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Senior Backend Engineer
Senior Backend Engineer
Plexus Resource Solutions Ltd
United States
From £190,000 to £240,000 per annum
$190k - $240k - Fully Remote - San Francisco, USA - RAISED OVER $100 MILLION!!! Plexus has another great opportunity in the Web3 space. The company is creating entertainment that empowers on the blockchain. Powered by talent from around the globe, they believe in making bold moves to create products that have never been seen in the marketplace. They are looking for a Senior Backend Engineer to join their DEX team to design, built and scale the services that power decentralized trading. * Architect and Build DEX services with a focus on throughput, determinism, and fault isolation. * Design APIs (REST/WebSocket) and data models that are explicit , versioned, and easy to integrate. * Integrate on-chain logic with their blockchain. * Performance and Reliability. * Security and Compliance by Design. * Observability: Define golden signals, metrics, tracing and error budget
$190k - $240k - Fully Remote - San Francisco, USA - RAISED OVER $100 MILLION!!! Plexus has another great opportunity in the Web3 space. The company is creating entertainment that empowers on the blockchain. Powered by talent from around the globe, they believe in making bold moves to create products that have never been seen in the marketplace. They are looking for a Senior Backend Engineer to join their DEX team to design, built and scale the services that power decentralized trading. * Architect and Build DEX services with a focus on throughput, determinism, and fault isolation. * Design APIs (REST/WebSocket) and data models that are explicit , versioned, and easy to integrate. * Integrate on-chain logic with their blockchain. * Performance and Reliability. * Security and Compliance by Design. * Observability: Define golden signals, metrics, tracing and error budget
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Senior Backend Engineer
Senior Backend Engineer
Ncounter LTD
W1, Central London
From £120,000 to £160,000 per annum Equity and package
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Product-Focused Backend Engineer Functional Programming & Distributed Systems - As a Backend Engineer, youll join a growing team working at the forefront of AI infrastructure. * Proven track record of building and scaling distributed backend systems - London (Hybrid) | £120,000£160,000 + Equity - At Ncounter, were partnering with a cutting-edge AI company on a mission to redefine how professionals in highly regulated industries interact with complex, multi-modal data. Their platform empowers users to deploy custom no-code AI agents that produce verifiable outputs with full transparency - ensuring trust, compliance, and control remain central to every decision. This isnt just about clean code or strong delivery - its about ownership, product intuition, and building for scale. Youll be
An innovative, mission-driven LegalTech SaaS start-up is looking for a Senior Product Engineer (Backend & Data) with deep experience in Python, Product development, and Data engineering. Founding Engineer | Python | GCP | Terraform | Event-Based Systems | Data Pipelines - They want engineers to be setup to stay on top in the new AI world. Your mission: own, build, and scale version 1 - the first commercial-ready Product to go to market. * Salary: Up to £100,000 (DOE) + Equity * Location: Fully remote (UK only) * Stack:Python, TypeScript, GCP, Pub/Sub, SQL & NoSQL, IaC (Terraform), CI/CD (GitHub Actions), Observability tools, AI tooling - Youll join a remote first, high-trust engineering team working with a modern, cloud-native stack - with real influence over technical decisions from day one. Youll ta
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As a Senior Software Engineer on Substrate, you will design and build Palantirs managed Kubernetes product offerings across all these environments. Palantir builds the worlds leading software for data-driven decisions and operations. o 4+ years of professional software development experience on core infrastructure with emphasis on operational excellence - A World-Changing Company - By bringing the right data to the people who need it, our platforms empower our partners to develop lifesaving drugs, forecast supply chain disruptions, locate missing children, and more. The Role - Substrate is the team responsible for Palantirs core production infrastructure 100s of K8s clusters from on-prem to the major cloud hyperscalers, whether they are internet-connected or air-gapped, small hardware footprint or large. You and your
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They are building a team of exceptional developers in the heart of Newcastle City Centre, creating an intellectually stimulating environment where world-class technical talent can work on complex, high-impact initiatives tied to global markets and events. If you're an outstanding developer and communicator who thrives on solving challenging problems at pace, this is a rare opportunity to join a business at its inception and help shape its culture and future. ££110,000 - £130,000 GBP - Onsite WORKING - Location: Newcastle Upon Tyne, North East - United Kingdom Type: Permanent - Up to £130,000 + Excellent Benefits - Our client is a newly established joint venture between a global leader in management consulting and a leading global alternative investment fund manager. What You'll Be Doing * Take ownership of technical products and proje
