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RESTful Jobs in London

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Looking for top RESTful jobs in London? Explore the best opportunities in software development, API design, and backend engineering on Haystack. Find your next London-based RESTful role today and advance your tech career with leading companies!

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AI Automation Engineer

AI Automation Engineer | Hybrid 3 days a week in office | London | PermanentA leading financial services client in London is seeking a talented AI Automation Engineer to join their team. Please see below for key details.Role Overview: Analyse and optimise business processes for automation whilst designing, building, and deploying intelligent automation solutions using BPA platforms (Appian), Machine Learning, and Generative AI to drive operational efficiency and innovation.Key Characteristics:

Process Analysis & Optimisation - Expert in analysing existing business processes through stakeholder interviews, process mapping, and workflow documentation to identify automation opportunities. Skilled in creating process flow diagrams, conducting time-motion studies, identifying bottlenecks and inefficiencies, and redesigning processes to be machine-readable and automation-ready using methodologies.

Python Development - Strong proficiency in Python programming including object-oriented design, asynchronous programming, error handling, and writing clean, maintainable code. Experience with key libraries including Pandas, NumPy for data manipulation, requests and APIs for integrations, asyncio for concurrent processing, and building robust automation scripts with proper logging, testing (pytest), and documentation.

AI & Machine Learning Frameworks - Deep expertise in AI/ML frameworks including TensorFlow, PyTorch, Scikit-learn, and Hugging Face Transformers. Experience building, training, and deploying machine learning models for classification, regression, clustering, and NLP tasks. Understanding of model evaluation metrics, hyperparameter tuning, feature engineering, and MLOps practices for production deployment.

Generative AI & LLM Integration - Proficient in working with Large Language Models including OpenAI GPT models, Anthropic Claude, Azure OpenAI, and open-source alternatives (Llama, Mistral). Experience with prompt engineering, fine-tuning, RAG (Retrieval Augmented Generation) architectures, vector databases (Pinecone, ChromaDB, FAISS), embeddings, and building AI-powered automation solutions that leverage natural language understanding.

Appian BPA Platform - Strong experience with Appian low-code platform including process modelling, interface design, expression rules, integration objects, and data modelling. Skilled in building end-to-end business process applications, configuring workflows, implementing business rules, managing records, and integrating Appian with external systems via REST APIs, web services, and connected systems.

API Development & Integration - Proficient in designing and building RESTful APIs using FastAPI, Flask, or Django REST Framework for exposing AI models and automation services. Experience with API authentication (OAuth, JWT), rate limiting, error handling, API documentation (Swagger/OpenAPI), webhooks, and integrating disparate systems to create seamless automated workflows.

Document Processing & OCR - Experience implementing intelligent document processing solutions using OCR technologies (Tesseract, Azure AI Document Intelligence, natural language processing for information extraction, document classification, and building end-to-end pipelines for automated document ingestion, processing, and data extraction with validation rules.

Robotic Process Automation (RPA) - Knowledge of RPA concepts and tools (UiPath, Automation Anywhere, Power Automate) for automating repetitive tasks, screen scraping, and Legacy system integration. Ability to assess when RPA vs. API integration vs. AI solutions are most appropriate, and experience building hybrid automation solutions combining multiple technologies.

Data Engineering & Pipeline Development - Strong skills in building data pipelines for AI/automation solutions including data extraction, transformation, and loading (ETL). Experience with SQL databases (SQL Server), data validation, cleansing workflows, scheduling tools (Azure Data Factory), and ensuring data quality for machine learning applications.

Machine Learning Operations (MLOps) - Experience deploying ML models to production environments using containerisation (Docker), orchestration (Kubernetes), model versioning (MLflow, DVC), monitoring model performance and drift, A/B testing frameworks, and implementing CI/CD pipelines for automated model training and deployment. Understanding of model governance, explainability, and compliance requirements.

Solution Architecture & Technical Design - Ability to design end-to-end automation architectures that combine multiple technologies (BPA, ML, GenAI, APIs) into cohesive solutions. Experience creating technical design documents, system architecture diagrams, assessing build vs. buy decisions, estimating effort and complexity, and presenting technical recommendations to both technical and non-technical stakeholders.

Stakeholder Collaboration & Change Management - Excellent communication skills for gathering requirements from business users, translating business needs into technical specifications, and demonstrating proof-of-concepts. Experience managing stakeholder expectations, conducting user acceptance testing, providing training on automated solutions, measuring automation ROI through KPIs (time saved, error reduction, cost savings), and driving adoption of intelligent automation across the organisation.

If you align to the key requirements then please apply with an updated CV.

