{"id":3270106,"url":"https://alion.io/job/flow-traders-senior-software-engineer-otctech","title":"Senior Software Engineer - OTCTECH","company":{"id":54503,"name":"Flow Traders","domain":"flowtraders.com","url":"https://alion.io/company/flow-traders","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"A","score":87,"open_postings":37,"ghost_share":0,"stale_share":0.27,"repost_share":0.054,"time_to_fill_p50_days":61,"computed_at":"2026-10-27T05:46:45Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Amsterdam, Netherlands"],"countries":["NL"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":77000,"max_usd":131000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":73},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Apache Kafka","optional":false},{"name":"C++","optional":false},{"name":"Java","optional":false},{"name":"Python","optional":false},{"name":"Docker","optional":true},{"name":"GCP","optional":true},{"name":"Google BigQuery","optional":true},{"name":"Kubernetes","optional":true}],"status":"live","first_seen_at":"2026-10-26T09:33:45Z","employer_posted_date":"2026-10-26","last_verified_at":"2026-10-27T19:42:53Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"description":"Flow Traders is transforming its institutional trading platform across Equities, ETFs, Fixed Income, and Crypto. As part of OTCTECH, you will work directly with traders, quants, Operations, Risk, and Compliance to design and deliver a new OTC Trading Engine, automate operational workflows, and modernise existing applications into reliable, maintainable systems.\nWe are looking for a Senior Software Engineer who can take ownership of complex problems from discovery through production. You will need to understand how trading activities and data flow across systems, define clear technical boundaries, make sound architectural decisions, and build solutions that perform reliably in a demanding environment.\nThis role combines greenfield platform development with the opportunity to understand and evolve an established technology estate. It is grounded in strong engineering fundamentals, with quality, correctness, operational resilience, and clear technical judgment at its foundation.\nWhat you will do\nUnderstand the Trading Domain\nWork directly with traders, quants, Operations, Risk, and Compliance to understand requirements and how trading workflows operate in practice.\nTrace business processes and data flows across pre-trade research, execution, post-trade processing, risk, and compliance.\nIdentify opportunities to improve resilience, consistency, automation, and operational efficiency.\nBuild a shared understanding of system responsibilities, dependencies, and operational considerations.\nDesign and Modernise the PlatformHelp design and deliver a new OTC Trading Engine spanning Equities, ETFs, Fixed Income, and Crypto.\n\nDefine appropriate service boundaries, data models, interfaces, and event flows.\nModernise existing applications where new business or engineering requirements create opportunities for improvement.\nMake and document architectural decisions, balancing performance, reliability, simplicity, and delivery speed.\nDesign greenfield services and platforms that can be operated and evolved safely over time.\nBuild Reliable Trading Systems\nDevelop high-performance services, data pipelines, and integrations across Java, C++, and Python environments.\nBuild event-driven systems using messaging and pub/sub patterns.\nEngineer for production from the outset, including testing, observability, failure handling, and operational support.\nEmbed monitoring, root-cause analysis, and recovery mechanisms so issues are identified and resolved quickly.\nTake ownership of delivery from design and implementation through deployment and production operation.\nWhat you need to succeed\nStrong experience building and operating distributed backend systems in production\nExpert in Java or C++, with working knowledge of Python\nStrong understanding of distributed systems, concurrency, and scalable system design\nExperience with event-driven architectures and messaging platforms such as Kafka\nProven track record building high-performance, low-latency systems\nAbility to translate complex business requirements into robust technical solutions\nOwnership mindset with strong stakeholder management and communication skills\nExperience with modern engineering practices including testing, code reviews, observability, and automation\nComfortable leveraging AI tools to improve productivity while maintaining quality and accountability.\nNice to have\nExperience in trading, capital markets, or financial services\nExposure to Google Cloud Platform (GCP)\nExperience with Kubernetes, Docker, and cloud-native technologies\nKnowledge of BigQuery or large-scale data platforms\nExperience working in low-latency, high-throughput environments\nWhat we offer\nAt Flow Traders, we create the conditions for hard-working, high-performing people to do their best work. From a thorough onboarding and ongoing access to Flow Academy, to latest technology and a collaborative, non-hierarchical culture, we give you the tools, ownership, and support to move fast and drive outcomes. We keep a close-knit, small-company feel while offering competitive salary, annual discretionary profit share, and comprehensive benefits, so talent can grow here, and stay here. See our benefits below:\nFlow Academy and opportunities to attend domain-related conferences\nDaily catered lunch, great coffee, and a fully stocked kitchen and snack bar\nIn-house Bar and Lounge with arcade, table tennis, billiards, and game consoles\nCompany boat\nIn-house gym and sessions with our nutritionist or personal trainer\nBi-weekly massages\nAnnual company trip and a variety of events throughout the year, such as the New Years Event\nGlobal rotations across our offices worldwide\nand more\nFlow Traders does not accept unsolicited resumes from any professional staffing or search firms. All resumes, and any other information identifying potential candidates, submitted to any employee at Flow Traders via-email, the Internet or directly without a valid and signed search agreement will be deemed free to contact by Flow Traders without any restrictions and no placement fee of any kind will be paid in the event the candidate is hired by Flow Traders","description_format":"text","description_chars":5111,"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":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Stock Exchanges & Market Infrastructure","Hedge Funds & Alternative Investments"],"lifecycle":[{"event":"open","at":"2026-10-26T11:14:10Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":0,"expected_fill_days":61,"reasons":["conf:3","win:early"],"computed_at":"2026-10-27T05:46:45Z"},"pay":null,"html_url":"https://alion.io/job/flow-traders-senior-software-engineer-otctech","json_url":"https://alion.io/job/flow-traders-senior-software-engineer-otctech.json","meta":{"generated_at":"2026-10-27T23:18:35Z","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":15247,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-28T00:00:00Z"}},"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":54503},"rest":"https://alion.io/mcp/rest/get_company?id=54503"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fflow-traders-senior-software-engineer-otctech"},{"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%2Fflow-traders-senior-software-engineer-otctech"},{"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%2Fflow-traders-senior-software-engineer-otctech"},{"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/flow-traders-senior-software-engineer-otctech\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fflow-traders-senior-software-engineer-otctech"}]}