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Senior Backend Engineer
Senior Backend Engineer
Plexus Resource Solutions Ltd
EC1, City of London
From £90,000 to £130,000 per annum Excluding Benefits
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EC1, City of London
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About this role - What are Aladdin and Aladdin Engineering? * You will be working on BlackRock's investment operating system called Aladdin. Aladdin is used both internally within BlackRock and externally by many financial institutions. Aladdin combines sophisticated risk analytics with comprehensive portfolio management, trading, and operations tools on a single platform to power informed decision-making and create a connective tissue for thousands of users investing worldwide. * Our development teams reside inside the Aladdin Engineering group. We collaboratively build the next generation of technology that changes the way information, people, and technology intersect for global investment firms. We build and package tools that manage trillions in assets and supports millions of financial instruments. We perform risk calculations and process millions of transactions
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Senior Backend Software Engineer
Senior Backend Software Engineer
Plexus Resource Solutions Ltd
EC1, City of London
From £80,000 to £110,000 per annum
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They are looking for a senior backend software engineer (Python) to join the team to help develop and maintain the spine of Web3 technologies. * Design and implement backend systems for Web3-focused products * Minimum 3 years of professional software engineering experience * Strong understanding of backend architecture, data modeling, and system design - Gaming/Web3 Technologies - Remote - Salary: £80k - £110k - Plexus has a great opportunity within the Web3 space. Their mission is to create economic opportunities for people across the globe, leveraging gaming as a natural and engaging pathway into the Web3 ecosystem. * Develop and maintain RESTful APIs using Python * Optimize system performance and reliability across distributed environments * Operate within cross-functional teams to ensure scalable
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Our client an industry leading private sector business located in East Sussex is looking for a full stack .Net developer. * Relevant software development experience, with strong expertise in .NET (C#) And ideally VB.NET - Contract - 6 Months - East Sussex - Hybrid model (3 days p/w on site) £375 - 425 p/d (outside IR35) Key Roles * Participate in migration of legacy systems built in C#, VB.NET, Angular, using SQL Server technologies. * Maintaining applications, ensuring reliability, maintainability, and evolution. * Act as a liaison between the development team and internal business stakeholders. * Implementation of modern architectures: micro services, containerised services, and serverless cloud-native components in AWS. * Diagnose and resolve complex support issues. * Collaborate with Business Anal
Our client an industry leading private sector business located in East Sussex is looking for a full stack .Net developer. * Relevant software development experience, with strong expertise in .NET (C#) And ideally VB.NET - Contract - 6 Months - East Sussex - Hybrid model (3 days p/w on site) £375 - 425 p/d (outside IR35) Key Roles * Participate in migration of legacy systems built in C#, VB.NET, Angular, using SQL Server technologies. * Maintaining applications, ensuring reliability, maintainability, and evolution. * Act as a liaison between the development team and internal business stakeholders. * Implementation of modern architectures: micro services, containerised services, and serverless cloud-native components in AWS. * Diagnose and resolve complex support issues. * Collaborate with Business Anal
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KEYWORDS: Contract .NET Developer, Microsoft Stack Engineer, AI/ML Engineer, Azure Developer, Banking Software Engineer, Outside IR35, Remote - New contract opportunity for an experienced .NET Developer to join a high-profile programme in the banking/fintech sector, delivering secure enterprise applications and integrating AI/ML solutions. * Open to UK/EU-Based Candidates Only * Outside IR35 * 9-12 Month Initial Contract | Start ASAP | Likely Extension * Independently manage and deliver technical projects end-to-end - greenfield project experience. * Design, develop, test, and deploy enterprise applications using Microsoft technologies. * Build secure fintech workflows aligned with compliance (GDPR, OAuth, encryption). * Integrate and deploy AI/ML components (NLP and recommendation systems). * Collaborate in an Agile