Job Title: UI DeveloperLocation: Bromley Working Pattern: Full Time, Hybrid - 3 days in the office Contract Length: 12 months with potential for extending Daily rate: Circa 700per day via an UmbrellaAre you a passionate UI Developer looking to make an impact in the finance industry? Do you thrive on building modern, scalable, and user-friendly web interfaces? If so, we have an exciting opportunity for you to join our client’s dynamic team!About the Role:As a UI Developer, you will be at the forefront of developing innovative user interfaces for a cutting-edge Generative AI platform. Collaborating with talented professionals in Global Markets Sales & Trading and Quantitative Strategies, you will harness the power of data to drive insights and transform business processes.Key Responsibilities:

Design, develop, and maintain reusable UI components using React and TypeScript.

Implement responsive and accessible interfaces that meet enterprise standards (e.g., WCAG).

Collaborate with product managers, UX designers, and backend engineers to deliver high-quality features.

Integrate with RESTful APIs and manage application state using Redux Toolkit and RTK Query.

Incorporate Vercel AI SDKUI components to enhance chatbot functionality and user experience.

Ensure code quality through unit and integration testing with Vitest and React Testing Library.

Participate in code reviews and contribute to architectural decisions.

Optimize performance and troubleshoot issues across various browsers and devices.

What You Bring:Required Skills & Experience:

Experience developing modern web applications with React and TypeScript.

Expert knowledge in JavaScript/TypeScript

Strong understanding of component-based architecture and state management.

Hands-on experience in Python service-side development and APIs (e.g., FastAPI).

Familiarity with testing frameworks (Vitest, React Testing Library) and pytest for Python.

Experience with CI/CD tools and collaborative development workflows using Git/Bitbucket.

Non-Technical Skills:

Self-starter with excellent analytical and problem-solving abilities.

Detail-oriented and highly organised.

Strong communication skills to collaborate with business stakeholders and technical teams.

Adaptable to shifting and competing priorities.

Committed to delivering high-quality service.

Preferred Qualifications:

Experience with schema validation using Zod.

Familiarity with component documentation tools (e.g., Storybook).

Understanding of performance optimisation techniques for large-scale applications.

Experience developing frameworks and tools specific to AI/ML

Familiarity with cloud platforms and development in cloud environments.

Why Join Us?At our client’s organisation, you will enjoy a collaborative and inclusive workplace that values your contributions. They are committed to your professional growth and well-being, offering competitive benefits that support your physical, emotional, and financial health.This is more than just a job; it’s an opportunity to work on innovative projects that make a difference. You’ll be part of a team that believes in Responsible Growth, ensuring a positive impact on clients, communities, and shareholders.Ready to Make a Difference?If you’re excited about leveraging your skills in a fast-paced environment and contributing to a groundbreaking Generative AI platform, we’d love to hear from you!Apply Today!Join us in shaping the future of finance through technology and innovation. Your journey starts here!We use generative AI tools to support our candidate screening process. This helps us ensure a fair, consistent, and efficient experience for all applicants. Rest assured, all final decisions are made by our hiring team, and your application will be reviewed with care and attention.Pontoon is an employment consultancy. We put expertise, energy, and enthusiasm into improving everyone’s chance of being part of the workplace. We respect and appreciate people of all ethnicities, generations, religious beliefs, sexual orientations, gender identities, and more. We do this by showcasing their talents, skills, and unique experience in an inclusive environment that helps them thrive. If you require reasonable adjustments at any stage, please let us know and we will be happy to support you.

Software Engineer

Sanderson Government and Defence

Location: CheltenhamBusiness Unit: Central Government, Law Enforcement and National SecurityLevel: Mid-SeniorEmployment Type: PermanentClearance: Must hold active UK Security ClearanceAbout the OpportunityWe are partnering with a leading Engineering business seeking experienced Java Software Engineers to help deliver mission-critical capabilities that protect the UK’s security and prosperity. You will work at the intersection of advanced engineering and real-world problem-solving, developing cutting-edge products that counter evolving threats.Our teams work with leading technologies across AI/DS, Cyber, Cloud, DevOps/SRE, and Platform Engineering , supporting customers across the National Security, Defence and Intelligence community. With long-term programmes secured, this is an opportunity to join a high-growth environment with genuine impact.What You’ll Be DoingDesigning, developing, and maintaining secure, scalable Java applications and microservices using Spring Boot.Translating technical designs into clean, test-driven, production-ready code aligned with engineering best practices.Building and maintaining RESTful APIs and integrating them with databases, messaging systems, and external services.Supporting and evolving core architectural components, ensuring performance, reliability, and scalability.Collaborating with product, architecture, and engineering teams to deliver solutions aligned with user and business needs.Participating in Agile ceremonies and contributing to technical strategy, continuous improvement, and innovation.Key Skills & ExperienceStrong commercial experience with Java and Spring Boot in enterprise or microservices environments.Solid understanding of RESTful API design, service-oriented architectures, and integration patterns.Experience with relational and/or NoSQL databases and ORM frameworks such as JPA/Hibernate.Proficiency with automated testing frameworks and Test-Driven Development (TDD).Familiarity with Maven or Gradle and working across application, service, and data layers.Strong documentation and design discipline, with a curiosity for emerging Java and backend technologies.Why Join?You’ll be part of a trusted engineering organisation with over 60 years of heritage in sensors, communications, cyber, AI and ML. They solve complex challenges that make a tangible difference protecting people, platforms and missions, today and for the future.Reasonable Adjustments:Respect and equality are core values to us. We are proud of the diverse and inclusive community we have built, and we welcome applications from people of all backgrounds and perspectives. Our success is driven by our people, united by the spirit of partnership to deliver the best resourcing solutions for our clients.If you need any help or adjustments during the recruitment process for any reason , please let us know when you apply or talk to the recruiters directly so we can support you.TPBN1_UKTJ

