60 backend engineer jobs found

Senior Backend Engineer (Contractor) On-site Full time Methods Business and Digital Technology Limited Methods is a £100M+ IT Services Consultancy who has partnered with a range of central government departments and agencies to transform the way the public sector operates in the UK. Established over 30 years ago and UK-based, we apply our skills in transformation, delivery, and collaboration from across the Methods Group, to create end-to-end business and technical solutions that are people-centred, safe, and designed for the future. Our human touch sets us apart from other consultancies, system integrators and software houses - with people, technology, and data at the heart of who we are, we believe in creating value and sustainability through everything we do for our clients, staff, communities, and the planet. We support our clients in the success of their projects while working collaboratively to share skill sets and solve problems. At Methods we have fun while...

Senior Backend Engineer (Contractor) On-site Full time Methods Business and Digital Technology Limited Methods is a £100M+ IT Services Consultancy who has partnered with a range of central government departments and agencies to transform the way the public sector operates in the UK. Established over 30 years ago and UK-based, we apply our skills in transformation, delivery, and collaboration from across the Methods Group, to create end-to-end business and technical solutions that are people-centred, safe, and designed for the future. Our human touch sets us apart from other consultancies, system integrators and software houses - with people, technology, and data at the heart of who we are, we believe in creating value and sustainability through everything we do for our clients, staff, communities, and the planet. We support our clients in the success of their projects while working collaboratively to share skill sets and solve problems. At Methods we have fun while...

Senior Backend Engineer (Contractor) On-site Full time Methods Business and Digital Technology Limited Methods is a £100M+ IT Services Consultancy who has partnered with a range of central government departments and agencies to transform the way the public sector operates in the UK. Established over 30 years ago and UK-based, we apply our skills in transformation, delivery, and collaboration from across the Methods Group, to create end-to-end business and technical solutions that are people-centred, safe, and designed for the future. Our human touch sets us apart from other consultancies, system integrators and software houses - with people, technology, and data at the heart of who we are, we believe in creating value and sustainability through everything we do for our clients, staff, communities, and the planet. We support our clients in the success of their projects while working collaboratively to share skill sets and solve problems. At Methods we have fun while...

Mindera is looking for a Java Engineer with hands-on experience in OpenTelemetry (OTEL) to join our backend engineering team. You’ll play a key role in designing, building, and instrumenting high-performance Java services. Requirements Design, develop, and maintain scalable Java-based microservices and backend systems. Implement observability best practices using OpenTelemetry (OTEL) for tracing, metrics, and logging. Collaborate with platform and DevOps teams to integrate telemetry data with systems such as Grafana, Prometheus, Jaeger, or Tempo . Define and maintain instrumentation standards across Java applications to ensure consistency and performance visibility. Diagnose complex production issues through telemetry data and performance profiling. Contribute to architectural discussions on service design, distributed systems, and monitoring strategy. Write clean, efficient, and testable code following best practices in CI/CD and...

Mobile Engineer Contractor (Flutter) Remote: Europe, United Kingdom +/-2 hours to UK Time Salary: £600-650 day rate (or equivalent in local currency) 1-3 month contract, with opportunity for extension or full-time work   About Aurora Aurora is the lifestyle operating system for the world's leading post-exit founders, athletes and creatives. Our mobile app empowers ultra-high-performance individuals and their teams to master their relationships, exploration and longevity across 5 lifestyle categories; travel, dining, experiences, luxury goods, and longevity. To date, we have: xe2 x81 xa0 xe2 x81 xa0raised $4m in funding from Tier 1 investors and entrepreneurs, including the founder of Velocity Black, early investors in Supercell & Deliveroo, the founder of Cleo and the President of VistaJet xe2 x81 xa0 xe2 x81 xa0 xe2 x81 xa0achieved industry-leading engagement with our paying customers, with an extensive member waiting list wanting...

Mindera is looking for a Java Engineer with hands-on experience in OpenTelemetry (OTEL) to join our backend engineering team. You’ll play a key role in designing, building, and instrumenting high-performance Java services. Requirements Design, develop, and maintain scalable Java-based microservices and backend systems. Implement observability best practices using OpenTelemetry (OTEL) for tracing, metrics, and logging. Collaborate with platform and DevOps teams to integrate telemetry data with systems such as Grafana, Prometheus, Jaeger, or Tempo . Define and maintain instrumentation standards across Java applications to ensure consistency and performance visibility. Diagnose complex production issues through telemetry data and performance profiling. Contribute to architectural discussions on service design, distributed systems, and monitoring strategy. Write clean, efficient, and testable code following best practices in CI/CD and...

