Freelancer UK
  • All Jobs
  • Outside IR35
  • Agencies
  • Post a Job
  • Pricing
  • Guides
  • Sign in
  • Sign up
  • All Jobs
  • Outside IR35
  • Agencies
  • Post a Job
  • Pricing
  • Guides

Email me jobs like this

Email me jobs like this
Refine Search
Search within
50 miles
10 miles 20 miles 50 miles 100 miles 200 miles
Refine by IR35 Status
Unknown Status 14 Inside IR35 11 Outside IR35 1
Refine by Categories
Engineering 221 Construction 79 Manufacturing 15 Other 10 Management 8 Admin-Clerical 7
Automotive 3 Finance 3 Human Resources 3 Marketing 3 Legal 2 Sales 2 Science 2 Facilities 1 General Labor 1 Government 1 Health Care 1
More
Refine by Job Type
Contractor 26
Information Technology Chelmsford engineering

26 engineering jobs found in Chelmsford

CL
May 16, 2026  
Lead Firmware Engineer
Lead Firmware Engineer Basildon 6-Month Contract Paying up to £74p/h (Inside IR35) Key Responsibilities Firmware requirements capture and management. FPGA design and analysis. Production of documentation for other engineers and evidence for design reviews. Development of FPGA test and FPGA integration plans. Perform system integration work with PCB designers and embedded software engineers. Support all firmware designs through the company's firmware process - training will be given. Modification of existing firmware designs and test benches. Essential Skills & Experience Using FPGA technologies, especially from either Xilinx, Microsemi (Actel) or Lattice and their tools. Advanced verification techniques using either VHDL or System Verilog/ UVM. Specifying complex timing and area constraints for efficient FPGA place and route. Ability to analyse system-level requirements and derive detailed Firmware requirements. A methodical approach to the full firmware design...
IR35 Status:
Inside IR35

CV-Library Basildon, Essex Contractor
CL
Apr 17, 2026  
Functional Safety Systems Engineer
RLE International is working on behalf of their Essex based Automotive Client, who are currently looking for a Functional Safety Systems Engineer to support their team. Position Description: Rate: £29.59 (via Umbrella PAYE) – increasing to £38.38 after 12 weeks under AWR’s (Agency Worker Regulations) Our client is seeking a Functional Safety Systems Engineer to join their core team in the Essex. You will be a key player in ensuring complex, distributed technologies including powertrain, infotainment, and active safety meet the highest safety standards. Using Model-Based Systems Engineering (MBSE), you will bridge the gap between research and production, turning "what if" into "what’s next." As a key member of an exciting team leading Functional Safety activities in Product Development, this role involves working with technology subject matter experts to conduct Functional Safety analysis using efficient model-based systems engineering (MBSE / SysML) tools. Additionally, you will...
IR35 Status:
Inside IR35

CV-Library Basildon, Essex Contractor
CL
May 23, 2026  
ML Engineer
Role: ML Engineer Type: 12 months Contract Location London, UK(2 days per week) We are looking for a high-caliber AI Engineer to join a global leader in the Insurance and Fintech space. You won't just be building chatbots; you will be designing and orchestrating Autonomous Agentic Systems that reason, plan, and execute complex workflows. This is a unique opportunity to work at the intersection of Generative AI and robust software engineering, applying cutting-edge LLM techniques to high-stakes, real-world data. What You'll Be Doing Agentic System Design: Build intelligent AI agents capable of autonomous task execution using LLMs and advanced reasoning frameworks. LLM Specialization: Implement RAG (Retrieval-Augmented Generation) pipelines and fine-tune models using PEFT/LoRA to create domain-specific insurance experts. Production Engineering: Design and maintain robust ETL/ELT pipelines and manage the lifecycle of models using Docker, Kubernetes, and CI/CD. Responsible AI:...
IR35 Status:
Unknown Status

