Context Architecture for Serious AI Agents

Hire Context Engineers
Who Control What the Model Sees

Hire Context Engineers who design the information layer behind reliable AI products: what enters the context window, what gets retrieved, what becomes memory, what tools can see, what is summarized, what is redacted, and how context quality is measured.

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Senior Context Engineer

RAG LangGraph pgvector Rerankers
All Levels

$5,500/mo

Junior from $2,800/mo · Mid from $4,000/mo · Senior from $5,500/mo

7-Day Risk-Free Trial

Zero commitment start

Onboard in 48 Hours

Pre-vetted, ready to ship

AI-Native Development

Faster iteration, cleaner code

Trusted by CTOs, Engineering Leaders & Operators Worldwide

Trusted by CTOs, Engineering Leaders & Operators Worldwide

Trusted by CTOs, Engineering Leaders & Operators Worldwide

Trusted by CTOs, Engineering Leaders & Operators Worldwide

Trusted by CTOs, Engineering Leaders & Operators Worldwide

10+ Years in Business

500+ Projects Delivered

200+ Global Clients

4.9/5 Client Satisfaction

Why Companies Struggle to Hire Context Engineers

As AI systems become more agentic, context becomes the product surface. When the wrong instructions, retrieved passages, tool outputs, memories, or summaries reach the model, teams get confident wrong answers, runaway token cost, privacy exposure, and agents that cannot finish long tasks.

The Hiring Problem

Long-running agents carry stale turns, repeated tool outputs, and outdated plans until the model starts optimizing for old context

RAG systems retrieve plausible passages instead of the right passages because chunks, metadata, filters, rerankers, and citations were not designed together

Prompts grow with every feature, tool, and memory rule until latency, cost, and tool-call accuracy collapse

Memory features store customer facts, preferences, and work history without clear scope, consent, retention, conflict handling, or tenant isolation

Our Solution

Engineers define context contracts for each workflow: instructions, recent state, retrieved sources, memory, tool results, response format, and uncertainty rules

Retrieval pipelines use ingestion rules, chunking, metadata filters, hybrid search, reranking, citations, freshness checks, and evaluation sets

Token budgets are managed per turn, tool call, agent role, retrieval packet, summary, and long-running workflow stage

Memory policies separate user, session, project, organization, episodic, and procedural memory with write rules, retention, redaction, and observability

Why Hire Context Engineers from Devlyn

Senior, product-minded Context Engineers vetted for retrieval judgment, agent architecture, privacy awareness, product sense, evaluation discipline, and the ability to turn messy knowledge sources into dependable model inputs.

Why Hire Context Engineers from Devlyn
Memory Design

Memory Design

Builds user, session, project, organization, episodic, semantic, and procedural memory layers with scope, retention, conflict resolution, and write policies.

Retrieval Coupling

Retrieval Coupling

Connects vector search, BM25, metadata filters, rerankers, source permissions, freshness rules, and context assembly so the model sees useful evidence.

Token and Context Budgeting

Token and Context Budgeting

Controls prompt size, history windows, retrieval packets, tool schemas, summaries, cached prefixes, and per-step token cost.

Summarization and Compression

Summarization and Compression

Compresses histories, plans, tool results, and handoff notes while preserving decisions, constraints, preferences, unresolved issues, and provenance.

Tool Context

Tool Context

Designs tool registries, descriptions, schemas, ordering, permissions, read/write boundaries, and selection hints so agents call the right tool for the right reason.

Context Evaluation

Context Evaluation

Measures retrieval precision, hit rate, MRR, context relevance, answer faithfulness, citation coverage, token efficiency, memory usefulness, and leakage risk.

How hiring actually works.

No procurement cycle, no mystery shortlists. Six steps from first call to first shipped feature, with timelines you can defend to leadership.

