376 to 400 of 445 Permanent API Design Jobs

month contract, with high extension potential. The role is remote across Europe, 100% remote, working on backend services and AI-powered features. You will design, build and iterate features end to end using Node.js (NestJS/Express/Fastify), with emphasis on API design and scalable architectures. ...

point to what that team shipped and how the people on it grew. You are technically credible with experienced engineers. You can review a design, understand the trade‐offs in distributed systems or payment platforms, and recognize when a technical problem needs deeper investigation. You are comfortable managing … decisions to both engineers and non‐engineers. Examples of Desirable Skills, Knowledge, and Experience Strong technical grounding in distributed systems, low‐latency transaction processing, API design, web security, or adjacent areas. Experience building or operating products involving traditional payment rails, digital wallets, or open authorization/authentication standards ...

seeking a Senior Laravel Developer to build bespoke B2B platforms for UK and international clients. You will own features end-to-end—from technical design through deployment—within agile squads that demo weekly. Requirements include 5+ years PHP/Laravel experience, strong MySQL and API design skills ...

engineer to build and evolve the SDK that ships inside our customers' games. The role is SDK work, not app work, with ownership from API design to live support. Based in-office (hybrid model) in London or Ljubljana, Slovenia. You will own the public API surface across ...

settlement infrastructure, merchant-facing experiences, and developer-first toolkits, you will own the end-to-end product lifecycle—from long-term strategy and architectural design to global roadmap execution. In this role, you will bridge our online payments-for-platforms suite (enabling marketplaces and SaaS platforms to collect, route … present ecosystems (POS/SoftPOS, EMV/NFC standards, terminal management). Proven ability to engage deeply with engineering on complex architectural discussions covering API design, distributed ledgers, high‐throughput transaction processing, and hardware/software interfaces. Exceptional analytical rigor with a track record of structuring complex ecosystem ...

Significant impact on a function and/or the business through making decisions that determine technical approaches and strategies for the area. Position Objective: Design, build and extend backtesting infrastructure that drive production code paths with historical data. This is in the context of automated market-making models … preferably Rust although C++ and Java would be considered. KDB, Python, SQL Extensive experience in messaging and data serialization technologies, market data processing, API design, latency optimization, code testing, build and deployment tools Experience handling large volumes of disparate data sources, including integration and normalization Experience in taking ...

help build and deliver trusted market-risk technology platforms in a secure, scalable environment and oversee key engineering initiatives. You will lead Python and API design for risk workflows, collaborate with analysts and technology teams, and drive AI-assisted engineering practices with a focus on security, reliability ...

clean, scalable code that supports thousands of users. You’ll collaborate with product and education teams in a hybrid Farnborough setting, contribute to API design with GraphQL and REST, and help improve performance and test coverage. #J-18808-Ljbffr ...

experience with C++ or Rust, and collaboration across multiple teams, including Compliance and Operations. Ideally, you bring knowledge of fixed income systems, experience with API design, and familiarity with Kubernetes and CI/CD practices to help scale our technology platform #J-18808-Ljbffr ...

London is seeking a hands-on Tech Lead to shape the future of our customer contact technology. You will own architectural decisions, drive API design and mentor engineers to build secure, scalable cloud-native solutions using Node.js, React, TypeScript and AWS. Working with product managers, architects and engineering ...

ship into customer environments from day one. You’ll work with Python/JS/Java/Apex, tackle LLM prompts, data modeling, and API design while collaborating with sales and customer architects. Travel ~25% to partner with customers. #J-18808-Ljbffr ...

Labs Ltd is seeking a foundational engineer to help build and scale ROO's platform. This role involves full-stack development, including feature shipping, API design, and integration of blockchain technology. Candidates should have over 4 years of experience with TypeScript, React/Next.js, and Node.js ...

implementing responsible, ethical AI practices (e.g., risk assessment, bias mitigation, quality and accuracy reviews)Experience building maintainable and testable code bases, including API design and unit testing techniquesExperience building Android applications in Java using Android SDKExperience with multithreading programming and mobile memory managementAbout Meta:Meta builds technologies that ...

roadmap to achieve that vision. Be responsible for communicating the vision to the whole business Drive product delivery forwards ; collaborate with engineers on API design and integration patterns, help the team deliver at pace by challenging assumptions and constantly improving ways of working, manage feature development vs tech ...

