{"id":2376123,"url":"https://alion.io/job/keyes-backend-developer-pythondjango-eu-institution-brussels","title":"Backend Developer (Python/Django) | EU Institution | Brussels","company":{"id":54374,"name":"Keyes","domain":"keyes.eu","url":"https://alion.io/company/keyes","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Recruitee","truth_index":{"grade":"B","score":75,"open_postings":11,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":null,"computed_at":"2026-10-12T06:55:09Z"}},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"freelance","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Brussels, Belgium"],"countries":["BE"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":59000,"max_usd":170000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":6426},"experience_years_min":7,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AWS","optional":false},{"name":"Azure","optional":false},{"name":"Celery","optional":false},{"name":"CI/CD","optional":false},{"name":"Django","optional":false},{"name":"Docker","optional":false},{"name":"Kubernetes","optional":false},{"name":"Python","optional":false},{"name":"RabbitMQ","optional":false},{"name":"Rest API","optional":false},{"name":"SQL","optional":false}],"status":"live","first_seen_at":"2026-10-12T14:20:28Z","employer_posted_date":"2026-10-12","last_verified_at":"2026-10-13T01:57:42Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"description":"Joining KEYES means giving purpose to your talent.\nAre you looking for an environment where technology is not an end in itself, but a lever to build a sustainable future? At KEYES, we are not just looking for technical expertise; we are looking for people who share our values.\nDo you want to continue your career and grow within one of Belgium’s leading IT companies?\nJoin KEYES as a Backend Developer!\nWe support large enterprises, the public sector, healthcare organizations, and SMEs in all their digital challenges: Infrastructure & Cloud Solutions, Cybersecurity Solutions, Business Software Solutions, Mainframe Solutions, Data & AI Solutions, Advisory Solutions, and Staffing Solutions.\nMore information: www.keyes.eu\nTHE BACKGROUND\nFor our client, an EU Institution based in Brussels, we are looking for a Backend Software Engineer (Python/ Django) to join a long-term mission within an international team delivering modern digital services and business-critical applications.\nYou will contribute to the development, maintenance, and enhancement of backend services and APIs, ensuring secure, scalable, and high-performing applications that support key business processes.\nPlease note: candidates must be located within (2) two hours of Brussels, as regular onsite presence is required throughout the assignment.\nYOUR MISSION\nAs a Backend Developer, your responsibilities will be as follows:\nDevelopment of back-end website applications using Python and Django.\n\nIntegration of user-facing elements developed by front-end developers with server-side logic.\n\nImplement core business logic using Python 3.11 and Django.\n\nDesign and implementation of data storage solutions using relational databases and SQL.\n\nApply data and security best practices: input validation, authentication/authorization, secure storage, compliant logging and monitoring.\n\nOptimization of applications for maximum speed, scalability, and reliability.\n\nDesign and develop APIs and backend services.\n\nParticipating in the design and creation of scalable software architectures.\n\nMaintenance of code integrity and organisation.\n\nWriting clean, functional, and maintainable code on the back-end.\n\nCompile and analyse data, processes, and code to troubleshoot problems and identify areas for improvement, including setting up and querying monitoring tools.\n\nPerform unit and integration testing, debug, fix, and validate code changes.\n\nDeliver solutions that fulfil functional and non-functional requirements and align with user expectations.\n\nWrite technical documentation.\n\nBasic configuration of containerised environments and cloud-based services supporting back-end functionality.\n\nDevelop and maintain services and business logic using Python, Django ORM, and asynchronous task-processing frameworks.\n\nImplement authentication and authorization mechanisms to secure APIs and services.\n\nWrite and maintain unit and integration tests to ensure code quality and reliability, integrating them into CI/CD pipelines.\n#LI- MS1\n\nRequirements\nYOUR PROFILE\nBachelor's degree with at least 7 years of relevant professional experience, OR\n\nMaster's degree with at least 5 years of relevant professional experience\n\nAbility to understand, speak, and write English (minimum B2 level)\n\nTechnical knowledge REQUIRED\nStrong experience with Python 3.11 development.\n\nProven experience with Django 4.2+ and the Django ORM.\n\nSolid experience designing, developing, and maintaining REST APIs and backend services.\n\nGood knowledge of SQL and relational database design.\n\nTechnical knowledge PREFERRED\nExperience with asynchronous task-processing frameworks such as Celery, RabbitMQ, Faktory, or equivalent technologies.\n\nExperience with containerization technologies and modern deployment environments.\n\nKnowledge of code quality, linting, testing, and CI/CD practices.\n\nUnderstanding of authentication, authorization, and application security best practices.\n\nExperience troubleshooting complex backend applications and performance issues.\n\nStrong documentation and collaboration skills.\n\nSoft skills\nTalent for attention to detail in code correctness, error handling, and documentation.\n\nAbility to analyse complex back-end issues and design effective solutions.\n\nCapability of integration in an international and multicultural environment.\n\nAbility to participate in multilingual meetings.\n\nExcellent interpersonal and communication skills.\n\nAbility to work in a team as well as autonomously.\n\nResults-oriented mindset, focused on delivering high-quality solutions.\n\nCertifications\nAny of the following certifications would be considered an asset:\nAWS Certified\n\nDeveloper Associate, Microsoft Azure Developer Associate, or CNCF\n\nCertified Kubernetes Application Developer (CKAD)\n\nDo you recognise yourself in this description?\nDo you want to learn more?\nApply now! You will be contacted shortly\nWhat if the mission isn’t an exact match for you?\nLet’s stay in touch! Sign up, and we may contact you for other future opportunities:\nhttps://keyescareers.eu/find-my-job\nKEYWORDS\nBackend Developer - Python - Django - Django ORM- SQL- REST APIs - Celery - RabbitMQ - Docker - CI/CD","description_format":"text","description_chars":5142,"description_truncated":false,"requirements":{"experience_years_min":7,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"English","level":"Upper-Intermediate (B2)","optional":false}]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Cybersecurity","Information Technology","Hospitals & Health Systems","Managed IT Services (MSP)"],"lifecycle":[{"event":"open","at":"2026-10-12T18:36:29Z"}],"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":44,"reasons":["conf:1","win:early"],"computed_at":"2026-10-13T03:07:11Z"},"pay":null,"html_url":"https://alion.io/job/keyes-backend-developer-pythondjango-eu-institution-brussels","json_url":"https://alion.io/job/keyes-backend-developer-pythondjango-eu-institution-brussels.json","meta":{"generated_at":"2026-10-13T03:07:11Z","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":4705,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-14T00:00:00Z"}},"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":54374},"rest":"https://alion.io/mcp/rest/get_company?id=54374"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fkeyes-backend-developer-pythondjango-eu-institution-brussels"},{"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%2Fkeyes-backend-developer-pythondjango-eu-institution-brussels"},{"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%2Fkeyes-backend-developer-pythondjango-eu-institution-brussels"},{"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/keyes-backend-developer-pythondjango-eu-institution-brussels\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fkeyes-backend-developer-pythondjango-eu-institution-brussels"}]}