Senior software developer jobs in Letchworth Garden CityCreate job alerts

Senior Software Engineer – Simulation Software Location: Hertfordshire Clearance: British citizenship required due to security restrictions Salary: Circa £64,000 depending on experience Our client is looking for a Senior Software Engineer to join a growing software development team focused on improving the reliability, performance, and maintainability of complex simulation systems. This is a hands-on software engineering role where you will work within an Agile software development environment, helping to resolve technical issues, reduce technical debt, and improve overall software quality across critical systems. Key Responsibilities • Investigate and resolve complex software issues, • Improve software reliability and system performance, • Reduce technical debt through long-term software engineering solutions, • Support CI/CD pipelines and automated testing, • Work closely with software development teams in an Agile environment, • Build strong understanding of system architecture and software behaviour Skills & Experience • Previous experience as a Software Engineer or Software Developer, • Strong software development background using C++, Java, Rust, or similar, • Experience working in Agile software engineering teams, • Knowledge of CI/CD and automated testing, • Experience with debugging, root-cause analysis, and performance optimisation, • Willingness to learn Ada programming Benefits • Annual bonus, • Enhanced pension, • Paid overtime, • Flexible leave allowance, • Healthcare plan, • Excellent onsite facilities and flexible working options

Provide support and guidance to Software Developers. You are an experienced and proactive software developer with a strong technical background and a passion for delivering high-quality solutions. Reporting to the Software Development Team Lead, the role will focus on developing and maintaining besp

A leading tech company specialising in data management have an immediate requirement for an experienced C/Linux Software Developer for an initial 6 month contract Key Skills: Software Developer, Software Engineer, C, Linux, Autotools, LDAP, Active Directory, Terraform, OpenTofu, API Location: Hybrid

Are you a Senior C++ Software Developer? Are you passionate about mentoring fellow developers? If yes, then read on, and let us tell you why Synertec is adding real value into the Public and Commercial Sectors. Now let us tell you a little more about us: Synertec strives to be the supplier of choice

Senior Software Developer / Software Engineer (C#. Are you an experienced C#, backend focussed Software Developer?. You could be progressing your career in a senior, hands‑on role at a global Sports Trading business, earning substantial bonuses.

ITRS Group is looking for a Senior Java Engineer in London.

Cisco Systems is looking for a Senior Software Engineer to join the Isovalent team. This role is at the forefront of enhancing developer experience within Kubernetes environments.

We are looking for a Senior Software Developer who shares our passion for. Product-Led Mindset: Ability to function as a hybrid between a Product Owner and Developer, identifying problems independently and building foundations.

We're looking for a Senior Developer/engineer who's genuinely ready for a senior role — someone who can own the full software lifecycle, shape technical direction, and raise the bar for the team around them. At tombola, senior developers have genuine influence. The best senior developers here do b

At Point of Rental Software, we revolutionize the rental industry by providing cutting-edge, comprehensive software solutions tailored to our customers' needs. Our software suite streamlines operations, enhances customer experiences, and maximizes profitability for global rental businesses of all si

Comfortable operating at senior / VP level in a delivery-focused team. Collaborate with other senior engineers to drive platform quality and stability. A global financial services organisation is growing a senior Java engineering team to support a strategic, business-critical technology platform.

NET Software Developer with FX and Fixed Income. NET Software Developer with at least 3 to 5 years proven track record of developing with C#. Ability to produce clean, well‑written, fully tested production ready software.

As a Senior Software Engineer (Backend), you will play a key role in designing and building scalable, cloud-based services using Java and Spring Boot. As a senior engineer you will contribute to architectural decisions, mentor other engineers, and help drive continuous improvement across the team. P

Senior Software Developer / Software Engineer (C#. Are you an experienced C#, backend focussed Software Developer?. You could be progressing your career in a senior, hands‑on role at a global Sports Trading business, earning substantial bonuses.

We are currently recruiting a Senior Software Developer who specializes in Java and C#. Qualifications: 5 to 7 years of experience in developing software with Java and C#.

A leading UK infrastructure and utilities organisation is looking to hire a Senior Systems Developer to join their growing technology team. Role: Senior Systems Developer (Python / PostgreSQL). This is a fantastic opportunity to play a key role in designing and delivering modern software solutions w

We are looking for a senior Java or C++ developer to join our Software Development team based in Surbiton to work on our flagship RokDoc desktop application. Award‑winning RokDoc® geopredictive software, Curate knowledge management software, QI Solutions, GeoPressure and GeoMechanics Consultancy,

Avantra is looking for an energetic, self motivated, autonomous Senior Software Developer. You will be a part of a great team alongside other senior developers working in an agile environment. You will be working with a team that is responsible for the full software development cycle including devel

Hybrid work (2 to 3 days per week onsite work).Thorough understanding of React.Vast experience in building web-based client-server applications.In-depth knowledge of JavaScript, Node.Hands-on experience with Web SDK.Exposure to GitLab and JIRA is essential.

Senior Software Developer, Realtime. As a Senior Realtime Software Developer, you will take on a leadership role within the Realtime Technologies team. Beyond writing code, you will focus on architecting sustainable solutions and mentoring other developers within the team.