CV-Library City of London, London Contractor
CL
May 22, 2026  
React Front End Developer
Currently looking for a React Front End Developer for one of our clients in London. As a Custom Software Engineer, you will be responsible for developing custom software solutions to design, code, and enhance components across systems or applications. You will use modern frameworks and agile practices to deliver scalable, high-performing solutions tailored to specific business needs. You are expected to be a subject matter expert, collaborate and manage the team to perform effectively, take responsibility for team decisions, engage with multiple teams, and contribute to key decisions. Providing solutions to problems within your immediate team and across multiple teams is a critical part of this role. Advanced proficiency in React.js is required. Intermediate proficiency in Software Design & Solutions and Software Engineering is suggested, along with advanced proficiency in React Native. Take ownership of specific software components and ensure their quality and...
IR35 Status:
Unknown Status

CV-Library City of London, London Contractor
CL
May 20, 2026  
Senior Golang Engineer
Senior Software Engineer - Golang Information Security £650 per day - Inside IR35 3 days per week on-site, 2 days WFH 3 Month rolling contract up to 2 years Job Summary The Information Security team is responsible for developing services to find and mitigate security risks faced. We are seeking an extraordinary Software Engineer who is passionate about security and can thrive in a fast-paced environment where both individual drive and team collaboration are the keys to success. As part of the Information Security team, you'll be at the forefront of developing cutting-edge services to identify and mitigate security risks. This is a technical hands-on role that is focused on security across all of the organisation. You'll be working to identify problems, establish a vision for how to address those problems, and unite the relevant owners within the business on achieving that vision. Description In this role you will architect and develop distributed and scalable services...
IR35 Status:
Inside IR35

CV-Library City of London, London Contractor
CL
May 23, 2026  
Python Developer
Title: P&L Python developer Location: London, UK Type: Contract These will support core engineering streams, unblock current bandwidth constraints, and ensure continued delivery momentum within a fixed multi-year funding envelope. * 5+ years of strong Python development experience (optional Java) with demonstrable experience of having designed and developed complex server-side components. * Experience working in Financial Services specifically within markets in front office derivatives risk systems or pretrade/origination or post trade management systems. * Computer science or equivalent degree * Good understanding of Agile and Lean software development practices and associated tools * Preference for software engineers with strong finance/Risk/P&L domain knowledge, rather than heavy “pure quants”. * Ability to work in a fast paced environment liaising with demanding stakeholders to understand complex requirements, and be able to prioritize and work on...
IR35 Status:
Unknown Status

CV-Library Bromley, Greater London Contractor
CL
Apr 08, 2026  
Senior Data Engineer
Senior Data Engineer – (Tick data, Time-Series; kdb+ / Q ) 3-6 months initially. London 3 days onsite   Are you a Data Engineer with a background in systematic trading who has worked with granular tick market data? Have you built pipelines to allow tick data to be ingested into a time series tech stack utilising kdb+ and Q? If so keep reading!   Certain Advantage are recruiting on behalf of our London based trading client for a Data Engineer to focus on building a scalable data platform for algorithmic trading.   You’ll Identify and implement solutions for Quants and Traders, providing data that will be used to improve strategies performance and produce clients TCA, pre- and post- trade analytics.   Your Project Work: Identify and implement solutions to provide data that will be used to improve strategies performance and produce clients TCA, pre- and post- trade analytics. Work with business Stakeholders to build new and maintain existing real-time and historical data services and...
IR35 Status:
Unknown Status

CV-Library Central London, London WC2N 5DU, UK Contractor
CL
May 23, 2026  
Data Scientist
Product Data Scientist Location: Remote - UK Type of role- 6 Months contract with potential extension Payrate - £498 - £679 Per Day Inside IR35 We're hiring a Data Scientist to join a globally recognised audio streaming platform, supporting their experimentation and analytics ecosystem. This is a fantastic opportunity to work on a high-impact product used to power A/B testing and data-driven decision-making at scale. This role sits within a fast-paced analytics team and is focused on hands-on data analysis, experiment monitoring, and stakeholder reporting rather than machine learning or research work. What you'll be doing: Build and maintain dashboards tracking experiment performance and platform adoption Analyse A/B tests, ensuring data quality, validity, and actionable insights Perform deep-dive and ad-hoc analysis on experiment health and user behaviour Work closely with product, engineering, and data teams to support decision-making Translate complex data into clear,...
IR35 Status:
Inside IR35

