20 of 20 Performance Optimisation Jobs in Hertfordshire

Senior Software Developer

Hiring Organisation
PostGrid
Location
Watford, Hertfordshire, UK
Employment Type
Full-time
customer base. Your Responsibilities: Architectural Design: Architect, develop, and maintain scalable REST APIs that can serve a multitude of use cases without compromising on performance or backwards compatibility. Performance Optimisation: Identify and unlock performance opportunities within existing Node.js services, leveraging Rust to build high-performance ...

Senior Software Developer

Hiring Organisation
PostGrid
Location
Hemel Hempstead, Hertfordshire, UK
Employment Type
Full-time
customer base. Your Responsibilities: Architectural Design: Architect, develop, and maintain scalable REST APIs that can serve a multitude of use cases without compromising on performance or backwards compatibility. Performance Optimisation: Identify and unlock performance opportunities within existing Node.js services, leveraging Rust to build high-performance ...

Senior Software Engineer (Trading Systems)

Hiring Organisation
Beamost Ltd
Location
Hemel Hempstead, Hertfordshire, UK
Employment Type
Full-time
established trading-related application and drive its ongoing development. You will manage and enhance the existing codebase, deliver new features, ensure reliability and performance, and help evolve the system as the business grows. This is an excellent opportunity for someone who enjoys autonomy, technical responsibility, and working … latency, high-performance applications. What You'll Do Maintain, extend, and optimise an existing Python-based trading application Add new features and improve current capabilities with a focus on performance, reliability and clean architecture Build and optimise real-time pipelines handling high-frequency data Improve latency, throughput ...

Senior Software Engineer (.Net)

Hiring Organisation
Primis
Location
Hemel Hempstead, Hertfordshire, UK
Employment Type
Full-time
they need exceptional .NET Software Engineers to drive this evolution. Your Impact: Design and develop mission-critical platform services, APIs, and merchant portals Drive performance optimisation and system reliability through intelligent engineering Champion engineering excellence in architecture, code quality, and delivery Partner with cross-functional teams to deliver ...

Software Engineer

Hiring Organisation
Digital Waffle
Location
Hemel Hempstead, Hertfordshire, UK
Employment Type
Full-time
Node.js, TypeScript, React, and modern cloud engineering Hands-on experience with AWS serverless, particularly Lambda, Step Functions, DynamoDB Solid understanding of scalable architecture and performance optimisation Experience in scale ups, startups, or SMEs where speed, ownership, and adaptability matter Strong debugging, problem solving, and delivery skills Interest ...

Senior Full Stack Engineer

Hiring Organisation
Levy Global
Location
Hemel Hempstead, Hertfordshire, UK
Employment Type
Full-time
Translating product and design requirements into scalable, high-quality solutions Collaborating closely with product managers, designers, and other engineers Tackling complex challenges around scalability, performance, and reliability Raising the bar on code quality, tooling, and engineering best practices What we're looking for 7+ years of experience … heavy UIs using React (Next.js and Chakra UI are a plus) Hands-on experience with relational (MySQL) and NoSQL databases Strong debugging, troubleshooting, and performance optimisation skills Take ownership and enjoy driving work forward Care about quality, performance, and continuous improvement Tech you'll work with Backend ...

Software Engineer - Logistics & Operations

Hiring Organisation
PostGrid
Location
Watford, Hertfordshire, UK
Employment Type
Full-time
distributed systems, job queues, and microservice architectures. Hands-on experience with both SQL and NoSQL databases (e.g., PostgreSQL, MongoDB). Strong debugging and performance optimisation skills. Ability to write clean, maintainable, and well-documented code. Preferred Qualifications: Experience working with logistics, shipping APIs, or supply chain systems. Familiarity ...