Senior Java Engineer (Smart Contract)

Job Title: Senior Java Engineer (Smart Contract) Location: London Contract: 12 MonthsAre you a passionate Senior Java Developer looking to make a significant impact in an innovative environment? Our client is seeking a talented individual to join their dynamic team in London, where you’ll design and develop cutting-edge microservices for a next-generation loans processing application. If you thrive in a fast-paced atmosphere and enjoy collaborating with cross-functional teams, this opportunity is for you!What We’re Looking For:

Strong expertise in Java and Spring/Spring boot.

Hands on Smart Contract (Solidity) experience in essential

Experienced in financial services , Ideally Commercial Lons.

Experience in developing and deploying microservices architectures using Spring Boot, Spring Batch, and Spring Data

In-depth knowledge of REST API principles and HTTP protocols.

Proficiency in Git, CI/CD, and Agile methodologies.

Familiarity with JIRA, JUnit, and Apache Kafka is preferred.

Experience with NoSQL databases such as CosmosDB and MongoDB.

Exposure to Ethereum, Hyperledger Besu, and EVM-based platforms is a plus.

What You’ll Be Doing:

Collaborate with product owners, business analysts, scrum masters, and fellow developers to create robust solutions.

Design, develop, and implement microservices using Java Spring Boot, ensuring modular, testable, and reusable code.

Craft responsive and intuitive user interfaces with Angular and TypeScript/Java to enhance user experience.

Create RESTful APIs (gRPC) to facilitate smooth communication between microservices and external systems.

Conduct regular code reviews, unit testing, and CI to maintain high standards of code quality.

Develop and present high-level design proposals to stakeholders, showcasing your creativity and vision.

Manage project flow, help refine backlogs, and foster a culture of collaboration among team members.

Support your team in overcoming challenges and ensuring alignment with the project’s overall vision.

Why Join Us?

Exciting Projects: Work on impactful projects that shape the future of loans processing.

Collaborative Culture: Be part of a supportive team that values your input and encourages knowledge sharing.

Growth Opportunities: Expand your knowledge and skills in a fast-evolving tech landscape.

If you’re ready to take your career to the next level and make a real difference, we want to hear from you! Apply now and join our client’s team for an exciting journey in the world of microservices and innovative technology.Don’t miss out on this fantastic opportunity!Pontoon is an employment consultancy. We put expertise, energy, and enthusiasm into improving everyone’s chance of being part of the workplace. We respect and appreciate people of all ethnicities, generations, religious beliefs, sexual orientations, gender identities, and more. We do this by showcasing their talents, skills, and unique experience in an inclusive environment that helps them thrive. If you require reasonable adjustments at any stage, please let us know and we will be happy to support you.

Front End React Developer

Front End React Developer, React, Javascript, NW London to £75KA leading financial software company are looking for a Front End JavaScript developer who is proficient with React.js. The role is Offcie based in North West London, Your primary focus will be on developing user interface components and implementing them following well-known React.js workflows, specifically Redux and RTK. You will ensure that these components and the overall application are robust and easy to maintain. You will coordinate with the rest of the team working on different layers of the infrastructure. Therefore, a commitment to collaborative problem solving, sophisticated design, and quality product is important.Responsibilities

Developing new user-facing features using React.js

Building reusable components and front-end libraries for future use

Translating designs and wireframes into high quality code

Optimising components for maximum performance across a vast array of web-capable devices and browsers

Skills

Strong proficiency in JavaScript, including DOM manipulation and the JavaScript object model

Experience developing with typescript

Thorough understanding of React.js and its core principles

Experience with Redux and RTK (RTKQuery also a bonus)

Familiarity with RESTful APIs

Knowledge of modern authorization mechanisms, such as JSON Web Token

Familiarity with modern front-end build pipelines and tools (Github actions a bonus)

Experience with common front-end development tools such as Babel, Webpack, NPM, etc.