Mindera is looking for a Java Engineer with hands-on experience in OpenTelemetry (OTEL) to join our backend engineering team. You’ll play a key role in designing, building, and instrumenting high-performance Java services. Requirements Design, develop, and maintain scalable Java-based microservices and backend systems. Implement observability best practices using OpenTelemetry (OTEL) for tracing, metrics, and logging. Collaborate with platform and DevOps teams to integrate telemetry data with systems such as Grafana, Prometheus, Jaeger, or Tempo . Define and maintain instrumentation standards across Java applications to ensure consistency and performance visibility. Diagnose complex production issues through telemetry data and performance profiling. Contribute to architectural discussions on service design, distributed systems, and monitoring strategy. Write clean, efficient, and testable code following best practices in CI/CD and...

Join Us at SRT Marine Systems as a Contract Android App Developer Job Title: Android App Developer Location: Remote/Hybrid/On-site Job Type: Contract, Full-Time Duration: 6mths initially Status and Rate: Outside of IR35, day rate. SRT Marine Systems plc (SRT) are a market leader in its domain of international marine surveillance technology and systems. We are respected, established and an ambitious multi-national company headquartered in the UK with a global customer base. The company has a global impact in the marine domain by leading the next generation of maritime domain awareness technologies, products and systems that significantly enhance, security, safety and environment protection and sustainability. Our customers are worldwide and range from the largest national coast guards to individual vessel owners. SRT is an exciting company where high quality results are rewarded. We are ambitious and are constantly seeking to innovate to deliver better products and services...

Description We are seeking a hands-on AI Solutions Engineer (Freelance) to support the development and deployment of internal AI-powered systems used by Syneos Health Communications teams. This role is focused on designing, developing, and deploying AI-enabled solutions that support daily work across PR, advertising, medical communications, and related business units. The freelancer will work with the Innovation Team to translate business unit requirements into working, production-ready AI systems, adapting existing code where available and originating new code where required. A key responsibility will be progressing these builds through to secure hosting on Azure. Key Responsibilities Internal AI Build Development Design and develop AI-powered internal systems based on business unit requirements Adapt and extend existing internal codebases where available Originate new Python-based solutions where no existing code exists Experience with...

Noble Panacea is a new revolutionary skincare brand founded by Nobel Laureate Sir Fraser Stoddart and launched in October 2019. The ground-breaking OSMV™ Technology at the core of the brand enables transformational efficacy and precision. We create deep respect & intention by adhering to the global principles of green chemistry. We take our commitment to nature and sustainability to all stages of product development, from R&D to packaging. Ultimately, we strive to promote absolute skin health by empowering all who seek authentic, natural, and ageless beauty.  We are seeking a Senior Frontend Engineer to take a lead role in shaping the next generation of our global e-commerce experience. You'll be key in our migration to BigCommerce's Catalyst framework and responsible for front-end performance.  You will collaborate closely with Product, Design, and Engineering leadership to create elegant, performant, and maintainable front-end solutions for our...

Full Stack Engineer (For temp workers) Posted Jan 14, 2026   About the Department Our Cars business is one of the cornerstones of the connected trip. We aim to offer the best and most convenient car rental and ground transport options to every customer – whether they start their trip by booking a car or complement an existing journey with one. We do this by delivering a best-in-class user experience and building products that remove friction from finding, comparing, and booking the right car, at the right time, for every kind of traveller. Cars Search Experience Team The Cars Search Experience team is looking for a skilled engineer to help us improve how customers discover and select car options across Booking.com. We are responsible for the core search journey in Cars – from handling search requests and surfacing relevant results, to powering sorting, filtering, and experimentation that drives conversion and...

hiring experienced Python Engineers to support a variety of high-impact research collaborations with leading AI labs. Freelancers will help improve AI systems through work extending coding benchmarks that reflect real-world development across diverse languages and domains. This is a unique opportunity to apply your engineering expertise toward shaping the next generation of intelligent systems. Key Responsibilities Develop and validate coding benchmarks in Python by curating issues, solutions, and test suites from real-world repositories Ensure benchmark tasks include comprehensive unit and integration tests for solution verification Maintain consistency and scalability of benchmark task distribution Provide structured feedback on solution quality and clarity Debug, optimize, and document benchmark code for reliability and reproducibility Ideal Qualifications 3–10 years of experience as a backend software engineer, ML engineer,...

We are seeking a passionate Software Engineering Manager who will provide technical expertise, ship thoughtfully and operate with excellence. Being creative, curious, and confident, you will be an integral part of our empowered, self-managing, multi-disciplinary engineering teams - designing, building, releasing, and maintaining products. You will play a key role in driving our ambition to create a best-in-class software engineering team, environment, and culture. This is an initial 6 month contract (outside IR35) that requires you to work on client site 3 days a week in London, Paddington. Requirements   Your key accountabilities will include: Team Management: Build, mentor, and manage a high-performing software engineering team. Foster a culture of collaboration, innovation, and continuous improvement within the team. Facilitate communication and collaboration among team members. Ensure budgets, people and resource allocation, and workload,...