KEYWORDS: Contract .NET Developer, Microsoft Stack Engineer, AI/ML Engineer, Azure Developer, Banking Software Engineer, Outside IR35, Remote - New contract opportunity for an experienced .NET Developer to join a high-profile programme in the banking/fintech sector, delivering secure enterprise applications and integrating AI/ML solutions. * Open to UK/EU-Based Candidates Only * Outside IR35 * 9-12 Month Initial Contract | Start ASAP | Likely Extension * Independently manage and deliver technical projects end-to-end - greenfield project experience. * Design, develop, test, and deploy enterprise applications using Microsoft technologies. * Build secure fintech workflows aligned with compliance (GDPR, OAuth, encryption). * Integrate and deploy AI/ML components (NLP and recommendation systems). * Collaborate in an Agile
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Senior Software Engineer
Senior Software Engineer
Fruition Group
EC1, City of London
£80000.00 - £110000.00 per annum + + Equity
They're looking for a Senior Full Stack Engineer to join our founding tech team and help scale the impact even further. Full Stack - AI Health Tech - London, 2 days a week on site - Up to £110,000 + Equity - Looking to work on something meaningful? I'm currently helping a mission-led health tech start-up who are using AI to remove admin overload, freeing up doctors and clinicians to do what they do best: care. They're tackling complex, data-heavy workflows with intelligent automation. The result? Faster decisions. Better care. Less burnout. And millions of lives already improved. What You'll Be Doing * Take real ownership across the full development lifecycle - from idea to production * Work closely with our CTO and CEO to shape the product roadmap * Architect, build and maintain full stack systems (Python or C# + modern JS) * Integra
They're looking for a Senior Full Stack Engineer to join our founding tech team and help scale the impact even further. Full Stack - AI Health Tech - London, 2 days a week on site - Up to £110,000 + Equity - Looking to work on something meaningful? I'm currently helping a mission-led health tech start-up who are using AI to remove admin overload, freeing up doctors and clinicians to do what they do best: care. They're tackling complex, data-heavy workflows with intelligent automation. The result? Faster decisions. Better care. Less burnout. And millions of lives already improved. What You'll Be Doing * Take real ownership across the full development lifecycle - from idea to production * Work closely with our CTO and CEO to shape the product roadmap * Architect, build and maintain full stack systems (Python or C# + modern JS) * Integra
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Senior Full Stack Engineer
Senior Full Stack Engineer
REVYBE IT RECRUITMENT LIMITED
EC1, City of London
From £90,000 to £120,000 per annum + Shares
Theyre now looking for a Senior Full-Stack Engineer to help design and build the next generation of their AI-driven platform. * Strong experience as a Full-Stack Engineer across React, Next.js, Node.js, and Python. Reporting directly into the CTO and collaborating closely with product and research teams, this is a unique chance to take ownership across the stack and make a lasting impact in a company at the forefront of applied AI. The role is full-time, 5 days a week in their London office. London AI Start-up - Up to £120,000 + Shares + Private Healthcare + Pension - Were working with a well-funded AI start-up in London thats gearing up for huge growth. Theyre expecting to scale 10x over the next 18 months. The role - This isnt your standard engineering role youll be
Theyre now looking for a Senior Full-Stack Engineer to help design and build the next generation of their AI-driven platform. * Strong experience as a Full-Stack Engineer across React, Next.js, Node.js, and Python. Reporting directly into the CTO and collaborating closely with product and research teams, this is a unique chance to take ownership across the stack and make a lasting impact in a company at the forefront of applied AI. The role is full-time, 5 days a week in their London office. London AI Start-up - Up to £120,000 + Shares + Private Healthcare + Pension - Were working with a well-funded AI start-up in London thats gearing up for huge growth. Theyre expecting to scale 10x over the next 18 months. The role - This isnt your standard engineering role youll be
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Senior C#/.NET Engineer – WPF Desktop Applications
Senior C#/.NET Engineer – WPF Desktop Applications
Halian Technology Limited
United States
From £130,000 to £180,000 per annum
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Senior Software Engineer C#/.NET (WPF Desktop) Location: New York City (Hybrid 3 days onsite) Salary: $130,000 $180,000 (Permanent Role) Were hiring aSenior Software Engineerwith strong experience inC#/.NETandWPFto join our clients team inNew York City. This is afront-end focusedrole (approx. 70%) working on high-performance desktop applications in a finance-adjacent environment. What Youll Be Working On - Building and enhancingdesktop applications(not web-based) Designing intuitive and responsiveWPF GUIs - Collaborating with a high-performing engineering team - Contributing to a modern, scalableC#/.NETcodebase - What Were Looking For - 7+ years ofC#/.NETdevelopment experience (flexible for strong candidates) Deep expertise inWPFand desktop UI/UX - Solid understanding ofdesktop application architecture - Bonus: Experience withapplication migrations(e.