Ability to understand business requirements and translate them into technical requirements

A knack for benchmarking and optimization

Familiarity with git

Experience with React Native is a bonus

THIS ROLE IS OFFICE BASED

Senior Android developer - London - Perm

INFUSED SOLUTIONS LIMITED

Android DeveloperLocation: Central London (Onsite) Employment Type: Permanent Salary: £50,000 - £70,000 (DOE) Visa Sponsorship: Not availableWe’re working with a growing organisation based in Central London that’s looking to hire a Native Android Developer to join their mobile engineering team.This is a onsite role, ideal for someone who enjoys close collaboration, hands-on development, and working on high-quality Android applications in a fast-paced environment.The RoleYou’ll be responsible for designing, building, and maintaining native Android applications used by a large and growing user base. You’ll work closely with product managers, designers, and backend engineers to deliver reliable, high-performance mobile solutions.Key Responsibilities

Develop and maintain native Android applications

Build clean, scalable, and maintainable code

Collaborate with product, design, and backend teams

Participate in code reviews and technical discussions

Contribute to improving app performance, stability, and UX

Essential Skills & Experience

Commercial experience as a Native Android Developer

Strong experience with Kotlin (Java experience also beneficial)

Solid understanding of Android SDK and modern Android development practices

Experience with common Android architectures (MVVM or similar)

Experience integrating RESTful APIs

Strong problem-solving and communication skills

Nice to Have

Experience with Jetpack components

Knowledge of testing frameworks and CI/CD pipelines

Experience working in collaborative, onsite engineering teams

What’s On Offer

Salary between £50,000 - £70,000 depending on experience

Central London office location

Opportunity to work on meaningful, production-scale Android applications

Supportive team environment with room for growth

Apply NowIf you’re a Native Android Developer looking for a onsite role in Central London where you can continue to develop your skills and work on high-quality mobile products, we’d love to hear from you.

React Native Lead Developer

My leading Digital client are looking for a talented and motivated individual to provide technical leadership in designing, developing and maintaining their digital initiatives and application development as they venture into offering more services for consumers across multiple digital channels.You’ll ensure the current implementation of their digital solutions are in line with industry best practices and standards. Whilst also driving improvements in the design, processes & implementation to improve operational management, scalability, and extensibility.This is a newly created role for a growing business. An amazing opportunity!The following skills/experience is essential:

Strong React Native development background

Demonstrable experience delivering applications in both iOS and Android

GraphQL and Restful APIs

Solid understanding of the full mobile development life cycle

Good communication skills

Salary: Up to £95,000 + bonus + packageLocation: London (good work from home options available)If you are interested in this React Native App Lead position and meet the above requirements please apply immediately.

Senior PHP Backend Engineer- Perm - High-Performance FinTech

Senior PHP Backend Engineer- High-Performance FinTechLocation: Full RemoteEmployment: PermanentSalary: £120,000About the company:Join a lean, venture-backed product team building automation software that eliminates manual Back Office workflows in complex, traditional industries. The platform is scaling fast, and we’re looking for a Senior PHP Engineer to take ownership of core Back End services and performance-critical systems. You’ll work closely with product and leadership, shaping the roadmap and shipping features that reach thousands of business users.What you’ll do

Architect, build, and evolve robust Back End services and APIs in PHP with a strong focus on performance, scalability, and reliability.

Drive profiling and tuning for high-concurrency/low-latency environments; lead efforts on caching, queues, and database optimisation.

Implement best practices in security (including payment flows) and compliance (eg, PCI-DSS), championing code quality across the codebase.

Own API architecture & integrations, including resilient error handling, idempotency, and graceful retries; support two-way sync with external systems.

Collaborate cross-functionally on the product roadmap; contribute to engineering standards, testing discipline, and code reviews.

Tech environment:

PHP (modern) with async/event-loop concepts (eg, ReactPHP/FrameworkX), custom libraries, and clean, testable design.

APIs: RESTful services, two-way integrations, robust error handling & retry/backoff.

Performance: high concurrency, low latency, Redis caching, queues/delayed processing, microservices.

Data: MySQL with indexing and query optimisation; profiling for throughput. (

Security & payments: network security, payment gateways (eg, Stripe/PayPal/bank APIs), understanding of PCI-DSS.

Quality: unit/integration testing, reviews, and design patterns to ensure maintainable code.

What we’re looking for

A strong track record delivering complex, production-grade PHP backends.

Comfort operating at a senior level, owning major technical decisions and trade-offs.

Evidence of high-concurrency/scalability work and systematic performance optimisation.

Hands-on with Redis, queues (eg, delayed jobs, Kafka/RabbitMQ-style systems), and microservices.

API craftsmanship: REST standards, two-way sync, idempotency, error/compensation strategies.

Security & payments: experience integrating payment rails and working with PCI-DSS or similar.

Bonus points for open-source contributions or work on complex financial/latency-sensitive systems.

If you’re excited by complex problems, high-performance engineering, and real product impact, we’d love to hear from youGuidant, Carbon60, Lorien & SRG - The Impellam Group Portfolio are acting as an Employment Business in relation to this vacancy.