Who Are We? Xcelirate develops technologically-advanced platforms which are accessed by thousands of users every minute! We are proud to offer a workplace where the sharpest developers come together to strategically plan and swiftly execute practices which see us maintain our existing market dominance and attain global expansion. We owe our success to our customers who have seen us grow across a decade, and our talented team who have made that growth possible!   What are we looking for? You're a full-stack dev - you've been around the block, and you know your way through both backend trenches and frontend battlefields. PHP? Still your reliable sidekick. JavaScript? Sometimes a mischievous friend, sometimes a chaos gremlin, but you've learned how to keep it in line. You work best with fierce independence. You don't need hand-holding - you're the one who does the hand-holding when it's needed. You don't wait for direction; you are the direction. To twist a phrase:...

Required Core Skills: AWS Cloud services with Python, AWS Lambda, DynamoDB, RDS, AppSync, RESTful APIs 1. AWS Cloud services with Python and its frameworks such as Django on the backend 2. Cloud - AWS such as Lambda, DynamoDB, RDS, AppSync. 3. Experience working with RESTful APIs and/or GraphQl 4.Good understanding of development best practices such as pair programming, TDD 5. Work in an agile Minimum years of experience: 8 to 10 Years Job Type: Freelance Pay: £300.00-£350.00 per day

We are looking for a Principal Full-Stack Engineer to take technical ownership across backend and frontend development, shaping high-quality, scalable solutions and setting engineering standards for the team. This role combines hands-on delivery with technical leadership, mentoring, and close collaboration with product and platform teams. You will work across modern backend services built in Kotlin, rich frontend applications using React and Next.js with TypeScript, and cloud-native infrastructure on Azure or AWS.   This is an initial 6 month contract (outside iR35) that requires you onsite in London Paddington 3 days a week.   Key Responsibilities Lead the design and development of full-stack solutions, balancing backend robustness with high-quality user experiences Build and maintain backend services using Kotlin , following clean architecture and best practices Develop modern, performant frontends using React, Next.js, and...

Senior Java/React Full Stack Developer Location: London or Newcastle, UK (Hybrid - ~1 day per week in office / onsite) Contract: Contract - 6 months with view to extend Day Rate: £550–£600 per day - Outside IR35 About Appvia Appvia is a specialist cloud, platform, and solutions engineering consultancy. We help organisations modernise software systems, improve developer productivity, and adopt cloud-native practices that enable long-term, sustainable delivery. Our software engineering work focuses on modern application development, domain-driven design, and improving delivery outcomes through better architecture, testing, and developer experience. About the Role We are looking for a Senior Java/React Full Stack Developer to join Appvia on a contract basis, working as a hands-on engineering consultant within our Solutions Engineering team. This role is focused on modernising large, complex software systems, reducing technical debt,...

Delivering scalable data infrastructure that transforms manual financial and actuarial processes into automated, auditable workflows. To deliver robust, scalable backend systems and data infrastructure that power automated data pipelines and dashboards for our global life reinsurance client in Bermuda.   Hands on Experience:   Designing and implementing data warehouse schemas in cloud environments (BigQuery preferred) Building reconciliation and data quality frameworks for financial data Creating dashboards and data visualisations for business stakeholders Working with financial instrument identifiers (ISIN, CUSIP), rating agencies, and cross-system data mapping Requirements Must Have Experience:   4+ years experience in data engineering or data architecture roles Strong SQL skills with experience designing data warehouse schemas (BigQuery, Snowflake, or similar) Proven experience with dbt for data...

Senior Back End Engineer (Python & GCP) Delivering scalable data infrastructure that transforms manual financial and actuarial processes into automated, auditable workflows. To deliver robust, scalable backend systems and data infrastructure that power automated data pipelines and dashboards for our global life reinsurance client in Bermuda.   Hands On Experience:   Building production Python applications with strong software engineering practices Designing and implementing distributed, large-scale systems Architecting solutions from scratch across the full development lifecycle Working with event-driven architectures and data pipelines Requirements Must Have:   4+ years production experience with Python including modern frameworks, testing, and deployment practices Proven experience designing and building distributed systems at scale Strong system architecture skills with ability to translate...

Contract Remote Role Description As an hourly paid, fully remote Rust Engineer for AI Data Training, you will review AI-generated Rust code and explanations or generate your own, evaluate the reasoning quality and step-by-step problem-solving, and provide expert feedback that helps models produce answers that are accurate, logical, and clearly explained. You will assess solutions for correctness, safety, and adherence to the prompt; identify errors in ownership, borrowing, lifetimes, or algorithmic reasoning; fact-check information; write high-quality explanations and model solutions that demonstrate idiomatic Rust patterns; and rate and compare multiple AI responses based on correctness and reasoning quality. This role is with, a fast-growing AI Data Services company and subsidiary of that provides AI training data for many of the world’s largest AI companies and foundation model labs. Your work will directly help improve the world’s premier AI models...