Contract 'Open Source' Job Vacancies

17 of 17 Contract Open Source Jobs

DevOps AI Engineer- £750PD- Remote

London, South East, England, United Kingdom
Hybrid / WFH Options
Tenth Revolution Group
skills, with the ability to guide small, inexperienced client teams in a collaborative yet authoritative manner. You will play a key role in shaping and delivering solutions built on open-source technologies, data pipelines, vector stores, and Generative AI (GenAI) capabilities, with an emphasis on integrating Large Language Models (LLMs). Key Responsibilities Leadership & Collaboration: Lead and mentor … non-technical audiences. Build strong relationships with client stakeholders, ensuring alignment on objectives and expectations. Technical Delivery: Design, implement, and document end-to-end data and GenAI solutions using open-source and cloud-based components. Develop and maintain data pipelines, vector databases, and LLM integrations. Configure and optimize solutions on Microsoft Azure Cloud. Ensure adherence to best practices … Required Skills & Experience Proven ability to lead small technical or client teams. Excellent communication and presentation skills. Strong team player with a collaborative, mentoring mindset. Hands-on experience with open-source technologies across front-end and back-end systems. Proficiency in data pipelines, vector stores, and Generative AI/LLM implementations. Working knowledge of Microsoft Azure Cloud services More ❯
Employment Type: Contractor
Rate: £700 - £800 per day
Posted:

Java/JBOSS Developer

United Kingdom
Brightbox GRP Ltd
Java to use the new solution where required. - Update and/or change authentication mechanisms (Keycloak) and remove the JBoss integration. - Update the logging functionality to remove JBoss. - Identify open-source libraries that are in use to determine if they are JBoss specific. Where required, change these to non-JBoss open-source libraries. - Replace the existing More ❯
Employment Type: Contract
Rate: £550 per day
Posted:

Senior Go Developer

London, United Kingdom
Hybrid / WFH Options
Fruition Group
scale, data-driven applications Product-focused approach, ideally within fast-paced tech organisations (start-ups or scale-ups) Knowledge of Kafka, Cassandra, gRPC, and microservices is a strong advantage Open-source contributions are beneficial If you're a Senior Go Developer looking for a challenging 6-month contract with a forward-thinking tech company, apply today. We are More ❯
Employment Type: Contract, Work From Home
Posted:

Senior Backend Engineer

United Kingdom
Fruition Group
driven mindset and experience working in fast-moving, tech-focused organisations (e.g. start-ups or scale-ups) Additional skills with Kafka, Cassandra, gRPC, and microservices design are highly advantageous Open-source contributions are a plus This is an excellent opportunity for a Senior Backend Engineer who thrives on tackling technical challenges and wants to make a tangible impact. More ❯
Employment Type: Contract
Posted:

Front End Developer (Mobile Apps)

Shefford, Bedfordshire, South East, United Kingdom
Stackstudio Digital Ltd
for front-end code and processes. Participate in UI/UX design discussions and maintain graphic standards and branding. Work in an agile DevSecOps environment , utilizing modern frameworks and open-source libraries to enhance customer experience. Skills, Experience, and Abilities Required: Essential: Proven experience as a Mobile Front End Developer . 6+ years of experience with React Native More ❯
Employment Type: Contract
Rate: From £300 to £350 per day
Posted:

Senior Go Developer

London, United Kingdom
Fruition Group
core parts of the platform. You'll take ownership across the full development lifecycle, from system design and implementation to optimisation and release. You'll be working in an open, fast-moving environment where ideas get tested quickly and good engineering practices are taken seriously. If you like seeing your work go live within days - not weeks - you'll … and familiarity with working in technology-driven organisations or start-ups Experience with Kafka, Cassandra, gRPC, and microservices architecture will also be beneficial, as well as experience contributing to open-source projects If you're a Senior Go Developer looking for a fast-paced, collaborative contract role where your work will ship quickly and matter to real users More ❯
Employment Type: Contract
Posted:

Backend Software Engineer

United Kingdom
Fruition Group
driven mindset and experience working in fast-moving, tech-focused organisations (e.g. start-ups or scale-ups) Additional skills with Kafka, Cassandra, gRPC, and microservices design are highly advantageous Open-source contributions are a plus This is an excellent opportunity for a Backend Software Engineer who thrives on tackling technical challenges and wants to make a tangible impact. More ❯
Employment Type: Contract
Posted:

Backend Engineer

United Kingdom
Fruition Group
with working in technology-driven organisations or start-ups Hands-on skills in Kafka, Cassandra, gRPC, and microservices architecture will also be beneficial, as well as experience contributing to open-source projects If you're a passionate Backend Engineer who enjoys working autonomously, taking ownership, and building for impact in a high-trust, high-collaboration setting - apply now More ❯
Employment Type: Contract
Posted:

Senior Python Software Developer (SC Cleared)