Software Engineer - Logistics & Operations

Hiring Organisation
PostGrid
Location
Hemel Hempstead, Hertfordshire, UK
Employment Type
Full-time
distributed systems, job queues, and microservice architectures. Hands-on experience with both SQL and NoSQL databases (e.g., PostgreSQL, MongoDB). Strong debugging and performance optimisation skills. Ability to write clean, maintainable, and well-documented code. Preferred Qualifications: Experience working with logistics, shipping APIs, or supply chain systems. Familiarity ...

Senior AI Engineer

Hiring Organisation
Circuit Medical
Location
Stevenage, Hertfordshire, UK
Employment Type
Full-time
approaches including working with agentic architecture. Key Responsibilities Backend Development & Architecture - Design and implement scalable Python backend services, architect and maintain secure, high-performance, production multi-tenant systems, and develop RESTful and asynchronous APIs for internal and external use. LLM, Agents & AI Integration - Drive R&D innovation to meet … preferably AWS) and infrastructure-as-code Ø Experience with containerisation, orchestration, and CI/CD pipelines Ø Understanding of database scaling, caching strategies, and performance optimisation Ø Familiarity with LLM technologies and latest utilisation methodologies, including agentic workflows Ø Strong understanding of software design principles and coding standards ...

Backend Engineer, Contract | Python (Django), Java and Rust | Fully Remote / EU-Based | Rate £550-650pd, Outside IR35 | 12-months Contract Length

Hiring Organisation
Owen Thomas | Pending B CorpTM
Location
Stevenage, Hertfordshire, UK
Employment Type
Full-time
Contract Length Designing and building robust backend services across Python and Django Collaborating with product and platform teams to scale critical infrastructure Contributing to performance optimisation, secure coding, and clean architecture decisions Bringing in best practices across multiple programming paradigms and languages Core Skills for the Backend Engineer ...

Backend Engineer, Contract | Python (Django), Java and Rust | Fully Remote / EU-Based | Rate £550-650pd, Outside IR35 | 12-months Contract Length

Hiring Organisation
Owen Thomas | Pending B CorpTM
Location
Hemel Hempstead, Hertfordshire, UK
Employment Type
Full-time
Contract Length Designing and building robust backend services across Python and Django Collaborating with product and platform teams to scale critical infrastructure Contributing to performance optimisation, secure coding, and clean architecture decisions Bringing in best practices across multiple programming paradigms and languages Core Skills for the Backend Engineer ...

Software Engineer

Hiring Organisation
Understanding Solutions
Location
Hemel Hempstead, Hertfordshire, UK
Employment Type
Full-time
platform, leading the development of the execution layer and market-making system. You'll step into a technical leadership role, driving architecture, improving performance, and ensuring the system is built to world-class standards. If you've built ultra-low-latency trading systems before and want to take full … systems Proven ability to lead the build of execution engines, market-making platforms, or similar low-latency trading infrastructure Strong background in system architecture, performance optimisation, and fault-tolerant distributed systems Experience replacing or migrating systems from languages such as Python into Rust Comfortable taking full ownership ...

NetSuite Developer

Hiring Organisation
IT Works Recruitment LTD
Location
Watford, Hertfordshire, UK
Employment Type
Full-time
closely with finance, operations, and IT teams to translate requirements into scalable customizations, integrations, and enhancements. This role focuses on SuiteScript development, system integrations, performance optimization, and ongoing platform support to ensure NetSuite runs efficiently, securely, and in line with best practices. ...

NVIDIA Isaac Sim (Simulation Engineer) - 54835

Hiring Organisation
Turing
Location
Stevenage, Hertfordshire, UK
Employment Type
Full-time
configure them for perception tasks (semantic labelling) and physics interaction (collision geometry, articulation). Environment Assembly: Build and validate simulation scenes, ensuring performance optimization (LODs, proxy meshes) and physics determinism. Pipeline & Logic: Use Python & OmniKit to write behaviour scripts and document the workflow for future scalability. Must-Have Qualifications ...