Lupa Pets Ltd is hiring a software engineer to own features end-to-end across the full stack, from API design to React interfaces and database migrations. You will ship a real, user-facing product reaching vets and pet parents daily, collaborating with product and design ...

Developer to join a specialist engineering team delivering secure, mission-critical technology for UK National Security customers. The role offers the chance to design, develop, deploy and maintain cloud-native applications and services on Amazon Web Services (AWS), supporting systems that contribute to the UK's national security … takes ownership of the full software delivery lifecycle and wants to apply their technical skills to work with a meaningful national impact. Key Responsibilities Design, develop, deploy and maintain cloud-based applications and services using AWS. Build secure, scalable and resilient cloud solutions that support critical National Security customer ...

Wise Platform in London is seeking a Senior Backend Engineer to join our Partner Experience team. You will design and build backend microservices, focusing on partner onboarding, permissions, and cross-border payment tooling, with a strong emphasis on reliability and security. You’ll work across API design ...

Augur Communications Ltd is seeking a Backend Engineer to design and build the distributed systems, storage infrastructure, and platform primitives that underpin Augur's sensor integration product. You will work across the full backend surface—from stream processing and storage to API design and data pipelines—using ...

senior, hands-on engineers are needed to join a product development team working on an experimental, high-ambition product initiative. You will independently design, build and iterate on product features end to end, with a strong focus on backend services and AI-powered capabilities built on LLMs and agentic … TypeScript expertise on the backend (Node.js with NestJS, Express or Fastify) Proven delivery of production-grade applications from concept through to release Strong API design and system integration experience Ability to own features independently with minimal oversight Working knowledge of LLMs, agentic AI and AI-powered applications Familiarity ...

Overview Senior Software Engineers own the technical delivery of a small squad (typically 3–5 engineers) building software with Blazor, C# and RDT’s design system, and report to the Head of Software Engineering. A Senior Software Engineer role combines hands‐on technical leadership with line management responsibility … grow their skills and careers. Key Responsibilities You will lead a small squad delivering web applications built with Blazor, C# and RDT’s design system, setting technical direction and owning code quality within the squad. You will build enterprise, cloud-native applications in Azure, and be involved ...

leader who delivers measurable results for sophisticated AI products under ambiguous conditions in a fast‐paced environment someone who is as comfortable discussing an API spec or an auth flow with an engineering team as they are presenting an AI strategy to senior management. You will thrives in collaborative … engineering workflows. Genuinely technical and a proven builder. Comfortable as a hands‐on partner with engineering and data science teams, able to reason through API design, system architecture, and technical trade‐offs, with credibility to lead build‐versus‐partner‐versus‐defer decisions. Proven experience identifying, validating, and prioritising ...

will have ownership and autonomy from Day One. There is no corporate ladder at Arondite. From your first day, you will directly influence the design, functionality, and direction of Arondite’s product offering. We hire the best people and give them extremely high levels of autonomy … synthesising their feedback Building a clear, explainable process for prioritising work in the face of B2G uncertainty Communicating to and working with Engineering and Design to build powerful, simple features that can be customised to deliver value to a wide set of users Championing a culture of technical excellence ...

Team: Activity Monitor The Role We are seeking a Senior Full Stack Software Engineer (.NET) to join TRG Screen’s engineering team. You will design, develop, and evolve backend services and frontend applications across our enterprise product suite - a hands-on role that blends new feature development with improving … driven engineering organisation; this role is expected to use AI tooling by default across the full development lifecycle. Responsibilities Development & Delivery Design, develop, and maintain backend services and frontend applications for TRG Screen products, including modernisation and maintenance of legacy code. Participate in the full SDLC - requirements analysis, design ...

React/Node problems and reference implementations that model the technical bar. Owning technical direction: Leading architecture, boundaries, standards, build‐vs‐buy decisions, integration design and the call on when to take on technical debt and when to pay it down. Protecting release quality and operations: Owning release readiness … stay in the code, not step away from it. You’re technically strong: You’re confident in React, Node, modern web application development, architecture, API design, integration patterns and secure application design. You know how to raise the engineering bar: You’re an authoritative reviewer, able to review ...

lead Zero Trust initiatives, and document architecture decisions with a focus on secure, scalable design. You will mentor engineers, drive security policy and platform API design, and collaborate with IAM, Infosec and infrastructure teams to ensure auditable controls. #J-18808-Ljbffr ...