{"id":3055213,"url":"https://alion.io/job/marsh-mclennan-applications-developer-2","title":"Applications Developer","company":{"id":1769686,"name":"Marsh McLennan","domain":"marshmclennan.com","url":"https://alion.io/company/marshmclennan","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"B","score":80,"open_postings":73,"ghost_share":0,"stale_share":0.986,"repost_share":0,"time_to_fill_p50_days":12,"computed_at":"2026-10-25T05:49:26Z"}},"role":"Backend","role_family":"Backend","seniority":null,"employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["London, United Kingdom"],"countries":["GB"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":78000,"max_usd":192000,"period":"year","method":"role_country_seniority_unknown","sample_n":404},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Airflow","optional":false},{"name":"C#","optional":false},{"name":"Databricks","optional":false},{"name":"Python","optional":false},{"name":"SQL","optional":false}],"status":"live","first_seen_at":"2026-06-19T00:00:00Z","employer_posted_date":"2026-06-19","last_verified_at":"2026-10-25T10:50:24Z","board_verified":true,"closed_at":null,"days_open":128,"trust":{"level":"stale","repost_count":0,"flags":["stale"],"days_open":128},"description":"Company:\nMercerDescription:\nMercer is seeking candidates for the following position based in the London office:\nApplications Developer\nWhat can you expect?\nThis is a hands-on technical role focused on improving the robustness, stability, and performance of our technology systems. You will work across the technology platform, with an initial focus on data pipelines, helping to redesign and enhance data processes to make them more fault tolerant, scalable, and efficient. The role offers broad exposure to investment management data, systems, and the wider business.\nWe will count on you to:\nWork closely with the Head of Production and support teams to identify areas for improvement\n\nLearn our technology architecture and systems, with a focus on trading systems and the data lake used for regulatory reporting\n\nCollaborate with the broader Engineering team to understand practices and architecture\n\nPerform technical analysis to identify root causes of issues\n\nDesign and implement technical changes and improvements\n\nTake part in coding and code reviews\n\nWork closely with business teams as needed\n\nWhat you need to have:\nBSc or MSc in a financial, technological, mathematical, or scientific discipline, with a strong analytical foundation\n\nCurrent experience with C# and Python and a passion for software development\n\nStrong SQL skills\n\nExperience in designing robust data flows and systems\n\nStrong, clear, and concise communication skills, both verbal and written\n\nA strong sense of responsibility and commitment to quality\n\nSelf-driven, motivated work ethic\n\nEnergetic and enthusiastic personality\n\nWhat makes you stand out:\nIMC or another investment management qualification\n\nExperience with Apache Airflow\n\nExperience with Databricks\n\nExperience with asset management data\n\nPassion for design and architecture\n\nWhy join our team:\nWe help you be your best through professional development opportunities, interesting work and supportive leaders\n\nWe foster a vibrant and inclusive culture where you can work with talented colleagues to create new solutions and have impact for colleagues, clients and communities\n\nOur scale enables us to provide a range of career opportunities, as well as benefits and rewards to enhance your well-being\n\nMarsh (NYSE: MRSH) is a global leader in risk, reinsurance and capital, people and investments, and management consulting, advising clients in 130 countries. With annual revenue of over $27 billion and more than 95,000 colleagues, Marsh helps build the confidence to thrive through the power of perspective. For more information, visit corporate.marsh.com, or follow us on LinkedIn and X.Marsh is committed to embracing a diverse, inclusive and flexible work environment. We aim to attract and retain the best people and embrace diversity of age background, civil partnership status, disability, ethnic origin, family duties, gender orientation or expression, gender reassignment, marital status, nationality, parental status, personal or social status, political affiliation, race, religion and beliefs, sex/gender, sexual orientation or expression, skin color, or any other characteristic protected by applicable law. We are an equal opportunities employer. We are committed to providing reasonable adjustments in accordance with applicable law to any candidate with a disability to allow them to fully participate in the recruitment process. If you have a disability that may require reasonable adjustments, please contact us at  is committed to hybrid work, which includes the flexibility of working remotely and the collaboration, connections and professional development benefits of working together in the office. All Marsh colleagues are expected to be in their local office or working onsite with clients at least three days per week. Office-based teams will identify at least one “anchor day” per week on which their full team will be together in person.","description_format":"text","description_chars":3951,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Flexible schedule","Hybrid work","Professional development"],"hiring_locations":[{"name":"United Kingdom","iso":"GB","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":[],"lifecycle":[{"event":"open","at":"2026-10-22T03:22:21Z"}],"visa":[],"liveness":{"score":2,"band":"cold","label":"Long shot","p_open":1,"p_active":0.075,"p_room":0.28,"age_days":128,"expected_fill_days":12,"reasons":["conf:1","stale_co","velocity","win:tail","crowd:brand"],"computed_at":"2026-10-25T05:49:26Z"},"pay":null,"html_url":"https://alion.io/job/marsh-mclennan-applications-developer-2","json_url":"https://alion.io/job/marsh-mclennan-applications-developer-2.json","meta":{"generated_at":"2026-10-25T22:56:18Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":32323,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-26T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":1769686},"rest":"https://alion.io/mcp/rest/get_company?id=1769686"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fmarsh-mclennan-applications-developer-2"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fmarsh-mclennan-applications-developer-2"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fmarsh-mclennan-applications-developer-2"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/marsh-mclennan-applications-developer-2\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fmarsh-mclennan-applications-developer-2"}]}