1 to 25 of 37 Permanent Java Engineer Jobs in Hertfordshire

Looking to play your part in a revolutionary movement with sustainable energy? Are you a Core Java expert with extensive experience using concurrency, low latency and multithreaded applications? FULLY REMOTE Senior Java Engineer - Tech for Good Salary: up to £120k Location: Fully Remote from anywhere in the … UK We have a fantastic new opportunity for all you Java Engineers looking to get stuck into a new challenge working on exciting projects solving real-world problems. They are also very big supporters of Diversity & Inclusion so welcome all candidates. A unique energy software platform helping consumers transition … towards a sustainable future are looking for enthusiastic and knowledgeable Senior Java Engineers with a strong comprehension of the Core Java principles, including Multithreading, Concurrency and Low Latency to join their growing team. In this fantastic Senior Java Engineer role: You will have ownership over your More ❯

Looking to play your part in a revolutionary movement with sustainable energy? Are you a Core Java expert with extensive experience using concurrency, low latency and multithreaded applications? FULLY REMOTE Senior Java Engineer - Tech for Good Salary: up to £120k Location: Fully Remote from anywhere in the … UK We have a fantastic new opportunity for all you Java Engineers looking to get stuck into a new challenge working on exciting projects solving real-world problems. They are also very big supporters of Diversity & Inclusion so welcome all candidates. A unique energy software platform helping consumers transition … towards a sustainable future are looking for enthusiastic and knowledgeable Senior Java Engineers with a strong comprehension of the Core Java principles, including Multithreading, Concurrency and Low Latency to join their growing team. In this fantastic Senior Java Engineer role: You will have ownership over your More ❯

Looking to play your part in a revolutionary movement with sustainable energy? Are you a Core Java expert with extensive experience using concurrency, low latency and multithreaded applications? FULLY REMOTE Senior Java Engineer - Tech for Good Salary: up to £120k Location: Fully Remote from anywhere in the … UK We have a fantastic new opportunity for all you Java Engineers looking to get stuck into a new challenge working on exciting projects solving real-world problems. They are also very big supporters of Diversity & Inclusion so welcome all candidates. A unique energy software platform helping consumers transition … towards a sustainable future are looking for enthusiastic and knowledgeable Senior Java Engineers with a strong comprehension of the Core Java principles, including Multithreading, Concurrency and Low Latency to join their growing team. In this fantastic Senior Java Engineer role: You will have ownership over your More ❯

to work for a GreenTech company in zero tech debt that is committed to being the industry's top platform for a sustainable future? Java Software Engineer - GreenTech Start up! £60-90K + benefits Fully remote from anywhere in the UK We are partnered with an ‘energy … as-a-service’ platform, that was created to help both customers and suppliers advance the energy revolution. They are urgently looking for Java Software Engineers to join their rapidly growing team. Innovation is highly important to this company; they are looking for Java Software Engineers who wish to … As a technology company, they only complete GREENFIELD work, building and developing all frameworks, databases and tools from scratch. Tech stack required as a Java Software Engineer: · Core Java · C · Experience with APIs · Microservices · Multithreading, concurrency & high throughput · AWS · Kubernetes Benefits you will enjoy as a Java More ❯

to work for a GreenTech company in zero tech debt that is committed to being the industry's top platform for a sustainable future? Java Software Engineer - GreenTech Start up! £60-90K + benefits Fully remote from anywhere in the UK We are partnered with an ‘energy … as-a-service’ platform, that was created to help both customers and suppliers advance the energy revolution. They are urgently looking for Java Software Engineers to join their rapidly growing team. Innovation is highly important to this company; they are looking for Java Software Engineers who wish to … As a technology company, they only complete GREENFIELD work, building and developing all frameworks, databases and tools from scratch. Tech stack required as a Java Software Engineer: · Core Java · C · Experience with APIs · Microservices · Multithreading, concurrency & high throughput · AWS · Kubernetes Benefits you will enjoy as a Java More ❯

to work for a GreenTech company in zero tech debt that is committed to being the industry's top platform for a sustainable future? Java Software Engineer - GreenTech Start up! £60-90K + benefits Fully remote from anywhere in the UK We are partnered with an ‘energy … as-a-service’ platform, that was created to help both customers and suppliers advance the energy revolution. They are urgently looking for Java Software Engineers to join their rapidly growing team. Innovation is highly important to this company; they are looking for Java Software Engineers who wish to … As a technology company, they only complete GREENFIELD work, building and developing all frameworks, databases and tools from scratch. Tech stack required as a Java Software Engineer: · Core Java · C · Experience with APIs · Microservices · Multithreading, concurrency & high throughput · AWS · Kubernetes Benefits you will enjoy as a Java More ❯

Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate £550-650pd, Outside IR35 | 12-months Contract Length Opportunity: We're supporting a fast-moving client at huge global scale, that is in need of a Senior Backend Contractor with deep experience across … Java and Ruby . This is a high-impact freelance role within a tech-driven established team - building scalable systems in a modern backend environment. What You'll Be Doing as a Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate … pd | Outside IR35 : Designing and building robust backend services across Java, Python, and Rust-based systems 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 Ideally, supporting legacy More ❯

Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate £550-650pd, Outside IR35 | 12-months Contract Length Opportunity: We're supporting a fast-moving client at huge global scale, that is in need of a Senior Backend Contractor with deep experience across … Java and Ruby . This is a high-impact freelance role within a tech-driven established team - building scalable systems in a modern backend environment. What You'll Be Doing as a Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate … pd | Outside IR35 : Designing and building robust backend services across Java, Python, and Rust-based systems 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 Ideally, supporting legacy More ❯

Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate £550-650pd, Outside IR35 | 12-months Contract Length Opportunity: We're supporting a fast-moving client at huge global scale, that is in need of a Senior Backend Contractor with deep experience across … Java and Ruby . This is a high-impact freelance role within a tech-driven established team - building scalable systems in a modern backend environment. What You'll Be Doing as a Senior Backend Engineer Contractor (Java/Ruby focused) | Fully Remote/EU-Based | Rate … pd | Outside IR35 : Designing and building robust backend services across Java, Python, and Rust-based systems 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 Ideally, supporting legacy More ❯

About the role We have an exciting opportunity for a Java Engineer to join the elementsuite team, with a passion for clean code, elegant architecture, and efficient delivery. This is a hands-on role where you'll be developing the elementsuite platform and its foundational services - all mission … critical components that underpin our software stack. You'll be working with Java (and Rust where needed), developing robust, secure, and scalable applications. As part of a small, elite team, you'll have the freedom and responsibility to shape our platform's future. elementsuite is rewriting the rulebook on … solution is designed to power exceptional employee experiences and help our customers thrive. Key responsibilities in the role will include: Delivering best-in-class Java platform code, developing software in an iterative cycle with a focus on architecture and design throughout the process. Creating robust, scalable applications, using industry More ❯

Senior Software Engineer – Java - FinTech Remote First | London (UK) | Up to £120k + Benefits Are you a Java developer who thrives in a collaborative, test-driven environment? Do you believe in pair programming, continuous integration, and clean, maintainable code? If so, we’d love to hear from … you. Our FinTech client could be the ideal role for you.... Skills: Commercial Java experience - ideally in a fintech, performance environment Strength with Core Java Strong understanding of TDD Clear communication and teamwork Extreme Programming (XP) principles, with a strong focus on TDD, BDD, and DDD. Pair programming … is key. We value growth and flexibility, welcoming developers from all backgrounds. What You’ll Be Doing Building resilient and adaptable fintech platforms in Java Refactoring to improve code design Writing comprehensive tests for every commit Automating processes to improve efficiency Rotating across teams to enhance collaboration More ❯

Senior Software Engineer – Java - FinTech Remote First | London (UK) | Up to £120k + Benefits Are you a Java developer who thrives in a collaborative, test-driven environment? Do you believe in pair programming, continuous integration, and clean, maintainable code? If so, we’d love to hear from … you. Our FinTech client could be the ideal role for you.... Skills: Commercial Java experience - ideally in a fintech, performance environment Strength with Core Java Strong understanding of TDD Clear communication and teamwork Extreme Programming (XP) principles, with a strong focus on TDD, BDD, and DDD. Pair programming … is key. We value growth and flexibility, welcoming developers from all backgrounds. What You’ll Be Doing Building resilient and adaptable fintech platforms in Java Refactoring to improve code design Writing comprehensive tests for every commit Automating processes to improve efficiency Rotating across teams to enhance collaboration More ❯