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Senior Node.js Developer
Senior Node.js Developer
ARC IT Recruitment Ltd
SW1V, South West London, SW1W 9SJ
Up to £100,000 per annum
Senior Developer with experience in mentoring more junior colleagues. * Node.js * Mentoring of Junior Developers West London (Hybrid - 3 days in office) You will play a key role in shaping and expanding our cutting-edge technology stack. As a key player in our tech team, you'll help us scale and innovate, building on top of robust back-end servers and back-office systems. Gain full exposure to the entire development lifecycle, from planning and design to architecture, back-end, and front-end development. Working in a motivated, energetic team thats always learning and growing, you will be given career growth opportunities in a company which has the backing of a market-leading travel brand. * Collaborate closely with our systems architecture team to refine and enhance our technology in
Senior Developer with experience in mentoring more junior colleagues. * Node.js * Mentoring of Junior Developers West London (Hybrid - 3 days in office) You will play a key role in shaping and expanding our cutting-edge technology stack. As a key player in our tech team, you'll help us scale and innovate, building on top of robust back-end servers and back-office systems. Gain full exposure to the entire development lifecycle, from planning and design to architecture, back-end, and front-end development. Working in a motivated, energetic team thats always learning and growing, you will be given career growth opportunities in a company which has the backing of a market-leading travel brand. * Collaborate closely with our systems architecture team to refine and enhance our technology in
We're seeking a Lead Fullstack Engineer to own the frontend architecture and elevate the B2C user experience across our digital products. As a Lead Engineer, you'll champion intentional AI adoption to empower your team and unlock new levels of productivity. With the opportunity to work on existing products which have generated millions in revenue to something new changing the landscape of the insurance world, this is the perfect opportunity for a results driven and growth focussed Senior engineer looking to start an ambitious business. You'll lead the migration from a legacy monolith to a modern microfrontend and Backend-for-Frontend (BFF) ecosystem, leveraging React, Next.js, TypeScript, and advanced communication protocols such as GraphQL and gRPC. * Lead the design and implementation of scalable, performant, and maintainable frontend architectures that support ...
We're seeking a Lead Fullstack Engineer to own the frontend architecture and elevate the B2C user experience across our digital products. As a Lead Engineer, you'll champion intentional AI adoption to empower your team and unlock new levels of productivity. With the opportunity to work on existing products which have generated millions in revenue to something new changing the landscape of the insurance world, this is the perfect opportunity for a results driven and growth focussed Senior engineer looking to start an ambitious business. You'll lead the migration from a legacy monolith to a modern microfrontend and Backend-for-Frontend (BFF) ecosystem, leveraging React, Next.js, TypeScript, and advanced communication protocols such as GraphQL and gRPC. * Lead the design and implementation of scalable, performant, and maintainable frontend architectures that support ...
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Corporate Domain Solution Architect, develop architectural designs that meet our commercial and corproate goals and long-term vision. At Heathrow, you can be part of this providing solutions that make every journey better for millions each year. Our Solutions team covers project management, process improvement, business change, technology, cyber defence, masterplanning, infrastructure and procurement. Collaborate with Finance, HR, commerce, marketing, customer experience teams, and suppliers to align technology solutions with business objectives. * Accountable for the developing, designing and documenting solutions and solution options (high level design / low level design and functional and non-functional) * Work closely with the Domain architect to
Corporate Domain Solution Architect, develop architectural designs that meet our commercial and corproate goals and long-term vision. At Heathrow, you can be part of this providing solutions that make every journey better for millions each year. Our Solutions team covers project management, process improvement, business change, technology, cyber defence, masterplanning, infrastructure and procurement. Collaborate with Finance, HR, commerce, marketing, customer experience teams, and suppliers to align technology solutions with business objectives. * Accountable for the developing, designing and documenting solutions and solution options (high level design / low level design and functional and non-functional) * Work closely with the Domain architect to
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A newly established venture, backed by leading names in management consulting and global investment, is seeking outstanding Software Developers to join its growing team in the heart of Newcastle City Centre. Developers here are trusted to take ownership, work at pace, and tackle intellectually stimulating challenges while collaborating closely with colleagues and clients. * Ability to manage full lifecycle software development projects from inception to delivery £100,000 GBP - Onsite WORKING - Location: Newcastle Upon Tyne, North East - United Kingdom Type: Permanent - This is a unique opportunity to be part of an exciting new business from the ground up, helping to shape the culture, drive innovation, and deliver cutting-edge solutions to complex business challenges. Why Join - The organisation pride
