7 of 7 Permanent API Design Jobs in Central London

Data Analyst

Hiring Organisation
Computappoint
Location
City of London, London, England, United Kingdom
Employment Type
Full-Time
Salary
Salary negotiable
technically proficient Data Analyst to join the IT Department within the Strategy & Architecture Team. This role will have a strong focus on API design and integrations between systems. This role is critical in enabling data-driven decision-making and ensuring seamless data exchange across internal systems and external … platforms. Key Responsibilities Analyse and interpret complex datasets to support IT operations and strategic initiatives. Design, document, and maintain APIs that facilitate secure and efficient integration of data between systems. Create data dictionaries that describe data structures, elements, their meanings, and relationships within a dataset or database. Create Business ...

Senior Backend Engineer (Telco Integration Lead) Golang

Hiring Organisation
Ventula Consulting Limited
Location
City of London, London, United Kingdom
Employment Type
Permanent, Work From Home
seeking a foundational engineer to own our single greatest strategic asset: our unique, privileged access to network-level intelligence via the GSMA CAMARA API standard. This is our right to win, and you will be the engineer responsible for building the bridge to it. You will be the Critical … build the Security Signal Ingestion path, the secure, low-latency, and out-of-band data channel connecting to our founding members' network API gateways. ? Architect and implement a carrier-agnostic, vendor-agnostic connector layer to consume RESTful APIs from a heterogeneous global landscape of telco partners and IMS vendors ...

Principal Full Stack Engineer React, C#, AWS

Hiring Organisation
Smart Sourcer Limited
Location
City of London, London, United Kingdom
Employment Type
Permanent
Service (PaaS) environment. What Youll Be Doing: Own architecture and technical decisions across squads; accountable for how software is built and shipped. Design and develop distributed, scalable microservices (C# .NET Core or Node.js) and REST/JSON APIs. Build modern React + TypeScript UIs with component-driven design, advanced state management, and reusable frameworks. Leverage AWS services (Lambda, API Gateway, SQS/SNS, Step Functions, S3, IAM) to deliver secure, event-driven systems. Embed testing-first practices (TDD/BDD, contract tests, Jest/RTL, Playwright/Cypress, xUnit/NUnit) to raise code quality. Implement ...

Head of Development and AI

Hiring Organisation
McCabe & Barton
Location
City of London, London, United Kingdom
Employment Type
Permanent
engineering background with proficiency in Python, JavaScript/TypeScript, Java, or Go Experience with modern frameworks (React, Node.js, Django, FastAPI) Knowledge of microservices architecture, API design (REST, GraphQL) Experience with containerization (Docker, Kubernetes) and cloud-native development patterns DevOps & SRE Practices Experience implementing CI/CD pipelines ...

eFX Engineer

Hiring Organisation
Sanderson Recruitment
Location
City of London, London, United Kingdom
Employment Type
Permanent
+ benefits/Bonus Join a leading financial technology and trading organisation driving innovation in electronic markets. As an eFX Software Engineer, you'll design and deliver high-performance, low-latency trading solutions that underpin mission-critical systems. This role offers the chance to work on cutting-edge technology … where speed, scalability, and resilience are key. About the Role Lead the design and development of secure, high-performance eFX systems Define and evolve Java patterns and techniques optimised for ultra-low latency (<40s) Architect fault-tolerant, scalable trading systems Influence technical strategy, architecture, and product roadmaps Collaborate with ...

Senior Developer

Hiring Organisation
Reed Technology
Location
City, London, United Kingdom
Employment Type
Permanent
Salary
GBP 70,000 - 80,000 Annual
commercial software development experience. Proven success in high-performing engineering teams within fast-paced environments. Deep expertise in: Python (Django, Flask, or FastAPI) PostgreSQL (design, optimisation, maintenance) Containerisation (Docker/Kubernetes) Event-driven architecture (Kafka/RabbitMQ) Desirable experience includes: TypeScript/JavaScript (NextJS, NodeJS, Tailwind) Terraform and DevOps … practices Experience in building and scaling SaaS platforms in production. Strong background in software architecture, microservices, and API design. Hands-on experience with AWS platform. Excellent communication skills, capable of motivating and aligning technical teams. Experience with AI tools, APIs, or ML pipelines is highly desirable. Bonus: Exposure ...

Senior Developer

Hiring Organisation
Reed
Location
Holborn, London, England, United Kingdom
Employment Type
Full-Time
Salary
£70,000 - £80,000 per annum, Inc benefits
commercial software development experience. Proven success in high-performing engineering teams within fast-paced environments. Deep expertise in: Python (Django, Flask, or FastAPI) PostgreSQL (design, optimisation, maintenance) Containerisation (Docker/Kubernetes) Event-driven architecture (Kafka/RabbitMQ) Desirable experience includes: TypeScript/JavaScript (NextJS, NodeJS, Tailwind) Terraform and DevOps … practices Experience in building and scaling SaaS platforms in production. Strong background in software architecture, microservices, and API design. Hands-on experience with AWS platform. Excellent communication skills, capable of motivating and aligning technical teams. Experience with AI tools, APIs, or ML pipelines is highly desirable. Bonus: Exposure ...