Want to be a part of building high-performance foreign exchange trading systems? Contribute to all aspects of application development including functional and technical specifications, design, development and production support. Key Duties & Responsibilities. Systems development on a mature, modern codebase written in C++ Test, evaluate and recommend technologies to improve overall solutions Constantly improving the development life cycle and code quality Communicate and collaborate with the research and trading teams to design and deliver innovative, high-quality solutions Provide day-to-day support for the applications Code reviews, mentoring juniors Project planning, delegation of tickets Requirements, Skills & Experience Must have 6+ years of relevant industry experience with modern C++ Must have 3+ year experience with SQL, or a comparable relational database Solid understanding of TCP/UDP standards and network protocols Experience with writing low latency single and concurrent threaded applications Understanding of the C++ development life cycle and tooling on RHEL Linux Exposure to the FIX protocol Exposure to test-driven development Working practices are relaxed, as is the office environment. They want to get the best out of you and give you an environment where you can do great work. It’s rare to find a role where the impact of what you do can have such an immediate impact and often has the potential to move markets. No sponsorship is given on this occasion. Contact Ciara Clarke for a confidential discussion on this role.

Harrington Starr are seeking a Lead Cloud Security/ DevSecOps Engineer who can sit across the platform engineering team in a fast moving technical environment. The role is working for an international trading business.

Security Engineer PAM/IAM/Controls/Financial Services Up to PS700 per day (Inside IR35) Enhance IAM / PAM as part of the Cyber Security Engineering function who are developing cyber defence capabilities to protect the business from cyber threats which seek to impact the confidentiality, integrity, and availability of the group. Responsibilities Contribute to domain strategies and architectures, leads on engineering and the associated artefacts across the areas of identity & access management, privileged access management and secrets management technology. Be responsible for the controls related to the domain area and ensure they remain effective. Manage and deliver changes to controls as necessary which are not part of project activity. Develop key indicators, analysis and artefacts to continually evidence and report control effectiveness and risk for the group. Critical issue support for any operational incident from operations or global security operations centre for related domain technologies. Experience Knowledge and experience in the engineering and operation of privileged access management (PAM) and/or identity and access management (IAM) technologies and the integration with relevant platforms. Security certifications, CISSP, OSCP, TOGAF, GIAC or other relevant qualifications. Experience and knowledge of technology in financial services and/or regulated environments and industry compliance schemes (for example SWIFT) preferred. Archie.odonovan@harringtonstarr.com

Application Support Developer Fintech / Application Development / Support Tools C++/Java/FIX/Unix/Windows/MongoDB/SQL (CONTRACT - 12 Month) The role: You will be hands on development within the support function developing tools to assist the support team focused on L2 & L3 support. Experience required Hands on development experience with C++/ Java / Python You must have support experience within financial services / Fintech specifically working on trading applications / OMS / EMS Experience resolving issues in the order and execution management systems (OEMS) Advantage Experience with FIX Protocol Familiarity in Unix / Linux / Windows environments This position requires you in office 4 days per week. Please only apply if you can commit to 4 days in office and WFH on a Friday. Archie.odonovan@harringtonstarr.com

C++ Developer Contract hire PS500 - PS700 per day inside IR35 London hybrid working Join one of the UK's leading data analytical Fintechs to Capital Markets. We are looking for an experienced C++ Engineer who has a "self-starter" attitude to join a steadily growing FinTech firm based in London. You will the full scope of assigned development projects, gathering requirements, designing the solution with the team whilst helping to drive this business forward. Requirements: Experience of working with large amounts of data Minimum 2 years of commercial experience developing using C++ in a Linux environment. Experience of converting market data from Python to C++ Knowledge of protocols like ITCH, EOBI, iMpact, Optiq, and GTP (Group Ticker Plant). Source Control & Continuous Integration Apply now by clicking the link or contact me via email for a faster response - Barry.Ansell@HarringtonStarr.com

C#/.Net Developer 3 days a week on-site (London) Up to PS400 per day (Inside IR35) We are working with a leading investment bank looking to make two hires into their software development team based in London requiring you in office 3 days a week and work remotely 2 days a week. Requirements C# & .Net development experience - 5 years Azure development experience Docker SQL / T-SQL Experience with GIT and Azure DevOps as part of CI/CD Financial services experience Advantage The business is looking for someone who is immediately available and already located in London A background within Market/Liquidity/Financial/Credit risk would be a big advantage. This is a fast moving process, so please do not hesitate to send over your CV to archie.odonovan@harringtonstarr.com I will only be considering profiles who confirm that they will accept PS400 per day (Inside IR35). Please only apply if you will accept this rate.

C#/.Net Developer 3 days a week on-site (London) Up to PS400 per day (Inside IR35) We are working with a leading investment bank looking to make two hires into their software development team based in London requiring you in office 3 days a week and work remotely 2 days a week. Requirements C# & .Net development experience - 5 years Azure development experience Docker SQL / T-SQL Experience with GIT and Azure DevOps as part of CI/CD Financial services experience Advantage The business is looking for someone who is immediately available and already located in London A background within Market/Liquidity/Financial/Credit risk would be a big advantage. This is a fast moving process, so please do not hesitate to send over your CV to archie.odonovan@harringtonstarr.com I will only be considering profiles who confirm that they will accept PS400 per day (Inside IR35). Please only apply if you will accept this rate.

A leading Broker is expanding its current high performance team in Belfast. You will work on their state of art ultra-low latency trading systems across asset classes (equities, commodities, currencies, fixed income). The role: Background in taking products from design right through to delivery Strong sense of writing quality maintainable code Commercial experience in C++11 / C++14 Experience with writing multi-threaded systems on Linux / Unix based platforms Background in performance troubleshooting and tuning of low latency applications Working with networking protocols TCP/IP, UDP, Web-sockets Experience with development tools that aid in debugging, locating memory errors, performance analysis, etc. Valgrind, Clang You need: 5+ years of hands-on Software Development experience in C++, STL, Boost, Linux. A good understanding of networking, multicasting, UDP. A passion for new technologies and ideas. FIX & OMS exposure (desired). Strong understanding of data-structures & algorithms. This is a rare opportunity to build high performance latency sensitive systems for a well recognised firm. We are looking for outside of the box thinkers, passionate technologists, and someone who would like to excel their long term career within financial markets. Contact Ciara Clarke for a confidential discussion on this role.