Senior C# Developer - Londin - Perm

Infused Solutions Ltd

Senior C# DeveloperLocation: London (Fully Onsite) Employment Type: Permanent Salary: 50,000 - 60,000 (DOE) Visa Sponsorship: Not availableWe’re working with a London-based organisation that is looking to hire an experienced Senior C# Developer to join their engineering team in a fully onsite position. This role is ideal for someone who enjoys hands-on development, working closely with the business, and taking ownership of complex systems.The RoleAs a Senior C# Developer, you’ll be responsible for designing, developing, and maintaining business-critical applications built on C#/.NET and SQL. You’ll play a key role in technical decision-making, improving code quality, and ensuring the reliability and performance of core systems.You’ll work closely with other developers, QA, product owners, and non-technical stakeholders, contributing across the full software development lifecycle.Key Responsibilities

Design, develop, and maintain applications using C# / .NET

Write, optimise, and maintain SQL queries, stored procedures, and database schemas

Contribute to technical architecture and system design discussions

Carry out code reviews and promote best development practices

Support and mentor junior and mid-level developers

Troubleshoot, debug, and improve existing systems

Collaborate closely with business and technical teams onsite

Essential Skills & Experience

Strong commercial experience as a Senior C# Developer

Advanced knowledge of C# / .NET

Strong experience working with SQL (SQL Server or similar)

Experience delivering and supporting production-grade applications

Solid understanding of software design principles and best practices

Comfortable working in a onsite London-based team

Strong communication and stakeholder engagement skills

Desirable Skills

Experience with modern .NET versions

Exposure to cloud platforms (Azure, AWS, or similar)

Experience with RESTful APIs

Familiarity with Agile / Scrum environments

What’s On Offer

Salary of 50,000 - 80,000 depending on experience

onsite role in London

Opportunity to work on business-critical systems

Collaborative, experienced engineering team

Long-term stability and career progression

Apply NowIf you’re a Senior C# Developer looking for an onsite role in London where you can have real technical ownership and work on complex systems, we’d love to hear from you.

Senior Android developer - London - Perm

Infused Solutions Ltd

Android DeveloperLocation: Central London (Onsite) Employment Type: Permanent Salary: 50,000 - 70,000 (DOE) Visa Sponsorship: Not availableWe’re working with a growing organisation based in Central London that’s looking to hire a Native Android Developer to join their mobile engineering team.This is a onsite role, ideal for someone who enjoys close collaboration, hands-on development, and working on high-quality Android applications in a fast-paced environment.The RoleYou’ll be responsible for designing, building, and maintaining native Android applications used by a large and growing user base. You’ll work closely with product managers, designers, and backend engineers to deliver reliable, high-performance mobile solutions.Key Responsibilities

Develop and maintain native Android applications

Build clean, scalable, and maintainable code

Collaborate with product, design, and backend teams

Participate in code reviews and technical discussions

Contribute to improving app performance, stability, and UX

Essential Skills & Experience

Commercial experience as a Native Android Developer

Strong experience with Kotlin (Java experience also beneficial)

Solid understanding of Android SDK and modern Android development practices

Experience with common Android architectures (MVVM or similar)

Experience integrating RESTful APIs

Strong problem-solving and communication skills

Nice to Have

Experience with Jetpack components

Knowledge of testing frameworks and CI/CD pipelines

Experience working in collaborative, onsite engineering teams

What’s On Offer

Salary between 50,000 - 70,000 depending on experience

Central London office location

Opportunity to work on meaningful, production-scale Android applications

Supportive team environment with room for growth

Python Developer - Equity Derivatives

Job Advertisement: Python Developer - Equity Derivatives - 13029Daily Rate: Negotiable via Umbrella Company Contract Length: 12 months with potential to extend Working Pattern: Full Time, Hybrid 2-3 days a week in the office Location: LondonAre you a passionate Python Developer eager to make an impact in the exciting world of Equity Derivatives? Our client is on the lookout for a dynamic mid-level developer to join their innovative team, dedicated to building a highly automated, fully Straight-Through Processing (STP) system that meets front-to-back business needs in the rapidly growing Structured Notes (SN) and Structured Products (SP) sectors.This is not just another job; it’s an opportunity to contribute to the evolution of cutting-edge technology and process automation solutions that will help drive significant growth!What You’ll Do:

Collaborate with a vibrant team including platform teams, sales, trading, structuring, and operations to achieve collective success.

Build applications, services, and tools aimed at automating pre-trade and post-trade activities, improving decision-making in the SN/SP landscape.

Optimize the Treasury workstream to enhance STP Rates and support diverse team requests.

Who You Are:

A tech-savvy individual with experience in Front Office equities derivatives systems. Previous experience with SN and SP is a bonus!

Equipped with a degree in Computer Science or a related field.

Proficient in designing and developing complex Server Side functionality in Python.

Familiar with SQL (preferably Oracle) and have basic Unix knowledge.