Are you a Senior Software Developer with strong C#,. Due to continued growth and platform development, they are looking to strengthen their team with a capable Senior Developer who can support, enhance and modernise their existing systems while contributing to future improvements. This role would su

Senior Calypso Software Developer - London.

Senior Software Engineer (Python/Java, AWS). From a technical standpoint, the team is looking for experienced software engineers with strong skills in either Python or Java alongside AWS, with the ability to work across a modern cloud environment.

As a Senior Software Developer, your activities will be a balance of software development and team management. Your energy and enthusiasm will be vital in maintaining momentum, ensuring your team is continuously delivering outstanding technology to artists and TDs, and partnering with the Software D

We support thousands of associations, clubs, and communities globally with software that simplifies recurring billing, member engagement, and day-to-day operations. Proactively identify technical debt, architectural improvements, and tooling enhancements that improve developer velocity and product q

We are building a new software engineering team with strong applied AI orientation to amplify WorldQuant's success. Work experience as a software engineer with strong programming skills, preferably in Python.

Headquartered in San Francisco, our investors include.Develop and maintain complex, production-grade.Design modular, testable codebases using modern.Collaborate asynchronously with AI research teams to improve model training and evaluation.Work independently to meet deadlines and enhance.Experience

Senior Full-Stack Software Developer (React/PHP). A Software Developer is a technical role within our organisation. Comfortable demonstrating solutions to senior stakeholders.

Greater London is seeking a talented individual contributor with a strong engineering background to lead complex, vaguely defined projects and mentor junior engineers.The ideal candidate will have over 8 years of experience, with skills in technical design and operational excellence.This role includ

Knowledge of cloud software design, particularly AWS.

A leading software company in Greater London is seeking a senior Java or C++ developer to join their Software Development team in Surbiton. The role requires at least 5 years of software development experience and a relevant degree.

Senior Developer – Global Payment Gateway System. The role is ideal for a senior backend developer who enjoys working on complex distributed systems, modern Java platforms, and cloud-native architectures, and who takes ownership of systems that must perform reliably under real-world load. Senior D

We are looking for a senior Java or C++ developer to join our Software Development team based in Surbiton to work on our flagship RokDoc desktop application. Award winning RokDoc® geopredictive software, Curate knowledge management software, QI Solutions, GeoPressure and GeoMechanics Consultancy, a

At think‑cell, we are continuously improving how professionals create business presentations by introducing smarter automation and assistance features into our product.In this role, you will help turn new ideas and early AI‑driven concepts into reliable features used by more than 1.You will buil

We're seeking Senior Python Developers to join our back-end development team. An in-person meeting with our senior leadership team and co-founders at our office.

Senior Software Developer (VP) – (Corporate Investment Banking industry). If you’re a mid-to-senior developer with a banking background looking to step deeper into the front office and Commodities space, this is a standout opportunity. Are you a hands-on developer with strong.

Solid grasp of systems architecture and software engineering fundamentals. You enjoy building, packaging, and configuring complex software systems. You are fluent across modern software development and ML tooling and like collaborating with engineers, researchers, and artists.

In this role as a Market Making Senior Software Developer, you will work closely with both business stakeholders and engineering teams to identify, design, and deliver products that strengthen our market making capabilities and improve operational efficiency across the business. Senior Software Deve

Significant professional experience as a software developer, with demonstrable depth in at least one of the following areas:. Our belief is that great developers can pick up new tools — especially in an environment where AI‑assisted development is making cross‑discipline work more accessible t

Senior Software Engineer - Developer Experience – Isovalent. Cisco Isovalent is seeking an accomplished Senior Software Engineer with expertise in architecture and delivery, CI, operations and most importantly AI assistance. Cisco Isovalent builds open‑source software and enterprise solutions so

Digis is a European company of 200 employees.The company was founded 9 years ago and has managed to grow from a startup into a reliable partner for our clients.We took the best from the product and outsourcing company.You collaborate directly with the client's team, make business trips.Digis isaEuro

We are looking for a key individual to design and deliver high quality software systems for our fast growing client. You will be the technical lead for software development and delivery. Write high quality software to meet internal and external needs.

To be successful as a Senior Software Developer, you should have experience with:. Embark on a transformative journey as a Senior Software Developer. At Barclays, our vision is clear – To design, develop and improve software, utilising various engineering methodologies, that provides business, pla

The Senior Developer Relations Engineer is part of the Developer Experience team. Developer Relations, Developer Advocacy, Solutions Engineering, or similar). If you are passionate about the bleeding edge of Developer Platforms and AI tooling and love helping other developers succeed, you’ve found

Our recruitment firm represents a client currently seeking an accomplished Senior Software Developer to join their dynamic team. This role is an excellent opportunity to utilise your extensive skills to produce scalable software solutions, contributing across the entire software development life cyc

Senior Lead C# Software Developer. We urgently require a Senior C# Lead Developer with at least 5 to 10 years solid expertise in developing financial systems ideally banking systems.

Our team consists of frontend and backend developers, data analysts and data scientists, architects, analysts and project managers.