{"id":3587872,"url":"https://alion.io/job/access-softek-senior-back-end-developer-c","title":"Senior Back End Developer (C#)","company":{"id":66139,"name":"Access Softek","domain":"accesssoftek.com","url":"https://alion.io/company/accesssoftek","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"HeadHunter","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"senior","employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"inferred_payroll_markers","remote_working_hours":{"label":"PST","utc_offset_min":-8,"utc_offset_max":-8},"hiring_geo_confidence":"inferred","locations":[],"countries":[],"hiring_countries":["US"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":81000,"max_usd":207000,"period":"year","method":"global_role_seniority_cell","sample_n":7767},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":".NET","optional":false},{"name":"C#","optional":false},{"name":"ChatGPT","optional":false},{"name":"CI/CD","optional":false},{"name":"Claude Code","optional":false},{"name":"Copilot","optional":false},{"name":"Cursor","optional":false},{"name":"Git","optional":false},{"name":"LLM","optional":false},{"name":"Model Context Protocol","optional":false},{"name":"MS SQL","optional":false},{"name":"RabbitMQ","optional":false},{"name":"RAG","optional":false},{"name":"Rest API","optional":false}],"status":"live","first_seen_at":"2026-11-01T13:16:00Z","employer_posted_date":null,"last_verified_at":"2026-11-01T13:16:00Z","board_verified":false,"closed_at":null,"days_open":5,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":5},"description":"Access Softek has been building software for the financial industry for over 30 years. Headquartered in Berkeley, California, we work with hundreds of banks and credit unions across the U.S., helping them deliver modern digital banking experiences to millions of users.\n\nWe are looking for a Senior Back End Developer (C#) to join our Banking Platform Team.\n\nThis team builds and maintains the core services behind our award-winning online banking platform, used by 400+ Financial Institution clients. Their work includes leading complex feature delivery and driving our monolith-to-microservices migration — the kind of work that combines deep backend engineering with real-world FinTech and cloud architecture challenges. The team is a strong fit for an engineer who enjoys solving complex, high-scale backend problems and wants to gain deep exposure to cloud architecture in a mission-critical domain.\n\nYou will work with C# .NET Core, .NET Framework 4.8, MS SQL Server, RabbitMQ, and REST, partnering closely with product managers, QA engineers, and front-end developers in a distributed team. AI-assisted development tools (GitHub Copilot, Cursor, Claude Code, ChatGPT) are also part of the team's everyday workflow, helping developers move faster with coding, debugging, refactoring, testing, and documentation.\n\nImportant: this role requires overlap with 2 AM–10 AM PST/PDT — some flexibility is possible in both directions.\n\nPrimary Responsibilities:\nLead design and delivery of complex features, from ideation to production.\n\nProactively identify problems and drive technical decisions with minimal oversight.\n\nUse AI-assisted tools to accelerate delivery, critically validating output for correctness and security.\n\nProduce clear documentation for API consumers.\n\nDrive automated test coverage for your components.\n\nOwn and evolve code within your product area, including microservices architecture.\n\nModernize legacy functionality and improve the maintainability of existing solutions.\n\nFollow engineering best practices around code review, version control, CI/CD, and secure development.\n\nInvestigate issues, analyze logs and telemetry, and deliver safe, reliable fixes.\n\nShare knowledge and help improve team development practices.\n\nRequirements:\n5+ years building web apps/backend APIs in C#.\n\nProven experience making architectural decisions and owning technical trade-offs.\n\nStrong OOD principles, classic design patterns (GoF).\n\nExperience with microservices architecture, as well as working with and modernizing legacy systems.\n\nStrong data modeling / MS SQL / data access optimization.\n\nExperience with API design, implementation, and troubleshooting.\n\nUnit & integration testing (NUnit/xUnit, FluentAssertions, Moq).\n\nComfortable owning code from commit to production, with strong CI/CD and Git-based workflow experience.\n\nUnderstanding of web security fundamentals and secure coding practices.\n\nComfortable using AI tools as a core part of daily engineering work — applied to production-quality code, not just casual experimentation.\n\nExperience integrating LLM/AI features into products (agents, RAG, MCP-based tooling), building internal AI-driven developer-productivity tooling would be a plus. \n\nGood communication skills and Intermediate+ English.\n\nWhat We're Looking For (Beyond Tech Skills):\n\nCommunication & Clarity — Explains problems, trade-offs, and solutions clearly to both technical and non-technical stakeholders.\n\nOwnership & Accountability — Takes accountability for outcomes, proactively flags risks, and stays engaged beyond assigned tasks.\n\nGrowth Mindset & Leadership — Eager to learn, goal-oriented, with experience leading a team, project, or initiative.\n\nOur benefits:\nFlexible working hours\n\nExperienced development teams\n\nLong-term employment\n\nCompetitive salary \n\nPaid vacation and days off on national holidays\n\nPaid sick leave and internal medical insurance policy\n\nMental health coverage\n\nCompensation for training and additional education\n\nCommunity of practice, regular knowledge sharing among colleagues\n\nProvision of computer equipment is needed \n\nInternet compensation (50$ per month)\n\nAnd other benefits, described in detail in the Staff Handbook\n\nOriginally posted on Himalayas","description_format":"text","description_chars":4235,"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","Health insurance"],"hiring_locations":[{"name":"United States","iso":"US","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Financial Services","Digital Banks & Neobanks"],"lifecycle":[{"event":"open","at":"2026-11-01T14:30:45Z"}],"visa":[{"country":"US","licensed_sponsor":true,"evidence":"Filed H-1B visas in the last two 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