A self-starter who thrives in an agile environment and is adept at juggling multiple priorities.

Experienced within the financial services/banking sector

Key Responsibilities:

Gain a deep understanding of our entire technology stack.

Design and develop new features within existing Python services and create new services.

Participate in agile planning with team members and write acceptance tests in coordination with QA.

Provide Level 3 user support and engage effectively with business and platform partners.

Enhance our CI pipeline and deployment strategies.

Desired Skills:

Experience with modern web UI technologies like HTML5, React, RESTful services, and Websockets.

Knowledge of Structured Products (Notes, Warrants, Certificates) is advantageous.

Why Join Us?

Be part of the fastest-growing area in Equities Derivatives Technology.

Collaborate with talented professionals and drive significant business growth.

Enjoy a competitive daily rate that reflects your expertise and contributions.

If you’re ready to take on this challenge and make a difference, don’t hesitate to apply! Let’s innovate together and shape the future of Equity Derivatives.Apply Now!Join us in this exciting journey-your next big career move is just a click away!Please note we will be in touch within 48 hours if we have been shortlisted.Pontoon is an employment consultancy. We put expertise, energy, and enthusiasm into improving everyone’s chance of being part of the workplace. We respect and appreciate people of all ethnicities, generations, religious beliefs, sexual orientations, gender identities, and more. We do this by showcasing their talents, skills, and unique experience in an inclusive environment that helps them thrive. If you require reasonable adjustments at any stage, please let us know and we will be happy to support you.We use generative AI tools to support our candidate screening process. This helps us ensure a fair, consistent, and efficient experience for all applicants. Rest assured, all final decisions are made by our hiring team, and your application will be reviewed with care and attention.

Senior Golang Developer - Kubernetes - Financial Services

Rothstein Recruitment Ltd

+11

Excellent opportunity opens for an experienced Developer strong on Golang with experience in AWS and Kubernetes to join a highly regarded Financial Services entity’s London office. You will act as the team lead and play a key role in building mission-critical financial applications that power trading, investment, and risk management systems across the firm.If you are passionate about working in a dynamic, fast-paced environment and are eager to apply your technical expertise to the financial services industry, this is the role for you.Key Responsibilities:

Design, develop, and maintain high-performance Back End services using GoLang to support financial applications and services, including trading platforms, investment systems, and risk management tools.

Build and deploy cloud-based solutions using Amazon Web Services (AWS), including services such as EC2, S3, RDS, DynamoDB, and Lambda to create scalable, reliable, and secure infrastructure.

Implement and manage containerized applications using Kubernetes, ensuring seamless orchestration, scaling, and resilience in a cloud environment.

Write clean, efficient, and well-documented code while following best practices for financial systems development, focusing on performance and security.

Collaborate with other development teams, business analysts, and stakeholders to define and refine requirements, and ensure that applications meet financial regulatory standards and business needs.

Optimize the performance of Back End services, ensuring low-latency responses and high availability, critical for financial services.

Implement CI/CD pipelines, automated testing, and monitoring systems to ensure the reliability and stability of production systems.

Proactively identify issues and bottlenecks in existing systems and propose solutions to improve the system’s performance and scalability.

Stay updated with new tools, technologies, and industry trends in cloud computing, containerization, and financial systems to continuously improve development practices and outcomes.

Ideal Skills:

Proven experience (2+ years) in GoLang Back End development, with a strong focus on performance optimization and building scalable systems for high-volume, high-frequency financial applications.

Strong experience working with Amazon Web Services (AWS), including EC2, S3, RDS, DynamoDB, Lambda, and other cloud-native technologies.

Hands-on experience with Kubernetes for deploying, managing, and scaling containerized applications in a cloud environment.

Solid understanding of financial systems and services, particularly in areas such as trading platforms, investment management, and risk analytics.

Experience in building microservices architectures and working with APIs (RESTful, gRPC, etc.) to integrate various systems.

Strong knowledge of containerization (Docker) and continuous integration/deployment (CI/CD) practices.

Experience with database systems (relational and NoSQL) and working with financial data.

Familiarity with DevOps practices and tools to streamline the development life cycle, such as infrastructure-as-code (eg, Terraform or CloudFormation).

Ability to troubleshoot and resolve issues in production environments, ensuring uptime and performance in high-pressure, mission-critical scenarios.

Excellent communication skills to collaborate effectively with cross-functional teams and stakeholders in a fast-paced financial environment.

Experience with serverless computing (AWS Lambda, etc.) to create efficient and scalable solutions.

Knowledge of financial industry regulations and standards, particularly around data security and privacy.

Familiarity with event-driven architectures or message queues (eg, Kafka, RabbitMQ) for Real Time data processing.

Experience with automated testing frameworks and continuous delivery tools like Jenkins, GitLab CI, or CircleCI.

Understanding of performance monitoring and observability tools such as CloudWatch, Prometheus, or Datadog.