United Kingdom
Hybrid / WFH Options
Certes IT Service Solutions
access to a variety of public sector data. Responsibilities include: You will work within a multi-disciplinary product team and lead the design, development, and maintenance of robust, scalable open data services and APIs Provide strategic technical leadership by setting software architecture, engineering practices, and technical direction across the team Define and evolve scalable, secure design patterns and coding … and cross-government platforms Collaborate with teams to select technologies, shape roadmaps, and deliver resilient, maintainable digital services that meet the programme goals Represent the department at technical forums, open-source communities, and government working groups Ensure delivery aligns with the Service Standard, Technology Code of Practice, and departmental governance processes Essential Skills & Experience required: As the Senior More ❯
Employment Type: Contract, Work From Home
Rate: £625 - £650 per day + Negotiable
Posted:

Senior Software Developer - Ruby

East London, London, United Kingdom
SUMMER-BROWNING ASSOCIATES LIMITED
contract (London or Manchester - hybrid) As a Senior Software Developer you'll: Work within a multi-disciplinary product team and lead the design, development, and maintenance of robust, scalable open data services and APIs Provide strategic technical leadership by setting software architecture, engineering practices, and technical direction across the Team Define and evolve scalable, secure design patterns and coding … standards and cross-government platforms Collaborate with teams to select technologies, shape roadmaps, and deliver resilient, maintainable digital services that meet programme goals Represent the department at technical forums, open-source communities, and government working groups Ensure delivery aligns with the Service Standard, Technology Code of Practice, and departmental governance processes Who you are: As a Senior Software More ❯
Employment Type: Contract
Rate: £600 - £650 per day + competitive
Posted:

GE Smallworld Solution Architect

Shefford, Bedfordshire, South East, United Kingdom
Stackstudio Digital Ltd
development teams throughout the build and implementation phases. Design and implement robust solutions, coordinating User Acceptance Testing (UAT) with business stakeholders. Develop responsive web applications using GSS, Java, and open-source technologies. Integrate GE Smallworld with external systems via REST APIs using GSS. Data Management Design and manage data update services for external integrations. Oversee data migration activities More ❯
Employment Type: Contract
Rate: From £500 to £550 per day
Posted:

Research Assistant

North London, London, United Kingdom
Hybrid / WFH Options
Lancesoft Ltd
AI agent frameworks such as Model Context Protocol (MCP) or LangChain. Exposure to large-scale software system architecture. Desirable: Direct experience in generative AI and LLM research. Experience with open-source AI libraries. Knowledge of SQL and database interaction. Hands-on experience with version control systems. More ❯
Employment Type: Contract
Rate: £42.79 per hour
Posted:

Data Scientist

Nationwide, United Kingdom
Hybrid / WFH Options
ISR RECRUITMENT LIMITED
tools such as Power BI, DAX and Power Query. Experience in data pipeline automation and data governance in large-scale environments (Desirable). Familiarity with modern AI frameworks and open-source toolkits (Desirable). Role and Responsibilities Design and implement data models and pipelines to support advanced analytics and reporting. Apply machine learning, natural language processing (NLP) and More ❯
Employment Type: Contract
Rate: £475 - £500/day (Outside IR35)
Posted:

Senior Android Developer

Bristol, Somerset, United Kingdom
Adroit People Ltd
of Kotlin/Java. Strong knowledge of Android SDK, Android UI design principles, patterns, and best practices Experience with offline storage, threading, and performance tuning Awesome knowledge of the open-source Android ecosystem and the libraries available for common tasks and benchmarking and optimisation Proficient in Google's Android design principles, click apply for full job details More ❯
Employment Type: Contract
Rate: GBP 350 Daily
Posted:

Senior Android Developer

Bristol, Avon, South West, United Kingdom
Adroit People Ltd
of Kotlin/Java. Strong knowledge of Android SDK, Android UI design principles, patterns, and best practices Experience with offline storage, threading, and performance tuning Awesome knowledge of the open-source Android ecosystem and the libraries available for common tasks and benchmarking and optimisation Proficient in Google's Android design principles, interface guidelines and code versioning tools, such More ❯
Employment Type: Contract
Rate: £350 per day
Posted:

PKI Architect - DV Cleared

Basingstoke, Hampshire, South East, United Kingdom
Experis
and patching mechanisms. Experience in Agile software development and delivery. Active Directory, secure networks, and system hardening expertise. Knowledge of scripting with tools such as Python and working with open-source products. This PKI Architect role is ideal for someone who thrives in a collaborative, fast-paced environment and is committed to technical excellence. To apply, please send More ❯
Employment Type: Contract
Posted:

Shopware System Administrator

United Kingdom
Careerwise
to ensure the Shopware environment delivers a smooth, secure, and high-performing experience for both customers and internal colleagues. Key Responsibilities Platform management: Install, configure, and maintain Shopware environments (open-source or cloud-based), ensuring optimal performance and uptime. Technical administration: Manage day-to-day operations of the platform, including integrations, plugins, permissions, and data flow between systems. More ❯
Employment Type: Contract
Rate: GBP Annual
Posted:
Open Source
10th Percentile
£336
25th Percentile
£413
Median
£513
75th Percentile
£623
90th Percentile
£738