Senior Software Engineer – Java - FinTech Remote First | London (UK) | Up to £120k + Benefits Are you a Java developer who thrives in a collaborative, test-driven environment? Do you believe in pair programming, continuous integration, and clean, maintainable code? If so, we’d love to hear from … you. Our FinTech client could be the ideal role for you.... Skills: Commercial Java experience - ideally in a fintech, performance environment Strength with Core Java Strong understanding of TDD Clear communication and teamwork Extreme Programming (XP) principles, with a strong focus on TDD, BDD, and DDD. Pair programming … is key. We value growth and flexibility, welcoming developers from all backgrounds. What You’ll Be Doing Building resilient and adaptable fintech platforms in Java Refactoring to improve code design Writing comprehensive tests for every commit Automating processes to improve efficiency Rotating across teams to enhance collaboration More ❯

Java Software Engineer (Must hold active SC) Location: Remote The Company: At Amber Labs, we are a cutting-edge UK and European technology consultancy that prioritises empowering autonomy, promoting experimentation, and facilitating rapid learning to provide exceptional value to our clients. Our company culture is centred around collaboration … support for the transition of applications into live service and support. Your skills and experience Experience with some of the following would be desirable: Java (Spring Boot), software design patterns, DDD, CQRS, Event Sourcing Postgres, Liquibase for database versioning Containerisation with Docker CI/CD pipelines (Jenkins, Gradle) API More ❯

Java Software Engineer (Must hold active SC) Location: Remote The Company: At Amber Labs, we are a cutting-edge UK and European technology consultancy that prioritises empowering autonomy, promoting experimentation, and facilitating rapid learning to provide exceptional value to our clients. Our company culture is centred around collaboration … support for the transition of applications into live service and support. Your skills and experience Experience with some of the following would be desirable: Java (Spring Boot), software design patterns, DDD, CQRS, Event Sourcing Postgres, Liquibase for database versioning Containerisation with Docker CI/CD pipelines (Jenkins, Gradle) API More ❯

Java Software Engineer (Must hold active SC) Location: Remote The Company: At Amber Labs, we are a cutting-edge UK and European technology consultancy that prioritises empowering autonomy, promoting experimentation, and facilitating rapid learning to provide exceptional value to our clients. Our company culture is centred around collaboration … support for the transition of applications into live service and support. Your skills and experience Experience with some of the following would be desirable: Java (Spring Boot), software design patterns, DDD, CQRS, Event Sourcing Postgres, Liquibase for database versioning Containerisation with Docker CI/CD pipelines (Jenkins, Gradle) API More ❯

Senior Java Developer - £75k | FinTech | remote | Java, React, AWS, TypeScript G.Digital have exclusively partnered with a growing FinTech who are looking for a Senior Java Engineer. 🔧 What You’ll Do: Design, develop, and maintain high-performance Java applications Collaborate with cross-functional teams to define, design … of applications Mentor junior developers and provide technical leadership Advocate for clean, scalable, and maintainable code ✅ What you will need: 5+ years of professional Java development experience Experience working with TypeScript to help with frontend bottlenecks Strong understanding of Spring/Spring Boot, REST APIs, and microservices architecture Solid … plus Excellent problem-solving skills and a team-first mindset 💡 Bonus Points For: Experience with Python 🚀 Package up to £75k remote working bonus Senior Java Developer - £75k | FinTech | remote | Java, React, AWS, TypeScript More ❯

Senior Java Developer - £75k | FinTech | remote | Java, React, AWS, TypeScript G.Digital have exclusively partnered with a growing FinTech who are looking for a Senior Java Engineer. 🔧 What You’ll Do: Design, develop, and maintain high-performance Java applications Collaborate with cross-functional teams to define, design … of applications Mentor junior developers and provide technical leadership Advocate for clean, scalable, and maintainable code ✅ What you will need: 5+ years of professional Java development experience Experience working with TypeScript to help with frontend bottlenecks Strong understanding of Spring/Spring Boot, REST APIs, and microservices architecture Solid … plus Excellent problem-solving skills and a team-first mindset 💡 Bonus Points For: Experience with Python 🚀 Package up to £75k remote working bonus Senior Java Developer - £75k | FinTech | remote | Java, React, AWS, TypeScript More ❯