Interested? Please Apply!Golang Go AWS Kubernetes Terraform Bank Banking Finance Financial Services Crypto Blockchain Web3 Trading Exchange Digital Assets Hybrid Flexible Developer Software Engineer Backend Developer Golang Engineer Kafka Apache Kafka RabbitMQ AWS Lambda Cloud Platform

AWS Architect

ECM Selection (Holdings) Limited

Developing cloud infrastructure to facilitate healthcare researchLondon, remote or hybrid; 65k - 95k dep. on experienceUse your AWS expertise to build secure and scalable cloud infrastructure that will facilitate research and development within the healthcare sector!This company’s diagnostics visualisation platform allows medical researchers to visualise and analyse clinical data in order to develop new treatments that will massively improve the lives of patients. Key to this is the creation of secure multi-tenant and multi-region storage solution that allows swift and secure access to various types of data. Data security and integrity is of paramount importance, and the solution needs to be compliant with healthcare industry software standards.This role calls for strong AWS skills, rapid application development, and software development skills, a solid understanding of security aspects. You will also need excellent communication, collaboration, and organisational skills. Of prime importance is that you take a holistic, not just technical, view, and be proactive in reaching out to colleagues and clients to fully understand the product’s requirements, stakeholders, and how it sits within the company’s broader mission of creating world-leading software tools to further medical research.Reporting directly to the Technical Product Lead, you’ll be contributing to product architecture, designing and implementing services, and data pipelines; developing automated testing and CI/CD infrastructure.You will need:

A 1st or 2.1 in Computer Science, Engineering, or a similarly relevant discipline, and substantial commercial software engineering experience; to be au fait with Agile ceremonies, version control, and CI/CD, and software testing.

Solid expertise in developing and deploying microservices on AWS; knowledge of Infrastructure-as-Code; DevOps, and experience with NoSQL databases.

Demonstrably good coding skills, ideally in Java and / or Python; knowledge of RESTful APIs and service integration patterns and security frameworks such as OAuth 2.0 or OpenID Connect (OIDC).

You must have full, existing, and unrestricted right to work in the UK.

Not essential, but the following would be a bonus: Skills in containerisation/orchestration (Docker, Kubernetes etc.); IaC; DynamoDB; Spring Boot and Gradle; knowledge of standards such as ISO 13485 or IEC 62304.This role is predominantly remote, with occasional attendance of the company’s London office - you will therefore need to be based in the UK within a convenient travel distance. The role features an excellent salary, benefits package, and an option scheme. This is a great chance to make your mark in a company focussed on improving people’s lives.Another top job from ECM, the high-tech recruitment experts.Even if this job’s not quite right, do contact us now - we may well have the ideal job for you. To discuss your requirements call ecm or email your CV. We will always ask before forwarding your CV.Please apply (quoting ref: CV27559) only if you are eligible to live and work in the UK. By submitting your details you certify that the information you provide is accurate.