CV-Library London, UK Contractor
CL
May 23, 2026  
Backend Engineer
Senior Backend Engineer (Security Compliance) - 100% Remote The Role Join a high-autonomy team as a senior contractor architecting the next generation of our security compliance platform. You will own technical decisions end-to-end, building systems that ensure every production code change meets regulatory standards across thousands of repositories What You'll Do Architect & Build: Develop Java-based backend services (Spring Boot, Apollo) to enforce compliance controls within a GitHub Enterprise environment. Must have Skillset: Java, Springboot, GCP, GKE Who You Are Expert Developer: Java experience (Spring Boot, Bazel, Maven) with a focus on distributed services and Kubernetes (GKE). System Designer: Strong skills in API design (gRPC, GraphQL, REST) and relational databases like PostgreSQL. Cloud Proficient: Hands-on experience with GCP services, including BigQuery and Cloud SQL. Security Minded: Experience with (or strong interest in) security compliance engineering...
IR35 Status:
Unknown Status

CV-Library London, UK Contractor
CL
May 23, 2026  
ML Lead - London, UK
Role: ML Lead Type: 12 Months Contract Location: London, UK Working Model: Hybrid (2 days per week in office) Payrate: (Apply online only) GBP/day on Inside IR35 on Umbrella The Role: We are seeking an ML Lead to manage our team and spearhead the design and deployment of cutting-edge Agentic Systems and LLM applications. Key Responsibilities: Team Leadership: Manage the ML team and collaborate with data scientists, software engineers, and business stakeholders. LLM & Agent Development: Build autonomous AI agents, implement Retrieval-Augmented Generation (RAG) pipelines, and fine-tune LLMs using PEFT techniques like LoRA. Data Engineering: Design and maintain robust ETL/ELT pipelines to process structured and unstructured data. MLOps & Infrastructure: Automate CI/CD pipelines, manage cloud/container infrastructure (Docker, Kubernetes), and oversee secure model deployment and performance monitoring. Responsible AI: Build trustworthy AI systems with quantifiable metrics...
IR35 Status:
Inside IR35

CV-Library London, UK Contractor
CL
May 23, 2026  
Data Scientist
Job Title: Data Scientist (Generative AI & LLMs) Location: London(Hybrid role) Employment Type: 12 months contract Role Overview We are seeking a versatile Data Scientist to lead the end-to-end development of AI solutions, with a heavy focus on Generative AI and Large Language Models (LLMs). You will bridge the gap between business requirements and technical execution, overseeing the entire lifecycle from initial scoping and data engineering to model deployment and prompt optimization. Key Responsibilities Business Alignment: Partner with stakeholders to define project scope, translate business problems into technical specs, and establish clear KPIs. Data Architecture: Design robust pipelines for data collection, cleaning, and preprocessing to ensure high-quality inputs for ML models. Model Development: Select and train appropriate architectures (BERT, GPT, etc.) using supervised, unsupervised, or reinforcement learning strategies. Prompt Engineering: Design, test, and...
IR35 Status:
Unknown Status

CV-Library London, UK Contractor
CL
May 22, 2026  
Senior Full Stack Engineer
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. Job Title: Senior Full Stack Engineer Location: London 4-5 days in office Contract: 12 months contract Rate: £100 per hours inside umbrella As a senior full stack engineer you will be instrumental in designing and developing web font-ends and back-end services for a new platform built to automate the management of the full lifecycle of complex private assets. Your expertise is expected to be pivotal in ensuring usability, scalability, performance and resilience of this high-profile platform. Job Responsibilities: * Collaborate closely with cross-functional team, including...
IR35 Status:
Unknown Status