Senior Java Developer - £75k | FinTech | remote | Java, React, AWS, TypeScript G.Digital have exclusively partnered with a growing FinTech who are looking for a Senior Java Engineer. 🔧 What You’ll Do: Design, develop, and maintain high-performance Java applications Collaborate with cross-functional teams to define, design … of applications Mentor junior developers and provide technical leadership Advocate for clean, scalable, and maintainable code ✅ What you will need: 5+ years of professional Java development experience Experience working with TypeScript to help with frontend bottlenecks Strong understanding of Spring/Spring Boot, REST APIs, and microservices architecture Solid … plus Excellent problem-solving skills and a team-first mindset 💡 Bonus Points For: Experience with Python 🚀 Package up to £75k remote working bonus Senior Java Developer - £75k | FinTech | remote | Java, React, AWS, TypeScript More ❯

Senior Java Developer 📍 UK-based | Remote-first with occasional London/northern meetups 🕒 Full-time | Salary: £70,000 – £90,000 What you’ll be doing Develop and maintain Java-based systems across multiple businesses Gradually modernise legacy code, introducing cleaner architecture and better development practices Work closely with … strategy and play a key role in shaping our future stack Support a secure and compliant development environment What we’re looking for Solid Java development experience Comfortable working with and improving legacy codebases Familiarity with AWS and cloud-based systems Good communication skills and collaborative mindset Experience in More ❯

Senior Java Developer 📍 UK-based | Remote-first with occasional London/northern meetups 🕒 Full-time | Salary: £70,000 – £90,000 What you’ll be doing Develop and maintain Java-based systems across multiple businesses Gradually modernise legacy code, introducing cleaner architecture and better development practices Work closely with … strategy and play a key role in shaping our future stack Support a secure and compliant development environment What we’re looking for Solid Java development experience Comfortable working with and improving legacy codebases Familiarity with AWS and cloud-based systems Good communication skills and collaborative mindset Experience in More ❯

Senior Java Developer 📍 UK-based | Remote-first with occasional London/northern meetups 🕒 Full-time | Salary: £70,000 – £90,000 What you’ll be doing Develop and maintain Java-based systems across multiple businesses Gradually modernise legacy code, introducing cleaner architecture and better development practices Work closely with … strategy and play a key role in shaping our future stack Support a secure and compliant development environment What we’re looking for Solid Java development experience Comfortable working with and improving legacy codebases Familiarity with AWS and cloud-based systems Good communication skills and collaborative mindset Experience in More ❯

We are looking for a Principal Vulnerability Engineer who will be part of the security vulnerability team for the Java platform. This team conducts both the red team (offensive) and blue team (defensive) duties. Responsibilities will include proactive research, security tooling, assessments, and assisting development teams with security … code review. Qualified candidate must have at least 10+ years of hands-on experience in platform security, deep knowledge of Java security model is a must. Minimum 10+ years of hands-on experience with security protocols and best practices are required. Ideal candidate is expected to work independently on … Proven past experience in successful security incident resolution and proactive research utilizing industry standard tools is a must-have. Past research and CVEs on Java security issues are a plus. Must have proficiency in Java, and expert level C/C++ skills, and systems level programming. Great personal More ❯

We are looking for a Principal Vulnerability Engineer who will be part of the security vulnerability team for the Java platform. This team conducts both the red team (offensive) and blue team (defensive) duties. Responsibilities will include proactive research, security tooling, assessments, and assisting development teams with security … code review. Qualified candidate must have at least 10+ years of hands-on experience in platform security, deep knowledge of Java security model is a must. Minimum 10+ years of hands-on experience with security protocols and best practices are required. Ideal candidate is expected to work independently on … Proven past experience in successful security incident resolution and proactive research utilizing industry standard tools is a must-have. Past research and CVEs on Java security issues are a plus. Must have proficiency in Java, and expert level C/C++ skills, and systems level programming. Great personal More ❯

We are looking for a Principal Vulnerability Engineer who will be part of the security vulnerability team for the Java platform. This team conducts both the red team (offensive) and blue team (defensive) duties. Responsibilities will include proactive research, security tooling, assessments, and assisting development teams with security … code review. Qualified candidate must have at least 10+ years of hands-on experience in platform security, deep knowledge of Java security model is a must. Minimum 10+ years of hands-on experience with security protocols and best practices are required. Ideal candidate is expected to work independently on … Proven past experience in successful security incident resolution and proactive research utilizing industry standard tools is a must-have. Past research and CVEs on Java security issues are a plus. Must have proficiency in Java, and expert level C/C++ skills, and systems level programming. Great personal More ❯