{"id":4315863,"url":"https://alion.io/job/wiremind-software-engineer-mf-cdi-paris-2","title":"Software Engineer (M/F) - CDI - Paris","company":{"id":172848,"name":"Wiremind","domain":"wiremind.io","url":"https://alion.io/company/wiremind","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Teamtailor","truth_index":null},"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":["Paris, France"],"countries":["FR"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"ArgoCD","optional":false},{"name":"ClickHouse","optional":false},{"name":"GitLab","optional":false},{"name":"Kubernetes","optional":false},{"name":"Machine Learning","optional":false},{"name":"Python","optional":false},{"name":"Angular","optional":true},{"name":"CI/CD","optional":true},{"name":"D3.js","optional":true},{"name":"ElasticSearch","optional":true},{"name":"Flask","optional":true},{"name":"Grafana","optional":true},{"name":"JavaScript","optional":true},{"name":"Kibana","optional":true},{"name":"Next.js","optional":true},{"name":"NgRx","optional":true},{"name":"PostgreSQL","optional":true},{"name":"Prometheus","optional":true},{"name":"React.js","optional":true},{"name":"Redis","optional":true},{"name":"SQLAlchemy","optional":true},{"name":"TypeScript","optional":true}],"status":"live","first_seen_at":"2026-11-13T18:20:45Z","employer_posted_date":"2026-11-13","last_verified_at":"2026-11-14T15:54:34Z","board_verified":true,"closed_at":null,"days_open":1,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":1},"description":"Since 2014, Wiremind has established itself as a tech company transforming the transport and events industries with a 360° approach combining user experience (UX), software and artificial intelligence (AI).\nOur expertise lies primarily in optimizing and distributing our clients’ capacity. We work on a wide range of projects such as demand forecasting and ticket pricing, 3D optimization of air freight or competitor price scraping. Our applications are go-to tools for companies such as SNCF, United Airlines, Qatar Airways or PSG, which use them to visualize, analyze and optimize their capacity.\nDynamic and ambitious, we are committed to preserving our technical DNA, the true engine of our success. Self-financed for more than 10 years, we have just raised our first funds to accelerate. The company is mainly made up of engineers and experts and keeps developing its business model based on Software-as-a-Service (SaaS) solutions.\nAs a Software Engineer, you will join the team behind Cayzn, our Revenue Management solution. To give you an idea of its scale:\nEvery year, more than 300 million passengers travel by train, plane or bus at a price driven by Cayzn. Behind the scenes, our machine learning models recommend prices, and our systems execute 28 million business rules and process more than 2 million pricing decisions every day.\nThis is the system you will work on, in production.\nPermanent contract (CDI) · Hybrid: 2 days of remote work per week · ASAP\nYour missions\nAs a Software Engineer, you will take part in the development of new Cayzn features. With the support of our Product Experts and Data Scientists, you will help solve the business and technical challenges faced by our clients, mainly railway companies, airlines and bus operators.\nIn practice, even though no two days are alike, you will:\nDevelop new features for our users, with a strong focus on code quality, alongside senior developers.\n\nTake part in maintenance, application monitoring and infrastructure management: you own what you ship, all the way to production.\n\nReduce technical debt, propose new solutions and challenge architecture choices to continuously improve the codebase.\n\nExchange daily with our product team to share your ideas for improving Cayzn and deepen your understanding of our clients’ needs.\n\nYour first projects could be\n#1 - Make the pricing pipeline cheaper to run: \"Cut the memory and CPU cost of the nightly pricing pipeline. A recent project removed redundant price history and reduced worker memory by 30-40% on our largest clients, measured in production.\"\n\n#2 - Let revenue managers steer the optimisation. \"Give revenue managers control over the price recommendations of each train: a target booking curve, a fixed strategy, or steering applied at the next optimisation run. The work goes from the database model through the optimisation engine to the API.\"\n\n#3 - Bring bookings into the analytics in real time. \"Stream bookings and ancillary sales into our ClickHouse data warehouse, so that clients' dashboards refresh during the day instead of after the nightly batch.\"\n\nOur tech stack\nBackend: Python, SQLAlchemy, Remoulade, Flask\n\nFrontend: TypeScript, Angular, NGRX, D3.js, Next.js\n\nDatabases and storage: PostgreSQL (several terabytes), Elasticsearch, Redis, Clickhouse\n\nContinuous integration and delivery: GitLab, ArgoCD\n\nInfrastructure: Kubernetes\n\nMonitoring and operations: Prometheus/Grafana and Kibana\n\nSome figures: ~13 commits merged per day, ~ production release per week, 20 isolated client environments in production (81 environments in total) on Kubernetes, all deployed using GitLab and ArgoCD.\"\nYour profile\nAt least one internship in backend development in a production environment\n\nYou have solid experience with Python (or another backend language) and a good command of relational databases.\n\nYou write clean, tested and maintainable code, and you enjoy evolving an existing codebase.\n\nYou already use AI in your development workflow and are curious to push its use further.\n\nYou can take an ambiguous topic and move it forward autonomously.\n\nYou can clearly explain a technical concept to a non-specialist, as you will work closely with complex business domains (pricing, distribution).\n\nWhat will make the difference: experience with high-volume systems, an interest in design and UX, or open source contributions you are proud of.\nOur benefits\nBy joining us, you will be part of:\nA historically self-financed startup with a strong tech identity, which has just raised its first funds to accelerate its growth!\n\nBeautiful 800 m² offices in the heart of Paris, boulevard Poissonnière\n\nAttractive compensation, indexed on performance\n\nA caring and stimulating team that encourages skills development through initiative and autonomy\n\nA learning-friendly environment with growth opportunities\n\nYou will also benefit from:\nA hybrid policy: 2 days of remote work per week and the possibility to occasionally work from abroad\n\nAccess to WellPass at a preferential rate to take care of your well-being\n\nA great company culture: monthly afterworks, regular meetups around tech and products, annual off-site seminars and team building activities…\n\nOur recruitment process\nA first call with Yasmine, our Talent Acquisition Specialist\n\nA technical test or case study to prepare\n\nA final interview with a manager at our offices to discuss your technical test or case study and meet the team\n\nWiremind is committed to equal opportunity, diversity and fairness. We encourage everyone with the necessary experience and skills to apply to our job offers.","description_format":"text","description_chars":5588,"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":["Growth opportunities"],"hiring_locations":[{"name":"France","iso":"FR","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Travel Technology","Commercial Aviation"],"lifecycle":[{"event":"open","at":"2026-11-14T15:54:34Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":1,"expected_fill_days":49,"reasons":["conf:3","win:early"],"computed_at":"2026-11-14T19:07:32Z"},"pay":null,"html_url":"https://alion.io/job/wiremind-software-engineer-mf-cdi-paris-2","json_url":"https://alion.io/job/wiremind-software-engineer-mf-cdi-paris-2.json","meta":{"generated_at":"2026-11-14T19:07:32Z","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":23188,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-15T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"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":172848},"rest":"https://alion.io/mcp/rest/get_company?id=172848"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fwiremind-software-engineer-mf-cdi-paris-2"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"free","price":{"credits":0,"usd":0},"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%2Fwiremind-software-engineer-mf-cdi-paris-2"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"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%2Fwiremind-software-engineer-mf-cdi-paris-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/wiremind-software-engineer-mf-cdi-paris-2\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fwiremind-software-engineer-mf-cdi-paris-2"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":4315863}},{"tool":"search_jobs","arguments":{"company":"wiremind.io","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":4315863},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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