11 development jobs found in City of London, London

The OpportunityIn this role, you will go beyond building standard user-facing features to focus on critical internal platform architecture. You will work within a lean, agile team to bridge frontend development with backend systems, transforming how internal engineers interact with, validate, and secure core data pipelines.Your ImpactPlatform Innovation: Build and scale developer-facing tools and dashboards from scratch to manage data contracts at the code

The Opportunity:In this role, you will go beyond building standard user-facing features to focus on critical internal platform architecture. Working within a lean, agile environment, you will develop and expand multilingual content taxonomy systems, ensuring complex global catalogs are seamlessly organized and discoverable.Your Impact:Platform Innovation: Solution design and end-to-end implementation of capabilities within existing cloud services and data

Senior C# / .NET Developer | Risk & Securities LendingLocation: London (Hybrid) Contract Duration: 6 Months Industry: Financial ServicesAbout the OpportunityAre you a seasoned C# engineer with a deep understanding of financial markets? We are seeking an experienced Senior C# / .NET Developer to join a high-performing technology team supporting critical Risk Management and Securities Lending platforms.In this 6-month hybrid contract, you will play a pivotal

The OpportunityIn this role, you will focus on building production-grade Agentic AI platform architectures. Working within an agile team, you will bridge advanced LLM capabilities with enterprise systems to deploy scalable, multi-agent workflows.Your ImpactAgentic Innovation: Build multi-agent systems and stateful workflows using Google ADK, LangChain, or LangGraph.System Guardrails: Implement fallback logic, circuit breakers, and structured outputs via Py

Quant Developer - Exotic DerivativesLocation: London (3 days/week hybrid)Duration: 6-12 months (12-month scope)The RoleJoin a front-office team at a global financial institution building a brand-new capital markets valuation engine from scratch. This is a hands-on, individual contributor role-no black-box custodianship. You will read academic papers, build pricing models from the ground up, and directly defend your modeling choices.Key RequirementsTechnica

We are looking for a Senior C++ Engineer to join a newly forming, elite engineering squad tasked with modernizing the core cross-platform networking stack for one of the world's largest streaming tech ecosystems.💼 The Gig at a GlanceRole: Senior C++ Engineer (Mobile Infrastructure)Term: Contract until year-end (with strong potential for extension)Location: 100% RemoteTech Stack: C++, iOS, Android, HTTP/2+, WebSockets, Custom Shared Libraries🛠️ What You'

Job Title: Back End / Fullstack Engineer IIILocation: UK(Fully remote)Contract Duration: 6 monthsAbout the RoleWe are looking for a Web / Fullstack Engineer to help our team. You bring a strong foundation in system design, data structures, and algorithms. You enjoy untangling problems with teammates and choosing pragmatic solutions that move the product forward. You will design clear interfaces, dependable data flows, and resilient systems that ensure we

Junior Full-Stack Engineer (React, TypeScript, Python)Location: [London, UK- 5days a week onsite] Job Type: Full-time, Permanent Experience Level: Junior / Graduate (0-2 years)- Strictly looking for junior candidates with no more than 2 years of experience.The RoleWe are looking for an ambitious and curious Junior Full-Stack Engineer to join our core team. In this role, you won't just be fixing bugs or working on isolated features-you will be building impa

Role : Avaloq DeveloperLocation: Scotland, UK (Remote)Contract Duration: 10 MonthsJob Description:An Avaloq Developer is responsible for the end‑to‑end design, implementation, customization, and unit testing of solutions within the Avaloq Banking Suite. The role involves delivering high‑quality parameterization, scripting, interfaces, and report development aligned to functional and technical requirements.Key responsibilities include:Implementing Avaloq pa

Contract Full Stack / Backend Engineer III - Trust & Safety PlatformsDuration: 6-Month Contract (with potential for extension)Location: 100% Remote (UK-based)Inside/Outside IR35: Insert IR35 The OpportunityWe are looking for a Senior Full Stack / Backend Engineer (Level III) to join the Trust & Safety / Policy Platform team for one of the world's leading, household-name audio streaming platforms.If you are a backend-heavy engineer who enjoys the autonomy o

Senior Backend Engineer (Security Compliance) - 100% RemoteThe Role Join a high-autonomy team as a senior contractor architecting the next generation of our security compliance platform. You will own technical decisions end-to-end, building systems that ensure every production code change meets regulatory standards across thousands of repositoriesWhat You'll DoArchitect & Build: Develop Java-based backend services (Spring Boot, Apollo) to enforce complianc