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Senior Backend Engineer | Python, FastAPI & Scaling | Security SaaS. Senior Backend Engineer – High-Scale Systems | Python & FastAPI | Security SaaS. Senior Backend Engineer – High-Scale Systems | Python & FastAPI | Security SaaS.

The role involves the design and development of backend services and infrastructure for Machine Learning workloads.

As a Senior Engineer you will play a critical role in the development and maintenance of the backend aspects of the pricing system for our sportsbook and work alongside our quantitative analysts to deliver our in-house pricing solution. This position will be able to come in and have a lot of ownersh

Compensation: Competitive, based on location and experience .Location: UK or Turkey (Hybrid – Office & Remote).Keepnet is an AI-driven SaaS platform experiencing strong, sustained growth in the UK with growing global momentum, helping organisations manage human cyber risk at scale.Keepnet runs

We’re hiring a senior backend engineer to join a disciplined, senior team responsible for the platform behind Eequ, where engineers have real ownership and operate with high autonomy. Build and operate the backend platform that powers a real marketplace handling bookings, payments, and reporting f

Our backend tech stack is Spring Boot with Java/Kotlin/Groovy, MySQL and Opensearch, hosted on AWS. Our frontend is React with Typescript, and you will be expected to contribute small features to the frontend (though the role is at least 95% backend). You're an experienced engineer with multiple ye

Backend Developer Romsey, Hampshire (Hybrid - 3 days office / 2 remote, flexible)£45,000 - £50,000 + BenefitsOOP, PHP, LaravelMy client build innovative SaaS solutions that help organisations monitor, manage, and optimise critical infrastructure.

Software Architect Java - BackEnd, Back End Google Cloud (GCP).

A leading cryptocurrency platform in Greater London is seeking experienced backend engineers.

We're looking for an Product Engineer focussed on the Backend to help us scale our systems to unlock Granola for the next 100x users. In this role, you will deep dive into scaling challenges, build secure and reliable infrastructure, and develop robust backend solutions that power exciting new featu

We deliver, deploy and help integrate backend services alongside external co‑dev clients as part of industry leading game projects, and collaborate to define solutions and implement features on time and to a high standard. Experience in game development and having worked on at least two game title

We are looking for an exceptional Software Engineer, to join our Backend Engineering squad.

A fast-growing technology business in London is looking for a Senior Backend Developer to build reliable Back End systems and contribute to mission-critical projects.

You will design and implement backend services in Go, expose clean and secure APIs, and translate infrastructure primitives into product-grade platform capabilities. Design, implement, and maintain backend platform services in Go. Able to work full-stack, with backend as the primary strength and fro

A leading financial consulting firm is seeking a Senior Backend Engineer to design and build cloud-native applications with Java and Spring Boot.

Develop and maintain high‑performance backend services for complex data processing workloads. Ensure optimal performance, quality, and reliability across backend services. Java backend development (Java 17+).

A forward-thinking financial institution in Greater London is seeking a motivated engineer to own complex initiatives and design scalable backend systems.

This role involves building backend services in Python, working on data-intensive workflows, and improving system design.

You will work with backend engineers on AAA and mobile games, constructing systems and delivering high-quality solutions. Ideal candidates will have experience in game development, backend services, and proficiency in programming languages like Java or Golang.

A voice AI startup based in London is seeking a Backend Engineer to join their team. As the second backend engineer, you'll own the core API platform, designing scalable infrastructure for real-time voice interpretation.

This hybrid role in London involves designing and maintaining scalable backend Java services.

A growing technology startup in London is seeking a Senior Backend Engineer to help shape their next-generation CRM platform. In this role, you'll design and build scalable backend systems using Node.

As a Senior Backend Developer, you will be part of the team that develops the backend components of all Bitfinex services (main trading application, Lightning Network support, Blockchain integrations, etc. Senior Backend Developer - Node. Scalability: ensure backend services remain smooth, responsiv

A technology company in Hackney, London, is seeking a Tech Lead to drive backend and data engineering.

TypeScript) to design and implement backend services for their payment platform.

A tech-driven educational platform in the UK is seeking a Senior Backend Engineer to architect high-performance server-side applications.

You’ll be UK or EU based and you’ll be working in a team of backend engineers across MPG. We deliver, deploy and help integrate backend services alongside external co-dev clients as part of industry leading game projects, and collaborate to define solutions and implement features on time and to

You will develop robust backend services using Python and participate in the full software development lifecycle.

A tech learning company seeks a Senior Backend Engineer to lead the development of scalable multitenant infrastructure.

We are looking for an exceptional Software Engineer, to join our Backend Engineering squad.

A rapidly scaling software company in Greater London seeks a Staff Software Engineer to build backend infrastructure for AI systems in high-stakes environments. You will design backend services for large-scale data processing and collaborate with cross-functional teams.

The successful candidate should possess strong experience in backend development, particularly with Python, as well as familiarity with cloud platforms and a desire to work in a dynamic startup environment. A disruptive technology startup is seeking a backend developer to build and maintain services

Guide backend architecture and ensure high standards in performance, security, and reliability.

You will work directly with the CTO and your focus will span different areas, with challenges related to our backend infrastructure, from scaling challenges to data processing ones.

You’ll be working within the team responsible for the development and maintenance of our client solutions, with a focus on backend software engineering. Work closely with product, design and backend teams to deliver polished and reliable features.

We’re seeking a Senior Backend Engineer (Java) to join our Technology & Engineering team. Working on high‑impact platforms for Tier 1 financial institutions, you’ll lead backend design, champion agile best practices, and contribute to the evolution of modern banking technology.

A fast-growing AI technology company in Greater London seeks a Software Engineer to develop backend services and APIs.

A leading property management technology firm in Greater London is seeking an experienced Backend Engineer to join their dynamic team.

As a Senior Backend Engineer, you are experienced and excited about building innovative next‑generation social good platforms which empower nonprofits to do their world‑changing work.

A fintech company in London is expanding and seeking Senior and Lead Backend Engineers to design scalable systems and shape modern platforms.

LemFi (Series B) is building the go-to financial app for the Global South.Moving to a new country shouldn’t mean starting from zero.What began as fast, affordable remittances is now evolving into a complete platform for multi-currency accounts, payments, credit, and long-term financial growth.You

Senior Software Engineer, Backend. As a Senior Software Engineer, Backend, you’ll play a critical role in shaping the future of digital payments.

A major energy provider in the UK is seeking a Staff Software Engineer to play a key role in designing and managing cloud-based software platforms.The role is hybrid, with the expectation of working 3-4 days a month in the office.Responsibilities include designing scalable software solutions, enhanc

A technology consulting firm is looking for a Senior Python developer to enhance applications for investor portfolio management.You will collaborate with business analysts and developers, focusing on designing production APIs, improving system efficiency, and employing cloud-native solutions.The ide

A seed-stage AI startup is seeking a Back End Engineer to develop reliable back end services, APIs, and data systems.You'll work alongside a small team to design and implement solutions that enhance customer-facing features and workflows.Ideal candidates should have strong knowledge of C# and ASP.NE

This role involves backend development with Python and FastAPI, focused on creating scalable distributed architecture on Google Cloud.

A fast-growing database company based in London is looking for a Senior Backend Engineer to join their dynamic team. The role involves leading the design of scalable backend services, developing cloud infrastructure, and optimizing database performance.