A 30-minute call maps the AI product, agent loop, context window limits, retrieval stack, memory design, knowledge sources, privacy constraints, failure examples, latency and cost pressure, evaluation gaps, timezone overlap, and the first context outcome that would prove this hire is useful.
Context Engineer Scoping Call
Within 24 hours, you receive pre-vetted Context Engineer profiles matched against context windows, memory design, retrieval packing, RAG evaluation, agent state, tool context, metadata strategy, privacy boundaries, and context failure modes. Each profile explains why the engineer fits your actual AI product.
Context Engineer Shortlist
Use the interview loop to test how the engineer would debug a hallucinating answer, shrink an overgrown prompt, decide what memory is writable, design citations, select rerankers, compress tool results, or build an eval set for your highest-risk questions. You can run system design, live review, portfolio walkthrough, or a paid task based on your real work.
Interview for Context Engineer Fit
NDA and IP assignment are completed first. Then we set up access to prompts, evals, traces, retrieval indexes, source documents, memory stores, tool schemas, product analytics, support tickets, user permissions, and the first context flow to tune.
Onboard Into the Context Engineer Workflow
By day 7, you should see a better grounded response path: a context contract, retrieval or memory fix, token budget change, trace review, evaluation slice, missed-context analysis, or summary compression plan tied to your real failure cases.
First Context Engineer Proof Point
During the risk-free trial, you evaluate grounding discipline, retrieval judgment, context budgeting, privacy awareness, and ability to reduce hallucination through better information design. If the fit is wrong, we replace the engineer within 48 hours.
Context Engineer Trial Check

Context Engineer: Engagement Options

Three transparent ways to engage. All rates are in USD and exclude taxes. No recruitment fees, no notice periods.

Sprint

Context Architecture Sprint

$14,000

fixed

3 weeks, senior context engineer

  • Current-state audit
  • Memory + retrieval architecture
  • Eval against current behavior
  • Production rollout plan

Context Pod

Context + Retrieval + LLM Eng

$14,500

/mo

3-person pod, 3–6 months

  • End-to-end context + retrieval
  • Memory layer in production
  • Eval + observability
  • Production runbooks

Where Context Engineers Create Leverage

Context Engineers create leverage anywhere AI has to remember, retrieve, decide, or continue work across turns. The value is clearest when the model already works in demos but fails under real users, real permissions, real documents, or long workflows.

01.

Long-Running Agents

Support agents, sales assistants, copilots, or coaches that span many sessions with state checkpoints, task summaries, handoff notes, memory reads, and stale-context controls.

02.

Enterprise RAG

Improve retrieval quality for large knowledge bases, tickets, product docs, contracts, policies, and code through ingestion, metadata, hybrid retrieval, reranking, citations, and evals.

03.

Personalization Memory

Remember useful user preferences, account facts, and workflow patterns with consent, tenant boundaries, retention rules, forgetting flows, and conflict handling.

04.

Coding Agent Context

Assemble repository maps, dependency context, symbols, open issues, recent diffs, failing tests, tool results, and implementation constraints for coding agents.

What should change after you hire Context Engineers

A CTO hires Context Engineers when the AI product is limited less by model choice and more by the information the model receives. The outcome is an AI system that carries the right state forward, retrieves useful evidence, remembers only what should persist, uses tools with clear boundaries, and exposes enough traces and metrics for the team to improve quality without guessing.

Outcome 01 Models receive the right context packet for each job
+

The first meaningful outcome is a context contract for the AI workflow. That contract defines which instructions, recent turns, retrieved sources, user or account memories, runtime configuration, tool results, schema constraints, and uncertainty rules are allowed into the model call. It also defines what should stay out: stale summaries, duplicated tool output, irrelevant search hits, private data from the wrong tenant, and low-value memory. For a support agent, this can mean current issue state, customer entitlements, relevant policy passages, and a concise ticket history. For a coding agent, it can mean symbols, failing tests, dependency constraints, recent diffs, and file-level retrieval instead of a raw repository dump.

Evidence to expect: Expect a context contract, trace examples, prompt assembly rules, retrieval packet design, and before/after examples on real failure cases.

Outcome 02 Memory becomes useful without becoming privacy debt
+

A memory feature should not become an uncontrolled archive of user conversations. Devlyn Context Engineers define what can be remembered, who it belongs to, when it expires, how it is updated, how conflicts are resolved, and how a user or admin can delete it. They separate short-term session state from long-term memory, distinguish personal preferences from account facts, and treat organization-level memory differently from user-scoped memory. This matters for personalization, copilots, agents, and customer support because the model must remember enough to be useful without leaking confidential details, carrying incorrect assumptions forward, or overfitting to one noisy interaction.