CV-Library London, UK Contractor
CL
May 22, 2026  
Data Engineer (Spark/ Kubernetes) (Financial Services)
Your new company Working for a renowned financial services organisation Your new role We are seeking a Data Engineer to support the replacement of a legacy ETL tool with a modern Apache Spark based data platform. This is a hands‑on engineering role focused on building and supporting Spark jobs, with an emphasis on performance, reliability, and scalability. The role is focused on building nonperformance Apache Spark jobs, with a strong emphasis on performance optimisation. Working in containerised environments using Kubernetes is a key element also as well as experience across Python/ Scala and Java. The role sits within a small Agile delivery team of four engineers (two onshore and two in Shenzhen), working closely with a Senior Data Engineer. You will be responsible for development work, sprint delivery, demos, documentation, and stakeholder engagement. This position suits a mid to senior level engineer with strong Spark development experience rather than design,...
IR35 Status:
Unknown Status

CV-Library London, UK Contractor
CL
May 22, 2026  
Compute Lead
Job title: Compute Lead Contract: 3 months rolling Location: London (Hybrid) Inside IR35 Job description As the Compute & Cloud Leader, you will be responsible for the operation, stability, and optimisation of enterprise compute platforms, spanning Cloud (primarily Azure), Linux, AIX, Windows, VMware, and Red Hat environments. You will lead a team of outsourced specialists to ensure compute services are secure, resilient, and scalable, while driving automation and lifecycle management in line with industry best practices. This role requires strong technical leadership, operational discipline, and a focus on service reliability. Key Responsibilities * Lead day-to-day operations of enterprise compute platforms (Cloud (Azure), Linux, AIX, Windows, VMware, Red Hat). * Ensure compliance with patching, security, and configuration standards across all compute environments. * Manage lifecycle activities, including End-of-Life (EoX) planning, upgrades, and migrations. *...
IR35 Status:
Inside IR35

CV-Library London, UK Contractor
CL
May 20, 2026  
Cyber Security Engineer
Cyber Security Engineer – Outside IR35 Location: London / Hybrid Overview VIQU IT are looking for a Cyber Security Engineer who thrives on turning strategy into real-world protection. This is a hands-on role focused on strengthening and evolving the customer’s security landscape across identity, endpoints, and cloud platforms. You’ll play a key part in making sure security controls are not just designed—but fully implemented, optimised, and delivering measurable impact. Working closely with the Global VP of IT, you’ll take ownership of executing security initiatives at pace, ensuring risks are addressed effectively and controls are embedded into everyday operations. Cyber Security Engineer responsibilities: Implement and evolve Zero Trust controls across identity, endpoints, and cloud Design, deploy, and optimise MFA and Conditional Access policies, including privileged access Strengthen security posture using Microsoft Defender and industry best practices Lead remediation of...
IR35 Status:
Outside IR35

CV-Library London, UK Contractor
CL
May 20, 2026  
Cyber Solutions Architect
Cyber Solution Architect (Digital Platforms & Trading Systems) 8-Month contract - Inside IR35 - market rate London based - hybrid working - 3 days a week onsite Must have Base Metals trading experience Role Overview We are looking for a hands-on, highly technical Cyber Solution Architect to design and deliver secure solutions across our digital platform ecosystem, with a strong focus on Base Metals Order Execution Management Systems (OEMS). This role requires deep technical expertise, practical implementation capability, and the ability to embed security into complex, low-latency trading environments. Key Responsibilities Design and implement secure, scalable cyber solutions for digital platforms, including OEMS and associated trading infrastructure. Act as a hands-on architect, contributing directly to solution design, engineering decisions, and security implementation. Develop and maintain security architecture patterns, reference models, and solution blueprints. Lead...
IR35 Status:
Inside IR35