NVIDIA Isaac Sim (Simulation Engineer) - 54835

Hiring Organisation
Turing
Location
Watford, Hertfordshire, UK
Employment Type
Full-time
configure them for perception tasks (semantic labelling) and physics interaction (collision geometry, articulation). Environment Assembly: Build and validate simulation scenes, ensuring performance optimization (LODs, proxy meshes) and physics determinism. Pipeline & Logic: Use Python & OmniKit to write behaviour scripts and document the workflow for future scalability. Must-Have Qualifications ...

Azure DevOps Lead

Hiring Organisation
The Citation Group
Location
Stevenage, Hertfordshire, UK
Employment Type
Full-time
stakeholders, we'd like to hear from you. Key Responsibilities: Team Leadership & Development: Lead, mentor, and develop a team of DevOps Engineers, setting clear performance expectations, providing constructive feedback, and fostering professional growth and career development opportunities. Strategic Planning: Define and communicate the Azure DevOps strategy and roadmap, aligning … Monitoring, Logging & Observability: Architect and oversee monitoring and logging solutions using Azure Monitor, Application Insights, and ELK Stack; ensure real-time visibility into system performance and security across all environments. Security & Compliance Leadership: Collaborate with security and compliance teams to establish and enforce security best practices across cloud resources ...

Information Technology Engineer

Hiring Organisation
Experis UK
Location
Watford, Hertfordshire, UK
Employment Type
Full-time
Security – NAT, NAPT, port forwarding, VPNs (vendor-agnostic) Connectivity – Leased lines, LLU, MPLS, xDSL, failover and resilience Wi-Fi – 802.x standards, site surveys, analytics, performance optimisation Servers & Hardware – Physical and virtual servers, Windows & Linux, Active Directory, Group Policy Virtualisation – Hyper-V, VMware (desirable) Storage & Backup – On-prem ...

Information Technology Engineer

Hiring Organisation
Experis UK
Location
Bishop's Stortford, England, United Kingdom
Security – NAT, NAPT, port forwarding, VPNs (vendor-agnostic) Connectivity – Leased lines, LLU, MPLS, xDSL, failover and resilience Wi-Fi – 802.x standards, site surveys, analytics, performance optimisation Servers & Hardware – Physical and virtual servers, Windows & Linux, Active Directory, Group Policy Virtualisation – Hyper-V, VMware (desirable) Storage & Backup – On-prem ...

AWS Developer

Hiring Organisation
Empiric
Location
Stevenage, Hertfordshire, UK
Employment Type
Full-time
with full working rights. You'll work across a modern AWS ecosystem, contributing to new feature development, architecture decisions, automation, and performance optimisation. Tech Stack You'll Work With You'll be hands-on with a wide range of AWS services, including: Compute & Serverless: Lambda, EC2 Networking & Security … scalable APIs (REST & GraphQL) Integrate event-driven workflows via EventBridge, SNS, and SQS Implement cloud-native authentication and authorisation using Cognito & IAM Optimise performance, reliability, and cost efficiency Work closely with engineering, product, and DevOps functions Ensure best practices in monitoring, logging, and security What We're Looking ...

SIEM Engineer

Hiring Organisation
Sopra Steria
Location
Hemel Hempstead, Hertfordshire, England, United Kingdom
Employment Type
Full-Time
Salary
£65,000 - £80,000 per annum
retire, with version control and rollback. Automate workflows and configurations using CI/CD, SOAR, scripting and IaC tools (Terraform, Ansible). Ensure platform performance, stability and reliability, including capacity planning, high availability, disaster recovery and proactive monitoring. What you will bring: Hands-on experience with Elastic Security … Splunk ES, including detection engineering, indexing, parsing and performance tuning. Strong expertise in data pipeline engineering, log enrichment, data quality and large-scale ingestion architectures (ECS/CIM). Proven ability to design, test and optimise detection content, including MITRE ATT&CK-aligned rules and risk-based alerting ...