Evidence to expect: Expect memory scopes, read/write rules, retention notes, redaction decisions, deletion paths, and traceable examples of when memory is used or ignored.

Outcome 03 Retrieval and answers become measurable
+

Context quality has to be measured or every improvement becomes opinion. A strong engagement defines evaluation sets from real questions, expected sources, known failures, customer tickets, support macros, product docs, policies, or codebase tasks. The metrics can include hit rate, MRR, retrieval precision, context relevancy, answer faithfulness, citation coverage, refusal quality, hallucination rate, token count, latency, and cost per successful task. These signals give CTOs and product leaders a way to decide whether chunking, metadata, query rewriting, reranking, summarization, memory reads, or model selection actually improved the product.

Evidence to expect: Expect an eval dataset, baseline scores, trace review notes, retrieval metrics, token and latency impact, and a prioritized tuning backlog.

Outcome 04 Long-running workflows stay coherent
+

The strongest Context Engineers help agents continue work without dragging the entire past into every call. They design trimming, compression, summaries, task state, handoff notes, tool-result digests, issue-specific memory, and recovery rules. This is what keeps a sales assistant aligned after five calls, a support agent coherent across multiple tickets, a coding agent focused across a repository-wide change, or an operations copilot accurate during an incident. The team should keep the patterns, not only the implementation: when to summarize, what never gets summarized, what must remain verbatim, and what gets escalated to a human.

Evidence to expect: Expect summary formats, compression rules, task-state schemas, handoff examples, runbooks, and failure-mode notes your team can maintain.

How to decide if Devlyn is the right partner for Context Engineers

Choose us when

You need a Context Engineer when an AI product already has users, documents, tools, workflows, or memories, and reliability now depends on context design instead of another prompt rewrite.

Interview for

Use the interview to test memory scope, retrieval packing, chunking strategy, metadata use, reranking, citation quality, token budgeting, tool context, summarization, privacy boundaries, and how the engineer would prove progress against your failures.

Expect clarity on

Scope, source access, memory permissions, eval ownership, trace access, review cadence, privacy constraints, tool boundaries, source-code access, IP assignment, timezone overlap, and what proof should exist by day 7.

Do not accept

A generic shortlist, vague seniority claims, no review of your actual AI failures, no plan for evals or traces, unclear pricing, weak security process, or a vendor who treats context engineering as prompt writing.

Delivery governance and risk control

Devlyn is positioned as a senior AI and software engineering partner, not a resume marketplace. You get structured onboarding, secure access, NDA and IP assignment support, communication overlap, replacement flexibility, and delivery governance built around the outcome you are hiring for.

For Context Engineer engagements, governance means source rules, memory boundaries, context formats, retrieval traces, freshness policies, eval ownership, and tool access are explicit. The engineer should know which data sources can be retrieved, which memories can be written, which user or tenant scope applies, what must be cited, what must be redacted, and which failures require human review. Delivery is judged through traceable improvements in context relevance, faithfulness, token efficiency, latency, and user-visible answer quality.

Ready to Hire a Context Engineer?

Share your agent workflow, retrieval stack, memory design, and failure cases. We will shortlist engineers who can make the context layer reliable enough for production use.

NDA Protected

7-Day Risk-Free Trial

AI-Native Delivery

Same-Day Response

Frequently Asked Questions

Answers for CTOs, engineering leaders, product leaders, operators, and hiring managers comparing senior engineering capacity, delivery models, risk controls, and long-term ownership.

You can usually start the hiring conversation immediately and receive a shortlist within 24 hours after we understand your AI product, agent workflow, retrieval stack, memory design, knowledge sources, failure cases, timeline, and seniority needs. The goal is not to send resumes quickly. It is to send Context Engineers who can reason about the information your model sees and the failure modes your users already experience.

