21 of 21 Permanent API Development Jobs in London

though also like the idea of the equally important social/client-facing aspect of the role. The role is responsible for defining the development architecture across a blend of in-house bespoke solutions and 3rdparty products and helping to shape the longer-term strategic development architecture … developing architecture strategy and target architecture model. You will be working closely with delivery team members to coach and promote best-practice solution development architecture as well as supporting business analysts and product owners in planning and story-mapping for new development. You will act as technical design authority ...

experience in Node.js , C#/.NET Core , and Vue 3 . You’re well-versed in cloud platforms ( Google Cloud is essential ), have strong API development skills, and are experienced with payment platform integrations (e.g., Stripe , PayPal ). Experience with multi-tenant platforms is a must Your Role …/.NET Core , and Vue 3 . Strong experience in cloud platforms , preferably Google Cloud (AWS/Azure experience is welcomed). Expertise in API development and experience with payment platform integrations (e.g., Stripe , PayPal ). Solid understanding of cloud-native architecture and scalability . Experience with building ...

tools, scripts, and benchmarks to automate AI/ML security testing Perform secure code reviews and penetration testing of AI-related software Research and Development Research emerging threats, trends, and best practices in AI/ML security Deliver proof-of-concepts and proof-of-value initiatives to assess … technologies and controls Contribute to the development of advanced AI/ML security tools and techniques Produce high-quality technical documentation and user guidance Security Engineering and Collaboration Provide subject matter expertise on security engineering patterns and controls Support secure software development practices aligned to OWASP and DevSecOps ...

Implementing CI/CD pipelines (GitHub Actions, GitLab, Jenkins, ArgoCD) • Shipping production-grade cloud-native applications 🎯 What We’re Looking For 👉 Strong Python backend development experience 👉 API development (FastAPI highly desirable) 👉 Solid SQL/PostgreSQL knowledge 👉 AWS experience (EKS ideal) 👉 Kubernetes deployment experience 👉 Terraform (Infrastructure as Code ...

Implementing CI/CD pipelines (GitHub Actions, GitLab, Jenkins, ArgoCD) • Shipping production-grade cloud-native applications 🎯 𝗪𝗵𝗮𝘁 𝗪𝗲’𝗿𝗲 𝗟𝗼𝗼𝗸𝗶𝗻𝗴 𝗙𝗼𝗿 👉 Strong Python backend development experience 👉 API development (FastAPI highly desirable) 👉 Solid SQL/PostgreSQL knowledge 👉 AWS experience (EKS ideal) 👉 Kubernetes deployment experience 👉 Terraform (Infrastructure as Code ...

procedures and to modernise systems and practices so that they can deliver quality at pace. Currently the team are transitioning from traditional software application development using C#, Blazer and SQL Server integrating with Dynamics Business Central, and the Data team provide analytics and insights using SAS, MicroStrategy and Power … Engineers, an Automation Tester, Scrum Master, DevOps, Infra Engineers and Service Desk Team. You need to have experience of leading end to end software development including design, build, testing, deployment and support. The Service Desk team need to work closely with the build and deployment resources so that they ...

React, Node.js, Terraform or Celery Strong database design and optimisation experience If you’re a Senior Engineer looking for a role combining hands-on development, technical ownership, and real-world impact, this is worth a conversation. Hit apply today! Keywords Senior Software Engineer, Python Developer, Django, Flask, JavaScript, TypeScript … React, Node.js, AWS, Azure, GCP, Cloud Engineer, Backend Developer, Full Stack Developer, Microservices, API Development, CI/CD, DevOps, Terraform, Celery, Data Engineering, Renewable Energy Tech, Technical Leadership, Software Architecture, Scalable Systems, Leeds Jobs, London Jobs, Hybrid Jobs, Tech Jobs ...

financial markets environment. This is a true player-coach role - leading a high-performing Agile team while remaining actively involved in architecture, design, and development of distributed, cloud-native systems supporting Rates & FX platforms. Key Skills Required: Strong C#/.NET Core expertise Experience with distributed, event-driven, cloud … native architectures REST/GraphQL API development AWS or Azure cloud deployment Relational databases (MSSQL/MySQL) Proven experience leading engineering teams in Agile environments Exposure to trading systems, FIX protocol, WPF, microservices, or serverless architecture is highly desirable. If you're a delivery-focused technical leader ...

value autonomy, speed, and impact. Stack: Build with modern tools — Python, FastAPI, TypeScript, LLMs, MLOps What We’re Looking For 2+ years of software development experience Proven track record of building and shipping full-stack products in fast-paced, product-driven teams Hands-on experience building production AI systems … etc.), integrated into real user workflows Familiarity with MLOps tools and CI/CD for both traditional and ML-driven systems Strong backend and API development skills - comfortable owning systems end-to-end, from data pipelines to user-facing interfaces Passion for building clean, usable products that solve ...

pipelines supporting real-time and batch processing for AI agents. Contribute to the technical implementation of agent systems using frameworks such as Google AI Development Kit (ADK) or comparable technologies. Develop and maintain client libraries for secure collaboration between data systems, agents, and internal platforms. Implement data-centric agent … patterns and integrate agents with existing enterprise systems. Conduct continuous testing and validation of data integrations and pipelines throughout the development lifecycle. Incorporate feedback loops to ensure data quality, system reliability, and operational scalability. Professional Experience 5–7 years of experience as a Software Engineer or Data Engineer. Minimum ...

