and definition of AI/ML solutions and guide teams on project processes and deliverables. •Act as a thought ...

Hubspot Integration Specialist - Edinburgh/Hybrid/Remote Flex

Hiring Organisation
Lorien
Location
Edinburgh, Stockbridge, City of Edinburgh, United Kingdom
Employment Type
Permanent
Salary
£55000 - £65000/annum Hybrid, Remote, Progression, Trainin
ongoing supported opportunities for both upskilling and career progression, and a lot more. Role Snapshot: This post offers a great mix of CRM architecture, API development, strategic automation and systems thinking; ensuring seamless data flow, scalable automation and reliable system interoperability across the organisation's marketing, sales, customer … bring to the table: Demonstrable record of working with Hubspot in a technical hands-on capacity Strong understanding of Hubspot APIs and custom app development Track record of integrating SaaS platforms (CRM/ERP/marketing automation/billing tools/etc.) Hands-on skills across ...

Senior Backend Engineer

Hiring Organisation
CV Bay Ltd
Location
B2 4QA, Birmingham, West Midlands (County), United Kingdom
Employment Type
Permanent
Salary
£60000 - £70000/annum Up to £70,000 per annum
user interviews to understand real customer needs Make architecture and technical decisions, taking ownership of the solutions you build Requirements: Significant experience in backend API development (REST/JSON-RPC) Strong database design and architecture knowledge (SQL and/or NoSQL) Experience integrating third-party services, cloud platforms ...

AI Software Developer

Hiring Organisation
Thomas Professional
Location
Cirencester, Gloucestershire, England, United Kingdom
Employment Type
Full-Time
Salary
£50,000 - £75,000 per annum
experience writing high-quality Python in a commercial environment • Hands-on experience working with large language models (OpenAI, Anthropic, Mistral, or similar) • Familiarity with API development and modern software architecture • Understanding of prompt design and managing AI-generated outputs • Ideally have experience in RAG pipelines and vector databases ...

Software Engineering Lead

Hiring Organisation
VIQU IT Recruitment
Location
Northampton, Northamptonshire, UK
Employment Type
Full-time
pivotal point in their growth, having an influence over the technical strategy whilst remaining hands. Experience required: Strong background in modern .NET/C# development & architecture. A track record of leading and mentoring teams of engineers. Cloud experience across Azure & AWS. Experience with Angular framework, REST APIs … API development. Experience with testing frameworks and quality engineering practices (unit & integration testing and test driven development). SpecFlow for Behaviour-Driven Development and Postman for API testing. Experience building and maintaining CI/CD pipelines. Knowledge of Docker and containerised applications. Hands on experience with ...

Software Engineering Lead

Hiring Organisation
VIQU IT
Location
Milton Keynes, Fenny Stratford, Buckinghamshire, United Kingdom
Employment Type
Permanent
Salary
£80000 - £85000/annum
pivotal point in their growth, having an influence over the technical strategy whilst remaining hands. Experience required: Strong background in modern .NET/C# development & architecture. A track record of leading and mentoring teams of engineers. Cloud experience across Azure & AWS. Experience with Angular framework, REST APIs … API development. Experience with testing frameworks and quality engineering practices (unit & integration testing and test driven development). SpecFlow for Behaviour-Driven Development and Postman for API testing. Experience building and maintaining CI/CD pipelines. Knowledge of Docker and containerised applications. Hands on experience with ...

Senior Technical Lead (AI & Data Platform)

Hiring Organisation
Brightsmith
Location
Oxford, England, United Kingdom
Help shape the long-term engineering team and technical roadmap Experience Requires- Senior Technical Lead 5+ years software engineering experience Strong Python backend and API development Experience building production systems in startups or fast-moving environments Experience with data-heavy platforms or analytics products Interest in AI, modelling ...

C# Senior Software Developer

Hiring Organisation
Adria Solutions
Location
Manchester, United Kingdom
Employment Type
Permanent
Salary
GBP 75,000 Annual
lead projects, mentor junior developers, and work on high-impact, secure banking solutions. You will be a key contributor to web portal and API development, ensuring performance, security, and reliability in a dynamic environment click apply for full job details ...

Senior ML Systems Architect: Scalable AI Platform

Hiring Organisation
Jobleads-UK
Location
Bristol, England, United Kingdom
successful candidate will bridge research and commercial deployment, focusing on performance, reliability, and maintainability. Key qualifications include expertise in TensorFlow and Python, experience in API development, and familiarity with MLOps practices. Joining means working on cutting-edge ML solutions and collaborating with experts across various fields. #J ...

Senior Software & Data Engineer

Hiring Organisation
Adentis Portugal
Location
Lisboa, Portugal
Employment Type
Permanent
Salary
EUR Annual
routine; Health benefits (for you and your family); Team Building activities; Over 300 protocols to offer you great discounts in different areas; Continuous professional development sponsored by our Training and Certification Department; Regular feedback on your performance through a personalized plan; Comprehensive career plan and progression involving assertive performance … reviews. Responsibilities: Lead technical discussions and actively participate in development, with a particular focus on Spring Boot, Azure SQL, Azure DevOps, and Databricks/Scala/Spark. Support and drive architectural efforts, including High-Level Design (HLD) and Domain-Driven Design (DDD). Develop microservices, RESTful APIs, and ensure ...