Technical Lead - Head of Engineering - 2 Days Peterborough or London

Our client is undertaking a bold technology transformation, modernising the systems that power one of the UKs leading media groups.Were looking for a hands-on Tech Lead moving into a Head of Engineering role or current Head of Engineering to lead this change from the front, a full-stack technologist who codes with confidence, architects with foresight, and inspires teams to deliver with purpose.Youll own the engineering direction across multiple domains; designing scalable cloud-native platforms, embedding DevSecOps excellence, and ensuring our technology foundation accelerates the business. DevSecOps would be desirable to have but so long as you have DevOps that is fine.This is a role for a technical leader who still builds, who thrives on solving complex problems, automating intelligently, and mentoring the next generation of engineers.Technology doesnt sit on the sidelines here, it drives their growth, their data, and their customer experience.Your Impact Define and execute the engineering strategy across Azure cloud, integration, and legacy modernisation, aligned to the clients long-term digital roadmap. Design and deliver cloud-native solutions that scale efficiently, perform reliably, and integrate seamlessly across business functions. Lead by example in Azure DevSecOps: create and manage pipelines (YAML), infrastructure-as-code (Bicep, Terraform), and container orchestration (AKS, Docker). Embed engineering best practice: implement CI/CD, code quality gates, automated testing, and observability from build to production. Guide platform evolution: re-engineer legacy .NET and SQL systems into modular, API-driven architectures. Build and empower teams: mentor full-stack, DevOps, and Automation Test engineers fostering autonomy, innovation, and accountability. Champion security and reliability by design: integrate compliance, performance, and monitoring into every stage of delivery. Collaborate widely: partner with Product, Data, and Infrastructure teams to ensure alignment between technology capability and commercial goals. Drive innovation: pilot emerging technologies (AI, automation, data services) that improve efficiency and insight.Your Technical ToolkitFrontend HTML5, CSS3, JavaScript (ES6+), TypeScript React.js (preferred), Angular, or Vue.js Responsive design (Bootstrap, Tailwind), state management (Redux, Context API) Front-end testing (Jest, React Testing Library, Cypress)Backend C#, ASP.NET Core / .NET 6+ RESTful and GraphQL APIs Entity Framework Core, LINQ Authentication & authorisation (OAuth2, JWT, Azure AD) Secure coding and API versioningData & Integration SQL Server, Azure SQL, Cosmos DB ORM optimisation, caching (Redis, Azure Cache for Redis) Data migration and ETL integration (APIs, pipelines)Cloud & DevSecOps Azure DevOps (Repos, Pipelines, Boards, Artifacts, Test Plans) CI/CD automation, gated releases, and environment governance Infrastructure-as-Code (Bicep, ARM, Terraform) Containerisation (Docker, AKS) and serverless (Azure Functions) Monitoring and observability (Application Insights, Log Analytics) Secrets management and vulnerability scanning (Key Vault, SonarQube, OWASP)Architecture & Design Microservices and event-driven design (Service Bus, Event Grid, Kafka) Domain-Driven Design (DDD) principles Resilient and scalable system patterns (circuit breakers, retries) Integration of legacy and modern platforms within hybrid environmentsWhat Success Looks Like 8+ years in software engineering, with deep full-stack and cloud experience. Proven record of leading engineering teams through modernisation or platform rebuilds. Hands-on mastery of Azure DevOps and enterprise-scale CI/CD, DevSecOps highly desirable Excellent architectural judgement balancing delivery speed, stability, and cost efficiency. Track record of developing high-performing, collaborative technical teams. Strong communication and leadership presence able to influence peers and executives alike. A continuous learner, passionate about automation, clean code, and scalable design.Your Journey with the company: We believe great leaders inspire by doing. From your first week, youll work alongside engineers, architects, and data specialists shaping not just what we build, but how we build it. Youll have open access to the leadership team, visibility into our transformation roadmap, and the chance to leave a lasting mark on how technology powers the business.The role can be based 2 days a week out of London (City Area) or Peterborough and the rest remote. If London then occasional trips to PeterboroughTPBN1_UKTJ

Golang Software Engineer (GO - FinTech)

Golang Software Engineer - FinTech Scale-Up Location: London (Hybrid) Level: Mid-Senior About Us: We’re a mature FinTech start-up revolutionizing financial services with cutting-edge technology. Backed by leading investors and operating at scale, we combine the agility of a start-up with the stability of an established business. The Role: We’re seeking a Golang Software Engineer to join our growing engineering team. You’ll design and build high-performance, scalable systems that power our core financial products. This is a hands-on role where you’ll work on complex challenges in distributed systems, APIs, and real-time data processing. Key Responsibilities: Develop and maintain backend services in Go (Golang). Design scalable, secure, and performant architectures for financial applications. Collaborate with product and DevOps teams to deliver robust solutions. Optimize systems for low latency and high throughput. Contribute to code reviews, testing, and continuous improvement.What We’re Looking For: Strong experience in Golang development. Solid understanding of microservices architecture, RESTful APIs, and distributed systems. Familiarity with cloud platforms (AWS, GCP, or Azure) and containerization (Docker/Kubernetes). Knowledge of CI/CD pipelines and modern DevOps practices. Experience in high-performance systems or financial services is a plus.Nice to Have: Exposure to event-driven architectures and messaging systems (Kafka, RabbitMQ). Interest in FinTech and financial markets. Apply now to avoid disappointment To find out more about Huxley, please visit Huxley, a trading division of SThree Partnership LLP is acting as an Employment Business in relation to this vacancy | Registered office | 8 Bishopsgate, London, EC2N 4BQ, United Kingdom | Partnership Number | OC(phone number removed) England and Wales

Golang Software Engineer (GO - FinTech)

Develop and maintain backend services in Go (Golang).

Design scalable, secure, and performant architectures for financial applications.

Collaborate with product and DevOps teams to deliver robust solutions.

Optimize systems for low latency and high throughput.

Contribute to code reviews, testing, and continuous improvement.

What We’re Looking For:

Strong experience in Golang development.

Solid understanding of microservices architecture, RESTful APIs, and distributed systems.

Familiarity with cloud platforms (AWS, GCP, or Azure) and containerization (Docker/Kubernetes).

Knowledge of CI/CD pipelines and modern DevOps practices.

Experience in high-performance systems or financial services is a plus.

Nice to Have:

Exposure to event-driven architectures and messaging systems (Kafka, RabbitMQ).

Interest in FinTech and financial markets.

Apply now to avoid disappointmentTo find out more about Huxley, please visit (url removed)Huxley, a trading division of SThree Partnership LLP is acting as an Employment Business in relation to this vacancy Registered office 8 Bishopsgate, London, EC2N 4BQ, United Kingdom Partnership Number OC(phone number removed) England and Wales

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