Senior Backend Engineer/Head of Backend Development (Python/AWS) Fintech | NYC (Remote) | No C2C | Full-time role Compensation : £100,000–£160,000 (negotiable for star talent upon tech test) We are working with a well-funded fintech platform transforming how complex financial data flows across global markets. … tier-one financial institutions. You will primarily work in Python and AWS, building robust APIs and scalable data pipelines. This is not simply CRUD API development; it involves architecting high-trust systems with strong multi-tenant boundaries, regional data controls, and secure cloud infrastructure. The process includes ...

earning substantial bonuses. What's in it for you: Salary to £90k Bonus paid every six months based on personal performance (10-25%) Professional development Pension Health Insurance Gym membership Social events, free fruit, snacks, coffee etc. Your role: As a Software Engineer within the trading engine team … team on Greenfield projects which you'll take ownership of and will see the business impact of. There's a focus on backend and API development although you'll also have elements of front end work with JavaScript and React.js. Location: You'll be based in plush City ...

unlock new revenue streams. 💻 The Role You’ll play a key part in building and scaling a modern fintech platform, working across: Backend: Node.js (API development & scalable services) Frontend: React Native (iOS & Android apps) Database: MongoDB CI/CD, Git, and clean coding best practices You’ll collaborate ...

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 ...

consultancies is helpful — but not required. Nice to Have (Not Required) Experience with tools like Databricks, dbt, Airflow , or similar platforms Some exposure to API development or backend systems Experience integrating enterprise systems (ERP, CRM, operational platforms) Familiarity with dashboards or data visualisation tools Exposure to AI-enabled ...

agents, automate complex workflows, and extract value from structured and unstructured data at scale. This role sits at the intersection of AI engineering, software development, and applied machine learning , working closely with product, platform, and data teams. Key Responsibilities Design, build, and deploy agentic AI systems and intelligent workflows … architecture decisions, performance optimisation, and AI system monitoring Required Skills & Experience Bachelor's degree or higher in a relevant STEM discipline. Strong Python development skills for AI/ML and backend services Hands-on experience with agentic AI architectures and autonomous workflows Practical experience with AI orchestration frameworks (e.g. ...

experience leading engineering teams in an Agile environment Strong expertise in C# and modern .NET/.NET Core Experience building distributed, event-driven systems API design and development (REST, GraphQL) Relational databases (SQL Server, MySQL, or similar) Cloud platforms such as AWS or Azure Solid understanding … full software development lifecycle Pragmatic, delivery-focused approach with strong communication skills Location & Package Location: London Working Pattern: Hybrid - 3 days per week in the office Salary: Up to £125,000 base + bonus and benefits McGregor Boyall is an equal opportunity employer and do not discriminate ...

data pipelines to feed real time trading and research systems. Implement data quality checks, anomaly detection and monitoring frameworks. Build and maintain high performance API's to expose market and reference data to trading, research and analytics platforms. Who you are: 3+ years in Data Engineering … performance, time sensitive environments. Strong Python proficiency, including exposure to libraries such as Pandas, Arrow, and Spark. Strong grasp of data modelling, normalization and API development for large scale analytical or trading systems. Experience with lakehouse architectures (Databricks ideally, or Delta Lake). Exposure to real time ...

Dynamics 365 Senior Developer - London OverviewWe are seeking an experienced Dynamics 365 Senior Developer to lead the design, development, and delivery of Microsoft Dynamics 365 solutions. This London-based role is ideal for someone with strong technical expertise and excellent collaboration skills, working closely with stakeholders, architects, and functional … customise Dynamics 365 CE/CRM solutions.* Build and maintain plugins, workflows, custom actions, JavaScript, Power Automate flows, and system integrations.* Lead full lifecycle development from technical design through to deployment.* Partner with functional consultants to translate business needs into robust technical solutions.* Develop and maintain integrations using APIs ...

aligned with business goals. What They Are Looking For Degree in Computer Science, Information Systems, or related field. Minimum 3 years' experience in software development, with strong skills in SharePoint, SQL Server, and the .NET environment. Proficiency in C#, ASP.NET MVC/Core, and web API development. Experience … with front-end frameworks and modern development practices. Strong problem-solving skills and ability to manage multiple projects. Excellent communication and collaboration skills. Why Apply? This is a fantastic opportunity to join a prestigious global organization that values innovation and offers a collaborative, forward-thinking environment. You'll work ...

pressure; make frame-time and latency predictable across device classes Define and monitor SDK health metrics at scale (crashes, ANRs, error rates, perf envelopes) API design and developer experience Design clear, stable, Kotlin-first public APIs (versioned, well-documented, testable) Implement best practices for networking, auth and IO; make … release at the end of Q2 Champion performance budgets and device-class targets during planning Role boundaries SDK Engineer owns: code quality, API design, perf, stability, instrumentation, and technical notes for releases Solutions Engineer owns: release cadence, artefact publishing, changelogs, customer comms and debug sessions What Success Looks Like ...