CV-Library London, UK Contractor
CL
May 17, 2026  
Senior Data Engineer
Job title: Senior Data Engineer Location: London - Hybrid 2/3 days on site Duration: 6-12 months initially This is for a Senior, Experienced Data Engineer role to support Strategic Platform build, as part of Integrated Financial Crime Programme This role will be producing design and support for POC build this year. Strong knowledge of data governance, metadata management, data quality, and data mesh concepts, with the ability to influence enterprise-wide adoption. Ability to communicate complex technical concepts clearly to senior leadership, influencing architectural and investment decisions. Deep expertise in cloud data architecture and distributed computing paradigms, with strong hands‑on background in AWS data platforms, including Glue, Lambda, S3, Redshift, Athena, and Databricks. Modern Data Stack: Understanding of data Lakehouse architectures (Delta Lake, Iceberg) & experience with containerization using Docker. Including architecture design, data modelling,...
IR35 Status:
Unknown Status

CV-Library London, UK Contractor
CL
May 17, 2026  
Mobile Android Engineer (Kotlin)
Mobile Android (Kotlin) Engineer - London, Hybrid **NO SPONSORSHIP - Must have the right to work full time in the UK** Daily Rate: £300 PAYE/ £350 via Umbrella per day Location: London- Hybrid 3 days/week Overview A major banking company are looking for a Mobile Android Engineer to work on mobile applications that are used by tens of millions of their cardholders around the world. They want someone with strong technical skills and creativity; someone who enjoys solving tough problems and working with innovative technologies. Responsibilities You will be to working on a team of designers, product owners, QA, and engineers developing and improving features. You should be familiar with modern software development methodologies popular in Android and be able to dive deep and rapidly iterate on ideas with your team despite some ambiguity. Skills Strong Kotlin proficiency Experience working on modern app architecture (MVVM, Jetpack Compose, distributed app structures, migrated...
IR35 Status:
Unknown Status

CV-Library London, UK Contractor
CL
Apr 03, 2026  
Software Engineer (C++)
C++ Engineer Certain Advantage are hiring for a C++ Engineer based in London. This role is on an initial contract till the end of the year and is hybrid. The company We’re working with an organisation that operates globally, helping power homes, transport, and industries with the energy they depend on every day. The role: Implement solutions using the provided exchange SDKs in different languages such as C++, Rust, Python, Typescript Write software that communicates with exchanges through their APIs, receiving market data and sending orders over the network in different protocols, such as FIX, Websocket or HTTP requests Optimize exchange communication through kernel bypass, optimizing TLS or the connection handling to an exchange Implement trading algorithms based on requirements provided by traders and quants Acquire and develop the necessary trading knowledge to successfully translate the requirements into actual software implementation Continuously improve the...
IR35 Status:
Unknown Status

CV-Library London, UK Contractor
CL
May 23, 2026  
FPGA Design Engineer
FPGA Design Engineer 12 month contract Based in Stevenage Offering 90ph Inside IR35 Do you have experience using VHDL? Do you have experience designing for Zilinx, Intel, or Microsemi FPGAs? Do you want to work with an industry-leading company? If your answer to these is yes, then this could be the role for you! As the FPGA Design Engineer, you will be working alongside a market-leading Defence and Aerospace company who are constantly growing and developing. They are always looking to bring on new talents such as yourself and further develop your skills to enable you to grow within the company and industry. Due to the nature of the work you will be involved in, you will be required to obtain UK SC clearance in this role. You will be involved in: Generating complex FPGA architectures and design implementations (VHDL, Simulink etc), targeting Xilinx, Intel, Microsemi devices Verifying complex FPGA implementations using VHDL and System Verilog\UVM test-bench methodologies...
IR35 Status:
Inside IR35

CV-Library Stevenage, Hertfordshire Contractor
  • Follow us on:
  • Facebook
  • Twitter
  • Instagram
  • LinkedIn
  • Home
  • Contact
  • About Us
  • Terms & Conditions
  • Employer
  • Post a Job
  • Search Resumes
  • Sign in
  • Job Seeker
  • Find Jobs
  • Outside IR35
  • Create Resume
  • Sign in
© 2008-2026 Powered by SmartJobBoard Job Board Software