Yes. You interview the shortlisted engineers before committing. We recommend using a real AI failure in the interview: a hallucinated answer, a bloated prompt, a missing citation, a stale memory, a bad tool call, or an overlong conversation that lost the user goal. Ask the engineer to explain which context should be added, removed, summarized, retrieved, remembered, or blocked.

The first week should produce visible proof that the engineer understands your context layer. You should see a trace review, context contract, retrieval or memory fix, token budget recommendation, summary format, evaluation slice, or before-and-after response path based on your real failure cases. If progress is unclear, you should know that during the trial, not after a long contract cycle.

A Context Engineer designs how an AI system assembles information for the model. That includes system instructions, recent conversation state, retrieved documents, metadata, memory, tool results, response formats, user permissions, summaries, and uncertainty rules. The role is different from general prompt writing because it owns the full context pipeline that affects reliability, cost, privacy, and answer quality.

Quality is managed through senior screening, role-specific interview criteria, architecture review, trace review, eval design, and delivery checkpoints. We look for practical judgment across memory scope, retrieval quality, context packing, metadata, reranking, token budgets, summarization, tool schemas, source permissions, privacy boundaries, and measurable answer quality.

Yes. The engineer joins your repositories, prompts, evals, traces, retrieval indexes, vector databases, product analytics, support tools, issue tracker, standups, and review process at the access level you approve. The operating model defines who owns sources, who can change memory writes, how evals are reviewed, and how context changes are released.

Yes. Devlyn works with distributed teams and plans overlap windows for interviews, standups, trace reviews, eval reviews, and escalation. For Context Engineer engagements, the communication rhythm is tied to proof points that matter: context relevance, citation quality, retrieval precision, hallucination reduction, token efficiency, latency, and user-visible answer usefulness.

NDA and IP assignment are handled before onboarding. Access is scoped to the repositories, prompts, traces, knowledge sources, vector indexes, memory stores, and evaluation datasets required for the scope. Sensitive context work follows your security rules for source permissions, tenant isolation, redaction, retention, audit logs, and approval workflows.

Use the risk-free trial to evaluate whether the engineer can understand your AI failures, inspect traces, communicate tradeoffs, and improve context quality without creating privacy or product risk. If the fit is wrong, we replace the engineer within 48 hours instead of forcing you through a long notice period or another sourcing cycle.

You can start with one specialist and expand only if the scope requires it. Common expansion paths include Retrieval Engineers for RAG quality, LLM Engineers for model behavior and orchestration, AI Product Engineers for user experience, Data Engineers for source pipelines, Security Engineers for sensitive data controls, and Platform Engineers for observability and deployment.

Typical options include a Context Architecture Sprint, a dedicated Senior Context Engineer, or a Context plus Retrieval plus LLM Engineering pod for larger production systems. We confirm the model after discovery so you can compare a focused audit, a dedicated hire, or a small pod against the actual risk: hallucination, memory leakage, bad retrieval, token cost, long-running agent failure, or missing evaluations.

We can support both models. If you already have strong product and engineering leadership, the engineer can plug into your process. If you need more structure, Devlyn can add delivery oversight, sprint planning, reporting, and senior technical review around context contracts, memory policy, retrieval tuning, trace review, eval design, and rollout checkpoints.

Devlyn reduces the hidden work of sourcing, vetting, onboarding, replacing, and governing specialist AI talent. That matters for Context Engineers because the risk is often hard to spot in a resume: the model looks capable, but it fails because the wrong context is retrieved, too much history is carried forward, memory is unsafe, or traces cannot explain the answer. You get a shorter path to qualified candidates and a trial focused on technical proof.

Devlyn is a better fit when context work affects production answers, customer trust, sensitive data, tool execution, cloud cost, or long-term product quality. You get vetting, replacement support, delivery governance, IP protection, and continuity around outcomes like context contracts, safe memory, measurable retrieval, token budgets, traceability, and maintainable agent behavior.

The strongest fit is work where AI quality depends on the right information reaching the model. Common examples include long-running customer support agents, sales copilots, enterprise RAG over policies or tickets, coding agents over large repositories, personalization memory, agent handoff summaries, tool context design, source citation, prompt compression, retrieval evaluation, and privacy-safe memory for multi-tenant products.