Application Engineer

Janus Henderson Group; Greater London; Hybrid; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Annual bonus

Health and wellbeing benefits

Hybrid working

Job summary

Janus Henderson Group is seeking an experienced software engineer to turn emerging technologies into practical, high-quality capabilities. You will design, build, test, and improve prototypes and platform components to support engineering goals.

You will use AI-assisted tools responsibly within a structured workflow, analyze complex problems, and own outcomes from problem to delivery while collaborating across teams and platforms.

Qualifications

• Proven software-engineering experience in one or more modern languages and development ecosystems.
• Experience using AI-assisted development tools as part of a structured engineering workflow.
• Analytical mindset with ability to break down complex problems and test hypotheses.
• Self-starting with the judgment to progress independently while knowing when to collaborate, challenge or escalate.
• Strong understanding of software quality, source control, automated testing, secure development and delivery practices.
• Clear written and verbal communication and concise technical documentation.

Responsibilities

• Turn emerging technologies and ideas into practical, high-quality capabilities through applied innovation, rapid prototyping and shared engineering platforms.
• Design, build, test and improve prototypes, reference implementations, reusable components, automation and platform capabilities that support wider engineering goals.
• Use AI-assisted tools responsibly across analysis, design, coding, testing, documentation and delivery, maintaining human review and accountability.
• Analyse business and engineering problems, test assumptions and learn new technologies quickly, adapting recommendations as evidence changes.
• Take ownership from initial problem to demonstrable outcome, escalating blockers early and keeping stakeholders informed.
• Balance delivery pace with security, testing, maintainability, documentation and agreed processes, avoiding unnecessary risk and technical debt.
• Help operate and improve shared platforms, including Azure API Management, BlackRock Aladdin APIs and event platforms.
• Identify and reduce friction in development, testing, deployment, observability and support processes.
• Collaborate openly, review work, share learning and help other engineering teams adopt successful patterns and reusable assets.
• Carry out other duties as assigned

Skills

Software engineering

AI-assisted tools

Analytical mindset

Self-starter

Software quality

Communication

Learning mindset

Tools

Azure API Management

CI/CD

Infrastructure as code

Observability

Job description

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A career at Janus Henderson is more than a job, it’s about investing in a brighter future together.

Our Mission at Janus Henderson is to help clients define and achieve superior financial outcomes through differentiated insights, disciplined investments, and world-class service. We will do this by protecting and growing our core business, amplifying our strengths and diversifying where we have the right.

Our Values are key to driving our success, and are at the heart of everything we do:

Clients Come First - Always | Execution Supersedes Intention | Together We Win | Diversity Improves Results | Truth Builds Trust

If our mission, values, and purpose align with your own, we would love to hear from you!

Your opportunity

• Turn emerging technologies and ideas into practical, high-quality capabilities through applied innovation, rapid prototyping and shared engineering platforms.
• Design, build, test and improve prototypes, reference implementations, reusable components, automation and platform capabilities that support wider engineering goals.
• Use AI-assisted tools responsibly across analysis, design, coding, testing, documentation and delivery, maintaining human review and accountability.
• Analyse business and engineering problems, test assumptions and learn new technologies quickly, adapting recommendations as evidence changes.
• Take ownership from initial problem to demonstrable outcome, escalating blockers early and keeping stakeholders informed.
• Balance delivery pace with security, testing, maintainability, documentation and agreed processes, avoiding unnecessary risk and technical debt.
• Help operate and improve shared platforms, including Azure API Management, BlackRock Aladdin APIs and event platforms.
• Identify and reduce friction in development, testing, deployment, observability and support processes.
• Collaborate openly, review work, share learning and help other engineering teams adopt successful patterns and reusable assets.
• Carry out other duties as assigned

What to expect when you join our firm

• Hybrid working and reasonable accommodations
• Excellent Health and Wellbeing benefits including corporate membership to Wellhub
• Paid volunteer time to step away from your desk and into the community
• Support to grow through professional development courses, tuition/qualification reimbursement and more
• Maternal/paternal leave benefits and family services
• All employee events including networking opportunities and social activities
• Lunch allowance for use within our subsidized onsite canteen

Must have skills

• Practical software-engineering experience in one or more modern languages and development ecosystems, with evidence of producing tested, maintainable software.
• Experience using AI-assisted development tools as part of a structured engineering workflow, rather than solely for ad-hoc code generation.
• An analytical mindset: able to break down complex problems, assess options, test hypotheses and draw evidence-based conclusions.
• A self-starting approach, with the judgement to progress independently while knowing when to collaborate, challenge or escalator.
• Strong understanding of software quality, source control, automated testing, secure development and delivery practices.
• Ability to connect detailed technical work to broader outcomes and contribute constructively to shared team goals.
• Clear written and verbal communication, including concise technical documentation and explanation of decisions and trade-offs.
• A genuine appetite for learning and a passion for improving engineering processes, developer experience and delivery effectiveness.

Nice to have skills

• Experience with cloud-native development, APIs, integration platforms or developer tooling; Microsoft Azure and Azure API Management experience is particularly relevant.
• Experience creating proofs of concept, technical spikes or reusable engineering patterns in an enterprise environment.
• Exposure to the BlackRock Aladdin platform, investment management or another highly controlled industry.
• Experience with CI/CD, infrastructure as code, observability, automated quality controls or evaluation of AI-generated outputs.

Supervisory responsibilities

• No

Potential for growth

• Regular training
• Continuing education courses

You will be expected to understand the regulatory obligations of the firm, and abid e by the regulated entity requirements and JHI policies applicable for your role.

At Janus Henderson Investors we’re committed to an inclusive and supportive environment. We believe diversity improves results and we welcome applications from candidates from all backgrounds. Don’t worry if you don’t think you tick every box, we still want to hear from you! We understand everyone has different commitments and while we can’t accommodate every flexible working request we’re happy to be asked about work flexibility and our hybrid working environment. If you need any reasonable accommodations during our recruitment process, please get in touch and let us know at [e-mail]

Annual Bonus Opportunity:Position may be eligible to receive an annual discretionary bonus award from the profit pool. The profit pool is funded based on Company profits. Individual bonuses are determined based on Company, department, team and individual performance.

Benefits: Janus Henderson is committed to offering a comprehensive total rewards package to eligible employees that includes; competitive compensation, pension/retirement plans, and various health, wellbeing and lifestyle benefits. To learn more about our offerings please visit the Why Join Us section on the career page here .

Janus Henderson Investors is an equal opportunity employer.All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability or veteran status. All applications are subject to background checks.

Janus Henderson (including its subsidiaries) will not maintain existing or sponsor new industry registrations or licenses where not supported by an employee’s job functions (as determined by Janus Henderson at its sole discretion).

You should be willing to adhere to the provisions of our Investment Advisory Code of Ethics related to personal securities activities and other disclosure and certification requirements, including past political contributions and political activities. Applicants’ past political contributions or activity may impact applicants’ eligibility for this position.

You will be expected to understand the regulatory obligations of the firm, and abid e by the regulated entity requirements and JHI policies applicable for your role.