{"id":2850309,"url":"https://alion.io/job/tenacy-senior-backend-developer","title":"Senior Backend Developer","company":{"id":2175507,"name":"Tenacy","domain":"tenacy.io","url":"https://alion.io/company/tenacy","size_band":"51-200","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Welcome to the Jungle","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Lyon, France"],"countries":["FR"],"hiring_countries":["FR"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":52000,"max_usd":104000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":16},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Flask","optional":false},{"name":"Python","optional":false}],"status":"closed","first_seen_at":"2026-10-19T12:32:22Z","employer_posted_date":"2026-10-19","last_verified_at":"2026-10-21T16:00:47Z","board_verified":false,"closed_at":"2026-10-21T16:00:47Z","days_open":2,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":2},"description":"Rejoins Tenacy, une entreprise en pleine croissance dans le domaine de la cybersécurité. En tant que Senior Backend Developer, tu seras au cœur de notre équipe technique, travaillant sur des projets complexes et stimulants. Tu auras l'opportunité de contribuer activement au développement, de relier les enjeux techniques aux enjeux business, et de faire grandir l'équipe par la revue de code et le pair programming.\nMissions\nContribuer activement au développement, et aimer cela.\nRelier les enjeux techniques aux enjeux business.\nFaire grandir l'équipe par la revue de code et le pair sur les sujets structurants.\nProfil recherché\nIndispensable\nAvoir repris un back-end existant, complexe et peu documenté, et l'avoir remis en état de livrer : pendant des années, sur un système qui ne pouvait pas s'arrêter.\n\nCe qui compte autant\nÊtre à l'aise pour lire un gros code que tu n'as pas écrit, et pour dire ce qu'il fait avant de proposer de le changer.\n\nForte capacité d'analyse et de pragmatisme, dans les arbitrages techniques comme produit.\n\nAvoir déjà travaillé sur des sujets à forte complexité métier.\n\nÀ l'aise dans un environnement mouvant : tu sais naviguer dans la complexité et l'incertitude.\n\nTu utilises l'IA dans ta boucle de développement sur du code de production, et tu sais ce qu'elle produit de mauvais sur une base de code existante.\n\nÉtat d'esprit positif, envie de faire progresser l'équipe et de contribuer à une dynamique collective.\n\nEn plus, si tu l'as : un vrai bonus\nAimer le front et savoir le tenir. Si tu es à l'aise en Vue, ou dans un autre écosystème moderne.\n\nSavoir tenir une fonctionnalité de bout en bout, du composant à l'API, sans passer le relais à chaque frontière.\n\nPas exigé\nPython comme langage principal : on cherche un niveau d'exigence, pas une ligne de CV. Un autre langage pratiqué avec la même rigueur passe très bien.\n\nVue, ni aucun framework front : c'est un bonus, pas un prérequis.\n\nL'expertise Flask : le framework s'apprend.\n\nUne expérience cyber ou GRC : le domaine s'apprend aussi.","description_format":"text","description_chars":2038,"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":[{"language":"French","level":"Advanced (C1)","optional":false}]},"benefits":[],"hiring_locations":[{"name":"France","iso":"FR","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Cybersecurity","Graphic Design","Information Security","Security Compliance"],"lifecycle":[{"event":"open","at":"2026-10-19T13:00:42Z"},{"event":"close","at":"2026-10-21T16:00:47Z"}],"visa":[],"liveness":null,"pay":null,"html_url":"https://alion.io/job/tenacy-senior-backend-developer","json_url":"https://alion.io/job/tenacy-senior-backend-developer.json","meta":{"generated_at":"2026-10-22T22:34:25Z","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":7845,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-23T00:00:00Z"}},"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":2175507},"rest":"https://alion.io/mcp/rest/get_company?id=2175507"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Ftenacy-senior-backend-developer"},{"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%2Ftenacy-senior-backend-developer"},{"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%2Ftenacy-senior-backend-developer"},{"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/tenacy-senior-backend-developer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Ftenacy-senior-backend-developer"}]}