A newly established venture, backed by leading names in management consulting and global investment, is seeking outstanding Software Developers to join its growing team in the heart of Newcastle City Centre. Developers here are trusted to take ownership, work at pace, and tackle intellectually stimulating challenges while collaborating closely with colleagues and clients. * Ability to manage full lifecycle software development projects from inception to delivery £100,000 GBP - Onsite WORKING - Location: Newcastle Upon Tyne, North East - United Kingdom Type: Permanent - This is a unique opportunity to be part of an exciting new business from the ground up, helping to shape the culture, drive innovation, and deliver cutting-edge solutions to complex business challenges. Why Join - The organisation pride
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Azure Developer
Azure Developer
Queen Square Recruitment Limited
EC2N, City of London
From £500 to £600 per day inside IR35, DOE
Developer Azure Cosmos DB * Develop cloud-native applications using Azure Cosmos DB (SQL API, Mongo API) * Deep understanding of Azure services including Azure Functions, App Services, AKS, and Logic Apps * Hands-on experience with Azure Cosmos DB including query optimisation and throughput management - Location:Central London (hybrid) Contract Type:6 month initial contract, starting ASAP - Industry:Banking & Financial Services - Day rate:£500 - £600 (TBC, inside IR35) Our client, a large global consultancy, is seeking a Cosmos DBDeveloperto play a key role in designing and developingscalable, secure, and high-performance applicationstailored for thebanking and financial servicessector. This is a hands-on role where you willarchitect cloud-native solutionsusingAzure C
Developer Azure Cosmos DB * Develop cloud-native applications using Azure Cosmos DB (SQL API, Mongo API) * Deep understanding of Azure services including Azure Functions, App Services, AKS, and Logic Apps * Hands-on experience with Azure Cosmos DB including query optimisation and throughput management - Location:Central London (hybrid) Contract Type:6 month initial contract, starting ASAP - Industry:Banking & Financial Services - Day rate:£500 - £600 (TBC, inside IR35) Our client, a large global consultancy, is seeking a Cosmos DBDeveloperto play a key role in designing and developingscalable, secure, and high-performance applicationstailored for thebanking and financial servicessector. This is a hands-on role where you willarchitect cloud-native solutionsusingAzure C
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This client is looking to bring in a team of Software Engineers to work on a bespoke software platform as part of the business growth. You will be responsible for working on backend services, focusing on platform engineering and building CI/CD pipelines. * Developing backend software in Node.js and Typescript into a high load environment. * Minimum of 5 years as a Software Engineer. Leeds - 2x a week - Salary: £65k D.O.E - Fruition IT are working with a well-established tech-first business who are embarking on a complete technical transformation. You will be developing in Node. Js and Typescript, and will have a strong focus on AWS Services, such as EKS, Dynamo DB and S3. What will I be doing? * Turn concepts and requirements into a bespoke software platform. * Work closely with the agile teams to mee
This client is looking to bring in a team of Software Engineers to work on a bespoke software platform as part of the business growth. You will be responsible for working on backend services, focusing on platform engineering and building CI/CD pipelines. * Developing backend software in Node.js and Typescript into a high load environment. * Minimum of 5 years as a Software Engineer. Leeds - 2x a week - Salary: £65k D.O.E - Fruition IT are working with a well-established tech-first business who are embarking on a complete technical transformation. You will be developing in Node. Js and Typescript, and will have a strong focus on AWS Services, such as EKS, Dynamo DB and S3. What will I be doing? * Turn concepts and requirements into a bespoke software platform. * Work closely with the agile teams to mee
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Senior Guidewire Developer
Senior Guidewire Developer
Pioneer Search
City of London, London
£90000 - £110000 per annum + 20% bonus
An ACE Certified Guidewire Developer with experience with Guidewire for claims, and ClaimCenter configurations is required for a leading insurance organisation in London. Guidewire Developer - Ace Certified - The business is currently in the process of migrating to Guidewire and would be looking for a developer to lead them through the migration process and to monitor and configure the platform, as well as architect and design solutions being pioneered within the Guidewire Cloud. You should have strong development skills in Java and GOSU as well as stakeholder skills to help the organisation navigate the migration and onboard Guidewire. * Leadership: Leading the development, design, architecture, integration, and customisation of Guidewire for the insurer. * ACE Certified in Guidewire * Experience onboarding and integrating Guidewire for a specialty insurer
An ACE Certified Guidewire Developer with experience with Guidewire for claims, and ClaimCenter configurations is required for a leading insurance organisation in London. Guidewire Developer - Ace Certified - The business is currently in the process of migrating to Guidewire and would be looking for a developer to lead them through the migration process and to monitor and configure the platform, as well as architect and design solutions being pioneered within the Guidewire Cloud. You should have strong development skills in Java and GOSU as well as stakeholder skills to help the organisation navigate the migration and onboard Guidewire. * Leadership: Leading the development, design, architecture, integration, and customisation of Guidewire for the insurer. * ACE Certified in Guidewire * Experience onboarding and integrating Guidewire for a specialty insurer